[Elecraft] KX3 2m: how to get +TX voltage during transmission?

2015-07-03 Thread Jack F6AJW 

Hello All Elecrafters,

I have a KX3 2m; I don't know how to configurate it in order to command 
DB6NT microwave transverters needing +TX voltage present on SMA 
connector during transmit? KX3 has already last firmware loaded.


Thanks in advance for your explanations. 73's.

Jacques F6AJW / Paris


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Re: [Elecraft] KX3 2m: how to get +TX voltage during transmission?

2015-07-04 Thread Jack F6AJW 
Great! It works! Thank you Fred for valuable info! Thank also to Mat for 
advise (usable on BNC out for lower frequencies like IF on 28 or 50 MHz) .


So, I will be QRV this afternoon (despite heat wave: 35°C!) on 10 GHz 
with my KX3 as 2m IF (better than my usual FT-817ND on RX).


73's.

Jacques F6AJW/75

Le 03/07/2015 23:54, Cady, Fred a écrit :

Here ya go:

When in the 2M/4M menu, tap  2  to toggle between TX 5V- (the default) and TX 
5V+.  When TX 5V+ is enabled, 5 VDC (± 0.3 v at 0.1 mA) is applied to the 
center pin of ANT 2 when transmitting.  This can be used to switch or control 
external devices such as additional transverters that use 144 or 70 MHz as 
their IF.

Cheers and 73,
Fred KE7X

Author of:
"The Elecraft K3: Design, Configuration and Operation 2nd ed"
"The Elecraft KX3 - Going for the summit"
"The Elecraft KPA500 and KAT500 - the K-Line Dream Station"
Printed, coil bound copies of these are all available at www.elecraft.com
KPA500 and KAT500 Quick Set Up Guide
http://www.ke7x.com/home/k-line-introduction-and-set-up-guide
KAT500 and KXPA500 Tuner Operation
http://www.ke7x.com/home/kat500-and-kxpa100-tuners

"The Elecraft KXPA100, PX3 and 2M/4M Transverters - Assembling the KX3-Line 
Station" available at www.lulu.com.

"The Elecraft K3S and P3"  (A work in progress)


-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of
Matt Zilmer
Sent: Friday, July 03, 2015 11:47 AM
To: Jack F6AJW
Cc: Elecraft Reflector
Subject: Re: [Elecraft] KX3 2m: how to get +TX voltage during
transmission?

Maybe... Use a bias T with the DC feeding torwards the transverters?
The ACC2 keyline (p5, Owner's Manual) is pulled low during transmit and
could be used to activate a FET or bipolar switch to 12VDC.

73,
matt
W6NIA
On Fri, 3 Jul 2015 19:37:52 +0200, you wrote:


Hello All Elecrafters,

I have a KX3 2m; I don't know how to configurate it in order to

command

DB6NT microwave transverters needing +TX voltage present on SMA
connector during transmit? KX3 has already last firmware loaded.

Thanks in advance for your explanations. 73's.

Jacques F6AJW / Paris


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Re: [Elecraft] Hi Cur and Hi SWR using KX3 2 meter Module

2015-08-01 Thread Jack F6AJW 

 No text except title?

I have the same issue on my KX3-2m: "Hi-Current" blinking even on dummy 
load but 3 W output still available . Having a loose SMA connector , I 
had to open KX3 and extract 2m card in order to tighten SMA nut (very 
annoying!) . I found it was convenient to use a short piece of coax 
cable with SMA male connector and N female (or what you want) at the 
other end in order to avoid stress on SMA female on KX3 .


KX3-2M is very sensitive but a lot of birdies presents so this is not 
very compatible with weak signals reception, even using transverters in 
front adding noise masking the weakest ones compared to my IC-7400 and 
other transceivers . My DB6NT microwave transverters are well driven 
into TX using + TX available on SMA inner conductor; very good point! 
Another issue I have  is a sort of "microphone effect" in RX ; not sure 
this is the right words ?


Any help?

73's.

Jacques F6AJW/IN93EK



Le 01/08/2015 15:18, John Sager via Elecraft a écrit :

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Re: [Elecraft] K2 IF output

2017-02-13 Thread Jack F6AJW 

Sadly, Dave G4HUP is now SK .

73's.

Jacques F6AJW

Le 13/02/2017 à 20:02, Ken Chandler a écrit :

Contact G4HUP who makes various kits, I've one here.
See
http://G4hup.com.
The work is first class.

Ken.. G0ORH

Sent from my iPad



On 13 Feb 2017, at 17:43, Ken G Kopp  wrote:

Who makes a Clifton Labs Z1000B replacement for the K2?


On Feb 13, 2017 07:46, "Don Wilhelm"  wrote:

Ken,

Sorry, but I do not.
There is a ham in England who produces a buffer amplifier that can be
used, but I cannot recall who.
If you ask on the reflector for a Clifton Labs Z1B replacement, you
may get some hits.

73,
Don W3FPR


On 2/13/2017 9:20 AM, Ken G Kopp wrote:

GM Don!

Can / do you supply the IF output circuit for the K2?

73

Ken - K0PP

On Feb 13, 2017 07:15, "Don Wilhelm donw...@embarqmail.com  [KX3]" > wrote:

Bob,

Check out the Win4K3 software (http://va2fsq.com/spectrum-scopes/
). It
has support for the KX2 which allows the use of SDRPlay to produce a
panadapter display.

73,
Don W3FPR



On 2/13/2017 8:29 AM, rl3ja...@gmail.com
 [KX3] wrote:


So the question is - Has anyone been able to put together a viable
support system for signal analysis (aka - Panadapter?) that can

be used

directly with the KX2?


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Posted by: Don Wilhelm mailto:donw...@embarqmail.com>>


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[Elecraft] Problems with a 2m module on my KX3

2014-11-07 Thread Jack F6AJW 

Hello Elecrafters!

I am not too happy with a 2m module I have just installed on my KX3: lot 
of birdies, instabilities, microphone effects.


Any idea? Thanks in anticipation, 73's.

Jacques F6AJW
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Re: [Elecraft] Problems with a 2m module on my KX3

2014-11-08 Thread Jack F6AJW 

Hello Matt and all,

In fact, I performed my first tests using only a 144 MHz SMA whip 
antenna directy on my KX3 and it was not a good idea at all (high SWR, 
too close from KX3?)! Today, I put my KX3 +2m on a dummy load and it was 
far better this way but I still have birdies especially near 144.300 and 
385 (not checked else where yet) and as my main interest is weak signal 
this is not good for me. I found that power was only 2 Watts using my 
Bird 43 and 5W / 100 to 250 MHz slug; it is a bit low. I managed to make 
a QSO with a guy about 40km away using a 3 el. Beam on my balcony (good 
location here close to the Atlantic ocean) , starting with my IC-910H 
and then switching to KX2+2m. I got good audio quality report in SSB. 
S-meter indication was low (about S9 compared to 9+&( on my IC-910H 
without amplifier. I put Preamp in service but may be I could put some 
extra gain in the RX chain. KX3 is "leaking a bit" as I could hear it on 
my IC-910H; useful in order to put both transceiver on the same 
frequency ;-)


Tomorrow I will leave my vacation house in SW of France and move to 
Paris for a few months there so I need to stop my tests on KX3 + 2m for 
the moment. May be I will use it in Paris with a more decent antenna 
that whip I used first (in fact I would need a ground plane attached to 
KX3). I am affraid I will not manage to use KX3+2m the way I did long 
time ago with my IC-202 and internal whip antenna!?


Any commentary or experience?

73's.

Jacques F6AJW/IN93EK



 Le 08/11/2014 00:50, Matt VK2RQ a écrit :

The description below is a little vague, so hard to really comment.

- birdies: do you observe these with no antenna connected to the 2m SMA socket? 
On which frequencies? Is it consistent?

- instabilities: what exactly do you observe when you encounter one of these 
"instabilities"?

- microphone effects: I guess you probably don't mean microphonics. Maybe you mean some 
sort of RF pick by the microphone? Do you observe "microphone effects" when 
transmitting into a dummy load?

73, Matt VK2RQ


On 8 Nov 2014, at 9:17 am, Jack F6AJW  wrote:

Hello Elecrafters!

I am not too happy with a 2m module I have just installed on my KX3: lot of 
birdies, instabilities, microphone effects.

Any idea? Thanks in anticipation, 73's.

Jacques F6AJW
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Re: [Elecraft] Problems with a 2m module on my KX3

2014-11-08 Thread Jack F6AJW 

Typo: 9+15!  Sorry!

Jacques F6AJW/IN93EK

Le 08/11/2014 21:15, Jack F6AJW a écrit :

Hello Matt and all,

In fact, I performed my first tests using only a 144 MHz SMA whip 
antenna directy on my KX3 and it was not a good idea at all (high SWR, 
too close from KX3?)! Today, I put my KX3 +2m on a dummy load and it 
was far better this way but I still have birdies especially near 
144.300 and 385 (not checked else where yet) and as my main interest 
is weak signal this is not good for me. I found that power was only 2 
Watts using my Bird 43 and 5W / 100 to 250 MHz slug; it is a bit low. 
I managed to make a QSO with a guy about 40km away using a 3 el. Beam 
on my balcony (good location here close to the Atlantic ocean) , 
starting with my IC-910H and then switching to KX2+2m. I got good 
audio quality report in SSB. S-meter indication was low (about S9 
compared to 9+&( on my IC-910H without amplifier. I put Preamp in 
service but may be I could put some extra gain in the RX chain. KX3 is 
"leaking a bit" as I could hear it on my IC-910H; useful in order to 
put both transceiver on the same frequency ;-)


Tomorrow I will leave my vacation house in SW of France and move to 
Paris for a few months there so I need to stop my tests on KX3 + 2m 
for the moment. May be I will use it in Paris with a more decent 
antenna that whip I used first (in fact I would need a ground plane 
attached to KX3). I am affraid I will not manage to use KX3+2m the way 
I did long time ago with my IC-202 and internal whip antenna!?


Any commentary or experience?

73's.

Jacques F6AJW/IN93EK



 Le 08/11/2014 00:50, Matt VK2RQ a écrit :

The description below is a little vague, so hard to really comment.

- birdies: do you observe these with no antenna connected to the 2m 
SMA socket? On which frequencies? Is it consistent?


- instabilities: what exactly do you observe when you encounter one 
of these "instabilities"?


- microphone effects: I guess you probably don't mean microphonics. 
Maybe you mean some sort of RF pick by the microphone? Do you observe 
"microphone effects" when transmitting into a dummy load?


73, Matt VK2RQ


On 8 Nov 2014, at 9:17 am, Jack F6AJW  wrote:

Hello Elecrafters!

I am not too happy with a 2m module I have just installed on my KX3: 
lot of birdies, instabilities, microphone effects.


Any idea? Thanks in anticipation, 73's.

Jacques F6AJW
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Re: [Elecraft] KX3-2m CW problem

2014-11-21 Thread Jack F6AJW 

Sorry Paul, no answer to your problem with CW (not yet tried).
On my side, I am a bit disappointed with my KX3-2m because of low TX 
output (2W instead of 3 announced) and lot of birdies on dummy load in 
RX mode. When using an external antenna, noise level increases and some 
birdies disappear but not all especially on 144.400 MHz. Do not try to 
connect an antenna (flexible quarter wave in my case) directly on SMA 
socket, you will receive a lot of birdies so, no way to use my KX3-2m 
like I used to do at the end of 70's with my IC-202 transceiver and 
telescopic antenna.


Any way to cure my problems?

73's.

Jacques F6AJW/Paris


 Le 21/11/2014 18:05, paul hippenmeyer a écrit :

Hi all,

CW on 2m is a problem. Especially with speeds higher than 25 wpm the 
timing of the sidetone becomes very unregular (eg. continues keying of 
dots only). With an external keyer the problem seems to be even worse. 
QRQ CW sounds very dirty.


CW on HF bands is perfect.

Any others who can confirm this problem?

73, paul
hb9axl

MCU 2.25
DSP  1.30


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Re: [Elecraft] KX3-2m CW problem

2014-11-23 Thread Jack F6AJW 

Good evening /bonsoir Paul, Olli, Wayne and All,

Thank you for your comments. Here, output power is the same using 
internal batteries or external 13.8V in FM or SSB; here, I can perform 
precise power measurements up to 24 GHz. Thanks in anticipation, Wayne, 
for power improvement to come May be that a future software release 
will manage to also improve rejection of birdies too. For the moment, I 
have just tried with an external antenna 3 elements Yagi antenna located 
a few meters from KX3 and it was the same situation regarding internal 
birdies. Interesting to know what is the behaviour of 4m module compared 
to the 2m one?


73's.

Jacques F6AJW/ Paris

Le 22/11/2014 17:17, paul hippenmeyer a écrit :

Bonjour Jacques,

Merci pour votre reponse!

TX output 2W:
Do you apply enought supply voltage? Min 2.5W are specified with 
13.8VDC supply.


Birdies:
Yes, it has quite a few. But for my use this is much less tragic than 
the CW trouble. Hope you will find a solution for your usage.


Merci es 73, paul
hb9axl




Sorry Paul, no answer to your problem with CW (not yet tried).
On my side, I am a bit disappointed with my KX3-2m because of low TX
output (2W instead of 3 announced) and lot of birdies on dummy load in
RX mode. When using an external antenna, noise level increases and some
birdies disappear but not all especially on 144.400 MHz. Do not try to
connect an antenna (flexible quarter wave in my case) directly on SMA
socket, you will receive a lot of birdies so, no way to use my KX3-2m
like I used to do at the end of 70's with my IC-202 transceiver and
telescopic antenna.

Any way to cure my problems?

73's.

Jacques F6AJW/Paris


  Le 21/11/2014 18:05, paul hippenmeyer a ?crit :


Hi all,

CW on 2m is a problem. Especially with speeds higher than 25 wpm the
timing of the sidetone becomes very unregular (eg. continues keying of
dots only). With an external keyer the problem seems to be even worse.
QRQ CW sounds very dirty.

CW on HF bands is perfect.

Any others who can confirm this problem?

73, paul
hb9axl

MCU 2.25
DSP  1.30


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Re: [Elecraft] OT: Request for EMI/RF Interference Opinion

2014-12-04 Thread Jack F6AJW 
I am afraid that this way you will get a lot of birdies originated from 
KX3 itself. This is especially the case on 2m using an attached SMA 
whip. Any other experience or info on the way tu cure this!?


73's.

Jacques F6AJW

Le 03/12/2014 23:48, Gerry leary a écrit :

I say, put batteries in the KX three hook up a small piece of wire and walk 
around with it. Watch the estimator and find the noise peak and what it comes 
out of.

Sent from my iPhone this time


On Dec 3, 2014, at 2:37 PM, Mel Farrer via Elecraft  
wrote:

Ed,

First off, lets get some more specific info on how far out of the noise, 
stationary or moving, time of day etc. Whether you are in a rural area, down 
town, in other words, the electronic environment you live in.   I would love to 
see the screen shot, and an audio file will fill in more gaps.  Sorry you have 
the problem, but it is the modern times we live in.

Mel, K6KBE

  From: Ed G 
To: elecraft@mailman.qth.net
Sent: Wednesday, December 3, 2014 1:02 PM
Subject: [Elecraft] OT: Request for EMI/RF Interference Opinion


Hello,
 I'm looking for someone with some background in EMI or RF interference
to look at some very odd noise I am experiencing on 15 meters (it is heard
on my K3 and KX3).  I can send a spectrum analyzer screen shot and a small
audio file to help. After trying all the usual things and having no luck I
need to get some opinions from someone with more experience; thanks!
--Ed--



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[Elecraft] Unsubscribe.

2021-05-20 Thread Jack F6AJW 
Please unsubscribe ; KX3 sold.

Tanks es 73's.

Jacques F6AJW
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