[Elecraft] Internal Antenna Tuner and SPE Expert AmplifierQuestions

[Charlie T, K3ICH]

The only possible situation where the connection you describe would function 
is when the INPUT SWR to your amp is not good.  This is a quite common 
method of matching HB amps where their input impedance isn't THAT bad and 
the builder doesn't want to bother with a separate set of switched input 
matching networks.  An external tuner, or one inside the amp, such as an LDG 
for example is used to match the tube(s).  However,  in order to do this, 
you have to let the input tuner do it's thing only when you have a good 50 
Ohm dummy load on the amp.  THEN, after the input is matched, you can switch 
in your real antenna & tuner and adjust it for best SWR to the antenna.  At 
this point, it is essential that the input auto tuner is NOT still trying to 
find a match.

73, Charlie k3ICH


----- Original Message ----- 
From: "Don Wilhelm" <w3fpr at embarqmail.com>
To: <elecraft at mailman.qth.net>
Sent: Monday, December 09, 2013 8:55 AM
Subject: Re: [Elecraft] Internal Antenna Tuner and SPE Expert 
AmplifierQuestions


> Mark,
>
> The short answer is no.
>
>