[Elecraft] K3 transmit audio cuts out

[Adrian]

Keith, From your original post you seemed to say that the signal output
dropped whilst the K3 was still in TX,
 i.e. you say " during PTT transmit ". So was the TX indicator active during
"my transmit audio cutting out" ?

This would indicate no problem with the ptt, but the audio - signal circuit
chain, or rfi issues. Can you clarify please?

I guess Don interpreted your original post different to myself. I would test
sending dits into a DL for the same period to check
power level consistency before looking at other areas.

-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Keith Heimbold
Sent: Friday, 27 July 2012 10:53 PM
To: don at w3fpr.com
Cc: Elecraft Group
Subject: Re: [Elecraft] K3 transmit audio cuts out

Hi Don,

Thanks for the quick recommendation. I will give that a try this morning. 

I did a complete switch out of the headset, PTT switch and adapter and
experienced the same cutout. I did consider this being an RFI issue. I was
doing a bit more ragchewing then usual last night.

I will try your recommendations and report back.

Thanks,

Keith
AG6AZ

Sent from my iPhone please excuse typos

On Jul 27, 2012, at 5:48 AM, "Don Wilhelm" <w3fpr at embarqmail.com> wrote:

> Kieth,
> 
> In cases like that, the first things to check are the external cables - in
your particular case, the PTT.
> If you are using the mic jack PTT, try the one on the back panel - if that
cures the problem check your cables again.
> 
> The other possibility is that something happened in your antenna system
and you are experiencing RF feedback.  Run the K3 barefoot into a dummy load
- if the condition persists into a dummy load, then you can conclude that
the K3 might be to blame.
> 
> 73,
> Don W3FPR
> On 7/27/2012 8:36 AM, Keith Heimbold wrote:
>> While operating last night on 20m on my K3 serial 1391, I had an issue
with my transmit audio cutting out during PTT transmit. Also power output
simultaneously dropped out completely in mid sentence. I could see this both
on the power meter and hear it on monitor.
>> 
>> I currently use a Heil proset 4 and a heil hand switch with that rig. I
then decided to switched headsets and switch to my heil proset 5 and my foot
switch which is on my other K3 to determine if it was an issue with headset
/ PTT switch combination.  Upon transmitting it continued to cut out the
audio and power. I was alerted by the ham I was communicating with that I
was having an issue with my audio.  This issue continued to persist so I
decided to shutdown the system.
>> 
>> My configuration last night also consisted of this K3 unit being
connected to my Yaesu Quadra amplifier to my SteppIR three element Yagi. I
was operating at about 500W.
>> 
>> This is the first time I have had any issue with this K3 unit though I do
experience some unusual receive issues with spurious and higher noise levels
with this unit versus my other K3 and my KX3.
>> 
>> Turns out that I am coincidentally sending up my other K3 1526 to
Elecraft today for several mods and some additional features to be added. I
would like to get the older 1391 unit working before sending 1526 up north.
>> 
>> Any thoughts on what might be happening or troubleshooting options would
be great.
>> 
>> Thanks,
>> 
>> Keith
>> AG6AZ
>> 
>> 
>> 
>> Keith
>> 
>> Sent from my iPhone please excuse typos 
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