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List:       elecraft
Subject:    Re: [Elecraft] K3 auto power reduction
From:       Fred Jensen <k6dgw () foothill ! net>
Date:       2017-08-31 23:44:17
Message-ID: c3f5e210-b717-9afa-439f-8fbb704ba4cd () foothill ! net
[Download RAW message or body]

T amp tells the K3 that it is there and ON, and the K3 changes the 
power.  This happens through that fat cable between the AUX ports.  It 
might be communications on the AUXBUS, or a dedicated signal.  I don't 
know if Elecraft makes that protocol public or not but it wouldn't hurt 
to ask them directly.

73,

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

On 8/31/2017 3:24 PM, Roger D Johnson wrote:
> The KPA-500 (and probably the KPA-1500) will automatically reduce the
> power from the K3 to a predetermined level for proper drive and back to
> the level from the power control when the amp is off.
>
> Is there a way to invoke this magic with other amplifiers?
>
> 73, Roger N1RJ 

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