Re: [Elecraft] P3 history

[Joe Subich, W4TV]

Please look at the K3s Owners Manual.  The cabling necessary
to connect the K3S (and K3 with KIO3B) RJ45 Serial connection
to the 2 x DB9 connectors of the P3  or to connect the
K3 (DB9) serial connection to the P3 ... is fully documented
there.
73,

   ... Joe, W4TV


On 3/7/2024 6:41 PM, Doug Hensley wrote:

Okay, I found an image of the apron of an early P3 & it is using a DB9 RS232 
sub d connector.

Does anyone know this can be adapted to the later CAT5/6 socket the newer K3s 
uses?

Doug W5JV









From: Doug Hensley 
Sent: Thursday, March 7, 2024 5:24 PM
To: elecraft@mailman.qth.net 
Cc: Don Wilhelm 
Subject: P3 history

I recently heard that early P3's (first gen ?) used a different P3-to-K3 cable 
than the last generation of P3-to-K3s's did.  Can anyone tell me anything about 
that?  And is there a fix for connecting an eary P3 to a late K3s?

Or was my leg being pulled? 

Thanks,

Doug W5JV




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Re: [Elecraft] P3 history

[Doug Hensley]

Okay, I found an image of the apron of an early P3 & it is using a DB9 RS232 
sub d connector.

Does anyone know this can be adapted to the later CAT5/6 socket the newer K3s 
uses?

Doug W5JV









From: Doug Hensley 
Sent: Thursday, March 7, 2024 5:24 PM
To: elecraft@mailman.qth.net 
Cc: Don Wilhelm 
Subject: P3 history

I recently heard that early P3's (first gen ?) used a different P3-to-K3 cable 
than the last generation of P3-to-K3s's did.  Can anyone tell me anything about 
that?  And is there a fix for connecting an eary P3 to a late K3s?

Or was my leg being pulled? 

Thanks,

Doug W5JV






Visit https://www.qrz.com/db/W5JV for some great vacuum tube finds.


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Re: [Elecraft] P3 + SVGA (and cables)

[Fred Jensen]

That's the connector where the K-POD connects in addition to whatever 
Elecraft techs use it for


73,

Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

Robert Brown via Elecraft wrote on 3/6/2024 6:34 PM:

Excellent condition P3 w/SVA option.  Only “defect” is that a underbody 
connector (presumably only used by Elecraft techs) is detached.  Will provide 
original part if replacement is desired, but seems to serve no useful purpose.  
Unit is otherwise in pristine operational and cosmetic condition. Will include 
cables for both K3 and K3s rigs. $775/shipped/insured CONUS.  Bob Brown, N1CVX 
(sashan...@yahoo.com)
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Re: [Elecraft] P3 w/TXMON

[Tony Cuttone]

P3 has been SOLD.

Tony W3FLH

From: Tony Cuttone 
Sent: Tuesday, December 19, 2023 3:52 PM
To: elecraft@mailman.qth.net 
Subject: FS: P3 w/TXMON

Hello everyone,

I have for sale a P3 Panadapter w/TXMON option (s/n #385), no SVGA.  In 
excellent condition, includes E980169 or E980297 to connect to Elecraft K3/K3S 
(for either KIO3 or KIO3B) and a generic RS232 to connect to a PC, as well as a 
printed manual.  This was originally purchased by a member of my club, then 
sold to me and used for several years in my shack until I purchased another 
that had both options.  You can see a pic of this exact unit in operation on my 
QRZ.com bio. Asking $775 delivered (Lower 48); If you can arrange pick up 
(Philadelphia region), I can take $$ off the price.

You can contact me off-list for more info.  I can send pics upon request.

Tony W3FLH
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Re: [Elecraft] P3

[Jim Brown]

On 12/17/2023 1:12 PM, Brian Hunt wrote:

I’ve discovered that it’s easier to see a very weak signal on the
waterfall than in the amplitude plot. Setting the SVGA screen for 25%
spectrum and 75% waterfall gives lots of space to see dim traces. You
may have to adjust the threshold a bit.


YES! The settings I've described will optimize that visibility in the 
waterfall. Increasing the time in the waterfall to the max, especially 
with the SVGA (about 2 minutes), is great help in finding empty spots to 
call CQ in a contest, and to find running (CQing) stations to work.


73, Jim K9YC
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Re: [Elecraft] P3

[Brian Hunt]

Hi Jim,
I’ve discovered that it’s easier to see a very weak signal on the waterfall 
than in the amplitude plot. Setting the SVGA screen for 25% spectrum and 75% 
waterfall gives lots of space to see dim traces. You may have to adjust the 
threshold a bit. 

73,
Brian, K0DTJ

> On Dec 17, 2023, at 12:13, Fred Jensen  wrote:
> 
> Can't speak to the K3s, but the K3 required a modification to the 1st IF [8 
> MHz] gain for my P3 to show weaker signals.  It was just a resistor change.
> 
> 73,
> 
> Fred ["Skip"] K6DGW
> Sparks NV DM09dn
> Washoe County
> 
> Jim Murray via Elecraft wrote on 12/17/2023 12:05 PM:
>> Hello all,  Having acquired a fully loaded K3s fairly recently I am behind 
>> the curve of those fortunate enough to have a K4.  Its taken several weeks 
>> to get a decent handle on the K3s and now on to the P3.  I have all the 
>> manuals including Fred Cadys K3s and P3.  I find the K3s to be excellent and 
>> pretty remarkable compared to the many other transceivers I've owned over 
>> nearly 50 years.  The P3 has the vga board and is connected up.  All is well 
>> Except;  weak signals do not show up on the P3.  I can hear a rather weak 
>> signal but nothing at that point on the P3.  My thought is at this point the 
>> P3 is not doing me much good looking for a weak dx signal.  I have to think 
>> I have something not set up right etc..  Any help on what I'm missing would 
>> be appreciated.Thanks,Jimk2hn
>> 
> 
> 
> 
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Re: [Elecraft] P3

[Jim Brown]

On 12/17/2023 12:05 PM, Jim Murray via Elecraft wrote:

  My thought is at this point the P3 is not doing me much good looking
for a weak dx signal.  I have to think I have something not set up right
  etc..


What is required is careful (and ongoing) adjustment of P3 controls. For 
everyday operation, I set the display range to 32 dB, set Averaging to 
max (20), and adjust the noise floor to the bottom of the display. The 
first two adjustments are more or less set and forget; the noise floor 
will change from day to day and from band to band. On CW and RTTY, I 
typically use display widths of 50 to 100 kHz, or whatever covers the 
activity; on SSB, I usually set it to the 200 kHz max. In both cases, 
setting the center so that I'm seeing that activity.


What Averaging does is cause random noise to cancel, but causing signals 
to be reinforced. Averaging is the power tool that lets us see weak 
signals. Averaging also emphasizes electronic noise, that's acting like 
miniature radio transmitters. It's also important to set the P3 so that 
the frequency limits of the display remain fixed as we tune the band; if 
we set it to always be centered, averaging will re-start as we tune, 
rendering it useless.


If I'm going for very weak signals on a quiet band, I'll change that 32 
dB display range to 24 dB; in a contest, with lots of big signals, to 42 
dB.


I do NOT recommend averaging of the waterfall itself.

These applications notes on different topics include P3 and P3/SVGA 
screen grabs. The first two are "on-the-air;" the third was done in my 
shack, looking at the bandwidth of various rigs and amps. If you know 
what you're doing, the P3 and P3/SVGA are very good test instruments, 
that are with respect to frequency resolution, far superior to HP 
spectrum analyzers!


http://k9yc.com/K6XXAmpTalk.pdf

http://k9yc.com/KillingReceiveNoise.pdf

http://k9yc.com/P3_Spectrum_Measurements.pdf

73, Jim K9YC






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Re: [Elecraft] P3

[Fred Jensen]

Can't speak to the K3s, but the K3 required a modification to the 1st IF 
[8 MHz] gain for my P3 to show weaker signals.  It was just a resistor 
change.


73,

Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

Jim Murray via Elecraft wrote on 12/17/2023 12:05 PM:

Hello all,  Having acquired a fully loaded K3s fairly recently I am behind the 
curve of those fortunate enough to have a K4.  Its taken several weeks to get a 
decent handle on the K3s and now on to the P3.  I have all the manuals 
including Fred Cadys K3s and P3.  I find the K3s to be excellent and pretty 
remarkable compared to the many other transceivers I've owned over nearly 50 
years.  The P3 has the vga board and is connected up.  All is well Except;  
weak signals do not show up on the P3.  I can hear a rather weak signal but 
nothing at that point on the P3.  My thought is at this point the P3 is not 
doing me much good looking for a weak dx signal.  I have to think I have 
something not set up right etc..  Any help on what I'm missing would be 
appreciated.Thanks,Jimk2hn





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Re: [Elecraft] P3 question

[Richard Hill]

I'm new to my recently set up, 10 year old, P3.  Not one of the hotshots
here, grin.

I see a green center line on my P3 at the moment with an additional green A
line and a magenta B line.  When I turn the big knob on the K3, both A and
B lines move away from the green center line as the new center of the view
changes.  The center line remains constant.

Is that what you are seeing?

Rich
NU6T

On Tue, May 2, 2023 at 2:08 PM ROBERT GARCEAU  wrote:

> I must have something set incorrectly.When I turn the VFO A knob MRK B
> moves as I turn the main knob.
> Bob, W1EQ
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Re: [Elecraft] P3 error

[Alan Bloom]

It's the MENU:CenterEn function.  When OFF, the center key does not 
adjust the center frequency when in tracking mode.


Alan N1AL


On 4/25/23 08:06, ROBERT GARCEAU wrote:

When i press the Center button on my P3, I get a "center key disabled" message.
I have been trying to find the problem. No success.
Bob, W1EQ
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Re: [Elecraft] [P3] P3 woes - repaired but now claims my K3s puts out 873W!

[Fred Jensen]

It's always seemed to me that Poynting's Vector is the most aptly named 
entity in mathematics.


73,

Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

Edward Mccann wrote on 4/7/2023 7:41 PM:

Dave:

You may have redefined Poynting’s Theorem!

Ed McCann


On Apr 7, 2023, at 6:23 PM, Dave New, N8SBE  wrote:

Don,

The KPA500 (and K3s) both show the correct wattage - 100W barefoot and about 
26W out of the K3s when the KPA500 is inline, and about 500W out of the KPA500.

I tried changing the P3 SensorCal value from 500 (default) to 350 (min) but 
that only dropped the wattage shown by a little less than half.

73,
-- Dave, N8SBE


On 2023-04-07 16:48, W3FPR wrote:
Dave,
What power is displayed on the KPA500?  The KPA500 would fault if
indeed the K3s is putting out that much power.  The KPA500 power bar
is pretty accurate, just a bit coarse in its increments.
I think a power calibration is in order for the P3 power indicator.
73,
Don W3FPR

On 4/7/2023 2:12 PM, Dave New, N8SBE wrote:
So, I was the guy that had a P3 display/boot problem recently.
I sent it to the mother ship for repair, and they found that (get this) the 12V 
supply was shorted to the 3.3V supply (eep!).
So, a new(er) I/O board (which contains the supplies) and a replacement blown 
3.3V LCD controller later, I have an (almost) fully functional P3 again.
EXCEPT, the TX Monitor function is now funky.  It claims that my K3s is putting 
out 873 (or so) watts!  I've tried both sensors (I had a 200W HF sensor on the 
shelf since I added a KPA500 and changed to a 2KW HF sensor), and although the 
scale max changes on the P3 display when I change sensors, it still way 
overstates my output power.  The KPA500 is showing 1360 watts on the P3!
I unplugged/re-plugged everything, did a visual inspection of the TX Monitor 
adapter board under a lighted magnifying glass, looking for missing/broken SMD 
resistors or caps, but so far no soap.
I'm wondering if the new revision I/O board is somehow incompatible with the 
older TX Monitor board, or maybe there is a missing 1M-ohm resistor to ground 
on the I/O board at the sensor connector, or an incorrect series resistor value 
there.
And yes, I sent a note to support, but I haven't heard back, yet. Wondering if 
anyone (Alan?) has any ideas where this behavior is coming from.  The wattmeter 
in both my K3s and KPA500 are working normally.  It's just the P3 wattmeter 
that's gone off the deep end, now.
Thanks, and 73,
-- Dave, N8SBE
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Re: [Elecraft] [P3] P3 woes - repaired but now claims my K3s puts out 873W!

[a******@sbcglobal]

Wait, shouldn’t the sensor be before the antenna tuner? I don’t think a sensor 
should be connected where it’s not 50 ohms. 

Al  W6LX/4



> On Apr 7, 2023, at 9:22 PM, Dave New, N8SBE  wrote:
> 
> Alan,
> 
> I tried changing the SensorCal entry, but you are correct there isn't enough 
> range.  It only cut the reading by less than half.
> 
> When I change the MtrScale entry, it changes the meter scale, but it still 
> shows over 800W (and runs over the smaller scales) in text on the screen.
> 
> I did a visual inspection of the sensor board, but without a schematic I 
> couldn't check the resistor and capacitor values.  I couldn't find a 
> schematic for the P3 TX Mon sensor board.  Do you have one handy?  I did find 
> schematics for the sensors themselves in the W2 documentation.
> 
> And yes, the SWR is way low, about 1.5, compared to what my KAT500 shows for 
> the antenna side of the tuner (I have one of those display boxes on the 
> KAT500, so I can see all the tuner values).  I have the P3 sensor between my 
> KAT500 and the antenna feedline using a short coax jumper between the KAT500 
> and the sensor, which is currently going to a 75 ft coax run to a ZS6BKW 
> window-line fed dipole in an inverted vee configuration.  In the past, I've 
> seen 'raw' SWR of 2.5 to 4:1 or so on 80m in particular.  On 40m right now, I 
> have 2.93 antenna SWR shown on the KAT500, which is corrected to 1.18 SWR 
> reflected back to the KPA500 or the K3s if the KPA500 is in bypass mode.  
> Given my setup, the P3 SWR should agree closely with the KAT500 antenna-side 
> SWR, but it is about half.
> 
> 73,
> -- Dave, N8SBE
> 
>> On 2023-04-07 17:15, Alan Bloom wrote:
>> Hi Dave,
>> There is a "SensorCal" entry in the Transmit Monitor Menu, but I don't
>> think it has enough range to correct such a large error.
>> There is also a "MtrScale" entry to set the full-scale power on the
>> meter display.  Does the reading change when you change the scale?
>> In addition to the I/O board, the problem could also be on the Sensor
>> board (the small board that connects the sensor RJ45 connector to the
>> I/O board).  If one of the resistors on this board went open or
>> shorted it could cause a power error.  Is the reverse power reading
>> way off as well?  (i.e. does the SWR read wrong for SWR not close to
>> 1:1?)  If so, that could be due to a resistor problem on the Sensor
>> board.
>>> I'm wondering if the new revision I/O board is somehow incompatible with 
>>> the older TX Monitor board,
>> No I don't think so.  There was a minor change in the sensor design at
>> one point but it was just a capacitor change to improve the detected
>> bandwidth so the envelope would display correctly.  (The same sensors
>> are used for the W2 wattmeter.)
>> 73,
>> Alan N1AL
>>> On 4/7/23 12:12, Dave New, N8SBE wrote:
>>> So, I was the guy that had a P3 display/boot problem recently.
>>> I sent it to the mother ship for repair, and they found that (get this) the 
>>> 12V supply was shorted to the 3.3V supply (eep!).
>>> So, a new(er) I/O board (which contains the supplies) and a replacement 
>>> blown 3.3V LCD controller later, I have an (almost) fully functional P3 
>>> again.
>>> EXCEPT, the TX Monitor function is now funky.  It claims that my K3s is 
>>> putting out 873 (or so) watts!  I've tried both sensors (I had a 200W HF 
>>> sensor on the shelf since I added a KPA500 and changed to a 2KW HF sensor), 
>>> and although the scale max changes on the P3 display when I change sensors, 
>>> it still way overstates my output power.  The KPA500 is showing 1360 watts 
>>> on the P3!
>>> I unplugged/re-plugged everything, did a visual inspection of the TX 
>>> Monitor adapter board under a lighted magnifying glass, looking for 
>>> missing/broken SMD resistors or caps, but so far no soap.
>>> I'm wondering if the new revision I/O board is somehow incompatible with 
>>> the older TX Monitor board, or maybe there is a missing 1M-ohm resistor to 
>>> ground on the I/O board at the sensor connector, or an incorrect series 
>>> resistor value there.
>>> And yes, I sent a note to support, but I haven't heard back, yet. Wondering 
>>> if anyone (Alan?) has any ideas where this behavior is coming from.  The 
>>> wattmeter in both my K3s and KPA500 are working normally.  It's just the P3 
>>> wattmeter that's gone off the deep end, now.
>>> Thanks, and 73,
>>> -- Dave, N8SBE
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Re: [Elecraft] [P3] P3 woes - repaired but now claims my K3s puts out 873W!

[Edward Mccann]

Dave:

You may have redefined Poynting’s Theorem!

Ed McCann

> On Apr 7, 2023, at 6:23 PM, Dave New, N8SBE  wrote:
> 
> Don,
> 
> The KPA500 (and K3s) both show the correct wattage - 100W barefoot and about 
> 26W out of the K3s when the KPA500 is inline, and about 500W out of the 
> KPA500.
> 
> I tried changing the P3 SensorCal value from 500 (default) to 350 (min) but 
> that only dropped the wattage shown by a little less than half.
> 
> 73,
> -- Dave, N8SBE
> 
>> On 2023-04-07 16:48, W3FPR wrote:
>> Dave,
>> What power is displayed on the KPA500?  The KPA500 would fault if
>> indeed the K3s is putting out that much power.  The KPA500 power bar
>> is pretty accurate, just a bit coarse in its increments.
>> I think a power calibration is in order for the P3 power indicator.
>> 73,
>> Don W3FPR
>>> On 4/7/2023 2:12 PM, Dave New, N8SBE wrote:
>>> So, I was the guy that had a P3 display/boot problem recently.
>>> I sent it to the mother ship for repair, and they found that (get this) the 
>>> 12V supply was shorted to the 3.3V supply (eep!).
>>> So, a new(er) I/O board (which contains the supplies) and a replacement 
>>> blown 3.3V LCD controller later, I have an (almost) fully functional P3 
>>> again.
>>> EXCEPT, the TX Monitor function is now funky.  It claims that my K3s is 
>>> putting out 873 (or so) watts!  I've tried both sensors (I had a 200W HF 
>>> sensor on the shelf since I added a KPA500 and changed to a 2KW HF sensor), 
>>> and although the scale max changes on the P3 display when I change sensors, 
>>> it still way overstates my output power.  The KPA500 is showing 1360 watts 
>>> on the P3!
>>> I unplugged/re-plugged everything, did a visual inspection of the TX 
>>> Monitor adapter board under a lighted magnifying glass, looking for 
>>> missing/broken SMD resistors or caps, but so far no soap.
>>> I'm wondering if the new revision I/O board is somehow incompatible with 
>>> the older TX Monitor board, or maybe there is a missing 1M-ohm resistor to 
>>> ground on the I/O board at the sensor connector, or an incorrect series 
>>> resistor value there.
>>> And yes, I sent a note to support, but I haven't heard back, yet. Wondering 
>>> if anyone (Alan?) has any ideas where this behavior is coming from.  The 
>>> wattmeter in both my K3s and KPA500 are working normally.  It's just the P3 
>>> wattmeter that's gone off the deep end, now.
>>> Thanks, and 73,
>>> -- Dave, N8SBE
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Re: [Elecraft] [P3] P3 woes - repaired but now claims my K3s puts out 873W!

[Dave New, N8SBE]

Don,

The KPA500 (and K3s) both show the correct wattage - 100W barefoot and 
about 26W out of the K3s when the KPA500 is inline, and about 500W out 
of the KPA500.


I tried changing the P3 SensorCal value from 500 (default) to 350 (min) 
but that only dropped the wattage shown by a little less than half.


73,
-- Dave, N8SBE

On 2023-04-07 16:48, W3FPR wrote:

Dave,

What power is displayed on the KPA500?  The KPA500 would fault if
indeed the K3s is putting out that much power.  The KPA500 power bar
is pretty accurate, just a bit coarse in its increments.

I think a power calibration is in order for the P3 power indicator.

73,
Don W3FPR

On 4/7/2023 2:12 PM, Dave New, N8SBE wrote:

So, I was the guy that had a P3 display/boot problem recently.

I sent it to the mother ship for repair, and they found that (get 
this) the 12V supply was shorted to the 3.3V supply (eep!).
So, a new(er) I/O board (which contains the supplies) and a 
replacement blown 3.3V LCD controller later, I have an (almost) fully 
functional P3 again.


EXCEPT, the TX Monitor function is now funky.  It claims that my K3s 
is putting out 873 (or so) watts!  I've tried both sensors (I had a 
200W HF sensor on the shelf since I added a KPA500 and changed to a 
2KW HF sensor), and although the scale max changes on the P3 display 
when I change sensors, it still way overstates my output power.  The 
KPA500 is showing 1360 watts on the P3!


I unplugged/re-plugged everything, did a visual inspection of the TX 
Monitor adapter board under a lighted magnifying glass, looking for 
missing/broken SMD resistors or caps, but so far no soap.


I'm wondering if the new revision I/O board is somehow incompatible 
with the older TX Monitor board, or maybe there is a missing 1M-ohm 
resistor to ground on the I/O board at the sensor connector, or an 
incorrect series resistor value there.


And yes, I sent a note to support, but I haven't heard back, yet. 
Wondering if anyone (Alan?) has any ideas where this behavior is 
coming from.  The wattmeter in both my K3s and KPA500 are working 
normally.  It's just the P3 wattmeter that's gone off the deep end, 
now.


Thanks, and 73,
-- Dave, N8SBE
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Re: [Elecraft] [P3] P3 woes - repaired but now claims my K3s puts out 873W!

[Dave New, N8SBE]

Alan,

I tried changing the SensorCal entry, but you are correct there isn't 
enough range.  It only cut the reading by less than half.


When I change the MtrScale entry, it changes the meter scale, but it 
still shows over 800W (and runs over the smaller scales) in text on the 
screen.


I did a visual inspection of the sensor board, but without a schematic I 
couldn't check the resistor and capacitor values.  I couldn't find a 
schematic for the P3 TX Mon sensor board.  Do you have one handy?  I did 
find schematics for the sensors themselves in the W2 documentation.


And yes, the SWR is way low, about 1.5, compared to what my KAT500 shows 
for the antenna side of the tuner (I have one of those display boxes on 
the KAT500, so I can see all the tuner values).  I have the P3 sensor 
between my KAT500 and the antenna feedline using a short coax jumper 
between the KAT500 and the sensor, which is currently going to a 75 ft 
coax run to a ZS6BKW window-line fed dipole in an inverted vee 
configuration.  In the past, I've seen 'raw' SWR of 2.5 to 4:1 or so on 
80m in particular.  On 40m right now, I have 2.93 antenna SWR shown on 
the KAT500, which is corrected to 1.18 SWR reflected back to the KPA500 
or the K3s if the KPA500 is in bypass mode.  Given my setup, the P3 SWR 
should agree closely with the KAT500 antenna-side SWR, but it is about 
half.


73,
-- Dave, N8SBE

On 2023-04-07 17:15, Alan Bloom wrote:

Hi Dave,

There is a "SensorCal" entry in the Transmit Monitor Menu, but I don't
think it has enough range to correct such a large error.

There is also a "MtrScale" entry to set the full-scale power on the
meter display.  Does the reading change when you change the scale?

In addition to the I/O board, the problem could also be on the Sensor
board (the small board that connects the sensor RJ45 connector to the
I/O board).  If one of the resistors on this board went open or
shorted it could cause a power error.  Is the reverse power reading
way off as well?  (i.e. does the SWR read wrong for SWR not close to
1:1?)  If so, that could be due to a resistor problem on the Sensor
board.

I'm wondering if the new revision I/O board is somehow incompatible 
with the older TX Monitor board,


No I don't think so.  There was a minor change in the sensor design at
one point but it was just a capacitor change to improve the detected
bandwidth so the envelope would display correctly.  (The same sensors
are used for the W2 wattmeter.)

73,

Alan N1AL



On 4/7/23 12:12, Dave New, N8SBE wrote:

So, I was the guy that had a P3 display/boot problem recently.

I sent it to the mother ship for repair, and they found that (get 
this) the 12V supply was shorted to the 3.3V supply (eep!).
So, a new(er) I/O board (which contains the supplies) and a 
replacement blown 3.3V LCD controller later, I have an (almost) fully 
functional P3 again.


EXCEPT, the TX Monitor function is now funky.  It claims that my K3s 
is putting out 873 (or so) watts!  I've tried both sensors (I had a 
200W HF sensor on the shelf since I added a KPA500 and changed to a 
2KW HF sensor), and although the scale max changes on the P3 display 
when I change sensors, it still way overstates my output power.  The 
KPA500 is showing 1360 watts on the P3!


I unplugged/re-plugged everything, did a visual inspection of the TX 
Monitor adapter board under a lighted magnifying glass, looking for 
missing/broken SMD resistors or caps, but so far no soap.


I'm wondering if the new revision I/O board is somehow incompatible 
with the older TX Monitor board, or maybe there is a missing 1M-ohm 
resistor to ground on the I/O board at the sensor connector, or an 
incorrect series resistor value there.


And yes, I sent a note to support, but I haven't heard back, yet. 
Wondering if anyone (Alan?) has any ideas where this behavior is 
coming from.  The wattmeter in both my K3s and KPA500 are working 
normally.  It's just the P3 wattmeter that's gone off the deep end, 
now.


Thanks, and 73,
-- Dave, N8SBE
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Re: [Elecraft] [P3] P3 woes - repaired but now claims my K3s puts out 873W!

[Dave New, N8SBE]

Dave,
Yes, it is at 500 which is the default, and I've used it at the setting 
for the past 13 years.


I tried changing it to 350 which is the minimum, and it now shows about 
440W, so that seems about right for 350/500 * 873W.
But it seems there isn't enough range to pull it in to 100W, so I don't 
think that is the problem.


73,
-- Dave, N8SBE

On 2023-04-07 16:39, Dave (NK7Z) wrote:

Have you looked at the calibration setting in it yet?  Not sure if it
can pull it that far, but that may be what is off.

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 4/7/23 11:12, Dave New, N8SBE wrote:

So, I was the guy that had a P3 display/boot problem recently.

I sent it to the mother ship for repair, and they found that (get 
this) the 12V supply was shorted to the 3.3V supply (eep!).
So, a new(er) I/O board (which contains the supplies) and a 
replacement blown 3.3V LCD controller later, I have an (almost) fully 
functional P3 again.


EXCEPT, the TX Monitor function is now funky.  It claims that my K3s 
is putting out 873 (or so) watts!  I've tried both sensors (I had a 
200W HF sensor on the shelf since I added a KPA500 and changed to a 
2KW HF sensor), and although the scale max changes on the P3 display 
when I change sensors, it still way overstates my output power.  The 
KPA500 is showing 1360 watts on the P3!


I unplugged/re-plugged everything, did a visual inspection of the TX 
Monitor adapter board under a lighted magnifying glass, looking for 
missing/broken SMD resistors or caps, but so far no soap.


I'm wondering if the new revision I/O board is somehow incompatible 
with the older TX Monitor board, or maybe there is a missing 1M-ohm 
resistor to ground on the I/O board at the sensor connector, or an 
incorrect series resistor value there.


And yes, I sent a note to support, but I haven't heard back, yet. 
Wondering if anyone (Alan?) has any ideas where this behavior is 
coming from.  The wattmeter in both my K3s and KPA500 are working 
normally. It's just the P3 wattmeter that's gone off the deep end, 
now.


Thanks, and 73,
-- Dave, N8SBE
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Re: [Elecraft] [P3] P3 woes - repaired but now claims my K3s puts out 873W!

[Alan Bloom]

Hi Dave,

There is a "SensorCal" entry in the Transmit Monitor Menu, but I don't 
think it has enough range to correct such a large error.


There is also a "MtrScale" entry to set the full-scale power on the 
meter display.  Does the reading change when you change the scale?


In addition to the I/O board, the problem could also be on the Sensor 
board (the small board that connects the sensor RJ45 connector to the 
I/O board).  If one of the resistors on this board went open or shorted 
it could cause a power error.  Is the reverse power reading way off as 
well?  (i.e. does the SWR read wrong for SWR not close to 1:1?)  If so, 
that could be due to a resistor problem on the Sensor board.


> I'm wondering if the new revision I/O board is somehow incompatible 
with the older TX Monitor board,


No I don't think so.  There was a minor change in the sensor design at 
one point but it was just a capacitor change to improve the detected 
bandwidth so the envelope would display correctly.  (The same sensors 
are used for the W2 wattmeter.)


73,

Alan N1AL



On 4/7/23 12:12, Dave New, N8SBE wrote:

So, I was the guy that had a P3 display/boot problem recently.

I sent it to the mother ship for repair, and they found that (get 
this) the 12V supply was shorted to the 3.3V supply (eep!).
So, a new(er) I/O board (which contains the supplies) and a 
replacement blown 3.3V LCD controller later, I have an (almost) fully 
functional P3 again.


EXCEPT, the TX Monitor function is now funky.  It claims that my K3s 
is putting out 873 (or so) watts!  I've tried both sensors (I had a 
200W HF sensor on the shelf since I added a KPA500 and changed to a 
2KW HF sensor), and although the scale max changes on the P3 display 
when I change sensors, it still way overstates my output power.  The 
KPA500 is showing 1360 watts on the P3!


I unplugged/re-plugged everything, did a visual inspection of the TX 
Monitor adapter board under a lighted magnifying glass, looking for 
missing/broken SMD resistors or caps, but so far no soap.


I'm wondering if the new revision I/O board is somehow incompatible 
with the older TX Monitor board, or maybe there is a missing 1M-ohm 
resistor to ground on the I/O board at the sensor connector, or an 
incorrect series resistor value there.


And yes, I sent a note to support, but I haven't heard back, yet. 
Wondering if anyone (Alan?) has any ideas where this behavior is 
coming from.  The wattmeter in both my K3s and KPA500 are working 
normally.  It's just the P3 wattmeter that's gone off the deep end, now.


Thanks, and 73,
-- Dave, N8SBE
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Re: [Elecraft] [P3] P3 woes - repaired but now claims my K3s puts out 873W!

[W3FPR]

Dave,

What power is displayed on the KPA500?  The KPA500 would fault if indeed 
the K3s is putting out that much power.  The KPA500 power bar is pretty 
accurate, just a bit coarse in its increments.


I think a power calibration is in order for the P3 power indicator.

73,
Don W3FPR

On 4/7/2023 2:12 PM, Dave New, N8SBE wrote:

So, I was the guy that had a P3 display/boot problem recently.

I sent it to the mother ship for repair, and they found that (get 
this) the 12V supply was shorted to the 3.3V supply (eep!).
So, a new(er) I/O board (which contains the supplies) and a 
replacement blown 3.3V LCD controller later, I have an (almost) fully 
functional P3 again.


EXCEPT, the TX Monitor function is now funky.  It claims that my K3s 
is putting out 873 (or so) watts!  I've tried both sensors (I had a 
200W HF sensor on the shelf since I added a KPA500 and changed to a 
2KW HF sensor), and although the scale max changes on the P3 display 
when I change sensors, it still way overstates my output power.  The 
KPA500 is showing 1360 watts on the P3!


I unplugged/re-plugged everything, did a visual inspection of the TX 
Monitor adapter board under a lighted magnifying glass, looking for 
missing/broken SMD resistors or caps, but so far no soap.


I'm wondering if the new revision I/O board is somehow incompatible 
with the older TX Monitor board, or maybe there is a missing 1M-ohm 
resistor to ground on the I/O board at the sensor connector, or an 
incorrect series resistor value there.


And yes, I sent a note to support, but I haven't heard back, yet. 
Wondering if anyone (Alan?) has any ideas where this behavior is 
coming from.  The wattmeter in both my K3s and KPA500 are working 
normally.  It's just the P3 wattmeter that's gone off the deep end, now.


Thanks, and 73,
-- Dave, N8SBE
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Re: [Elecraft] [P3] P3 woes - repaired but now claims my K3s puts out 873W!

[Dave (NK7Z)]

Have you looked at the calibration setting in it yet?  Not sure if it 
can pull it that far, but that may be what is off.


73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 4/7/23 11:12, Dave New, N8SBE wrote:

So, I was the guy that had a P3 display/boot problem recently.

I sent it to the mother ship for repair, and they found that (get this) 
the 12V supply was shorted to the 3.3V supply (eep!).
So, a new(er) I/O board (which contains the supplies) and a replacement 
blown 3.3V LCD controller later, I have an (almost) fully functional P3 
again.


EXCEPT, the TX Monitor function is now funky.  It claims that my K3s is 
putting out 873 (or so) watts!  I've tried both sensors (I had a 200W HF 
sensor on the shelf since I added a KPA500 and changed to a 2KW HF 
sensor), and although the scale max changes on the P3 display when I 
change sensors, it still way overstates my output power.  The KPA500 is 
showing 1360 watts on the P3!


I unplugged/re-plugged everything, did a visual inspection of the TX 
Monitor adapter board under a lighted magnifying glass, looking for 
missing/broken SMD resistors or caps, but so far no soap.


I'm wondering if the new revision I/O board is somehow incompatible with 
the older TX Monitor board, or maybe there is a missing 1M-ohm resistor 
to ground on the I/O board at the sensor connector, or an incorrect 
series resistor value there.


And yes, I sent a note to support, but I haven't heard back, yet. 
Wondering if anyone (Alan?) has any ideas where this behavior is coming 
from.  The wattmeter in both my K3s and KPA500 are working normally. 
It's just the P3 wattmeter that's gone off the deep end, now.


Thanks, and 73,
-- Dave, N8SBE
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Re: [Elecraft] [P3] P3 woes - internal display inop

[Dave New, N8SBE]

Alan,

Looks like I'll have to pack it up and send it in.

Thanks, Alan, for all your help and suggestions.

73,
-- Dave, N8SBE

On 2023-02-27 21:14, Alan Bloom wrote:

Hi Dave,


The internal display comes on briefly, then the P3 powers down. ...



And no, I can't contact it via the utility anymore.


So it sounds like the CPU comes on briefly at power up but then turns 
off.


There is a power-fail interrupt in the Microchip dsPIC33 CPU. Perhaps
the +3.3V supply is not stable at power-up for some reason.

Actually, at this point it's really hard to troubleshoot without
seeing the unit.  If you send it in to Elecraft for repair, the
service tech could try swapping PC boards to isolate the problem. For
example, if a new rear-panel I/O board fixes it, then it is probably a
power supply problem.

So at this point, sending it in is probably the best option.  You can
send an email to k3supp...@elecraft.com to explain the problem and get
a return authorization.

Good luck!

73,

Alan N1AL

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Re: [Elecraft] [P3] P3 woes - internal display inop

[Dave New, N8SBE]

Alan,

Moving the jumper to 1-2 doesn't change the behavior.  The internal 
display comes on briefly,
then the P3 powers down.  I've tried it in all 3 positions, and the 
behavior is the same

whenever the P3 attempts to power on.

And no, I can't contact it via the utility anymore.  The most recent 
time I did manage to contact it
was when the external display was running.  Now neither display works, 
except the internal one for

about a second or so.

I notice that the red LED on the display PCB no longer comes on, either, 
now that I have the lid off of the P3.


73,

-- Dave, N8SBE

On 2023-02-26 14:53, Alan Bloom wrote:

By the way, I no longer have a K3 or P3 (lost in a house fire) so this
is from memory...


Since the internal display seems to show OK, no matter how briefly,
I'm thinking this is not an internal display connection issue.


Agreed.


This seems to be a power on reset issue of some sort.


Can you send/receive RS-232 commands to the P3?  If so, then the power
must be on.

If you haven't already, I would try moving the power-on jumper (on the
rear-panel I/O board at the back of the P3) to the "always on"
position (jumper pins 1 and 2).

I take it that the 3.3V supply is 'on' as long as 12V external is 
supplied to the P3?


No, it's only on when the P3 is on.

What happens is that when the P3 CPU wakes up, one of the first things
it does is to enable the PWON signal to the I/O board which holds the
power on.  If that is not working for some reason, then moving the
power-on jumper to "always on" should force the P3 to stay on.

Alan N1AL



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Re: [Elecraft] [P3] P3 woes - internal display inop

[Dave (NK7Z)]

I believe the display board was replaced...  If I remember right, the 
test was to look at the inside of the P3, and see if the display board 
LED was flashing.  If flashing, it was OK, if not, something died... 
This has bee a few years ago, so my memory of this is no longer that 
clear...


73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 2/26/23 11:11, Dave New, N8SBE wrote:

Dave,

Any idea of what repair action they did?

73,
-- Dave, N8SBE

On 2023-02-24 14:31, Dave (NK7Z) wrote:

Hi,
I had the exact same issue, with the exact same symptoms, sent it into
Elecraft, got it back, and it worked until I sold it.

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources


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Re: [Elecraft] [P3] P3 woes - internal display inop

[Alan Bloom]

By the way, I no longer have a K3 or P3 (lost in a house fire) so this 
is from memory...


> Since the internal display seems to show OK, no matter how briefly,
> I'm thinking this is not an internal display connection issue.

Agreed.

> This seems to be a power on reset issue of some sort.

Can you send/receive RS-232 commands to the P3?  If so, then the power 
must be on.


If you haven't already, I would try moving the power-on jumper (on the 
rear-panel I/O board at the back of the P3) to the "always on" position 
(jumper pins 1 and 2).


> I take it that the 3.3V supply is 'on' as long as 12V external is 
supplied to the P3?


No, it's only on when the P3 is on.

What happens is that when the P3 CPU wakes up, one of the first things 
it does is to enable the PWON signal to the I/O board which holds the 
power on.  If that is not working for some reason, then moving the 
power-on jumper to "always on" should force the P3 to stay on.


Alan N1AL




On 2/26/23 12:22, Dave New, N8SBE wrote:

Alan,

Before I got the chance to look into your idea of possibly bad display 
connection,
I DID reload a saved configuration into the P3 using the P3 Utility, 
and it restored

the high-res setting on the external display.

After power cycling (the generator quit unexpectedly due to a low oil 
sensor),
now I can't get the external display on at all, but interestingly, the 
internal
display comes up briefly with the P3 Boot Loader and Checksum Test 
messages, and
if it's been a while since I've tried to power up, I get a brief 
spectrum display
with the message, Waiting for SVGA, then it goes blank, apparently 
with an internal
power fail, since every time I push the Power button, I get the same 
sequence.


Since the internal display seems to show OK, no matter how briefly, 
I'm thinking this

is not an internal display connection issue.

This seems to be a power on reset issue of some sort.  I note from the 
schematic that
that Power button feeds SW_ON which is tied to INT4/A15 on the PIC33F 
chip.  I'm assuming
the PIC has that pin programmed for INT4, so pushing the Power button 
is 'waking up' the PIC33F
with INT4, and it goes partially through the start up, and then fails 
apparently failing to

latch 'on' from the momentary push button press.

I take it that the 3.3V supply is 'on' as long as 12V external is 
supplied to the P3?


Thanks,
-- Dave, N8SBE

On 2023-02-24 13:23, Alan Bloom wrote:

Hi Dave,

Another possibility is that perhaps one of the display connectors has
come loose or is making a bad connection.

I normally wouldn't recommend this since these tiny connectors are
kind of tricky, but since the P3 isn't working anyway, there's nothing
to lose.

There are two surface-mount connectors located underneath the display
on the front-panel board: a 4-pin connector for the display backlight
and a 40-pin connector for the rest of the display electronics.

To access them, remove the front-panel board from the P3 and then
remove the LCD display by gently prying it free from the rubber
holder.  Be careful so as not to put stress on the flex circuits going
to the two connectors.

Examine each of the connectors to see if it looks like the flex
circuits are properly seated in them.  To re-seat one, open the
connector by using a fingernail to pop open the top.  After
re-positioning the flex circuit, press the connector top down again
until it clicks.

As I say, this is a rather delicate operation (which is why the front
panel came pre-assembled in P3 kits).  So you might want to consider
sending the P3 in for service and let the experienced Elecraft techs
handle it.

Alan N1AL



On 2/24/23 10:51, Dave New, N8SBE wrote:

Mike,

Thanks for the idea!  I hadn't considered that mitigation.

Anyone else have ideas for a permanent corrective action?

73,
-- Dave, N8SBE

On 2023-02-24 09:13, Mike Flowers wrote:

Hi Dave,

If you have a way of sending P3 control commands to the P3, there 
may be a

chance that you could the resolution of the external display set to a
useable value.

I've attached my copy of the P3 Programmer's Reference.

- 73 and good DX de Mike, K6MKF, NCDXC Life Member



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Re: [Elecraft] [P3] P3 woes - internal display inop

[Dave New, N8SBE]

Alan,

Before I got the chance to look into your idea of possibly bad display 
connection,
I DID reload a saved configuration into the P3 using the P3 Utility, and 
it restored

the high-res setting on the external display.

After power cycling (the generator quit unexpectedly due to a low oil 
sensor),
now I can't get the external display on at all, but interestingly, the 
internal
display comes up briefly with the P3 Boot Loader and Checksum Test 
messages, and
if it's been a while since I've tried to power up, I get a brief 
spectrum display
with the message, Waiting for SVGA, then it goes blank, apparently with 
an internal
power fail, since every time I push the Power button, I get the same 
sequence.


Since the internal display seems to show OK, no matter how briefly, I'm 
thinking this

is not an internal display connection issue.

This seems to be a power on reset issue of some sort.  I note from the 
schematic that
that Power button feeds SW_ON which is tied to INT4/A15 on the PIC33F 
chip.  I'm assuming
the PIC has that pin programmed for INT4, so pushing the Power button is 
'waking up' the PIC33F
with INT4, and it goes partially through the start up, and then fails 
apparently failing to

latch 'on' from the momentary push button press.

I take it that the 3.3V supply is 'on' as long as 12V external is 
supplied to the P3?


Thanks,
-- Dave, N8SBE

On 2023-02-24 13:23, Alan Bloom wrote:

Hi Dave,

Another possibility is that perhaps one of the display connectors has
come loose or is making a bad connection.

I normally wouldn't recommend this since these tiny connectors are
kind of tricky, but since the P3 isn't working anyway, there's nothing
to lose.

There are two surface-mount connectors located underneath the display
on the front-panel board: a 4-pin connector for the display backlight
and a 40-pin connector for the rest of the display electronics.

To access them, remove the front-panel board from the P3 and then
remove the LCD display by gently prying it free from the rubber
holder.  Be careful so as not to put stress on the flex circuits going
to the two connectors.

Examine each of the connectors to see if it looks like the flex
circuits are properly seated in them.  To re-seat one, open the
connector by using a fingernail to pop open the top.  After
re-positioning the flex circuit, press the connector top down again
until it clicks.

As I say, this is a rather delicate operation (which is why the front
panel came pre-assembled in P3 kits).  So you might want to consider
sending the P3 in for service and let the experienced Elecraft techs
handle it.

Alan N1AL



On 2/24/23 10:51, Dave New, N8SBE wrote:

Mike,

Thanks for the idea!  I hadn't considered that mitigation.

Anyone else have ideas for a permanent corrective action?

73,
-- Dave, N8SBE

On 2023-02-24 09:13, Mike Flowers wrote:

Hi Dave,

If you have a way of sending P3 control commands to the P3, there may 
be a

chance that you could the resolution of the external display set to a
useable value.

I've attached my copy of the P3 Programmer's Reference.

- 73 and good DX de Mike, K6MKF, NCDXC Life Member



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Re: [Elecraft] [P3] P3 woes - internal display inop

[Dave New, N8SBE]

Dave,

Any idea of what repair action they did?

73,
-- Dave, N8SBE

On 2023-02-24 14:31, Dave (NK7Z) wrote:

Hi,
I had the exact same issue, with the exact same symptoms, sent it into
Elecraft, got it back, and it worked until I sold it.

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources


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Re: [Elecraft] [P3] P3 woes - internal display inop

[Dave (NK7Z)]

Hi,
I had the exact same issue, with the exact same symptoms, sent it into 
Elecraft, got it back, and it worked until I sold it.


73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 2/24/23 07:05, Dave New, N8SBE wrote:

Well my 10+ yr old P3 seems to have finally bit the dust.

I had been having issues with getting the internal display to turn on 
when powering the P3 up.


I had found that by letting it run for a minute or so (the external 
display always worked), that I could then quickly cycle the power button 
off/on and get the internal display to come on.


I tended to leave the K3s and P3 on all the time, just because it had 
become a PITA to deal with this behavior.


I had posted about this previously, and had a couple of possible 
suggestions:


1) Power it from the main station supply, instead of the K3s - tried 
with no discernable change in behavior.
2) Open it up and unplug/re-plug all the cables, etc. to clean the 
contacts - tried with no discernable change in behavior.


So, we had a power outage a couple of evenings ago, and that seems to 
have finally screwed the pooch.


I can no longer get the internal display on at all.
Only through some fiddling with the P3 power button can I get the 
external display to come up.
When the external display comes up, it seems that the P3 is operating in 
a factory default condition.
The resolution is low, it is in center tracking mode (which I never 
use), etc.
The most annoying aspect of this is that I cannot see the menu which 
shows initially on the internal display, so I cannot reset the external 
display resolution, etc.


Any more ideas/help for this, or do I have to pack it up and send to the 
mother ship for repair, only to have to wait for ever because of parts 
shortages?


I really miss my SVGA waterfall display.

73,
-- Dave, N8SBE
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Re: [Elecraft] [P3] P3 woes - internal display inop

[Dave New, N8SBE]

Thanks Alan,

I'll take a look-see this weekend and see if it's something I can 
tackle.


I've recently dealt with tiny flex connectors like that on another 
project,

and it survived. :-)

I'll be sure to come back here and report my findings.

73,
-- Dave, N8SBE

On 2023-02-24 13:23, Alan Bloom wrote:

Hi Dave,

Another possibility is that perhaps one of the display connectors has
come loose or is making a bad connection.

I normally wouldn't recommend this since these tiny connectors are
kind of tricky, but since the P3 isn't working anyway, there's nothing
to lose.

There are two surface-mount connectors located underneath the display
on the front-panel board: a 4-pin connector for the display backlight
and a 40-pin connector for the rest of the display electronics.

To access them, remove the front-panel board from the P3 and then
remove the LCD display by gently prying it free from the rubber
holder.  Be careful so as not to put stress on the flex circuits going
to the two connectors.

Examine each of the connectors to see if it looks like the flex
circuits are properly seated in them.  To re-seat one, open the
connector by using a fingernail to pop open the top.  After
re-positioning the flex circuit, press the connector top down again
until it clicks.

As I say, this is a rather delicate operation (which is why the front
panel came pre-assembled in P3 kits).  So you might want to consider
sending the P3 in for service and let the experienced Elecraft techs
handle it.

Alan N1AL




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Re: [Elecraft] [P3] P3 woes - internal display inop

[Alan Bloom]

Hi Dave,

Another possibility is that perhaps one of the display connectors has 
come loose or is making a bad connection.


I normally wouldn't recommend this since these tiny connectors are kind 
of tricky, but since the P3 isn't working anyway, there's nothing to lose.


There are two surface-mount connectors located underneath the display on 
the front-panel board: a 4-pin connector for the display backlight and a 
40-pin connector for the rest of the display electronics.


To access them, remove the front-panel board from the P3 and then remove 
the LCD display by gently prying it free from the rubber holder.  Be 
careful so as not to put stress on the flex circuits going to the two 
connectors.


Examine each of the connectors to see if it looks like the flex circuits 
are properly seated in them.  To re-seat one, open the connector by 
using a fingernail to pop open the top.  After re-positioning the flex 
circuit, press the connector top down again until it clicks.


As I say, this is a rather delicate operation (which is why the front 
panel came pre-assembled in P3 kits).  So you might want to consider 
sending the P3 in for service and let the experienced Elecraft techs 
handle it.


Alan N1AL



On 2/24/23 10:51, Dave New, N8SBE wrote:

Mike,

Thanks for the idea!  I hadn't considered that mitigation.

Anyone else have ideas for a permanent corrective action?

73,
-- Dave, N8SBE

On 2023-02-24 09:13, Mike Flowers wrote:

Hi Dave,

If you have a way of sending P3 control commands to the P3, there may 
be a

chance that you could the resolution of the external display set to a
useable value.

I've attached my copy of the P3 Programmer's Reference.

- 73 and good DX de Mike, K6MKF, NCDXC Life Member



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Re: [Elecraft] [P3] P3 woes - internal display inop

[Dave New, N8SBE]

Mike,

Thanks for the idea!  I hadn't considered that mitigation.

Anyone else have ideas for a permanent corrective action?

73,
-- Dave, N8SBE

On 2023-02-24 09:13, Mike Flowers wrote:

Hi Dave,

If you have a way of sending P3 control commands to the P3, there may 
be a

chance that you could the resolution of the external display set to a
useable value.

I've attached my copy of the P3 Programmer's Reference.

- 73 and good DX de Mike, K6MKF, NCDXC Life Member



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Re: [Elecraft] P3 Command set question

[W3FPR]

Joe,

The complete syntax for those commands can be found in the Programmer's 
Reference.


73,
Don W3FPR

On 2/13/2023 3:04 PM, Joe K2UF wrote:

Not sure if this the correct address for this question.  I am trying to send
cammands to the P3 and K3 from a VB,NET program.  I tried several different
attempts to send commands to the P3 and K3.  I need the exact systax for the
code to send these commands.  If this is not the correct place for this
question please let me know where I would ask this question.
  
Any help would be appreciated.
  



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Re: [Elecraft] P3 Panadapter with K2

[Geert Jan de Groot]

Does anyone know if the P3 Panadapter will work with the K2 transceiver?


It does, with a number of caveats:
- The K2 does not have an IF Out port. On my K2, I never installed the 
no-antennatuner BNC connector; I modified the connector to use a small 
coax cable (AWAY from the high RF output of the antenna circuit to avoid 
leaks) and re-purposed the BNC for "IF Out". In hindsight, perhaps I 
should have used a SMA connector and some filler rings (for the same 
hole at the back of the K2)
- You need an IF buffer amplifier. Search for "Clifton Laboratories 
Z1". The buffer amplifier comes in two versions, Z1-K2 and 
Z1-U. You want the K2 model, or get the universal model and add the 
4.915 Mhz filtering.
- The IF output is a tad low, you won't see "the bottom of the band" 
though I still found this useful
- The P3 cannot talk to the K2. Which means that there won't be 
frequencies on the P3 display, nor can you make the P3 "shift" as you 
can make the K3 do. The center will be the frequency you are receiving 
(which I consider most useful anyway), but that's what you get.
- The K2 has some BFO leakage back into the IF. For reception that does 
not matter; however for spectrum display you will find a spike in the 
center of the frequency you are receiving. There are some mods to make 
it "less" but not "gone". If you have a live band you probably won't 
notice; I was using the QO100 passband on which signals have a max 
strength of 24dB above noise and then the spike shows. I did not find it 
objectionable.


I do suggest you take some time to look up the original Clifton Z1 
documentation; it is a piece of art on the same standard as the K2 
manual if not higher. I learned quite some things by just looking at the 
documentation. It is very unfortunate that Jack is no longer with us; 
however production of the amplifier has been taken over by DX 
engineering who sells pre-built boards which seem to be of similar 
standard as the ones Jack provided.


Is it useful? Definitely! Recommended? Yes. But you should know the 
limitations, which is why my posting is more verbose.


73,

Geert Jan PE1HZG



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Re: [Elecraft] P3 Panadapter with K2

[W3FPR]

Bill,

If you add the Clifton Labs Z2 buffer amplifier (now sold by DX 
Engineering) to provide an IF output from the K2, it will work as a 
spectrum display.  It will not report the K2 VFO frequency as it does 
with the K3.


73,
Don W3FPR

On 1/24/2023 3:03 PM, William Santos via Elecraft wrote:

Does anyone know if the P3 Panadapter will work with the K2 transceiver?




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Re: [Elecraft] P3 Panadapter with K2

[Harlan Sherriff via Elecraft]

The K2 doesn’t have an IF out, unless it has been modified. Without the IF out, 
it won’t 

Sent from my iPhone

> On Jan 24, 2023, at 3:05 PM, William Santos via Elecraft 
>  wrote:
> 
> Does anyone know if the P3 Panadapter will work with the K2 transceiver?
> 
> Thanks and 73,
> 
> Bill
> KN6UDK
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Re: [Elecraft] P3 andK3

[Jim Brown]

On 8/31/2022 3:24 AM, Josep via Elecraft wrote:

How do you guys solve this.?


Study the manuals. The KUSB converts USB to RS232. For RS232, It's PC to 
P3, P3 to K3. For keying and control, go into K3 menus and configure 
keying options from the serial port. In the logging program, configure 
it to use certain lines in the serial port for keying. Study the manuals 
about these functions. The manuals are all online, it's all there.


73, Jim K9YC


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Re: [Elecraft] P3 gone BLACK

[Dave (NK7Z)]

Hi,

I had this exact problem, the problem gets worse with time...  At least 
mine did.  I sent in my P3 to Elecraft repair, and got it back a month 
or so later working...


73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 8/22/22 10:25, Dave New wrote:

  Allen,

I have this issue with my P3, and it seems to be related to internal (to 
the P3) power rail problems.


I have the SVGA adapter, and the external display always works, even if 
the P3 display isn't.


After leaving the power on for a minute or less, I can quickly toggle 
the power button on the P3, and then the internal dispaly comes up.


The theory is that during initial power on, the power rail comes up too 
slowly to get a clean power-on reset to the internal display 
controller.  Note that the P3 has been working fine for me since I 
purchased the kit about ten years ago.  This is a recent issue, showing 
up about a year ago, as far as I can tell.


Some suggestions have been to replace one or more power supply 
capacitors assuming they've become flakey, or to plug the P3 power into 
the station supply, instead of the 12VDC output on the back of the K3s 
(assuming that the 12VDC output is weak or slow to rise during K3s power 
on).  I've not tried either of those solutions, preferring to just 
mitigate the issue by toggling the power, which doesn't happen very 
often, because I tend to leave the rig on most of the time.


Hope that helps, and 73,

-- Dave, N8SBE

Quoting n...@earthlink.net:


My P3 screen has gone black. When I plug in the power, I still hear some
very quiet relay click.  Any quick ideas?

Full disclosure: I suffered a voltage spike some time ago which took 
out my

K3 some time ago (it is at Elecraft now); P3 still operated but the POWER
switch no longer worked, i.e. it was on all the time whenever power was
applied. (I am borrowing a K3 from a very, very good friend).

Does anyone work on P3's besides Elecraft?

Allen R. Brier N5XZ

1515 Windloch Lane

Richmond, TX 77406

713-705-4801

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Re: [Elecraft] P3 gone BLACK

[Dave New]

 Allen,

I have this issue with my P3, and it seems to be related to internal  
(to the P3) power rail problems.


I have the SVGA adapter, and the external display always works, even  
if the P3 display isn't.


After leaving the power on for a minute or less, I can quickly toggle  
the power button on the P3, and then the internal dispaly comes up.


The theory is that during initial power on, the power rail comes up  
too slowly to get a clean power-on reset to the internal display  
controller.  Note that the P3 has been working fine for me since I  
purchased the kit about ten years ago.  This is a recent issue,  
showing up about a year ago, as far as I can tell.


Some suggestions have been to replace one or more power supply  
capacitors assuming they've become flakey, or to plug the P3 power  
into the station supply, instead of the 12VDC output on the back of  
the K3s (assuming that the 12VDC output is weak or slow to rise during  
K3s power on).  I've not tried either of those solutions, preferring  
to just mitigate the issue by toggling the power, which doesn't happen  
very often, because I tend to leave the rig on most of the time.


Hope that helps, and 73,

-- Dave, N8SBE

Quoting n...@earthlink.net:


My P3 screen has gone black. When I plug in the power, I still hear some
very quiet relay click.  Any quick ideas?

Full disclosure: I suffered a voltage spike some time ago which took out my
K3 some time ago (it is at Elecraft now); P3 still operated but the POWER
switch no longer worked, i.e. it was on all the time whenever power was
applied. (I am borrowing a K3 from a very, very good friend).

Does anyone work on P3's besides Elecraft?

Allen R. Brier N5XZ

1515 Windloch Lane

Richmond, TX 77406

713-705-4801

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Re: [Elecraft] P3 FS in UK

[Paul GACEK via Elecraft]

Does it include the VGA options?

Paul
M0SNA/W6PNG 

> On Jun 20, 2022, at 9:52 AM, John Chappell G3XRJ  wrote:
> 
> Fully working in excellent condition complete with cables for linking to K3.
> The P3 allows accurate signal level analysis and transforms the K3 experience.
> 
> £495 delivered
> 
> John G3XRJ
> 07789 652868
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Re: [Elecraft] P3 as a phase noise measurement tool

[jerry]

and I have an Ebay special GPSDO, which is ridiculously accurate.  
But I

don't know how pure it is.

 - Jerry KF6VB

On 2022-06-07 17:14, Wes wrote:

Sure, but how do you quantify the "relatively pure" source if you
build one?  Typically you want it to be 10 dB better than what you are
measuring (or the measuring instrument).

The other option is a commercial source with published specs.  For
example I have an ebay special Morion MV89 10 MHz OCXO that is
specified at -150 dBc/Hz at 1 kHz offset, which is way better than you
could measure with a spectrum analyzer technique.

Wes  N7WS



On 6/7/2022 2:12 PM, jerry wrote:

On 2022-06-07 13:56, Wes wrote:
 *plus* the phase

fluctuations in the measurement system's oscillators and/or sampling
clock jitter.  This is the K3/P3.


*** I wonder if the noise of the K3/P3 could be measured using a 
relatively pure
signal source - then once that's known, you would subtract the K3/P3's 
noise from the

total noise measured from the DUT.

   I had a book somewhere with plans for a really clean 
single-frequency signal source.  It used several
identical crystals;  one as an oscillator and then some more as a 
filter to clean it up.


  - Jerry KF6VB

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Re: [Elecraft] P3 as a phase noise measurement tool

[Wes]

Sure, but how do you quantify the "relatively pure" source if you build one?  
Typically you want it to be 10 dB better than what you are measuring (or the 
measuring instrument).


The other option is a commercial source with published specs.  For example I 
have an ebay special Morion MV89 10 MHz OCXO that is specified at -150 dBc/Hz at 
1 kHz offset, which is way better than you could measure with a spectrum 
analyzer technique.


Wes  N7WS



On 6/7/2022 2:12 PM, jerry wrote:

On 2022-06-07 13:56, Wes wrote:
 *plus* the phase

fluctuations in the measurement system's oscillators and/or sampling
clock jitter.  This is the K3/P3.


*** I wonder if the noise of the K3/P3 could be measured using a relatively pure
signal source - then once that's known, you would subtract the K3/P3's noise 
from the

total noise measured from the DUT.

   I had a book somewhere with plans for a really clean single-frequency 
signal source.  It used several
identical crystals;  one as an oscillator and then some more as a filter to 
clean it up.


  - Jerry KF6VB


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Re: [Elecraft] P3 as a phase noise measurement tool

[Dave (NK7Z)]

That is one of the reasons I am not going the nanoVNA route...  I 
suspect the P3 is a far better measurement tool.


73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 6/7/22 15:07, Jim Brown wrote:

On 6/7/2022 1:56 PM, Wes wrote:
But...what you measure are the results of phase fluctuations in the 
DUT *plus* the phase fluctuations in the measurement system's 
oscillators and/or sampling clock jitter.  This is the K3/P3.


Yes

73, Jim K9YC
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Re: [Elecraft] P3 as a phase noise measurement tool

[Jim Brown]

On 6/7/2022 1:56 PM, Wes wrote:
But...what you measure are the results of phase fluctuations in the DUT 
*plus* the phase fluctuations in the measurement system's oscillators 
and/or sampling clock jitter.  This is the K3/P3.


Yes

73, Jim K9YC
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Re: [Elecraft] P3 as a phase noise measurement tool

[Dave (NK7Z)]

Jim,
Thanks for your answer!  Also, thanks for your past work!!

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 6/7/22 12:13, Jim Brown wrote:

On 6/7/2022 8:04 AM, Dave (NK7Z) wrote:

Thanks in advance for any help in this...


I use a P3/SVGA to measure signal bandwidth (and before I had the SVGA 
board, used the P3). It's dynamic range is 100 dB, but the screen can 
display only 80 dB. A rig with decent phase noise performance is well 
below that.


See http://k9yc.com/TXNoise.pdf  which compiles measurements done in 
ARRL Labs. The plotted data are ARRL measurements in electronic form for 
a dozen or so rigs, re-plotted on the same graph. I did this work in 
2014; it was motivated in part by complaints by WRTC participants, and 
the rigs chosen were those they used, and other mainstream rigs popular 
at the time.


Phase noise from a CW signal is heard as a "whooshing" sound away from 
the signal, and is what makes cheap rigs unwelcome on Field Day. It 
extends hundreds of kHz away from the transmitter frequency. It's also 
present, of course, on SSB and digital modes, and is also present in 
receive.


This was a LOT of work that required a lot of cooperation with ARRL 
Labs, and I have no interest in re-doing it for today's rigs.


73, Jim K9YC

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Re: [Elecraft] P3 as a phase noise measurement tool

[jerry]

On 2022-06-07 13:56, Wes wrote:
 *plus* the phase

fluctuations in the measurement system's oscillators and/or sampling
clock jitter.  This is the K3/P3.


*** I wonder if the noise of the K3/P3 could be measured using a 
relatively pure
signal source - then once that's known, you would subtract the K3/P3's 
noise from the

total noise measured from the DUT.

   I had a book somewhere with plans for a really clean single-frequency 
signal source.  It used several
identical crystals;  one as an oscillator and then some more as a filter 
to clean it up.


  - Jerry KF6VB
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Re: [Elecraft] P3 as a phase noise measurement tool

[Wes]

I can't answer the first two and Al has given the answer to the third.

But, you're not going to be measuring phase noise in the strictest sense, but 
what ARRL calls composite-noise.  Interesting they *do* actually measure phase 
noise with an HP11848 Phase noise test set and then they assume that phase noise 
dominates AM noise and call it composite.  Go figure.


Today, everyone calls single-sided noise "phase noise" for the same reason, but 
it needs to be remembered this noise is due to phase fluctuations in the device 
under test (DUT).  But...what you measure are the results of phase fluctuations 
in the DUT *plus* the phase fluctuations in the measurement system's oscillators 
and/or sampling clock jitter.  This is the K3/P3.


Wes  N7WS


References:

https://www.ab4oj.com/test/docs/rs_pn2015.pdf

http://www.ke5fx.com/phase_noise.pdf  (I used to work with Terry Decker, one of 
the authors of this)



On 6/7/2022 8:04 AM, Dave (NK7Z) wrote:

Hi,

I am contemplating practicing some phase noise measurements using a P3. If I 
correctly understand the measurement, (which I may not), I should express the 
result, using db down from peak, so many Hz away from peak, using a 1 Hz width.


First question; is the above correct?

Second question; (amusing Q1 is correct), what is the pixel width of the P3, 
and can I just divide that width by total frequency spread shown on the P3, 
and assume that number I get is correct for width per pixel in Hz?


Third question, (assuming Q2 is correct), once I get a number from question 2, 
can I then just divide that result by X, where X is selected to bring the 
width of measurement to 1 Hz?


Thanks in advance for any help in this...


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Re: [Elecraft] P3 as a phase noise measurement tool

[Jim Brown]

On 6/7/2022 8:04 AM, Dave (NK7Z) wrote:

Thanks in advance for any help in this...


I use a P3/SVGA to measure signal bandwidth (and before I had the SVGA 
board, used the P3). It's dynamic range is 100 dB, but the screen can 
display only 80 dB. A rig with decent phase noise performance is well 
below that.


See http://k9yc.com/TXNoise.pdf  which compiles measurements done in 
ARRL Labs. The plotted data are ARRL measurements in electronic form for 
a dozen or so rigs, re-plotted on the same graph. I did this work in 
2014; it was motivated in part by complaints by WRTC participants, and 
the rigs chosen were those they used, and other mainstream rigs popular 
at the time.


Phase noise from a CW signal is heard as a "whooshing" sound away from 
the signal, and is what makes cheap rigs unwelcome on Field Day. It 
extends hundreds of kHz away from the transmitter frequency. It's also 
present, of course, on SSB and digital modes, and is also present in 
receive.


This was a LOT of work that required a lot of cooperation with ARRL 
Labs, and I have no interest in re-doing it for today's rigs.


73, Jim K9YC

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Re: [Elecraft] P3 as a phase noise measurement tool

[Dave (NK7Z)]

Al,
THANK YOU  Also, thanks for the formula!  :)

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 6/7/22 08:18, Al Lorona wrote:

According to Al, N1AL, "The effective bandwidth of the P3 is approximately one pixel 
on the display, which is SPAN/468.  So, for example, if the span is 47 kHz, the effective 
bandwidth is about 100 Hz."

To "convert" or "correct" to a 1 Hz bandwidth, use the formula:

BW_correction_factor = 10 * log(P3_effective_BW)

For instance, to "convert" a 100 Hz effective P3 bandwidth to 1 Hz, the factor 
would be 20 dB. So, if you measured a noise level of -80 dBm on the P3 whose effective 
bandwidth were 100 Hz, that would really be -100 dBm in a 1 Hz bandwidth.

Al  W6LX/4




On Tuesday, June 7, 2022, 11:06:05 AM EDT, Dave (NK7Z)  wrote:





Hi,

I am contemplating practicing some phase noise measurements using a P3.
If I correctly understand the measurement, (which I may not), I should
express the result, using db down from peak, so many Hz away from peak,
using a 1 Hz width.

First question; is the above correct?

Second question; (amusing Q1 is correct), what is the pixel width of the
P3, and can I just divide that width by total frequency spread shown on
the P3, and assume that number I get is correct for width per pixel in Hz?

Third question, (assuming Q2 is correct), once I get a number from
question 2, can I then just divide that result by X, where X is selected
to bring the width of measurement to 1 Hz?

Thanks in advance for any help in this...


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Re: [Elecraft] P3 as a phase noise measurement tool

[Al Lorona]

According to Al, N1AL, "The effective bandwidth of the P3 is approximately one 
pixel on the display, which is SPAN/468.  So, for example, if the span is 47 
kHz, the effective bandwidth is about 100 Hz."

To "convert" or "correct" to a 1 Hz bandwidth, use the formula:

BW_correction_factor = 10 * log(P3_effective_BW)

For instance, to "convert" a 100 Hz effective P3 bandwidth to 1 Hz, the factor 
would be 20 dB. So, if you measured a noise level of -80 dBm on the P3 whose 
effective bandwidth were 100 Hz, that would really be -100 dBm in a 1 Hz 
bandwidth.

Al  W6LX/4




On Tuesday, June 7, 2022, 11:06:05 AM EDT, Dave (NK7Z)  wrote: 





Hi,

I am contemplating practicing some phase noise measurements using a P3. 
If I correctly understand the measurement, (which I may not), I should 
express the result, using db down from peak, so many Hz away from peak, 
using a 1 Hz width.

First question; is the above correct?

Second question; (amusing Q1 is correct), what is the pixel width of the 
P3, and can I just divide that width by total frequency spread shown on 
the P3, and assume that number I get is correct for width per pixel in Hz?

Third question, (assuming Q2 is correct), once I get a number from 
question 2, can I then just divide that result by X, where X is selected 
to bring the width of measurement to 1 Hz?

Thanks in advance for any help in this...

-- 
73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources
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Re: [Elecraft] P3 help requested...

[Dave (NK7Z)]

Many thanks to Mike Flowers, and PE1HCG, both sent me a note, to check 
the cables inside the P3 as they sometimes come loose in shipping.  That 
was indeed the issue!


The coax between the signal conditioner at the BNC connector, and the 
main PCB had come loose in shipping.  It is not very tight, so I am sure 
that is what happened.  All is working now, and thanks to both Mike and 
PE3HCG!


73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 5/14/22 06:50, Dave (NK7Z) wrote:

Morning,

I had a P3 failure back in December, and sent in P3, (serial number 
3155), to Elecraft for repair.


While 3155 was in for repair, I purchased locally a second P3 to use in 
P3, 3155's place, and have been using it with no issues.


P3, 3155 arrived back to my home about a month ago, and I am now getting 
around to testing it out.


I just took P3, (3155), (the one Elecraft had just repaired), out of the 
shipping box for the first time, and inserted it in place of the working 
P3, serial 2037.


I get a waterfall, just a noise floor, and I get a trace.  Again, just 
noise floor.  It appears working in all other aspects.


I have recovered from a back up of 3155, (taken before it failed 
completely), and that brought back the settings etc., but I still have 
no signal on the trace of the just repaired P3.


I then swapped back in the P3 I purchased to use while 3155 was in 
service, and it works fine...


This tells me that the P3 wiring between the K3 and the P3, are 
connected correctly, and that the K3 settings are correct to drive a P3.


I swapped back in the just repaired P3, (3155), and again, no signals, 
just a noise floor.


So it is either a problem in my setup of the just repaired P3, 
(probably), or a failed repair by Elecraft.  I am trying to triage this 
prior to contacting Elecraft, in the hopes it is my issue.    My guess 
is some sort of setup problem, as Elecraft repair has always been good...


Can someone suggest what setting(s) I might further check?  I looked at 
the radio definition, and all setting there are the same as the working 
P3...  I suspected IF frequency might be set wrong on the just repaired 
P3, but it appears to match the working P3.


I also checked most of the obvious settings that might cause an issue, 
but can find nothing...  It just looks like I have no IF input to the 
just repaired P3.


Any ideas where else I might check on the failed P3?  I am being very 
careful to make ZERO changes to the K3, as it drives P3 number 2037 fine.



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Re: [Elecraft] P3 Sprogs

[w4sc]

I had the same issues.  The interconnects supplied with the P3s I had were 
poor.  I finally cut every one in half and filed in the circular file.  Made my 
own with some DS-RG316 and quality 50 Ohm BNC new old stock.  No more 
interconnect issues….
de Ben W4SC

Sent from Mail for Windows

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Re: [Elecraft] P3 Sprogs

[George Danner]

BNC cables do have issues all of their own. First a manual connector seems
difficult for some to terminate properly (especially the shield).
Connectors have 2 sizes of center pins (50 & 75 ohm). Using a large
connector and then a smaller conductor will cause an intermittent at the
female center.

As a broadcaster who converted from video on PL259s to BNCs, we became very
aware of these issues. To the point that 75 ohm BNC jumpers in the shop had
green tape or shrink tubing and 50 ohm had red. More than 99% of our
plant's cables were 75 ohm! We only stocked 75 ohm connectors at the studio
and 50 ohm connectors at the transmitter.
There were several attempts to have a single compatible connector. Not sure
that was actually accomplished!

I had a similar issue shortly after I installed my P3. I just used a solder
pick to tighten the K3 & P3 BNCs female center leaves. Fixed my issue with
a 2010 P3 kit. Not sure which of the 4 connectors was the culprit - the
cable is Elecraft, K3 & P3 are Elecraft.

Memory from long ago seems to remember the 75 ohm pin was the smallest
diameter; so using a 50 ohm connector could expand the female and then
using a 75 ohm connection could become intermittent.

73 George AI4VZ

On Mon, Jan 31, 2022 at 3:00 PM Fred Jensen  wrote:

> I had a similar problem when I first got my P3.  The symptom(s) centered
> around the noise drifting upward.  Hand on top would send it back down
> to the baseline.  One of the Elecraft techs [who I know well] sent me a
> new jumper on the condition that I cut the old one into 5 cm pieces so
> it didn't show up at a swap meet.  The new one fixed the issues.
>
> The P3 is really a tuneable receiver that covers most of the HF
> spectrum.  We just leave it tuned to the 8 MHz 1st IF.  If the
> cable/connectors are not really shielded well, it will pick up ambient
> noise.
>
> 73,
>
> Fred ["Skip"] K6DGW
> Sparks NV DM09dn
> Washoe County
>
> Victor Rosenthal 4X6GP wrote on 1/31/2022 1:06 AM:
> > Trevor,
> >
> > Try another coax jumper between the K3 and P3. I have heard of this
> > problem being caused by poor connection of the shield braid (or
> > low-quality braid) in the jumper.
> >
> > 73,
> > Victor, 4X6GP
> > Rehovot, Israel
> > CWops #5
> > Formerly K2VCO
> > https://www.qsl.net/k2vco/
> >
> > On 31/01/2022 10:09, MØTDZ wrote:
> >> I am sure I have seen some threads on this before so please accept
> >> apologies If i am going over something twice.
> >>
> >> Having moved to an area with a  much lower noise level I note loads
> >> of sprogs / spurious signals following me around on the P3
> >> panadapter.  Is there a common cause of these (im presuming they are
> >> generated by the K3S) and anything I should/could be doing to get rid
> >> of them?
> >>
> >> Trevor MW0TDZ / M0DX
>
>
>
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Re: [Elecraft] P3 Sprogs

[Fred Jensen]

I had a similar problem when I first got my P3.  The symptom(s) centered 
around the noise drifting upward.  Hand on top would send it back down 
to the baseline.  One of the Elecraft techs [who I know well] sent me a 
new jumper on the condition that I cut the old one into 5 cm pieces so 
it didn't show up at a swap meet.  The new one fixed the issues.


The P3 is really a tuneable receiver that covers most of the HF 
spectrum.  We just leave it tuned to the 8 MHz 1st IF.  If the 
cable/connectors are not really shielded well, it will pick up ambient 
noise.


73,

Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

Victor Rosenthal 4X6GP wrote on 1/31/2022 1:06 AM:

Trevor,

Try another coax jumper between the K3 and P3. I have heard of this 
problem being caused by poor connection of the shield braid (or 
low-quality braid) in the jumper.


73,
Victor, 4X6GP
Rehovot, Israel
CWops #5
Formerly K2VCO
https://www.qsl.net/k2vco/

On 31/01/2022 10:09, MØTDZ wrote:

I am sure I have seen some threads on this before so please accept
apologies If i am going over something twice.

Having moved to an area with a  much lower noise level I note loads
of sprogs / spurious signals following me around on the P3
panadapter.  Is there a common cause of these (im presuming they are
generated by the K3S) and anything I should/could be doing to get rid
of them?

Trevor MW0TDZ / M0DX




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Re: [Elecraft] P3 Sprogs

[Victor Rosenthal 4X6GP]

Trevor,

Try another coax jumper between the K3 and P3. I have heard of this 
problem being caused by poor connection of the shield braid (or 
low-quality braid) in the jumper.


73,
Victor, 4X6GP
Rehovot, Israel
CWops #5
Formerly K2VCO
https://www.qsl.net/k2vco/

On 31/01/2022 10:09, MØTDZ wrote:

I am sure I have seen some threads on this before so please accept
apologies If i am going over something twice.

Having moved to an area with a  much lower noise level I note loads
of sprogs / spurious signals following me around on the P3
panadapter.  Is there a common cause of these (im presuming they are
generated by the K3S) and anything I should/could be doing to get rid
of them?

Trevor MW0TDZ / M0DX


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Re: [Elecraft] P3 VGA Video Capture Card

[Barry Baines via Elecraft]

Ed:


> On Jan 8, 2022, at 10:21 AM, Ed G  wrote:
> 
> Hello,
> I am investigating ways to be able to see P3 video when linking to a 
> local computer via a remote desktop type of program.  The local computer 
> would be controlling a K3 using Win4K3 and I would like to also be able to 
> see the P3 video.  So I am considering a VGA capture card to allow the P3 
> video to be displayed on the local monitor. One card I looked at:
> 
> https://www.amazon.com/Capture-Streaming-Teaching-Conference-Broadcasting/dp/B08GYXZC3D
> 
> Is anyone on the list doing something similar?  Looking for comments and/or 
> suggestions; thanks!

Please keep in mind that VGA is defined as 640 x 480 pixels whereas the P3 with 
the Display Option provides Super VGA which provides a resolution of 1024 x 760 
pixels.  The P3 SVGA Display Option can also handle 1280 x 1024, 1440 x 900, 
and 1920 x 1080 pixels.  

The device you’re looking at says “VGA” so I presume this means it cannot 
handle SVGA.  

Another option would be to use an SDR ‘dongle’ with SDR software running as a 
panadapter.  I have the RF output from the P3 going to a SDRPlay device running 
SDRuno on the PC in the shack and remotely connect to the PC to view that 
panadapter running off the K3/P3 receive RF.  

SDRuno uses Omnirig that allows the SDR to ‘follow’ the K3 frequency so as the 
K3 changes frequency the panadapter provided by the SDRuno software displays 
the frequency of the K3.  I can also adjust the K3 frequency by changing the 
frequency on SDRuno.   

FWIW,

Barry Baines, WD4ASW/5
Keller, TX





> 
> --Ed, N3CW—
> 
> 
> Sent from Mail for Windows
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> 
> 
> 
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Re: [Elecraft] P3 VGA Video Capture Card

[Allan Zadiraka]

I have been using a StarTech.com USB3HDCAP USB 3.0 Video Capture Device
with the WIN4K3 panadapter display since 2016.  Works great except when a
Windows update messes with it and I have to reinit the proper driver.

zeke (AL) ab8ou





On Sat, Jan 8, 2022 at 11:22 AM Ed G  wrote:

> Hello,
>  I am investigating ways to be able to see P3 video when linking to a
> local computer via a remote desktop type of program.  The local computer
> would be controlling a K3 using Win4K3 and I would like to also be able to
> see the P3 video.  So I am considering a VGA capture card to allow the P3
> video to be displayed on the local monitor. One card I looked at:
>
>
> https://www.amazon.com/Capture-Streaming-Teaching-Conference-Broadcasting/dp/B08GYXZC3D
>
> Is anyone on the list doing something similar?  Looking for comments
> and/or suggestions; thanks!
>
> --Ed, N3CW—
>
>
> Sent from Mail for Windows
>
>
>
>
> --
> This email has been checked for viruses by Avast antivirus software.
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Re: [Elecraft] P3 Issue

[Ray]

Ken an Mike
I did some Troubleshooting over the Years.
2 thing to help.

I understand that there is an App for the I-Phone that 
Lets you see a Heat/IR Pattern on the screen.
This should help SEE a Heated Part.
The 2nd is, get a Can of Component Cooler/
Freeze Spray to Shoot the Hot Part and see
The Problem recovers.
I wou;ld Clean All Cables, Sockets and Plugs
Power Supply Connections FIRST.

Ray WA6VAB  K3  

From: Michael Carter
Sent: Monday, November 29, 2021 9:08 PM
To: Elecraft@mailman.qth.net
Subject: Re: [Elecraft] P3 Issue

Ken,

I have not experienced the difficulty
with my P3 that you encountered,
but the fact that both the P3 front
panel display and the external SVGA
display shut down indicates a problem
with data not being provided to either
display driver system OR there is a
thermal problem with one of the
onboard voltage regulators on the P3
Rear Panel I/O board.  The P3 has
both +5V and + 3.3V regulators with
crowbar over-voltage protection, and
both are fed from the +12V DC input
jack.  The P3 SVGA board has additional
voltage regulators supplying 1.2, 2.5, and
3.3V, and these are fed from the +5 V
regulated supply on the P3 Rear Panel I/O
board.

My suspicion is a thermal sensitivity
in the +5 V regulator or its crowbar
protection circuit.  However, I would
first check the +12V DC input connection
to the P3 and be sure that it is stable
at +12V over time.  If you supply that
voltage from the auxiliary +12V output
of a K3 or K3s, you should also check
that the problem doesn't stem from
a problem inside the transceiver.  My
recollection is that a modification
was required in the original K3 to
increase the available current at the
auxiliary +12V DC output to support
the SVGA option in the P3.

I am curious to know what you find...

73,
Mike, K8CN
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Re: [Elecraft] P3 Issue

[Michael Carter]

Ken,

I have not experienced the difficulty
with my P3 that you encountered,
but the fact that both the P3 front
panel display and the external SVGA
display shut down indicates a problem
with data not being provided to either
display driver system OR there is a
thermal problem with one of the
onboard voltage regulators on the P3
Rear Panel I/O board.  The P3 has
both +5V and + 3.3V regulators with
crowbar over-voltage protection, and
both are fed from the +12V DC input
jack.  The P3 SVGA board has additional
voltage regulators supplying 1.2, 2.5, and
3.3V, and these are fed from the +5 V
regulated supply on the P3 Rear Panel I/O
board.

My suspicion is a thermal sensitivity
in the +5 V regulator or its crowbar
protection circuit.  However, I would
first check the +12V DC input connection
to the P3 and be sure that it is stable
at +12V over time.  If you supply that
voltage from the auxiliary +12V output
of a K3 or K3s, you should also check
that the problem doesn't stem from
a problem inside the transceiver.  My
recollection is that a modification
was required in the original K3 to
increase the available current at the
auxiliary +12V DC output to support
the SVGA option in the P3.

I am curious to know what you find...

73,
Mike, K8CN
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Re: [Elecraft] P3: Is ther a way to move macros from one P3 to another P3?

[Carl]

Dave,

Also the K3 memory editor can read the memories and send them to a K3.

https://elecraft.com/pages/elecraft-frequency-memory-editor-software

Carl

AB1DD


On 11/24/2021 10:56 AM, Carl wrote:

Have you tried this:

https://dl2rum.de/RUMlogNG/docs/en/pages/CAT-KX3.html

Might work?

On 11/24/2021 10:52 AM, Dave wrote:

Hi,

I have 50 macros programmed into one P3, and want to move them to a 
different P3.


Does anyone know of a way to move the macros programmed into one P3, 
to a different P3, not by simply retyping them into the new P3?



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Re: [Elecraft] P3: Is ther a way to move macros from one P3 to another P3?

[Dave]

Carl,

I must be blind, am I missing a download link for this software?  I 
don't see one on that page...


73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 11/24/21 07:56, Carl wrote:

Have you tried this:

https://dl2rum.de/RUMlogNG/docs/en/pages/CAT-KX3.html

Might work?

On 11/24/2021 10:52 AM, Dave wrote:

Hi,

I have 50 macros programmed into one P3, and want to move them to a 
different P3.


Does anyone know of a way to move the macros programmed into one P3, 
to a different P3, not by simply retyping them into the new P3?



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Re: [Elecraft] P3: Is ther a way to move macros from one P3 to another P3?

[Dave]

Thank you Carl, I will look at that software...

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 11/24/21 07:56, Carl wrote:

Have you tried this:

https://dl2rum.de/RUMlogNG/docs/en/pages/CAT-KX3.html

Might work?

On 11/24/2021 10:52 AM, Dave wrote:

Hi,

I have 50 macros programmed into one P3, and want to move them to a 
different P3.


Does anyone know of a way to move the macros programmed into one P3, 
to a different P3, not by simply retyping them into the new P3?



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Re: [Elecraft] P3: Is ther a way to move macros from one P3 to another P3?

[Carl]

Have you tried this:

https://dl2rum.de/RUMlogNG/docs/en/pages/CAT-KX3.html

Might work?

On 11/24/2021 10:52 AM, Dave wrote:

Hi,

I have 50 macros programmed into one P3, and want to move them to a 
different P3.


Does anyone know of a way to move the macros programmed into one P3, 
to a different P3, not by simply retyping them into the new P3?



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Re: [Elecraft] P3 Acting Wonky

[James Bennett via Elecraft]

That’s for sure. And this is a good one to belong to. :-)

73, Jim / K7TXA

> On Sep 23, 2021, at 4:20 PM, Lou Mecseri  wrote:
> 
> A "community" is smarter than one individual. Hi.
> 
> 73, Lou KE1F
> 
> On 9/23/2021 22:11, James Bennett via Elecraft wrote:
>> Bingo! That was it Mike - thanks! With as many cables to hook up with the 
>> K-Line (I thought this was wireless radio!) that is one I missed. Hooked up 
>> a short BNC cable and now it works.
>> 
>> Thanks again!
>> 
>> 
>> Jim Bennett
>> Eagle, ID
>> 
>> 
>> 
>> 
>>> On Sep 23, 2021, at 3:30 PM, Michael Carter  wrote:
>>> 
>>> Jim,
>>> 
>>> At the risk of asking the obvious question, did you remember to
>>> connect the coaxial cable from the K3 IF output to the P3 input?
>>> The other data functions are handled by the RS-232 cabling,
>>> but without RF there's nothing to display.
>>> 
>>> Mike, K8CN
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Re: [Elecraft] P3 Acting Wonky

[Lou Mecseri]

A "community" is smarter than one individual. Hi.

73, Lou KE1F

On 9/23/2021 22:11, James Bennett via Elecraft wrote:

Bingo! That was it Mike - thanks! With as many cables to hook up with the 
K-Line (I thought this was wireless radio!) that is one I missed. Hooked up a 
short BNC cable and now it works.

Thanks again!


Jim Bennett
Eagle, ID





On Sep 23, 2021, at 3:30 PM, Michael Carter  wrote:

Jim,

At the risk of asking the obvious question, did you remember to
connect the coaxial cable from the K3 IF output to the P3 input?
The other data functions are handled by the RS-232 cabling,
but without RF there's nothing to display.

Mike, K8CN
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Re: [Elecraft] P3 Acting Wonky

[James Bennett via Elecraft]

Bingo! That was it Mike - thanks! With as many cables to hook up with the 
K-Line (I thought this was wireless radio!) that is one I missed. Hooked up a 
short BNC cable and now it works. 

Thanks again!


Jim Bennett
Eagle, ID




> On Sep 23, 2021, at 3:30 PM, Michael Carter  wrote:
> 
> Jim,
> 
> At the risk of asking the obvious question, did you remember to
> connect the coaxial cable from the K3 IF output to the P3 input?
> The other data functions are handled by the RS-232 cabling,
> but without RF there's nothing to display.
> 
> Mike, K8CN
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Re: [Elecraft] P3 Acting Wonky

[Don Wilhelm]

Jim,

Check the BNC cable between the K3 IF Out and the P3.  At the P3 end, 
make sure it is connected to IF IN.


73,
Don W3FPR

On 9/23/2021 4:48 PM, James Bennett via Elecraft wrote:

Hope someone can help me out on this one. I just moved into a new home, 
relocating my station from CA to ID. Got the K3/P3/KAT500/KPA500 all hooked up. 
All was working fine at the previous QTH. Now, the P3 is not showing me any 
signals. The “signal level” is below S0. I have an IC-705 that I key up at 10 
watts into an inside dipole. It registers 60 over S9 on the K3 meter, but not a 
trace of signal showing on the P3. The frequency display on the P3 is spot-on 
with what the K3 is set to. If I turn on marker A on the P3 then tap to QSY, 
the K3 obeys and follows. That kinda tells me the cabling between the two is OK.

So, why do I not see any signal at all on the P3? Pilot error? Could be, but 
where…?



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Re: [Elecraft] P3 frequency Display

[CUTTER DAVID via Elecraft]

According to my calculations on MIL217 connectors are the least reliable of all 
components from memory

David G3UNA

> On 10 June 2021 at 17:17 lmarion mailto:lmar...@mt.net > 
> wrote:
> 
> 
> retried FAA electronic tech, I have fixed by far more by repluging or
> reseating a card or connector on multi million dollar equipment
> than part replacement.
> 
> leroy AB7CE
> 
> -Original Message-
> From: N4ZR
> Sent: Thursday, June 10, 2021 9:22 AM
> To: elecraft@mailman.qth.net mailto:elecraft@mailman.qth.net
> Subject: Re: [Elecraft] P3 frequency Display
> 
> I was cruising the archive yesterday on another P3 question and was
> struck by how many people reported problems that cleared up when they
> reinserted or tightened connectors
> 
> 
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Re: [Elecraft] P3 frequency Display

[lmarion]

retried FAA  electronic tech, I have fixed by far more by repluging or 
reseating a card or connector on multi million dollar equipment

than part replacement.

leroy AB7CE

-Original Message- 
From: N4ZR

Sent: Thursday, June 10, 2021 9:22 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] P3 frequency Display

I was cruising the archive yesterday on another P3 question and was
struck by how many people reported problems that cleared up when they
reinserted or tightened connectors


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Re: [Elecraft] P3 frequency Display

[N4ZR]

I was cruising the archive yesterday on another P3 question and was 
struck by how many people reported problems that cleared up when they 
reinserted or tightened connectors


73, Pete N4ZR
Check out the new Reverse Beacon Network
web server at .
For spots, please use your favorite
"retail" DX cluster.

On 6/10/2021 8:30 AM, Ray Spreadbury via Elecraft wrote:

Thanks for the various ideas but still no solution to my problem.
I can only think either my Elecraft cable P3/RS232 is partially faulty – (my PC 
is however picking up the frequency info for the logging program from the PC 
RS232 socket on the P3) or there is a firmware problem in the P3 which I will 
try and update.
73
Ray G3XLG

Sent from Mail for Windows 10

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Re: [Elecraft] P3 Frequency Display

[Martin Sole]

That sounds like either, there is no RS232 connection cable between the 
K3(S) and the P3 or, the P3 radio configuration is not properly set. 
Check the P3 manual for radio configuration and RS232 port speed etc.


Martin, HS0ZED


On 9/6/64 19:08, Ray Spreadbury via Elecraft wrote:

My new to me P3 is not displaying the frequency but rather at the top has a 0 
in the middle and +5, and -5 at either end if the spread is set to 10 for 
example. How do I get the frequency displayed please?
73 Ray G3XLG


Sent from Mail for Windows 10

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Re: [Elecraft] P3 freezes

[Bill Frantz]

I travel with my computer and connect it to my K3 (upgraded) 
every time I go on the air. The last time I started operating, I 
noticed that my P3 did not know the frequency the K3 was using. 
I then noticed that I hadn't plugged the USB connection between 
the K3 and the computer into the computer. I plugged it in and 
everything worked again.


I think this may have been because the K3 needs to be polled in 
order to send the frequency data. (There is a menu option to 
automatically send the frequency data. I am away from the radio 
so I can't check how it is set on my K3.) Hooking the radio to 
my computer let the logging program provide the polling.


73 Bill AE6JV

On 6/8/21 at 10:15 PM, gthorn...@thorntonmostullaw.com (George 
Thornton) wrote:


I have a more or less fully loaded K3 with the synthesizer 
upgrades.  The K3 was gone through at the factory and appears 
to be running well.


I have a P3 that also has the SVGA card and the transmit monitor add on.

On a number of occasions my P3 seems to freeze and fails to 
move with tuning as I turn the tuning knob.


Before I call Elecraft for guidance I wonder if anyone has any suggestions.
THANKS.


---
Bill Frantz| "The only thing we have to   | Periwinkle
(408)348-7900  | fear is fear itself." - FDR  | 150 
Rivermead Rd #235
www.pwpconsult.com | Inaugural address, 3/4/1933  | 
Peterborough, NH 03458


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Re: [Elecraft] P3 freezes

[George Thornton]

I have a more or less fully loaded K3 with the synthesizer upgrades.  The K3 
was gone through at the factory and appears to be running well.

I have a P3 that also has the SVGA card and the transmit monitor add on.

On a number of occasions my P3 seems to freeze and fails to move with tuning as 
I turn the tuning knob.

Before I call Elecraft for guidance I wonder if anyone has any suggestions.  

THANKS.  

-Original Message-
From: elecraft-boun...@mailman.qth.net  On 
Behalf Of Bill Johnson
Sent: Monday, June 7, 2021 6:29 PM
To: w...@flashdog.us; elecraft@mailman.qth.net
Subject: Re: [Elecraft] K4 Lore

This was conversation when I was an FT for the KTA500.  My goal was to get that 
to happen.  There are already appliances to do so.  The MFJ 998 is both an in 
shack and also a remote device as well.  I use the in shack model which I 
operate remotely.  I think that is not the profitable route for elecraft at the 
moment.  They could chew up competition, but not a good pursuit given all the 
challenges of production and parts issues.  Please, understand that I have not 
insight, nor a clue of Elecrafts inside operation.

Bill
K9YEQ

-Original Message-
From: elecraft-boun...@mailman.qth.net  On 
Behalf Of w...@flashdog.us
Sent: Monday, June 7, 2021 8:06 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] K4 Lore

What would really be great is if we could get this Elecraft tuner in a remote 
option for the K4, K3S, K3 (& maybe, those other brands, too). 
IMHO, It’s the missing Elecraft option.
73,
Jeff/wb0m


Date: Fri, 4 Jun 2021 00:46:46 -0400
From: Julia Tuttle mailto:ju...@juliatuttle.net>>

"Elecraft's ATUs are generally wider range than other manufacturers', I 
thought, and that comes at a parts cost that everyone might not want to pay. 
I'd rather have the option for a wide range one than a built-in but less 
capable one."

On Fri, Jun 4, 2021, 00:41 John Nicholson mailto:macymonk...@charter.net>> wrote:

> Yes and no; both the IC-7610 and FTdx101 models include an internal 
> tuner without an optional charge.
> 
> John K7FD
> 
>> On Jun 3, 2021, at 9:23 PM, Rick Tavan > > wrote:
>> 
>> ?Ed K1EP mentioned that the K4 ATU is a cost-extra option on all K4
> models.
>> This is as it should be. If you have an external tuner in the shack 
>> or at the antenna or a tuner integrated into an amplifier that's 
>> always in line (or in Standby with the tuner enabled) or if all your 
>> antennas are well matched, you wouldn't want to pay Elecraft for a 
>> tuner inside K4 that you wouldn't be using. OTOH if, like me, you 
>> sometimes take your K4 to the field or operate it at a shack where 
>> there is no external auto-tuner,
> then
>> the K4 ATU option is delightful. IMHO, Elecraft made some good 
>> decisions
> on
>> what to include as standard and what to "optionalize" in K4.
>> 
>> /Rick N6XI
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Re: [Elecraft] P3

[Jim Brown]

On 5/23/2021 11:23 AM, ke9uw wrote:

yes


To what?

73, Jim K9YC
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Re: [Elecraft] P3

[ke9uw]

yes



-
Chuck, KE9UW
--
Sent from: http://elecraft.365791.n2.nabble.com/
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Re: [Elecraft] P3

[Macy monkeys]

And how about pigs and chickens? :) You gotta' love spell check...

John K7FD

> On May 22, 2021, at 9:51 AM, Andy Reistetter  wrote:
> 
> Can a P3 copy cow like the PX3?
> 
> Sent from my iPad
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Re: [Elecraft] P3 Failure, and question

[Dave Cole]

Hi Ben,
Thank you for the information!!!  I will look to see if that cap is wrong!

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 4/12/21 3:37 PM, w4sc wrote:

I had a similar problem.

I purchased a P3 kit in 2015, assembled, and it worked well.  The firmware as 
received, was a rev behind.  Trying to upgrade via the normal method, was 
unable to accomplish.  Trying to force an upgrade, was unsuccessful.  Had to 
return for warranty repair.  The EEPROM was corrupted.

All was OK until about 4 years ago, the P3, occasionally, would not boot up. I 
received some guidance from one of the engineers, to check a capacitor in the 
P3 power supply.  If it was a tantalum  (10 uF I believe), it was the incorrect 
value, and to change to 0.1uf (1206 sized).  After the capacitor change, no 
more powerup issues.  I believe there was a supply sequencing issue.

I am looking for the details, and when found, I will post.

Ben W4SC

Sent from Mail for Windows 10

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Re: [Elecraft] P3 Failure, and question

[w4sc]

I had a similar problem.

I purchased a P3 kit in 2015, assembled, and it worked well.  The firmware as 
received, was a rev behind.  Trying to upgrade via the normal method, was 
unable to accomplish.  Trying to force an upgrade, was unsuccessful.  Had to 
return for warranty repair.  The EEPROM was corrupted.

All was OK until about 4 years ago, the P3, occasionally, would not boot up. I 
received some guidance from one of the engineers, to check a capacitor in the 
P3 power supply.  If it was a tantalum  (10 uF I believe), it was the incorrect 
value, and to change to 0.1uf (1206 sized).  After the capacitor change, no 
more powerup issues.  I believe there was a supply sequencing issue. 

I am looking for the details, and when found, I will post.

Ben W4SC

Sent from Mail for Windows 10

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Re: [Elecraft] P3 Failure and such

[Jim Brown]

On 4/12/2021 12:19 PM, Dave Cole wrote:

In my case, I use the K3 power switch to shut down the station rig and P3.


That's I do, sort of -- I use my #1 K3's 12V accessory output to drive a 
relay that turns off everything in my station except the other radio. 
The K3s are fed with short, fat copper from a 100Ah LiFePO4 battery; 
everything else runs from a 100Ah SLA battery. That SLA's load includes 
antenna switching, P3/SVGAs, three video monitors, two LP100A power 
monitors, and LED strips that are task-lighting for the operating position.


Batteries are float charged using re-purposed Thinkpad power supplies 
with Genasun solar charge regulators.


73, Jim K9YC
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Re: [Elecraft] P3 Failure and such

[Dave Cole]

In my case, I use the K3 power switch to shut down the station rig and 
P3.  Thanks!


73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 4/12/21 11:55 AM, Bob McGraw K4TAX wrote:

I’ve always found and was taught that one should not just dump the power on 
station shut-down. This could be the cause of many mysterious and lucid 
operation

  Likewise; on power up:
(A). Power supply on first
(B). Transceiver on next
(C). P3 on if not powered from the K3
(D). KAT500 on if not powered from the K3

Shutdown the items in reverse order. NEVER just dump the power as there is a 
Power Down Imminent (PDI) circuit which saves data and then correctly shuts 
down the systems.

73
Bob, K4TAX

Sent from my iPhone

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Re: [Elecraft] P3 Failure, and question

[Howard Saxion via Elecraft]

I do not.  The repair invoice from Elecraft only indicated a faulty I/O board 
which was replaced. 
73
Howard/WX7HS

> On Apr 12, 2021, at 09:35, Dave New  wrote:
> 
>  Do you know just what failed on the I/O board?  Was it possibly due to 
> static discharge?
> 
> I tend to leave an antenna connected, except during active weather, but 
> curious if there is something sensitive in the P3 I/O area that can fail 
> easily from a surge, like the old RS-232 circuitry in the original K3.
> 
> Thanks,
> 
> -- Dave, N8SBE
> 
> Quoting Howard Saxion via Elecraft :
> 
>> I had a similar problem with my P3 with SVGA. I had to cycle through the 
>> on-off switch a few times before it would fully power up. Once powered up, 
>> everything was working and stable.  I tried reseating the ribbon cables but 
>> that had no effect.
>> 
>> I contacted Elecraft technical support and they had me try a few things but 
>> that did not solve the problem. I sent it to Elecraft and it turned out that 
>> the I/O board was faulty. The repair cost was approximately $200 for a new 
>> board and labor.
>> 
>> 73
>> Howard/WX7HS
>> 
 On Apr 12, 2021, at 06:05, Dave Cole  wrote:
>>> 
>>> Rick,
>>> 
>>> Thank you!  I appreciate the datapoint in this.  I was just looking over 
>>> the schematic and came to the same conclusion...  It looks like a backlight 
>>> problem to me as well...  I tried to find a datasheet on teh 4538 IC that 
>>> appears to control it, but alas, nope.  I got mine to come back on by power 
>>> cycling it as well...
>>> 
>>> Hopefully someone has actually fixed this, and knows which cap...
>>> 
>>> 73, and thanks,
>>> Dave (NK7Z)
>>> https://www.nk7z.net
>>> ARRL Volunteer Examiner
>>> ARRL Technical Specialist, RFI
>>> ARRL Asst. Director, NW Division, Technical Resources
>>> 
 On 4/12/21 5:27 AM, Rick Stanback wrote:
 My P3 does the same thing.  If i keep cycling power it eventually comes
 on and works.  I suspect there is a bad capacitor in the LCD backlight
 power.  I have not actually looking into it yet.
>>> 
>>> __
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>> 
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Re: [Elecraft] P3 Failure, and question

[Dave New]

 Do you know just what failed on the I/O board?  Was it possibly due  
to static discharge?


I tend to leave an antenna connected, except during active weather,  
but curious if there is something sensitive in the P3 I/O area that  
can fail easily from a surge, like the old RS-232 circuitry in the  
original K3.


Thanks,

-- Dave, N8SBE

Quoting Howard Saxion via Elecraft :

I had a similar problem with my P3 with SVGA. I had to cycle  
through the on-off switch a few times before it would fully power  
up. Once powered up, everything was working and stable.  I tried  
reseating the ribbon cables but that had no effect.


I contacted Elecraft technical support and they had me try a few  
things but that did not solve the problem. I sent it to Elecraft and  
it turned out that the I/O board was faulty. The repair cost was  
approximately $200 for a new board and labor.


73
Howard/WX7HS


On Apr 12, 2021, at 06:05, Dave Cole  wrote:

Rick,

Thank you!  I appreciate the datapoint in this.  I was just looking  
over the schematic and came to the same conclusion...  It looks  
like a backlight problem to me as well...  I tried to find a  
datasheet on teh 4538 IC that appears to control it, but alas,  
nope.  I got mine to come back on by power cycling it as well...


Hopefully someone has actually fixed this, and knows which cap...

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources


On 4/12/21 5:27 AM, Rick Stanback wrote:
My P3 does the same thing.  If i keep cycling power it eventually comes
on and works.  I suspect there is a bad capacitor in the LCD backlight
power.  I have not actually looking into it yet.


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Re: [Elecraft] P3 Failure, and question

[Dave Cole]

Thanks Howard, I'll call you later today...

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 4/12/21 7:05 AM, Howard Saxion wrote:

I had a similar problem with my P3 with SVGA. I had to cycle through the 
on-off switch a few times before it would fully power up. Once powered up, 
everything was working and stable.  I tried reseating the ribbon cables but 
that had no effect.

I contacted Elecraft technical support and they had me try a few things but 
that did not solve the problem. I sent it to Elecraft and it turned out that 
the I/O board was faulty. The repair cost was approximately $200 for a new 
board and labor.

73
Howard/WX7HS



On Apr 12, 2021, at 06:05, Dave Cole  wrote:

Rick,

Thank you!  I appreciate the datapoint in this.  I was just looking over the 
schematic and came to the same conclusion...  It looks like a backlight problem 
to me as well...  I tried to find a datasheet on teh 4538 IC that appears to 
control it, but alas, nope.  I got mine to come back on by power cycling it as 
well...

Hopefully someone has actually fixed this, and knows which cap...

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources


On 4/12/21 5:27 AM, Rick Stanback wrote:
My P3 does the same thing.  If i keep cycling power it eventually comes
on and works.  I suspect there is a bad capacitor in the LCD backlight
power.  I have not actually looking into it yet.

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Re: [Elecraft] P3 Failure, and question

[Dave Cole]

Hi Dave New,

It does help, and thank you... Mine has come back to life as well, 
(power cycling it), and I am worried about turning it off now as well...


I will get an RSA from Elecraft and send it in...  I'll report back to 
the list what they find, and how long it took to get repaired.


If you discover the issue, please let me know if you would!  I won't be 
sending mine back tomorrow, but sooner than later.  Also, THANK YOU 
again for the information.


73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 4/12/21 6:39 AM, Dave New wrote:
  I've been experiencing intermittent failures of the internal display, 
as well as loss of at least one setting (Track/Fix).


I've been leaving the K3s/P3 powered on continuously, but recently 
started turning them off, to save some 'always on' energy while trying 
to figure out why our house is running about 1200 watts continuously.


So, when powering on the combination (the P3 is set to power on with the 
K3s power), very nearly always now, the internal display fails to come 
on, but the SVGA display always works.  Normally, cycling the power 
switch on the P3 recovers the internal display, but just yesterday, I 
had to cycle the power several times before it came up.


I'm now leaving things powered on, until I can troubleshoot what the 
issue is.  I did go as far as looking in the P3 manual to see if there 
is a coin cell battery in it, that might need replacing, but that is 
apparently not so.


I'm concerned about the loss of settings, which may point to a corrupted 
EEPROM.  Reflashing the P3 hasn't fixed this, and so far, I've not tried 
a 'factory reset' on the P3, which would lose all my settings.


Hope that helps,

-- Dave, N8SBE

Quoting Dave Cole :


Rick,
A further thought on this...  Next time your P3 fails, can you try and 
grab an image from it using the utility?  I just thought of that, mine 
will not grab an image, when it is failed, so it is probably not the 
backlight on mine.


73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 4/12/21 6:03 AM, Dave Cole wrote:

Rick,

Thank you!  I appreciate the datapoint in this.  I was just looking 
over the schematic and came to the same conclusion...  It looks like 
a backlight problem to me as well...  I tried to find a datasheet on 
teh 4538 IC that appears to control it, but alas, nope.  I got mine 
to come back on by power cycling it as well...


Hopefully someone has actually fixed this, and knows which cap...

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 4/12/21 5:27 AM, Rick Stanback wrote:

My P3 does the same thing.  If i keep cycling power it eventually comes
on and works.  I suspect there is a bad capacitor in the LCD backlight
power.  I have not actually looking into it yet.


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Re: [Elecraft] P3 Failure, and question

[Howard Saxion via Elecraft]

I had a similar problem with my P3 with SVGA. I had to cycle through the 
on-off switch a few times before it would fully power up. Once powered up, 
everything was working and stable.  I tried reseating the ribbon cables but 
that had no effect. 

I contacted Elecraft technical support and they had me try a few things but 
that did not solve the problem. I sent it to Elecraft and it turned out that 
the I/O board was faulty. The repair cost was approximately $200 for a new 
board and labor.  

73
Howard/WX7HS 


> On Apr 12, 2021, at 06:05, Dave Cole  wrote:
> 
> Rick,
> 
> Thank you!  I appreciate the datapoint in this.  I was just looking over the 
> schematic and came to the same conclusion...  It looks like a backlight 
> problem to me as well...  I tried to find a datasheet on teh 4538 IC that 
> appears to control it, but alas, nope.  I got mine to come back on by power 
> cycling it as well...
> 
> Hopefully someone has actually fixed this, and knows which cap...
> 
> 73, and thanks,
> Dave (NK7Z)
> https://www.nk7z.net
> ARRL Volunteer Examiner
> ARRL Technical Specialist, RFI
> ARRL Asst. Director, NW Division, Technical Resources
> 
>> On 4/12/21 5:27 AM, Rick Stanback wrote:
>> My P3 does the same thing.  If i keep cycling power it eventually comes
>> on and works.  I suspect there is a bad capacitor in the LCD backlight
>> power.  I have not actually looking into it yet.
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Re: [Elecraft] P3 Failure, and question

[Dave New]

 I've been experiencing intermittent failures of the internal  
display, as well as loss of at least one setting (Track/Fix).


I've been leaving the K3s/P3 powered on continuously, but recently  
started turning them off, to save some 'always on' energy while trying  
to figure out why our house is running about 1200 watts continuously.


So, when powering on the combination (the P3 is set to power on with  
the K3s power), very nearly always now, the internal display fails to  
come on, but the SVGA display always works.  Normally, cycling the  
power switch on the P3 recovers the internal display, but just  
yesterday, I had to cycle the power several times before it came up.


I'm now leaving things powered on, until I can troubleshoot what the  
issue is.  I did go as far as looking in the P3 manual to see if there  
is a coin cell battery in it, that might need replacing, but that is  
apparently not so.


I'm concerned about the loss of settings, which may point to a  
corrupted EEPROM.  Reflashing the P3 hasn't fixed this, and so far,  
I've not tried a 'factory reset' on the P3, which would lose all my  
settings.


Hope that helps,

-- Dave, N8SBE

Quoting Dave Cole :


Rick,
A further thought on this...  Next time your P3 fails, can you try  
and grab an image from it using the utility?  I just thought of  
that, mine will not grab an image, when it is failed, so it is  
probably not the backlight on mine.


73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 4/12/21 6:03 AM, Dave Cole wrote:

Rick,

Thank you!  I appreciate the datapoint in this.  I was just looking  
over the schematic and came to the same conclusion...  It looks  
like a backlight problem to me as well...  I tried to find a  
datasheet on teh 4538 IC that appears to control it, but alas,  
nope.  I got mine to come back on by power cycling it as well...


Hopefully someone has actually fixed this, and knows which cap...

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 4/12/21 5:27 AM, Rick Stanback wrote:

My P3 does the same thing.  If i keep cycling power it eventually comes
on and works.  I suspect there is a bad capacitor in the LCD backlight
power.  I have not actually looking into it yet.


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Re: [Elecraft] P3 Failure, and question

[Dave Cole]

Rick,
A further thought on this...  Next time your P3 fails, can you try and 
grab an image from it using the utility?  I just thought of that, mine 
will not grab an image, when it is failed, so it is probably not the 
backlight on mine.


73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 4/12/21 6:03 AM, Dave Cole wrote:

Rick,

Thank you!  I appreciate the datapoint in this.  I was just looking over 
the schematic and came to the same conclusion...  It looks like a 
backlight problem to me as well...  I tried to find a datasheet on teh 
4538 IC that appears to control it, but alas, nope.  I got mine to come 
back on by power cycling it as well...


Hopefully someone has actually fixed this, and knows which cap...

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 4/12/21 5:27 AM, Rick Stanback wrote:

My P3 does the same thing.  If i keep cycling power it eventually comes
on and works.  I suspect there is a bad capacitor in the LCD backlight
power.  I have not actually looking into it yet.


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Re: [Elecraft] P3 Failure, and question

[Dave Cole]

Rick,

Thank you!  I appreciate the datapoint in this.  I was just looking over 
the schematic and came to the same conclusion...  It looks like a 
backlight problem to me as well...  I tried to find a datasheet on teh 
4538 IC that appears to control it, but alas, nope.  I got mine to come 
back on by power cycling it as well...


Hopefully someone has actually fixed this, and knows which cap...

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 4/12/21 5:27 AM, Rick Stanback wrote:

My P3 does the same thing.  If i keep cycling power it eventually comes
on and works.  I suspect there is a bad capacitor in the LCD backlight
power.  I have not actually looking into it yet.


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Re: [Elecraft] P3 Failure, and question

[Rick Stanback]

My P3 does the same thing.  If i keep cycling power it eventually comes
on and works.  I suspect there is a bad capacitor in the LCD backlight
power.  I have not actually looking into it yet.

-- 
"If you are not the lead dog, the scenary never changes"
Rick Stanback
N4WCQ


On Mon, 2021-04-12 at 04:41 -0700, Dave Cole wrote:
> A bit more data:
> 
> 1.  The (3 utility can talk to it.
> 2.  If I try and capture an image, it goes through the motions, but
> no 
> image is captured.
> 3.  It accepts commands via a keyboard.
> 4.  A load from the last config file did not correct things.
> 5.  A full power off and on did not correct things.
> 
> 73, and thanks,
> Dave (NK7Z)
> https://www.nk7z.net
> ARRL Volunteer Examiner
> ARRL Technical Specialist, RFI
> ARRL Asst. Director, NW Division, Technical Resources
> 
> On 4/12/21 4:27 AM, Dave Cole wrote:
> > Hello,
> > 
> > My P3 seems to have had a display failure.  The SVGA is working, as
> > I 
> > can control the K3 via macros fired at it via the keyboard input. 
> > It 
> > failed to light off once before, but that seemed a one off thing,
> > not it 
> > seems permanent.
> > 
> > Has anyone seen this before?  If so, what was the cause?
> > 
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Re: [Elecraft] P3 Failure, and question

[Dave Cole]

A bit more data:

1.  The (3 utility can talk to it.
2.  If I try and capture an image, it goes through the motions, but no 
image is captured.

3.  It accepts commands via a keyboard.
4.  A load from the last config file did not correct things.
5.  A full power off and on did not correct things.

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 4/12/21 4:27 AM, Dave Cole wrote:

Hello,

My P3 seems to have had a display failure.  The SVGA is working, as I 
can control the K3 via macros fired at it via the keyboard input.  It 
failed to light off once before, but that seemed a one off thing, not it 
seems permanent.


Has anyone seen this before?  If so, what was the cause?


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Re: [Elecraft] P3 Newbie needs help.

[Alan Bloom]

If the frequency display at the top center of the P3 screen is reading 
zero, then that implies there is something wrong with the RS-232 
connection between the K3 and the P3.  Recheck the connections on page 5 
of the P3 manual:


https://ftp.elecraft.com/P3/Manuals%20Downloads/E740152%20P3%20Owner's%20man%20Rev%20H1.pdf

The two-headed cable should plug into the two RS-232 connectors on the 
P3 in the order shown.  Make sure all the connectors are well-seated.


Alan N1AL


On 3/31/2021 2:49 PM, Richard Hayman wrote:

Just picked up K3s and P3 combo. The K3s had just been returned from Elecraft 
service and seems to be working perfectly. I am replacing my old K3.

Anyway, in my rush to set everything up, I can’t figure out why I have no 
frequency display on the P3. Using USB connection to communicate to the both 
the P3 and K3s using the firmware utilities. All appears normal. So I assume 
RS-232 between the K3s and P3 is fully functional.

Gotta be something simple. Right?

73, Dick, WN3R
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Re: [Elecraft] P3 Newbie needs help.

[Harlan Sherriff via Elecraft]

Try a BNC jumper from IF out on the radio to IF in on the P3

Harlan
K4HES

Sent from my iPhone

> On Mar 31, 2021, at 4:52 PM, Richard Hayman  wrote:
> 
> Just picked up K3s and P3 combo. The K3s had just been returned from 
> Elecraft service and seems to be working perfectly. I am replacing my old K3.
> 
> Anyway, in my rush to set everything up, I can’t figure out why I have no 
> frequency display on the P3. Using USB connection to communicate to the both 
> the P3 and K3s using the firmware utilities. All appears normal. So I assume 
> RS-232 between the K3s and P3 is fully functional.
> 
> Gotta be something simple. Right?
> 
> 73, Dick, WN3R 
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Re: [Elecraft] P3 span changing

[Fred Jensen]

Hi Alan,

Cool undocumented feature!  Guessed that FN5="MENU".  How do I get back 
to normal ... other than powering down?  I generally do not send P3 
commands, it seems to stay in sync with the K3 by itself, but do often 
have need to see what my program is sending to the K3, or getting back 
from the K3.  I'll paste your email into my station notebook.  And, yes, 
it's in MCU 1.60


73,

Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

On 2/8/2021 4:07 PM, Alan Bloom wrote:
There is a little-known serial debug monitor in the P3 that shows the 
traffic on the two RS-232 ports.  You activate the function by 
simultaneously holding the DISPLAY/AVERAGE and FN1/FN5 buttons. The P3 
screen changes to show RS-232 traffic color-coded to show on which 
port and in which direction the traffic is going.


The data can fly by awfully fast when using a logging program. You can 
freeze the screen immediately after a band change by tapping the FN2 
key.  Tap it again to unfreeze the screen.  If you want to show more 
data you can choose a smaller font size with the MENU > Font feature.


I'm pretty sure that feature still exists in current P3 code.  I can't 
check this myself since all my ham equipment was recently lost in a fire.


Alan N1AL


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Re: [Elecraft] P3 span changing

[w4sc]

I have observed very similar occurrences.  For example changing bands, if the 
center frequency  was previously tuned to 10.000.00 MHz with a span of 20KHz, 
then changing to another band, say 20M or 40M, then back to 30M (10MHz), the 
center frequency will briefly appear in the upper left corner of the P3 
display, as well as in the center of the display.  It then corrects, with the 
proper  LH-CENTER-RH ( 9.990.00 – 10.000.00 – 10.010.00 ) displayed.  
Occasionally the display will show   ( 10.000.00 – 10.000.00 – 10.010.00 ) and 
not correct the display. Also the FILTER BAND PASS will appear on the left side 
of the display, remaining there.   All of the communication to the P3 in this 
case is from the K3S.  I have no computer or other device connected to the 
K3S/P3.  Initiating a “CENTER” command via the P3 “BUTTON” will usually correct 
the issue……

Ben W4SC

Sent from Mail for Windows 10

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Re: [Elecraft] P3 span changing

[Alan Bloom]

If you return to a band but at a different K3 VFO frequency, the new 
frequency may be outside the P3's span.  If that happens, the P3 will 
re-tune using an algorithm determined by the MENU > FixMode setting.


If you want to be sure the P3 frequency doesn't change you can set 
FixMode to "Static".  Then the P3 frequency range will not change even 
if the K3 VFO frequency is out of range.


It may be that some logging programs do not retain the old frequency 
upon a band change.  Even if the frequency is "wrong" only for an 
instant, that would be enough to confuse the P3 if not in "Static" mode.


It would be interesting to see what N1MM and other logging programs are 
sending to the P3/K3 on band changes.  There is a little-known serial 
debug monitor in the P3 that shows the traffic on the two RS-232 ports.  
You activate the function by simultaneously holding the DISPLAY/AVERAGE 
and FN1/FN5 buttons.  The P3 screen changes to show RS-232 traffic 
color-coded to show on which port and in which direction the traffic is 
going.


The data can fly by awfully fast when using a logging program.  You can 
freeze the screen immediately after a band change by tapping the FN2 
key.  Tap it again to unfreeze the screen.  If you want to show more 
data you can choose a smaller font size with the MENU > Font feature.


I'm pretty sure that feature still exists in current P3 code.  I can't 
check this myself since all my ham equipment was recently lost in a fire.


Alan N1AL


On 2/8/2021 4:05 PM, Jim McDonald wrote:

I use the Fixed Tune Mode too but the center frequency sometimes isn't 
remembered when returning to a previously-used band.  If it makes any 
difference, I'm usually using N1MM+ (often with Win4K3Suite) to control the 
radio.

73,  Jim N7US

-Original Message-
From: elecraft-boun...@mailman.qth.net  On 
Behalf Of Fred Jensen
Sent: Monday, February 8, 2021 16:45
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] P3 span changing

Don't understand your "follow option" question.  I run mine in Fixed Tune Mode 
which holds the span [i.e. edge frequencies] constant and the two VFO's show up as two 
vertical cursors in the spectrum display.  The cursors move as I tune, and when I go 
beyond the edge, the span shifts by the amount I've set in the menu ... I use a full 
span.  In the Tracking Mode, your receive frequency is always centered and the spectrum 
moves past it as you tune.

73,

Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

On 2/8/2021 2:34 PM, Dave Cole wrote:

How does one set the follow option, I just looked through the menu of
the P3, and don't see it.

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 2/8/21 12:39 PM, Fred Jensen wrote:

Yes, it has been discussed, and yes, that is the case.  It seems to
be most prevalent when returning to a band after moving off for a Q,
such as in NAQP's when the return is being commanded via CAT command.
In fairness to the Elecraft developers, it /*appears*/ that it is
attempting to put the frequency you are returning into the center-ish
part of the display which is not totally unreasonable.

73,

Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

On 2/7/2021 12:28 PM, Jim McDonald wrote:

I know this has been asked before but I don't remember the answer.
Isn't the P3 supposed to remember the span and center frequency from
band to band?  It seems to change center frequency even if the band
hasn't changed, but that may not be the case.

73,  Jim N7US


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Re: [Elecraft] P3 span changing

[Jim McDonald]

I use the Fixed Tune Mode too but the center frequency sometimes isn't 
remembered when returning to a previously-used band.  If it makes any 
difference, I'm usually using N1MM+ (often with Win4K3Suite) to control the 
radio.

73,  Jim N7US

-Original Message-
From: elecraft-boun...@mailman.qth.net  On 
Behalf Of Fred Jensen
Sent: Monday, February 8, 2021 16:45
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] P3 span changing

Don't understand your "follow option" question.  I run mine in Fixed Tune Mode 
which holds the span [i.e. edge frequencies] constant and the two VFO's show up 
as two vertical cursors in the spectrum display.  The cursors move as I tune, 
and when I go beyond the edge, the span shifts by the amount I've set in the 
menu ... I use a full span.  In the Tracking Mode, your receive frequency is 
always centered and the spectrum moves past it as you tune.

73,

Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

On 2/8/2021 2:34 PM, Dave Cole wrote:
> How does one set the follow option, I just looked through the menu of 
> the P3, and don't see it.
>
> 73, and thanks,
> Dave (NK7Z)
> https://www.nk7z.net
> ARRL Volunteer Examiner
> ARRL Technical Specialist, RFI
> ARRL Asst. Director, NW Division, Technical Resources
>
> On 2/8/21 12:39 PM, Fred Jensen wrote:
>> Yes, it has been discussed, and yes, that is the case.  It seems to 
>> be most prevalent when returning to a band after moving off for a Q, 
>> such as in NAQP's when the return is being commanded via CAT command.  
>> In fairness to the Elecraft developers, it /*appears*/ that it is 
>> attempting to put the frequency you are returning into the center-ish 
>> part of the display which is not totally unreasonable.
>>
>> 73,
>>
>> Fred ["Skip"] K6DGW
>> Sparks NV DM09dn
>> Washoe County
>>
>> On 2/7/2021 12:28 PM, Jim McDonald wrote:
>>> I know this has been asked before but I don't remember the answer. 
>>> Isn't the P3 supposed to remember the span and center frequency from 
>>> band to band?  It seems to change center frequency even if the band 
>>> hasn't changed, but that may not be the case.
>>>
>>> 73,  Jim N7US

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Re: [Elecraft] P3 span changing

[Dave Cole]

Make that after your move commands within the macros...

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 2/8/21 2:43 PM, Mike Flowers wrote:

There are apparently some issues with the P3 firmware retaining the frequency 
and center by band.

I reported one issue where the P3 would return to an entirely different band 
than the one commanded.  The head of FW for Elecraft confirmed this is a bug 
that needs fixing.   When that will happen, if ever, is anyone's guess with the 
K4, pandemic, etc.

In macros I write to change bands and frequency, I find that I must issue P3 
commands twice to have the P3 properly centered as I want it.   I issue the 
first set of P3 commands at the beginning of the macro string, and the second 
one near the end.  This works for me, so I no longer worry about this FW bug.

- 73 and good DX de Mike, K6MKF, NCDXC Secretary


-Original Message-
From: elecraft-boun...@mailman.qth.net  On Behalf Of Dave Cole
Sent: Monday, February 08, 2021 14:34
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] P3 span changing

How does one set the follow option, I just looked through the menu of the P3,
and don't see it.

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 2/8/21 12:39 PM, Fred Jensen wrote:

Yes, it has been discussed, and yes, that is the case.  It seems to be
most prevalent when returning to a band after moving off for a Q, such
as in NAQP's when the return is being commanded via CAT command.  In
fairness to the Elecraft developers, it /*appears*/ that it is
attempting to put the frequency you are returning into the center-ish
part of the display which is not totally unreasonable.

73,

Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

On 2/7/2021 12:28 PM, Jim McDonald wrote:

I know this has been asked before but I don't remember the answer.
Isn't the P3 supposed to remember the span and center frequency from
band to band?  It seems to change center frequency even if the band
hasn't changed, but that may not be the case.

73,  Jim N7US



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Re: [Elecraft] P3 span changing

[Dave Cole]

Are you adding delays after your move macros?  I had that problem, then 
added some delays, and all problems of that nature ended.


73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 2/8/21 2:43 PM, Mike Flowers wrote:

There are apparently some issues with the P3 firmware retaining the frequency 
and center by band.

I reported one issue where the P3 would return to an entirely different band 
than the one commanded.  The head of FW for Elecraft confirmed this is a bug 
that needs fixing.   When that will happen, if ever, is anyone's guess with the 
K4, pandemic, etc.

In macros I write to change bands and frequency, I find that I must issue P3 
commands twice to have the P3 properly centered as I want it.   I issue the 
first set of P3 commands at the beginning of the macro string, and the second 
one near the end.  This works for me, so I no longer worry about this FW bug.

- 73 and good DX de Mike, K6MKF, NCDXC Secretary


-Original Message-
From: elecraft-boun...@mailman.qth.net  On Behalf Of Dave Cole
Sent: Monday, February 08, 2021 14:34
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] P3 span changing

How does one set the follow option, I just looked through the menu of the P3,
and don't see it.

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 2/8/21 12:39 PM, Fred Jensen wrote:

Yes, it has been discussed, and yes, that is the case.  It seems to be
most prevalent when returning to a band after moving off for a Q, such
as in NAQP's when the return is being commanded via CAT command.  In
fairness to the Elecraft developers, it /*appears*/ that it is
attempting to put the frequency you are returning into the center-ish
part of the display which is not totally unreasonable.

73,

Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

On 2/7/2021 12:28 PM, Jim McDonald wrote:

I know this has been asked before but I don't remember the answer.
Isn't the P3 supposed to remember the span and center frequency from
band to band?  It seems to change center frequency even if the band
hasn't changed, but that may not be the case.

73,  Jim N7US



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Re: [Elecraft] P3 span changing

[Dave Cole]

That answered my question, thank you!

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 2/8/21 2:44 PM, Fred Jensen wrote:
Don't understand your "follow option" question.  I run mine in Fixed 
Tune Mode which holds the span [i.e. edge frequencies] constant and the 
two VFO's show up as two vertical cursors in the spectrum display.  The 
cursors move as I tune, and when I go beyond the edge, the span shifts 
by the amount I've set in the menu ... I use a full span.  In the 
Tracking Mode, your receive frequency is always centered and the 
spectrum moves past it as you tune.


73,

Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

On 2/8/2021 2:34 PM, Dave Cole wrote:
How does one set the follow option, I just looked through the menu of 
the P3, and don't see it.


73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 2/8/21 12:39 PM, Fred Jensen wrote:
Yes, it has been discussed, and yes, that is the case.  It seems to 
be most prevalent when returning to a band after moving off for a Q, 
such as in NAQP's when the return is being commanded via CAT 
command.  In fairness to the Elecraft developers, it /*appears*/ that 
it is attempting to put the frequency you are returning into the 
center-ish part of the display which is not totally unreasonable.


73,

Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

On 2/7/2021 12:28 PM, Jim McDonald wrote:
I know this has been asked before but I don't remember the answer. 
Isn't the P3 supposed to remember the span and center frequency from 
band to band?  It seems to change center frequency even if the band 
hasn't changed, but that may not be the case.


73,  Jim N7US


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Re: [Elecraft] P3 span changing

[Fred Jensen]

Don't understand your "follow option" question.  I run mine in Fixed 
Tune Mode which holds the span [i.e. edge frequencies] constant and the 
two VFO's show up as two vertical cursors in the spectrum display.  The 
cursors move as I tune, and when I go beyond the edge, the span shifts 
by the amount I've set in the menu ... I use a full span.  In the 
Tracking Mode, your receive frequency is always centered and the 
spectrum moves past it as you tune.


73,

Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

On 2/8/2021 2:34 PM, Dave Cole wrote:
How does one set the follow option, I just looked through the menu of 
the P3, and don't see it.


73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 2/8/21 12:39 PM, Fred Jensen wrote:
Yes, it has been discussed, and yes, that is the case.  It seems to 
be most prevalent when returning to a band after moving off for a Q, 
such as in NAQP's when the return is being commanded via CAT 
command.  In fairness to the Elecraft developers, it /*appears*/ that 
it is attempting to put the frequency you are returning into the 
center-ish part of the display which is not totally unreasonable.


73,

Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

On 2/7/2021 12:28 PM, Jim McDonald wrote:
I know this has been asked before but I don't remember the answer.  
Isn't the P3 supposed to remember the span and center frequency from 
band to band?  It seems to change center frequency even if the band 
hasn't changed, but that may not be the case.


73,  Jim N7US


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Re: [Elecraft] P3 span changing

[Mike Flowers]

There are apparently some issues with the P3 firmware retaining the frequency 
and center by band.

I reported one issue where the P3 would return to an entirely different band 
than the one commanded.  The head of FW for Elecraft confirmed this is a bug 
that needs fixing.   When that will happen, if ever, is anyone's guess with the 
K4, pandemic, etc.

In macros I write to change bands and frequency, I find that I must issue P3 
commands twice to have the P3 properly centered as I want it.   I issue the 
first set of P3 commands at the beginning of the macro string, and the second 
one near the end.  This works for me, so I no longer worry about this FW bug.

- 73 and good DX de Mike, K6MKF, NCDXC Secretary

> -Original Message-
> From: elecraft-boun...@mailman.qth.net  boun...@mailman.qth.net> On Behalf Of Dave Cole
> Sent: Monday, February 08, 2021 14:34
> To: elecraft@mailman.qth.net
> Subject: Re: [Elecraft] P3 span changing
> 
> How does one set the follow option, I just looked through the menu of the P3,
> and don't see it.
> 
> 73, and thanks,
> Dave (NK7Z)
> https://www.nk7z.net
> ARRL Volunteer Examiner
> ARRL Technical Specialist, RFI
> ARRL Asst. Director, NW Division, Technical Resources
> 
> On 2/8/21 12:39 PM, Fred Jensen wrote:
> > Yes, it has been discussed, and yes, that is the case.  It seems to be
> > most prevalent when returning to a band after moving off for a Q, such
> > as in NAQP's when the return is being commanded via CAT command.  In
> > fairness to the Elecraft developers, it /*appears*/ that it is
> > attempting to put the frequency you are returning into the center-ish
> > part of the display which is not totally unreasonable.
> >
> > 73,
> >
> > Fred ["Skip"] K6DGW
> > Sparks NV DM09dn
> > Washoe County
> >
> > On 2/7/2021 12:28 PM, Jim McDonald wrote:
> >> I know this has been asked before but I don't remember the answer.
> >> Isn't the P3 supposed to remember the span and center frequency from
> >> band to band?  It seems to change center frequency even if the band
> >> hasn't changed, but that may not be the case.
> >>
> >> 73,  Jim N7US
> >>
> >
> > __
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Re: [Elecraft] P3 span changing

[Dave Cole]

How does one set the follow option, I just looked through the menu of 
the P3, and don't see it.


73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 2/8/21 12:39 PM, Fred Jensen wrote:
Yes, it has been discussed, and yes, that is the case.  It seems to be 
most prevalent when returning to a band after moving off for a Q, such 
as in NAQP's when the return is being commanded via CAT command.  In 
fairness to the Elecraft developers, it /*appears*/ that it is 
attempting to put the frequency you are returning into the center-ish 
part of the display which is not totally unreasonable.


73,

Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

On 2/7/2021 12:28 PM, Jim McDonald wrote:
I know this has been asked before but I don't remember the answer.  
Isn't the P3 supposed to remember the span and center frequency from 
band to band?  It seems to change center frequency even if the band 
hasn't changed, but that may not be the case.


73,  Jim N7US



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Re: [Elecraft] P3 span changing

[Fred Jensen]

Yes, it has been discussed, and yes, that is the case.  It seems to be 
most prevalent when returning to a band after moving off for a Q, such 
as in NAQP's when the return is being commanded via CAT command.  In 
fairness to the Elecraft developers, it /*appears*/ that it is 
attempting to put the frequency you are returning into the center-ish 
part of the display which is not totally unreasonable.


73,

Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

On 2/7/2021 12:28 PM, Jim McDonald wrote:

I know this has been asked before but I don't remember the answer.  Isn't the 
P3 supposed to remember the span and center frequency from band to band?  It 
seems to change center frequency even if the band hasn't changed, but that may 
not be the case.

73,  Jim N7US



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