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[AMPS] SB200 Retrofit

To: <>
Subject: [AMPS] SB200 Retrofit
From: (measures)
Date: Mon, 2 Oct 2000 18:06:21 -0700
>Hello all,
>I would like to rebuild the power supply/filter/rectifier board in my sb200,
>but am having problems finding the filter caps.  

Electrolytic caps are more compact than they were 30-yrars ago, so don't 
expect to find an exact replacement.  Odds are that you are going to wind 
up with more C  in a shorter case.  The main thing is to get 35 mm dia. 
units.  .  

>I know that Harbauch had
>such a replacement, but he is not offering them at this time.
>Would also like to replace the high voltage string of 3 resistors, but have
>heard that more lower value resistors would be better than a few of higher
>One final thing...The swr input to the amp seems a little high on 15 and 10
>meters.  Can the input circuit be tuned, I had heard that one should not
>fuss with this, or is there something else I might look at.

The input tuned circuit Q is too low for solid state radios.  You need a 
Q of c. 2.  
cheers, Mark

-  Rich..., 805.386.3734,  

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