[Elecraft] K3 Macro to control KEY OUT

[Vic K2VCO]

That is exactly what I built into my homebrew amplifier and my SB-1000. It is an input 
that disables the key line if it doesn't see +12v. I use DIGOUT1 to turn on a transistor 
switch that applies the 12v to the amp.

On 5/31/2011 3:25 PM, Don Wilhelm wrote:
> Vic,
>
> I am going to lobby for an "Amp Inhibit" input in every amplifier that will accept exactly
> what your external relay driven by DIGOUT1 signal is doing. :-)
>
> IT does not have to place the amp in standby, it just opens the Key In line, and would be
> easily be done inside the amplifier. When the signal is present, the amp ignores the Key
> In line.
>
> 73,
> Don W3FPR
>
>
> On 5/31/2011 6:10 PM, Vic K2VCO wrote:
>> I use the DIGOUT1 line to enable my amp, as someone mentioned. It's reliable because you
>> can turn it on or off and not just change its state, as with some other parameters.
>>
>> You would be amazed at how much output you can get from a single 3-500Z (for a very short
>> time!) if you hit it with 110 watts of drive. I found out before implementing DIGOUT1, but
>> luckily the tube survived.
>>

-- 
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco/