[Elecraft] K3 and sticking amp T/R relay

[Igor Sokolov]

I had similar problem.
The solution I use is the external TX delay circuit of 30 ms (adjustable) 
that utilizes 1 FET transistor, capacitor and couple of resistors. It is 
built into  connector body and plugs into ACC socket of K3. Now my T/R 
relays in the amp are safe.

73, Igor UA9CDC

----- Original Message ----- 
From: "briana" <alsopb at nc.rr.com>
To: <elecraft at mailman.qth.net>
Sent: Monday, October 29, 2012 4:01 AM
Subject: Re: [Elecraft] K3 and sticking amp T/R relay


> Do this at the risk of QSD CW.  Higher settings (>10ms) cause this.
> The bad keying is independent of internal or external keyer.
>
> It is a bug that has never been fixed in the K3.
>
> 73 de Brian/K3KO
>
>
> On 10/28/2012 3:23 PM, Don Wilhelm wrote:
>> Gary,
>>
>> The config menu TX DLY parameter will change the time from keydown to
>> the onset of RF.
>>
>> 73,
>> Don W3FPR
>>
>> On 10/28/2012 4:09 PM, Gary Smith wrote:
>>
>>> My question for here is; if the amp is not properly sequencing with
>>> the K3, what setting can I change within the K3 to provide more time
>>> for the amp's relays to close before the K3 transmits? I remember
>>> there was a feature to allow ms changes for QSK in the K3. How do I
>>> find that option? And should I decrease the MS time in the K3 or
>>> increase it to let the perhaps relay in the amp have time to close
>>> first to avoid hot switching?
>>>
>>>
>>>
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>
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