[AMPS] SB200 Retrofit

[A P]

. . .and in order to acquire a Q of c. 2, you make the following
modifications to your SB200:


1.
2.
3.


Please fill in the blanks Rich. Simply stating a Q of 2 is
better/mandatory/necessary/neatokeen doesn't help a great deal.

Art

-----Original Message-----
From: owner-amps@contesting.com [mailto:owner-amps@contesting.com]On
Behalf Of measures
Sent: Monday, October 02, 2000 9:06 PM
To: Cherry, Mark; AMPS
Subject: Re: [AMPS] SB200 Retrofit



>
>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
>value.
>
>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, www.vcnet.com/measures.
end


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