[Elecraft] amp tune

[Doug Joyce]

Jeff:  Check also the keying requirements for your tube amp and ensure that
they are within the switching range of the K3 - i.e. 0 to +200Vdc and less
than 5 A.  Note that the K3 is not designed to key a negative voltage that
some of the old tube amps provided.

Good Luck

Doug,  VE3MV
K3/100  #2432

----- Original Message ----- 
From: "Dave G4AON" <elecraft at astromag.co.uk>
To: <elecraft at mailman.qth.net>
Sent: Saturday, March 28, 2009 4:19 PM
Subject: Re: [Elecraft] amp tune


> Jeff, sounds like you are connecting your linear keying line to "PTT IN"
> and not "KEY OUT" as you think you are... Check the connection.
>
> 73 Dave, G4AON
> K3/100 #80, Acom 1000
> ----------------------------------
>
> I'm trying to setup my K3 to tune my tube amp. I have TUN PWR set to 25
> watts. when I long press the tune button the K3 goes into transmit at the
> selected 25 watts, in CW mode, but the amp doesn't key. If I press the PTT
> on the mic the amp goes into tx. I must have a menu set wrong? The only
> connection to the amp (other then the coax!) is the RCA connector key out
on
> the K3. on Tuner is in bypass, ext ALC is OFF. Any ideas??
>
> 73 Jeff kb2m
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