[Amps] Which LDG Autotuner for Amp Input?

[TexasRF at aol.com]

Hi Paul, there is no reason the tuner "has" to be inside the amplifier is  
there? If so, maybe a tuner can be scavenged for the application.
 
When you pick a tuner, it needs to be a unit that retains the relay  
settings when turned off. Otherwise, it will be hunting as the amplifier input Z  
varies with speech waveforms etc.
 
There have been LDG models in the past used for QRP/portable work that  
operated this way to help conserve battery power. Their specs should cover this 
 issue.
 
73,
Gerald K5GW
 
 
 
In a message dated 10/9/2010 6:24:58 A.M. Central Daylight Time,  
paul at n1bug.com writes:

Lee  Buller wrote:
> But, I picked up the ARRL Handbook this morning on the  way to the 
"reading room" 
> and saw a project that used a commercial  auto tuner to do the job of the 
input 
> matching.  It is an LDG  autotuner they sell without a box.

This isn't in any of the Handbooks I  happen to own. I tried looking 
on LDG's web site but found no autotuner  without a box. Maybe it is 
a special order item? Does anyone have more  info on this?

I am looking for some way to get better SWR on my  homebrew amp 
input, and make it more consistent across all bands. It is a  
homebrew cathode driven 4CX1500B and I have no real idea what the 
tube  input impedance is. I opearate 99.9% CW so an autotuner might 
be an  attractive option *if* I can fit it in the box.

73,
Paul  N1BUG
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