[Elecraft] Turn on turn off transients

Bob K2TK at ptd.net
Tue May 1 16:27:27 EDT 2012


I have had the same issue as K6CG.  There is a "thump" or "spike" with the K3 on 
turn
on, I also use powered external speakers,  M Audio AV40's.  I have a master kill 
switch
that kills the shack with the exception of lights and clock.  Turn on of the 
master switch
and having left the accessories on was not the way to go.  Some still come on 
with the
"big" switch but the sequence of Big switch, Astron 13 volt PS, K3 & P3, and 
then the
external powered speakers  while not fixing the problem effectively buries it.  
Use the
same in reverse at shutdown.

Changing the sequence may be a simple solution.

73,
Bob
K2TK

On 5/1/2012 2:31 PM, Mike K2MK wrote:
> Hi Richard,
>
> Do you have the problem if you only use the internal speaker? Is your
> firmware up to date?
>
> 73,
> Mike K2MK
>
>
>
> Richard Thorpe-2 wrote
>> Is there any way to stop the tooth rattling turn on and turn off thump
>> from the K3? It can't be good to have a blast of DC go through my external
>> speakers I jump every time this happens.
>>
>> K6CG
>>
>




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