Re: R7 parent board pin out
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Thanks....? I missed your answer about board compatibility. Sorry, I don't mean to be a pest.
Thanks for all your help.
73, Dan (W3DF)
One again, yes. The two boards are interchangeable. However as I have already stated you will want to change all the small electrolytics from the output of the TDA2002 to the output of the rectifier/voltage multiplier. See attached photo of mine. That is not a gray cap in the front left. It was the same color as the others before it saw several years of continuous service. While you are at it you might want to put a 10uF from pin 1 of the LM317 to ground. It is recommended on the data sheets to improve ripple rejection and I have learned over the years that it is wise to follow such recommendations.
You may want to consider running the R7 from external DC. It will take a lot of heat out of the box.
On Mon, 28 Apr 2025 23:38:24 -0400
"Daniel W3DF via " <danflan49=[email protected]> wrote:
> And a newer version power supply board.? My R7 has the older one.? Will the
> new one work in an older R7?
> I don't want to destroy anything by trying to use this newer PS board.
--
73
-Jim
NU0C
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