Re: [Elecraft] Cheap keyer paddle?

[Eric Norris]

I am also a big fan of the PortaPaddle and PortaPaddle II, using it with
all Elecraft portable rigs.  It weighs nothing, is nearly indestructible,
and is well made.

73 Eric WD6DBM

On Fri, Sep 18, 2020, 11:39 AM Fred Jensen  wrote:

> American Morse Equipment.  Obviously depends on your definition of
> "cheap," but I use their Porta-Paddle with my K2 in the field.
>
> 73,
>
> Fred ["Skip"] K6DGW
> Sparks NV DM09dn
>
>
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Re: [Elecraft] K3: KIO3 digital board failed (I think)

[Edward R Cole]

Working with Rob at Elecraft Service, I removed and checked the KIO3 
Digital I/F board and found L1 blown.  L2, L3, R12, and R13 are all 
good.  L1 is on the ground lead from the sub-D9 connector, pin 5 to 
ground in the K3.  Definitely blown as there is a carbon smudge next 
to L1.  I installed a wire jumper but still inoperational.


Going to return the entire KIO3 unit to Elecraft for repair.

73, Ed - KL7UW
  http://www.kl7uw.com
Dubus-NA Business mail:
  dubus...@gmail.com 


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Re: [Elecraft] KX3 SWR meter accuracy on 50 MHz?

[Wes]

There are so many variables here that it kind of defies analysis.  First of all, 
the KX3 uses a BNC connector. Almost always, as you have done, connecting to a 
good load, that will handle some power, probably requires adapting to type N.  A 
reasonable load might be something like a NARDA 366NM which has a VSWR spec of 
1.2:1.  I personally use a series of Narda 766 attenuators which are 1.1:1.  
Adding a typical BNC to type N adapter, Pasternack PE9002, which is rated at 
1.3:1.  (A lot of manufacturers like Amphenol don't even rate for VSWR)


Converting these two values to reflection coefficient, adding them (worst case) 
and converting back to VSWR gives 1.57:1. So the load could be the 1.5:1 that is 
measured.  But this is only a part of the issue.  The KX3 VSWR bridge has 
unknown directivity and sensitivity since it uses diodes at very low power.  
Furthermore, it's not driven by a good 50 ohm source, the amplifier output is 
unknown and there is a BPF in the circuit.  At the output side there are at 
minimum some relays before getting to the output spigot.


In summary, I wouldn't worry about it. If you really want to know what the load 
Z (antenna) is, measure it with an appropriate instrument calibrated with known 
standards.


Wes  N7WS


First, On 9/17/2020 7:36 PM, Drew Arnett wrote:

Tech support said they saw 1.5 to 1 on 50 MHz with their dummy load.
HF looked great, of course.  They didn't mention if they also used a
microwave load.  :-)

Best regards,

Drew
n7da

On Sun, Sep 13, 2020 at 2:20 AM Drew Arnett  wrote:

I did before shipping in for repair with a directional coupler.  Looked great.

On Sat, Sep 12, 2020 at 7:13 PM Nr4c  wrote:

Well, it depends on the “Dummy” load.  Have you swept the load with a good 
spectrum analyzer or VNA?  It may not be 50 ohms at 50 MHz



Sent from my iPhone
...nr4c. bill



On Sep 12, 2020, at 11:51 AM, Drew Arnett  wrote:

After getting my KX3 back from repair (before my next planned contest
operation, thanks!), I ran some measurements to both see how great the
repairs were and to get a new baseline for future measurements.  TX
efficiency problem was gone.

However, I'm left to wonder about the accuracy of the internal SWR
meter for 50 MHz.  Using a microwave dummy load of adequate power
rating and just a coaxial adapter, I measured the following:

14 MHz @ 1 W setting
VSWR 1.0 to 1 (per KX3)

28 MHz @ 1 W setting
VSWR 1.0 to 1

50 MHz @ 1 W setting
VSWR 1.5 to 1

50 MHz @ 4 W setting
VSWR 1.6 to 1

Not horrible.  Not great.

It's fine if it's not as accurate on 50 MHz.  I just want to know if
this is normal.  Has anyone else looked at that and can share what
they see?

Thanks and best regards,

Drew
n7da
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Re: [Elecraft] Remote control monitors

[Richard Allen]

Hi Martin,

I got that from the video except I missed the ‘Microsoft surface tablet’ part. 

Thanks,

Richard W5SXD 


> On Sep 18, 2020, at 4:21 PM, Martin Sole  wrote:
> 
> I recall, Microsoft surface tablet running Linux on a virtual machine, was 
> mentioned in a video some time back.
> 
> Martin 
> HS0ZED 
> 
> 
> Sent from my iPhone
> 
>> On 17 Sep 2020, at 23:46, Richard Allen  wrote:
>> 
>> Can someone please tell me what model pads are used in the Elecraft video 
>> from the Dayton 2019 show with Eric presiding?  iPads or something else?
>> 
>> Thanks, Richard W5SXD 
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Re: [Elecraft] Remote control monitors

[Martin Sole]

I recall, Microsoft surface tablet running Linux on a virtual machine, was 
mentioned in a video some time back.

Martin 
HS0ZED 


Sent from my iPhone

> On 17 Sep 2020, at 23:46, Richard Allen  wrote:
> 
> Can someone please tell me what model pads are used in the Elecraft video 
> from the Dayton 2019 show with Eric presiding?  iPads or something else?
> 
> Thanks, Richard W5SXD 
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Re: [Elecraft] Cheap keyer paddle?

[Jim H via Elecraft]

Hi,Here is a club link for a portable paddle.http://www.w8cso.org/teneke.php 73 
 Jim HK7SSS In a message dated 9/18/2020 11:41:51 AM Pacific Standard Time, 
k6...@foothill.net writes: 
On 9/17/2020 10:09 PM, Alan Bloom wrote:
> I am currently "sheltering in place" far from home and would like to set
> up a station here.  I'm an 11-hour drive from home so I need to buy all
> new accessories.
>
> I already have a good Vibroplex key paddle at home so I don't need
> another high-quality one.  The good ones seem to start at around $175,
> which is way more than I want to pay for temporary use.  I once made a
> homebrew paddle made out of bent aluminum sheet metal and a pair of
> micro switches for the dot and dash contacts. ("A Lightweight Homemade
> Keyer Paddle", QST, July 2009).  I was satisfied with that paddle, so
> you can see that I am not obsessive about "feel".
>
> So who makes a decent, inexpensive key paddle?  (By the way, I don't
> need the iambic feature, so a single-lever model would be fine.)
>
> Alan N1AL
>

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Re: [Elecraft] Cheap keyer paddle?

[Fred Jensen]

American Morse Equipment.  Obviously depends on your definition of 
"cheap," but I use their Porta-Paddle with my K2 in the field.


73,

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

On 9/17/2020 10:09 PM, Alan Bloom wrote:

I am currently "sheltering in place" far from home and would like to set
up a station here.  I'm an 11-hour drive from home so I need to buy all
new accessories.

I already have a good Vibroplex key paddle at home so I don't need
another high-quality one.  The good ones seem to start at around $175,
which is way more than I want to pay for temporary use.  I once made a
homebrew paddle made out of bent aluminum sheet metal and a pair of
micro switches for the dot and dash contacts. ("A Lightweight Homemade
Keyer Paddle", QST, July 2009).  I was satisfied with that paddle, so
you can see that I am not obsessive about "feel".

So who makes a decent, inexpensive key paddle?  (By the way, I don't
need the iambic feature, so a single-lever model would be fine.)

Alan N1AL



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Re: [Elecraft] KPA-1500/FlexRadio 6400

[Bob Wilson, N6TV]

Hi Mike,

This seems to be a duplicate post (see
http://elecraft.365791.n2.nabble.com/KPA-1500-FlexRadio-6400-td7665007.html),
though I'm not sure if your questions were fully answered the first time.

First, to search the archives of this reflector, go to
http://elecraft.365791.n2.nabble.com/Elecraft-f365791.topics.html and use
the search box, top right.

To get the KPA-1500 to track the exact frequency of the Flex (before you do
any transmitting), you need to set up a proper connection between the 3.5mm
stereo jack on the back of the KPA1500 labeled "XCVR SERIAL" and one of the
common USB Type A connectors on the back of the Flex.

   1. Use any of the following to make a serial connection between the two
   devices:
  - FTDI USB-to-Serial adapter + Elecraft KXSER cable
  - Elecraft KXUSB cable
  - Serial Box USB (https://bit.ly/S-BOX) + stock serial and stereo
  cables

  2. For amp. keying, connect an ordinary RCA male-to-male patch cable
   between the RCA connector on the back of the KPA1500 labeled "KEY IN" and
   the RCA connector on the back of the Flex labeled "TX1"

   3. In the KPA1500 Menu, set

   RADIO TYPE: SERIAL

   SERIAL SPEED XCVR: 9600
   RADIO POLL: ON
   4. In the FlexRadio SmartSDR Setup, select the new serial adapter that
   appears when connected to the back of the Flex
   *Settings | USB Cables*
 Cable Type:  *CAT*
 Source: *TX Slice*
 Auto-report:   *Disabled*
 Advanced: *9600,8,N,1*
 Flow Control:
*None **Settings | Radio Setup*
 Transmit tab
 RCA TX1:  5 ms
   Enabled

The KPA1500 and its tuner (if enabled) will now automatically track the
exact frequency of the Flex, and be keyed by the Flex when it goes into
transmit.  You can verify the frequency by setting TECH MODE to ENABLED in
the KPA1500 menu, then scroll the STATUS page of the KPA1500 LCD until you
see XCVR FREQ and TX COUNT displayed.  XCVR FREQ is the frequency reported
by the radio over the Serial connection.  TX COUNT is the approximate
frequency detected by the KPA1500's built-in frequency counter whenever you
transmit.

If you have trouble making this work, feel free to contact me directly.

73,
Bob, N6TV
https://bit.ly/Y-BOX
https://bit.ly/S-BOX



On Tue, Sep 15, 2020 at 4:33 PM Mike Stone  wrote:

> This is my first post.  I am not sure if or where the search function is
> located.
>
> I am running a KPA-1500 and a FlexRadio 6400.  The amplifier recognizes
> the band that the Flex is tuned to but it doesn’t recognize the frequency.
> Any help would be appreciated.  I am not technically proficient with either
> the Flex or the KPA-1500, so please keep it simple for me.
> Thanks
> Mike, N1VE
>
>
> Sent from Mail for Windows 10
>
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Re: [Elecraft] Cheap keyer paddle?

[CUTTER DAVID via Elecraft]

There is a new manufacturer advertising in Sprat magazine.  Model UMPP-1 is 
advertised bench model and there are others $60 to US.  Not quite "cheap" but 
very small and good for travelling. 
www.umpp-cw.com
gm0...@gmail.com

73 David G3UNA/G6CP


> On 18 September 2020 at 08:36 David Gilbert  wrote:
> 
> 
> 
> 
> There are several cheapies on eBay for about $35.  You'd probably need 
> to stick it down to something heavier because they look pretty light.
> 
> Dave   AB7E
> 
> 
> 
> On 9/17/2020 10:09 PM, Alan Bloom wrote:
> > I am currently "sheltering in place" far from home and would like to set
> > up a station here.  I'm an 11-hour drive from home so I need to buy all
> > new accessories.
> >
> > I already have a good Vibroplex key paddle at home so I don't need
> > another high-quality one.  The good ones seem to start at around $175,
> > which is way more than I want to pay for temporary use.  I once made a
> > homebrew paddle made out of bent aluminum sheet metal and a pair of
> > micro switches for the dot and dash contacts. ("A Lightweight Homemade
> > Keyer Paddle", QST, July 2009).  I was satisfied with that paddle, so
> > you can see that I am not obsessive about "feel".
> >
> > So who makes a decent, inexpensive key paddle?  (By the way, I don't
> > need the iambic feature, so a single-lever model would be fine.)
> >
> > Alan N1AL
> 
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Re: [Elecraft] XV222 RX is Dead, Need Advice

[Mark Adams]

Mike,

I’ve done some of these mods, but not all.

I replaced the MAR6 this morning and it now hears a little better, but the 
S-meter on the K3 is not moving. Q3 is next.

AND I JUST REMEMBERED!!!  When I was setting up the rover before the contest, I 
was keying all the equipment with the antennas attached to check power output, 
listen to local beacons, etc. The XV222 was receiving OK. I then transmitted 
and in a few seconds blew the 5A fuse in my WestMountain Radio distribution 
block. I intended on commenting it to a 10A PP connector but “missed”. I 
replaced the fuse and went roving. 

I wonder whether maybe that caused some TX energy to get back into the RX 
circuit? Oh well, the MAR6 is replaced and I’ll get a new ATF. 

The crazy thing is that I did not think of this until last night when I had 
everything on the bench. 

73,
Mark K2QO
FN03ra


> On Sep 17, 2020, at 10:54 PM, M Cresap  wrote:
> 
> Hi Mark
> 
> Yes, the XV432 transverter needed a few fixes to work reliably. NT4RT wrote 
> an excellent article on how to improve the performance of the XV432 (which I 
> see you have found already). My XV432 is extensively modified with my own 
> fixes, most of NT4RT's fixes, and K9YC's recommended "Pin 1 problem" fixes 
> (i.e. rebuild the back panel). 
> 
> For the XV222, the first thing I would do to hook up your noise generator to 
> the RF input and try to adjust R13 for about 250 mV on TP2. See if that 
> improves your ability to receive the noise generator. I found that the gain 
> varies a LOT as R13 is adjusted. Be careful not to mistakenly tweak R10, 
> which is nearby! Don't ask how I know that :-(
> 
> Let me know if that helps.
> 
> 73, Mike, W3IP
> 
> On Thursday, September 17, 2020, 10:29:59 PM EDT, Mark Adams 
>  wrote:
> 
> 
> Thanks Mike. I built this along with the XV432 a LONG time ago :-) The 432 
> unit had loads of issues. My rover partner, a EE grad from 1964 who designed 
> military radios and antennas for a living was not impressed with either of 
> these transverters, especially the XV432. For a hobby, he checks the math in 
> QEX articles. One time he told me that the author mis-applied Maxwell’s 
> equation and he ran his own set of differential equations to prove the point. 
> 
> On to the my results:
> 
> 
>> On Sep 17, 2020, at 9:44 PM, M Cresap > > wrote:
>> 
>> Take off the top cover of the transverter, check the voltage between TP2 and 
>> ground (should be between 200 to 275 millivolts). That measures part of the 
>> source voltage of Q3, the first receiver amplifier. 
> 
> 
> 65mV
> 
> 
>> 
>> Find R16 (a 120 ohm resistor) and measure the voltage to ground on each side 
>> of the resistor. One side should be 12 volts, the other should be about 5 
>> volts. That measures the series dropping resistor for U1, the second 
>> receiver amplifier. R16 will normally be very warm to the touch.
> 
> 
> 13.8 and 4.9V
> 
> 
>> 
>> If those measurements are correct, the problem is most likely elsewhere. 
>> 
>> You can check the condition of the local oscillator by measuring the voltage 
>> between TP1 and ground. It should be between 1.0 and 1.5 volts. 
> 
> 
> 0.92V
> 
> 
> Additionally, TP1 is 0.76V, not the minimum 1V.
> The output pin of U1 is 0V, not 3.0-6.0V.
> 
> 
> 
> 
>> 
>> 
>> 
>> 
>> On Thursday, September 17, 2020, 8:58:35 PM EDT, k2qo > > wrote:
>> 
>> 
>> During the recent September VHF contest I could only hear the absolute
>> strongest local stations on the XV222/K3 in my rover. It worked FB in June.
>> My XV432 worked just OK as usual. Stations told me I was the loudest signal
>> on the 222 band so the TX side is fine. 
>> 
>> I put it on the bench and connected my Elecraft N-Gen. When turned on I
>> could barely detect an increase in noise. Tried the same on my XV432 and it
>> went from S0/1 to a solid S9.
>> 
>> I'm guessing that I somehow blew up U1 (an ERA6) and/or Q3 (an ATF 34143). I
>> don't have a good scope, RF generator, or RF voltmeter but kinda think
>> replacing both will fix my XV. A bad relay is an option too.
>> 
>> Thoughts? I'd like to fix it to have for a spare as I plan on moving
>> non-BigE transverters for 222 and 432. 
>> 
>> 73,
>> Mark K2QO
>> NF2RS/R for the September VHF 
>> 
>> 
>> 
>> --
>> Sent from: http://elecraft.365791.n2.nabble.com/ 
>> 
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Re: [Elecraft] XV222 RX is Dead, Need Advice

[Mark Adams]

Thanks Don,

I had a MAR6 in stock and installed it after breakfast. There is now a 
noticeable change in RX noise with the noise bridge turned on, but nowhere near 
what is needed, so I’ll order a Q3. 

73,
Mark K2QO
FN03ra



> On Sep 18, 2020, at 12:23 AM, Don Wilhelm  wrote:
> 
> Mark,
> 
> Replacing those components will normally restore receive.
> 
> 73
> Don W3FPR
> 
> On 9/17/2020 8:57 PM, k2qo wrote:
>> During the recent September VHF contest I could only hear the absolute
>> strongest local stations on the XV222/K3 in my rover. It worked FB in June.
>> My XV432 worked just OK as usual. Stations told me I was the loudest signal
>> on the 222 band so the TX side is fine.
>> I put it on the bench and connected my Elecraft N-Gen. When turned on I
>> could barely detect an increase in noise. Tried the same on my XV432 and it
>> went from S0/1 to a solid S9.
>> I'm guessing that I somehow blew up U1 (an ERA6) and/or Q3 (an ATF 34143). I
>> don't have a good scope, RF generator, or RF voltmeter but kinda think
>> replacing both will fix my XV. A bad relay is an option too.

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Re: [Elecraft] Cheap keyer paddle?

[Barry]

You could use your keyboard with N1MM.  Won't cost you anything.

Barry W2UP



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Re: [Elecraft] Cheap keyer paddle?

[Rich NE1EE]

On 2020-09-17 23:09:-0600, Alan Bloom wrote:
>So who makes a decent, inexpensive key paddle?  (By the way, I don't
>need the iambic feature, so a single-lever model would be fine.) 
>
>Alan N1AL

I keep forgetting that this list is different from all the rest I sub to...the 
replies don't go to the list...not that this one needed to...

Depends on what you call cheap. I've used CWMorse to good advantage.  

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Re: [Elecraft] Cheap keyer paddle?

[kk4kfg]

I have been very happy with a key from CW Morse (cwmorse.us) in Texas.
The shipping was lightening fast and there should be one that would fot
your needs. The link is below if it works.


https://cwmorse.us/


73,
Aaron
kk4kfg

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Re: [Elecraft] Cheap keyer paddle?

[David Gilbert]

There are several cheapies on eBay for about $35.  You'd probably need 
to stick it down to something heavier because they look pretty light.


Dave   AB7E



On 9/17/2020 10:09 PM, Alan Bloom wrote:

I am currently "sheltering in place" far from home and would like to set
up a station here.  I'm an 11-hour drive from home so I need to buy all
new accessories.

I already have a good Vibroplex key paddle at home so I don't need
another high-quality one.  The good ones seem to start at around $175,
which is way more than I want to pay for temporary use.  I once made a
homebrew paddle made out of bent aluminum sheet metal and a pair of
micro switches for the dot and dash contacts. ("A Lightweight Homemade
Keyer Paddle", QST, July 2009).  I was satisfied with that paddle, so
you can see that I am not obsessive about "feel".

So who makes a decent, inexpensive key paddle?  (By the way, I don't
need the iambic feature, so a single-lever model would be fine.)

Alan N1AL


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[Elecraft] KPA500 Alignment after repair

[TL_Netvision]

Hello all,


I am about to replace myself the 2 FETs in the amp, praying for no other
damages.

Not being experienced on the subject at all, can anyone elaborate please on
the procedure to properly adjust & align the amp before usage? 


TIA & be safe

Isaac, 4Z1TL (4X2BESAFE)


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