Re: [Elecraft] P3: How to Get Frequency on top center of P3

[Don Wilhelm]

Mark,

Using the cabling shown on page 6 of the P3 manual, you must connect the 
computer to the P3 with an RS-232 cable or USB to serial adapter (not 
the K3S USB cable).

Also set the K3 menu RS-232 parameter to 38400 and NOT USB.
Be certain the P3 is also set to 38400 baud.

Again, pull the boot on the RJ-45 dongle back and push on the metal part 
of the plug to make certain it is fully seated.


If you switch to the K3S to computer USB cable, you must use the CBLP3Y 
cable between the K3S and the P3 as shown on page 5 of the P3 manual.


73,
Don W3FPR

On 5/23/2018 9:05 PM, Mark Wheeler wrote:

Don,

I have everything setup as shown on page 6 of the P3 manual. I am using the 
serial cable with the RJ-45 jack.  All connections appear tight. I am wondering 
if there are any setting on the K3S that need to be checked or set. Both the 
K3S and P 3 are brand new. The K3S is loaded with all available options except 
the 2 meter band option.

Thanks,
Mark
WU6R



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[Elecraft] Tuner ranges

[Michael K Bottles]

Is the tuner range of the K-3 and the KAT-500 the same?
They seem to tune the same antenna differently, (of course the K-3 is tuning 
through a bit more coax with both the KAT-500 and KPA-500 on standby.)
They are tuning a 250’ Doublet via a short coax run (10’) to an external 4:1 
current Balun, then via true 600 ohm open ladder line. 
(I tried a 1:1 Balun, but it did not have as great a range on 160 as using the 
4:1.)
The K-3 seems to have a bit more range than the KAT-500.
Is that to be expected?
73
Kim - K7IM
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Re: [Elecraft] KX3 station for sale

[David F. Reed]

Amplifier sold... revised below...


On 5/22/18 5:32 PM, David F. Reed wrote:


I am putting my KX3 station up for sale; its seems that my KX2 has 
replaced it in the portable use, and I just move my k3 to the other 
shack when I go there...


The station is operating perfectly, no smoking environment, very clean 
appearance; it has the following items:


*KX3**-F* (factory built) serial number 0620; has handle style
side plates, external HD heat sink and associated accessories below: *
*

*KXAT3* internal antenna tuner *
*

*KX3-2M-AT *internal 2m module to fit with antenna tuner installed

*KXFL3* Internal Dual-Passband Roofing Filter

*KXBC3 *Internal NiMH Charger / Real-Time Clock

*PX3-F *Panadapter for KX3; Assembled*
*


You will see that if you add them up new (not counting the external 
heat sink and end plates), before shipping you come to about $2500.


I would like to get $1,500 for it, shipping and insurance prepaid, 
within the US; PayPal preferred.


Please email me direct for inquiries; I can provide photos for serious 
inquiries, and if requested will provide my phone number off list.


Thank you for the bandwidth.

73 de Dave, W5SV




--

שָׁלום עֲלֵיכֶם - עֲלֵיכֶם שָׁלום

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Re: [Elecraft] No Tune Power Output While Split in Data Mode

[Michael Eberle]

Don,

WSJT-X has a feature that uses SPLIT to keep the audio frequencies in a 
more usable range.  For example if someone is calling CQ at 300 Hz on 
the waterfall, instead of trying to transmit a 300Hz audio tone, WSJT-X 
will tune VFO-B down 1 KHz, enable SPLIT, and transmit a 1300 Hz tone.  
I find that this keeps me from having to re-adjust the audio levels when 
operating near either end of the waterfall. Working SPLIT like this 
keeps your TX audio between 1500 and 2000 Hz.


73

Mike - KI0HA


On 5/23/2018 17:36, Don Wilhelm wrote:
When using DATA A or AFSK A, you are normally working from a waterfall 
display, and the computer application software can work SPLIT.  I do 
not see the need to operate SPLIT using VFO A and VFO B, but someone 
can enlighten me to why that is useful.


A different situation exists for those using FSK D, but I don't think 
that is what is being discussed.


73,
Don W3FPR

On 5/23/2018 6:25 PM, AL7CR wrote:

My K3S does this on all bands regardless of wheter it has been power
cycled.  Pressing the tune button while split in data mode keys the
transmitter but produces no output.  Do nothing else but cancel split
mode and pressing tune will then key the transmitter and produce normal
tune output.  I thought it was a strange feature ...

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Re: [Elecraft] New to Elecraft and my experience

[Jim Rhodes]

When I was assembling my K3 I droppped a pair of sidecutters on one of the
boards and knocked a surface mount cap off of the board. When I emailed
support telling them which cap I had lknocked they not only told me to go
ahead and make a temp repair with a leaded part AND sent me new board in
the mail with a return label for the original board. My cost $0.00. Nobody
does it better!

On Wed, May 23, 2018 at 3:40 PM, Al Lorona  wrote:

> Contrast your experience, James, with what happened recently when I
> purchased a kit on eBay from a seller in a country that now has the NSA
> observing me closely for collusion. When I emailed to tell the seller that
> two critical parts were missing from the kit, he replied that that was
> "rubbish" and told me flat out I didn't know what I was doing. Can you
> imagine Elecraft ever doing that? I can't either.
>
>
> Al  W6LX
>
>
>
>
> ___
>
> Wish more companies were like this!
>
>
> 73
>
> James
>
> KI0KN
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-- 
Jim K0XU
j...@rhodesend.net
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Re: [Elecraft] n00b Amp question

[Jack Brindle]

Almost, but not quite. Assuming the amplifier is linear (as are the Elecraft 
units), the amplifier will boost the signal by the multiplication factor of the 
amp, up to a maximum value.
For example, the KPA500 has about 13db of gain, so the output will be 13db 
above the input, up to about 700 watts. To put it another way, if 40 watts 
input gets 500 watts out,
then 4 watts in will give 50 watts out. There is a maximum input level for each 
amplifier (I believe 60 watts for the KPA500, but would have to check), and a 
maximum output value.

Don’t expect that any input will drive the amplifier to full output, but the 
output is indeed proportional to the input.

Hope this helps!

73,
Jack, W6FB

> On May 23, 2018, at 12:16 PM, Dennis Moore  wrote:
> 
> An amplifier boosts your radio's output power to the maximum power of the 
> amp. A 100 watt amplifier will put out a maximum of 100 watts (or 
> thereabouts). It does not add 100 watts to whatever your radio is putting out.
> 
> 73, Dennis NJ6G
> 
> 
> On 5/23/2018 12:07, richard kappler wrote:
>> Does a 100w amp ADD to your radio's output, or push it to 100w?
>> 
>> Asked another way, if I have a 100w radio set to full power, does a 100w
>> amp make output 200w, or does it stay at 100w?
>> 
> 
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Re: [Elecraft] P3: How to Get Frequency on top center of P3 (Mark Wheeler)

[Grant Youngman]

Have you tried doing a P3 reset as described on page 45 of the manual?  If that 
doesn’t work, I’d suspect the control cable from the K3S data connector to the 
P3 first.  Of course, there could be some other hardware problem in either box.

Elecraft support can probably walk you through troubleshooting.

Grant NQ5T
K3 #2091, KX3 #8342

> On May 23, 2018, at 9:14 PM, Mark Wheeler  wrote:
> 
> Both the P3 and K3S are brand new.  I have made all connections per page 6 of 
> the P3 owners manual. The K3S has all options installed except the 2 meter 
> band option.  I have confirmed all connectors are tight and I still do not 
> have the frequency at the top, or any of the other missing P3 
> options/functions available.
> 
> Are there any K3S settings that I need to confirm?  Any other ideas of why 
> this is not working?
> 
> Thanks.
> Mark
> WU6R 
> 
> 
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Re: [Elecraft] P3: How to Get Frequency on top center of P3 (Mark Wheeler)

[Mark Wheeler]

Both the P3 and K3S are brand new.  I have made all connections per page 6 of 
the P3 owners manual. The K3S has all options installed except the 2 meter band 
option.  I have confirmed all connectors are tight and I still do not have the 
frequency at the top, or any of the other missing P3 options/functions 
available.

Are there any K3S settings that I need to confirm?  Any other ideas of why this 
is not working?

Thanks.
Mark
WU6R 


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Re: [Elecraft] P3: How to Get Frequency on top center of P3

[Mark Wheeler]

Don,

I have everything setup as shown on page 6 of the P3 manual. I am using the 
serial cable with the RJ-45 jack.  All connections appear tight. I am wondering 
if there are any setting on the K3S that need to be checked or set. Both the 
K3S and P 3 are brand new. The K3S is loaded with all available options except 
the 2 meter band option.

Thanks,
Mark
WU6R 

> On May 23, 2018, at 1:37 PM, Don Wilhelm  wrote:
> 
> Mark,
> 
> Are you using the USB cable to connect the K3S to the computer?  If so, do 
> you have the CBLP3Y cable connected between the K3S RJ-45 jack and the P3 
> RS-232 connectors?  If you do have that cable, make certain the RJ-45 plug is 
> fully inserted.  You may have to pull back the cover and push the metal part 
> of the plug in completely - it must snap in.
> 
> If you do not have the CBLP3Y cable, you can use the RJ-45 to RS-232 cable 
> that comes with the K3S to connect to the P3, but you must set the K3S menu 
> to RS-232 rather than USB (use 38400 baud).  Connect to the PC from the 
> RS-232 connector on the P3.
> 
> 73,
> Don W3FPR
> 
>> On 5/22/2018 5:35 PM, Mark Wheeler wrote:
>> I am using the P3 with a K3S and cannot figure out how to get the VFO A 
>> frequency to appear at the top center of the P3. (My P3 is showing a “0” at 
>> the top center.)
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Re: [Elecraft] No Tune Power Output While Split in Data Mode

[Bob McGraw K4TAX]

Simple logic. One should (is supposed to) listen on the frequency before 
transmitting.  Can't do this if one is configured to receive on a different 
frequency. 

Bob, K4TAX


Sent from my iPhone

> On May 23, 2018, at 5:25 PM, AL7CR  wrote:
> 
> My K3S does this on all bands regardless of wheter it has been power
> cycled.  Pressing the tune button while split in data mode keys the
> transmitter but produces no output.  Do nothing else but cancel split
> mode and pressing tune will then key the transmitter and produce normal
> tune output.  I thought it was a strange feature ...
> Dean Shutt  AL7CR
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[Elecraft] New wierd K3s behavior

[C L Jonkers]

Seize the day. 

Seismic Science.




Sorry, wandering OT. 
 
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Re: [Elecraft] No Tune Power Output While Split in Data Mode

[Don Wilhelm]

When using DATA A or AFSK A, you are normally working from a waterfall 
display, and the computer application software can work SPLIT.  I do not 
see the need to operate SPLIT using VFO A and VFO B, but someone can 
enlighten me to why that is useful.


A different situation exists for those using FSK D, but I don't think 
that is what is being discussed.


73,
Don W3FPR

On 5/23/2018 6:25 PM, AL7CR wrote:

My K3S does this on all bands regardless of wheter it has been power
cycled.  Pressing the tune button while split in data mode keys the
transmitter but produces no output.  Do nothing else but cancel split
mode and pressing tune will then key the transmitter and produce normal
tune output.  I thought it was a strange feature ...

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[Elecraft] No Tune Power Output While Split in Data Mode

[AL7CR]

My K3S does this on all bands regardless of wheter it has been power
cycled.  Pressing the tune button while split in data mode keys the
transmitter but produces no output.  Do nothing else but cancel split
mode and pressing tune will then key the transmitter and produce normal
tune output.  I thought it was a strange feature ...
Dean Shutt  AL7CR
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Re: [Elecraft] When to use the preamp on the K3/K3S

[K9MA]

I make a deliberate choice to set the AGC threshold low, so I DO get AGC 
action on weak signals. Perhaps my ears just don't have the dynamic 
range they used to, but I find otherwise the strong signals are just 
uncomfortably loud.  Yes, I have to ride the RF gain to distinguish 
signals of different strengths, but I find that a fair trade-off.  Give 
the average age of hams these days, I doubt I'm the only one with such 
issues.  Of course, younger operators may want to treat their ears 
gently, to preserve that good dynamic range.


Note that high acoustic background noise can further reduce the 
difference between audible and painful.  The Radiosport headset is the 
best remedy I've found for that, short of putting the amplifier in 
another room.


73,
Scott K9MA


On 5/23/2018 15:37, Al Lorona wrote:

Scott,

If the weakest signals are already activating the AGC, that's the exact 
condition that leads to the many 'my K3 is noisy' complaints that we see here. 
Plus, that tends to make all signals sound like they're the same strength, 
another complaint we've heard in the past.

In fact, you don't want weak signals activating AGC. You want strong signals, 
above a certain threshhold (AGC THR on the K3) to activate it.

This gives you a nice, quiet linear region where weak signals sound weak, and 
stronger signals sound stronger.


In addition, overload should not determine whether you turn off the preamp! 
That's way bad advice.

Here's the general principle: you should only use as much gain as you need. AF 
as well as RF. Less is usually better. Your ears will not be blown by reducing 
your receiver gain.

R,

Al  W6LX



--
Scott  K9MA

k...@sdellington.us

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Re: [Elecraft] P3 SVGA - measuring occupied bandwidth

[Jim Brown]

On 5/23/2018 6:47 AM, Joe Subich, W4TV wrote:

The greater difficulty is in measuring the occupied bandwidth of very
narrow modes (e.g. JT65, JT9, FT8, RTTY or even CW) due to the 2 KHz
minimum span of the P3 ... a 500 Hz span would be better for measuring
narrow modes. 


Not so difficult at all, using the methods I outlined in a previous 
post. I have successfully used it on RTTY, CW, PSK31 an a steady 
carrier. Most of that data is summarized in this Power Point pdf. Most 
of these data are from the SVGA.


http://k9yc.com/P3_Spectrum_Measurements.pdf

Note -- TXEQ in my K3s are set maximum rolloff of the 50, 100, and 200 
Hz octave bands and some rolloff of the 400 Hz band. This accounts for 
the difference in the shape of the top of the curve between my K3s and 
other rigs tested.


73, Jim K9YC


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Re: [Elecraft] P3 SVGA - measuring occupied bandwidth

[Jim Brown]

On 5/23/2018 12:54 AM, Richard Lamont wrote:

Jim - in this context, are you using the definition of "occupied
bandwidth" as in ITU RR 1.153, i.e. 99% mean power? If so, how do you do
that with the P3 SVGA?


For CW, I transmit a long series of dits, put the P3 in peak mode, and 
accumulate peaks. When the display stops changing, I freeze it, use the 
cursor to manually log enough points to define the curve on both sides 
of the carrier, starting at -20dB carrier and every 5 dB until the data 
falls off screen. I then save the screen to a file.


I've done essentially the same thing with RTTY and PSK.  For SSB, my 
test signal is bandwidth limited Pink Noise. Pink Noise is widely used 
as an audio test signal because both spectral balance and dynamics are a 
good first approximation of speech. Pink Noise is defined as equal power 
per percentage bandwidth, whereas white noise is equal voltage per Hz. 
Pink noise can be though of as white noise with a 3dB per octave 
rolloff. That's not easy to generate -- an RC rolloff is 6 dB/octave.


And this important comment. NC0B uses White Noise as a source. This is 
VERY BAD practice, because it puts nearly all of the modulation above 
the voice spectrum, and greatly de-emphasizes speech. I've corrected him 
on this three times, first as long as five years ago, yet he continues 
to do it wrong. The importance of this is that GOOD audio processing is 
designed for the spectrum and dynamics of speech, so any audio test 
signal should approximate speech as closely as possible. Rob is a great 
engineer and does ham radio a great service with his testing, but he 
fails to even attempt to understand the difference between RF and audio.


As to my credentials to say this -- I spent 40 years in pro audio, with 
much of my work directed to sound systems for both speech 
intelligibility and music. For 20 years, I've been a member of the AES 
Standards Committee, and of Working Groups on Speech Intellibility. 
About ten years ago, I was elected a Fellow of the AES.


73, Jim K9YC

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Re: [Elecraft] When to use the preamp on the K3/K3S

[Don Wilhelm]

There are guidelines on my website www.w3fpr.com for how to set the 
K3/K3S AGC Threshold and Slope for best results.

See the "Noisy K3" article.

73,
Don W3FPR

On 5/23/2018 4:37 PM, Al Lorona wrote:

Scott,

If the weakest signals are already activating the AGC, that's the exact 
condition that leads to the many 'my K3 is noisy' complaints that we see here. 
Plus, that tends to make all signals sound like they're the same strength, 
another complaint we've heard in the past.

In fact, you don't want weak signals activating AGC. You want strong signals, 
above a certain threshhold (AGC THR on the K3) to activate it.

This gives you a nice, quiet linear region where weak signals sound weak, and 
stronger signals sound stronger.

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[Elecraft] P3 SVGA schematics and usb port

[Jim Shepherd]

Hi,
   The SVGA schematics were missing at
http://www.elecraft.com/manual/P3_svga_D_sch.pdf...
I was trying to see if the 5 Vdc was available at the keyboard port to
drive a SVGA to HDMI converter or if it needed to be turned on in software.
I could not find this information in the manual.

Other than not having power, plugging the video adapter in did not seem to
affect the operation of the P3, and when I plugged the adapter into a USB
power adapter, I got the full display on the monitor.  I'm looking at using
a split screen at an upcoming special event...

Jim W6US
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[Elecraft] Ed Re: KPA-1500 Question

[Dick via Elecraft]

Hi Ed,
 
Thanks for all the RTTY Qso's!
 
I read your post on the Elecraft reflector with interest.  I have two different 
sets of Bose QC-15 noise canceling headphones, and when I use either one, and 
running on CW or RTTY, the fan noise from my KPA-1500 is loud and annoying when 
the Fan hits level 2, and extremely loud and extremely annoying when the Fan it 
hits level 3.  It's hard for me to copy CW signals when the Fan hits level 3 
and extremely difficult to receive when the Fan hits level 4.    
 
Many people have complained that the Yaesu Quadra has noisy fans when 
transmitting and running at full speed, the fan noise from my KPA-1500 is 
louder at Fan level 2 than my Quadra fans are when operating at full speed.  
Also, when the KPA-1500 fans are at Level 2 the noise bleeds through my noise 
canceling headphones louder than the fan & blower noise from my Alpha 8410.
 
So either your noise canceling headphones work better than mine or your 
"field-test" KPA-1500 is a quieter than my production model.  Please advise 
what type of noise canceling headphones your using?
 
Thanks & 73,
Dick- K9OM
 
 

From: Ed W0YK 

Anecdotally,? I've operated several RTTY contests with a field-test KPA1500 and 
it just loafed along.? I didn't critically examine fan noise.? With 
noise-canceling headphones,? I wasn't aware of any fan noise.? Operationally, 
it felt like QRP, Wayne's target environment.?
73,Ed W0YK
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Re: [Elecraft] When to use the preamp on the K3/K3S

[Lyle Johnson]

In the K3/K3S/KX2/KX3, "RF Gain" adjusts receive path gain ahead of the 
AGC detector while "AF Gain" adjusts the receive path gain AFTER the 
AGC, if any, is applied.



73,

Lyle KK7P

... "RF Gain" in modern receivers really just sets the maximum gain 
the AGC will allow, so reducing it only attenuates weaker signals.


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Re: [Elecraft] New to Elecraft and my experience

[Al Lorona]

Contrast your experience, James, with what happened recently when I purchased a 
kit on eBay from a seller in a country that now has the NSA observing me 
closely for collusion. When I emailed to tell the seller that two critical 
parts were missing from the kit, he replied that that was "rubbish" and told me 
flat out I didn't know what I was doing. Can you imagine Elecraft ever doing 
that? I can't either.


Al  W6LX




___

Wish more companies were like this!


73

James

KI0KN
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Re: [Elecraft] When to use the preamp on the K3/K3S

[Al Lorona]

Scott,

If the weakest signals are already activating the AGC, that's the exact 
condition that leads to the many 'my K3 is noisy' complaints that we see here. 
Plus, that tends to make all signals sound like they're the same strength, 
another complaint we've heard in the past.

In fact, you don't want weak signals activating AGC. You want strong signals, 
above a certain threshhold (AGC THR on the K3) to activate it.

This gives you a nice, quiet linear region where weak signals sound weak, and 
stronger signals sound stronger.


In addition, overload should not determine whether you turn off the preamp! 
That's way bad advice.

Here's the general principle: you should only use as much gain as you need. AF 
as well as RF. Less is usually better. Your ears will not be blown by reducing 
your receiver gain.

R,

Al  W6LX
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Re: [Elecraft] n00b Amp question

[David Bunte]

Richard -

There are probably more technical responses than this, but I think the
simple answer is that if you have a 100W Solid State amp, and drive it with
100W you will likely either destroy something, or the system will self
protect and shut down. I know that with my K3 and KPA500 combo, I get 500
watts out with about 28 watts from the K3... if I raise the output power of
the K3 to a bit above 30 watts (maybe 32 or 33w), the amp 'faults' because
of excessive drive, so my 500 watts amp gives me 500 watts when driven by
an appropriate amount of RF. If it is additive, I am not aware of it.

I believe the answer is somewhat different if using a tube type amp in a
grounded grid configuration.

Dave - K9FN


On Wed, May 23, 2018 at 3:07 PM, richard kappler 
wrote:

> Does a 100w amp ADD to your radio's output, or push it to 100w?
>
> Asked another way, if I have a 100w radio set to full power, does a 100w
> amp make output 200w, or does it stay at 100w?
>
> --
> W2KAP
>
> In any given circuit, the most expensive part will always sacrifice itself
> to protect the fuse.
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Re: [Elecraft] n00b Amp question

[Dennis Moore]

An amplifier boosts your radio's output power to the maximum power of 
the amp. A 100 watt amplifier will put out a maximum of 100 watts (or 
thereabouts). It does not add 100 watts to whatever your radio is 
putting out.


73, Dennis NJ6G


On 5/23/2018 12:07, richard kappler wrote:

Does a 100w amp ADD to your radio's output, or push it to 100w?

Asked another way, if I have a 100w radio set to full power, does a 100w
amp make output 200w, or does it stay at 100w?



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[Elecraft] n00b Amp question

[richard kappler]

Does a 100w amp ADD to your radio's output, or push it to 100w?

Asked another way, if I have a 100w radio set to full power, does a 100w
amp make output 200w, or does it stay at 100w?

-- 
W2KAP

In any given circuit, the most expensive part will always sacrifice itself
to protect the fuse.
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Re: [Elecraft] P3: How to Get Frequency on top center of P3

[Fred Jensen]

As I said before, you have to have the serial connection between the P3 
and K3 functioning for fixed tune to work.  It has nothing to do with 
the BNC jumper from the 1st IF out.  If that's bad, the P3 screen will 
flat-line.


I have an A-B data switch in my serial cable.  When operating locally, 
the connection is PC --> P3 --> K3, and fixed tune works fine.  When 
operating remote to W7RN, the switch moves the K3 serial port to the 
RemoteRig RRC-1258, and the P3 is removed from the serial path.  It then 
shows "0" at the top center, and +/-10 at the edges [span is set to 20 
KHz], and of course, the cursor does not move when I tune.


The P3 is still on, looking at the 1st IF signal from my local K3 at 8 
MHz, and the K3 receiver, up to the first IF out, is still functioning 
on whatever band/frequency I was last on locally.  I can put the K3 on 
14030, go to the remote and transmit on 14030 and I will see myself from 
W7RN on the P3, and I can see the stronger signals around that 
frequency.  My local antenna is an HOA-compromise, and I don't see 
nearly as many as I can hear on the remote where the coefficient of 
aerial aluminum is very high, however.


I really miss the P3 when operating remote.  A K4 seems to be at the top 
[or perhaps the only thing] on everyone's list.  That may or may not 
exist, now or ever.  If Elecraft is looking for a new project, how about 
an accessory for the host station that will put the P3 and it's controls 
onto a 2-way TCP/IP stream and an accessory for the control station P3 
that will take that stream and pretend it's actually connected to the 
1st IF out in Virginia City Highlands.


Now, before everyone positions the mouse over "Reply to List" to tell me 
that there are products on the market that will stream the P3 video down 
to my PC, save the BW, I already know that.  There are controls on my 
local P3 which also need to work for the P3 to be useful.  And, I'm 
fairly addicted to Elecraft's definition of "system integration."  Come 
up with an "Elecraft-solution" to this and I'll buy S/N 1 for the 
station and myself.


73,

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

On 5/23/2018 10:02 AM, Nr4c wrote:

Check BNC cable.

Sent from my iPhone
...nr4c. bill



On May 22, 2018, at 5:35 PM, Mark Wheeler  wrote:

I am using the P3 with a K3S and cannot figure out how to get the VFO A 
frequency to appear at the top center of the P3. (My P3 is showing a “0” at the 
top center.)

Thanks,
Mark Wheeler
WU6R



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Re: [Elecraft] P3: How to Get Frequency on top center of P3

[Don Wilhelm]

Mark,

Are you using the USB cable to connect the K3S to the computer?  If so, 
do you have the CBLP3Y cable connected between the K3S RJ-45 jack and 
the P3 RS-232 connectors?  If you do have that cable, make certain the 
RJ-45 plug is fully inserted.  You may have to pull back the cover and 
push the metal part of the plug in completely - it must snap in.


If you do not have the CBLP3Y cable, you can use the RJ-45 to RS-232 
cable that comes with the K3S to connect to the P3, but you must set the 
K3S menu to RS-232 rather than USB (use 38400 baud).  Connect to the PC 
from the RS-232 connector on the P3.


73,
Don W3FPR

On 5/22/2018 5:35 PM, Mark Wheeler wrote:

I am using the P3 with a K3S and cannot figure out how to get the VFO A 
frequency to appear at the top center of the P3. (My P3 is showing a “0” at the 
top center.)

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Re: [Elecraft] How to set fix-tune display mode

[Nr4c]

Or:

PC-K3S-Y cable to P3 

Sent from my iPhone
...nr4c. bill


> On May 22, 2018, at 10:15 PM, Fred Jensen  wrote:
> 
> Is it interfaced to your K3 via the serial port?  The wiring is 
> PC-->P3-->K3
> 
> 73,
> 
> Fred ["Skip"] K6DGW
> Sparks NV DM09dn
> Washoe County
> 
>> On 5/22/2018 2:31 PM, Mark Wheeler wrote:
>> I just purchased a P3 to use with my K3S and I cannot figure out how to turn 
>> on fix tune mode. The menu toggle does not appear to work. Is there another 
>> way?
>> 
>> Thanks,
>> Mark
>> WU6R
>> 
> 
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Re: [Elecraft] P3: How to Get Frequency on top center of P3

[Nr4c]

Check BNC cable. 

Sent from my iPhone
...nr4c. bill


> On May 22, 2018, at 5:35 PM, Mark Wheeler  wrote:
> 
> I am using the P3 with a K3S and cannot figure out how to get the VFO A 
> frequency to appear at the top center of the P3. (My P3 is showing a “0” at 
> the top center.)
> 
> Thanks,
> Mark Wheeler
> WU6R
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Re: [Elecraft] K3 IF Out Question

[Wes Stewart]

Not a problem, as you have already observed.

Wes  N7WS

On 5/23/2018 9:17 AM, Rich wrote:
I have been playing with some SDRs and the IF out on the K3.   My SDR is about 
8ft from the radio, hence I am using about a 10ft coax cable from the IF Out 
to the SDR.


I got to wondering if the cable length is of any concern?

I would think not (at least at 10ft), but there are a bunch of smart folks on 
this list, so I thought I would throw the question out to the masses.


BTW - The setup is working fine.  I am just curious.

Rich

K3RWN 


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[Elecraft] K3 IF Out Question

[Rich]

I have been playing with some SDRs and the IF out on the K3.   My SDR is 
about 8ft from the radio, hence I am using about a 10ft coax cable from 
the IF Out to the SDR.


I got to wondering if the cable length is of any concern?

I would think not (at least at 10ft), but there are a bunch of smart 
folks on this list, so I thought I would throw the question out to the 
masses.


BTW - The setup is working fine.  I am just curious.

Rich

K3RWN

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Re: [Elecraft] DSP vs. non-DSP portable transceivers

[Fred Jensen]

"Good, Fast, Cheap ... choose two."

73,

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

On 5/23/2018 7:32 AM, Ignacy wrote:

To put it mildly, with progress in computing, the implementation in DSP is
easier, smaller, cheaper and mostly better. Programming is expensive.

Same with tube and SS amplifiers. Most likely, hardware-wise SS is easier,
cheaper and mostly better. Initial design and programming are expensive.

Average age of ham radios is around 65 (QST). Old "truths" die slowly.

Ignacy, NO9E



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Re: [Elecraft] KPA1500, First Contest

[Bill Stravinsky via Elecraft]

 Scott
Are you also getting temp fluctuations in xmit and how much?  Mine is dependant 
on the temp, at lower temps the fluctuation is less than if up at 60Cand mine 
only happens on 40 mtrs.  Spoke with an Elecraft engineer and this could 
possibly result in a mod surrounding the temp sensor.
BillK3WJV

On Wednesday, May 23, 2018, 10:22:01 AM EDT, K9MA  
wrote:  
 
 OK, just a CWT mini-test.  Max. temperature when running was 63 C, fan 
noise not an issue with Radiosport headset.  The flashing SWR lights, 
stopped in PTT mode.  Temperature jumping around when transmitting 
persists in PTT mode, but stable on receive.  Power gain seems to drift 
around a bit, probably temperature dependent, not a big deal.  (I'm 
pretty sure the K3 output is stable.)

73,

Scott K9MA

-- 
Scott  K9MA

k...@sdellington.us

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Re: [Elecraft] When to use the preamp on the K3/K3S

[K9MA]

The problem with simply reducing the gain is that the AGC may become 
ineffective, forcing the operator to increase audio gain on weak 
signals.  Then the strong signals can be loud enough to be 
uncomfortable, or even cause hearing damage.  I like to keep the gain 
high enough to get some AGC action on the weakest signals, and reduce 
"RF Gain" when necessary to distinguish stronger signals from weaker 
ones. "RF Gain" in modern receivers really just sets the maximum gain 
the AGC will allow, so reducing it only attenuates weaker signals.


That said, turning off the preamp and/or enabling the attenuator should 
be necessary only if strong signals are causing overload. Of course, if 
the receiver has enough gain for a low enough noise floor and good AGC 
operation on weak signals with the preamp off, there's no advantage in 
using it.


73,
Scott K9MA

On 5/23/2018 08:07, Bob McGraw K4TAX wrote:
One of the topics I've discussed with with noted engineers has to do 
with use of a Preamp and use of the Attenuator and use of the RF Gain 
control.   In general the optimum legacy receiver performance occurs 
when the receiver noise floor is some 10 db below band noise.  Being 
such,  how does one attain this?  If the no signal band noise is S-5 
or -97 dBm, and receiver noise floor is -133 dBm {i.e K3S}, this says 
one should use a combination to total  26 dB Attenuation and RF Gain 
reduction.   Certainly one would NOT want to have a Preamp engaged 
under these conditions. Likewise, if the band noise is -121 dBm or 
about S-1 and the receiver noise is -138 dBm  {Preamp engaged} one 
might wish to reduce the RF Gain a bit.


From experience and my observing other hams operations, many seem to 
think more gain is needed to hear or pull out weak signals from the 
noise.   I find the proper use of the Preamp and specially the correct 
amount of  Attenuation and RF Gain reduction, weak signals seem to pop 
out of the noise.


73

Bob, K4TAX



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--
Scott  K9MA

k...@sdellington.us

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Re: [Elecraft] DSP vs. non-DSP portable transceivers

[Ignacy]

To put it mildly, with progress in computing, the implementation in DSP is
easier, smaller, cheaper and mostly better. Programming is expensive. 

Same with tube and SS amplifiers. Most likely, hardware-wise SS is easier,
cheaper and mostly better. Initial design and programming are expensive.   

Average age of ham radios is around 65 (QST). Old "truths" die slowly. 

Ignacy, NO9E 



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[Elecraft] KPA1500, First Contest

[K9MA]

OK, just a CWT mini-test.  Max. temperature when running was 63 C, fan 
noise not an issue with Radiosport headset.  The flashing SWR lights, 
stopped in PTT mode.  Temperature jumping around when transmitting 
persists in PTT mode, but stable on receive.  Power gain seems to drift 
around a bit, probably temperature dependent, not a big deal.  (I'm 
pretty sure the K3 output is stable.)


73,

Scott K9MA

--
Scott  K9MA

k...@sdellington.us

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Re: [Elecraft] P3 SVGA - measuring occupied bandwidth

[Joe Subich, W4TV]

On 2018-05-23 3:54 AM, Richard Lamont wrote:
>
Jim - in this context, are you using the definition of "occupied 
bandwidth" as in ITU RR 1.153, i.e. 99% mean power? If so, how do you

do that with the P3 SVGA?


Whilst it's not completely accurate, it is very easy to approximate
the "occupied bandwidth" of reasonably strong signals using the P3.
Set average to maximum and look at the points 20 dB down on either
side.  This will over estimate the bandwidth of a signal depending
on the peak to average ratio of the given modulation (e.g., level of
clipping of an SSB signal) but still provides a useful first order
approximation.

The greater difficulty is in measuring the occupied bandwidth of very
narrow modes (e.g. JT65, JT9, FT8, RTTY or even CW) due to the 2 KHz
minimum span of the P3 ... a 500 Hz span would be better for measuring
narrow modes.

73,

   ... Joe, W4TV


On 2018-05-23 3:54 AM, Richard Lamont wrote:

On 22/05/18 19:57, Jim Brown wrote:


Yes. AND in the hands of a knowledgeable engineer/technician, a near
lab-quality test instrument, with a display that can easily be
calibrated to the signal level at the antenna input. I've used it to
measure occupied bandwidth of transmitted signals to precision of a few
Hz, and the SVGA board, with it's separate, higher res FFT, improves
that to one Hz.


Jim - in this context, are you using the definition of "occupied
bandwidth" as in ITU RR 1.153, i.e. 99% mean power? If so, how do you do
that with the P3 SVGA?

73,

Richard G4DYA

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[Elecraft] When to use the preamp on the K3/K3S

[Bob McGraw K4TAX]

One of the topics I've discussed with with noted engineers has to do 
with use of a Preamp and use of the Attenuator and use of the RF Gain 
control.   In general the optimum legacy receiver performance occurs 
when the receiver noise floor is some 10 db below band noise.  Being 
such,  how does one attain this?  If the no signal band noise is S-5 or 
-97 dBm, and receiver noise floor is -133 dBm {i.e K3S}, this says one 
should use a combination to total  26 dB Attenuation and RF Gain 
reduction.   Certainly one would NOT want to have a Preamp engaged under 
these conditions. Likewise, if the band noise is -121 dBm or about S-1 
and the receiver noise is -138 dBm  {Preamp engaged} one might wish to 
reduce the RF Gain a bit.


From experience and my observing other hams operations, many seem to 
think more gain is needed to hear or pull out weak signals from the 
noise.   I find the proper use of the Preamp and specially the correct 
amount of  Attenuation and RF Gain reduction, weak signals seem to pop 
out of the noise.


73

Bob, K4TAX



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Re: [Elecraft] New wierd K3s behavior

[Bob McGraw K4TAX]

Although I've not experienced this, with or without having run WSJT-X, I 
have experienced some software applications which do not correctly 
terminate and thus my leave an erroneous  command in the radio.    This 
can happen if the software application is running or open and the radio 
is powered down before the software application is closed.  This command 
may still be resident even after a power cycle of the radio.   I have 
always found it best to close any and all of the software application(s) 
before powering down the radio.  Having done this, most will make a 
clean exit.


73

Bob, K4TAX


On 5/22/2018 11:00 PM, Michael Eberle wrote:
Mine does this on 6 meters if SPLIT is enabled. Turning SPLIT off and 
then pressing TUNE it will put out power.  Turn SPLIT back on and TUNE 
will put out full power until the next power cycle of the radio.  
Strangely, it only happens on 6 meters.


I posted about it here before and was told it was probably an issue 
with WSJT-X which doesn't make sense because the radio behaves this 
way without WSJT-X even running on my computer.  I don't know how 
WSJT-X could change the K3 firmware.


Mike - KI0HA


On 5/22/2018 07:11, Jim Miller wrote:

When I turn on my K3s (and let it finish booting) and try pressing TUNE
(hold XMIT) I get a zero power indication rather than tune power if 
in DATA

A mode.

A quick trip to CW then hitting a few dits on the paddle produces the
expected 100w barefoot power.

Then returning to DATA A and TUNE and the expected tune power is 
emitted.


No idea why this would occur and it is a new thing. I have recently 
updated
to the latest beta firmware for the enhanced KPA1500 integration. 
Perhaps a

bug was introduced there?

Ideas?

Jim ab3cv
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Re: [Elecraft] New wierd K3s behavior

[Jim Miller]

That's it!

Have you reported this to Wayne?

jim ab3cv

On Wed, May 23, 2018 at 12:00 AM, Michael Eberle  wrote:

> Mine does this on 6 meters if SPLIT is enabled. Turning SPLIT off and then
> pressing TUNE it will put out power.  Turn SPLIT back on and TUNE will put
> out full power until the next power cycle of the radio.  Strangely, it only
> happens on 6 meters.
>
> I posted about it here before and was told it was probably an issue with
> WSJT-X which doesn't make sense because the radio behaves this way without
> WSJT-X even running on my computer.  I don't know how WSJT-X could change
> the K3 firmware.
>
> Mike - KI0HA
>
>
> On 5/22/2018 07:11, Jim Miller wrote:
>
>> When I turn on my K3s (and let it finish booting) and try pressing TUNE
>> (hold XMIT) I get a zero power indication rather than tune power if in
>> DATA
>> A mode.
>>
>> A quick trip to CW then hitting a few dits on the paddle produces the
>> expected 100w barefoot power.
>>
>> Then returning to DATA A and TUNE and the expected tune power is emitted.
>>
>> No idea why this would occur and it is a new thing. I have recently
>> updated
>> to the latest beta firmware for the enhanced KPA1500 integration. Perhaps
>> a
>> bug was introduced there?
>>
>> Ideas?
>>
>> Jim ab3cv
>> __
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>>
>>
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[Elecraft] P3 SVGA - measuring occupied bandwidth

[Richard Lamont]

On 22/05/18 19:57, Jim Brown wrote:

> Yes. AND in the hands of a knowledgeable engineer/technician, a near
> lab-quality test instrument, with a display that can easily be
> calibrated to the signal level at the antenna input. I've used it to
> measure occupied bandwidth of transmitted signals to precision of a few
> Hz, and the SVGA board, with it's separate, higher res FFT, improves
> that to one Hz.

Jim - in this context, are you using the definition of "occupied
bandwidth" as in ITU RR 1.153, i.e. 99% mean power? If so, how do you do
that with the P3 SVGA?

73,

Richard G4DYA

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