[Amps] HF Amp Loading Problem

[Richard]

>Dentron 10-160L Amp
>
>I have replaced the parasitic choke resistors in the amp as the resistors 
>were toasted.  Same value no mods to unit.  Repaired hv supply again no 
>mods.  Unit now works with reasonable output.  
>Problem follows:   I have to advance the loading control to max 
>capacitance to get near the full output on any band.  It runs out of 
>loading on all bands.
>
I would have a look at the bandswitch contacts.  Also, the output & input 
bandswitch wafers on some models were adjacent to each other on the same 
shaft, sans-shield.  IMO, this is not good engineering practice - unless 
one is trying to build a vhf oscillator.

cheers, Sam

-  R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K, 
www.vcnet.com/measures.  
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