[R-390] On the subject of replacement capacitors...

[Barry]

 On Sat 02/04/11  9:09 AM , Tisha Hayes tisha.hayes at gmail.com sent:
> If you are replacing one of the caps on a capacitor bridge it needs to
> be"right on" the same value. Preferably one with very tight tolerances.
> 
> Since there are usually a few capacitors in the bridge configuration you
> mayeven want to consider changing all of them at the same time to new
> capacitors with the same rating. Ideally caps that were made in the
> samebatch.
> 
> Bridges are very finicky regarding the value of components. That is not
> anarea where "near enough" is "good enough".
> 
> -- 
> Ms. Tisha Hayes/ AA4HA

Hi Tisha,

This capacitor is part of a "detector" that feeds the meter.  There are some precision capacitors with very specific values in the detector, but most of the rest of them are plain-Jane components.

Components directly in the bridge circuit itself need to be accurate, yes, but I'm thinking this board doesn't require all of them to be precise.

While I'm trying to isolate the bad parts and see if I can get it working again (just for the mental exercises), I plan to replace all those little electrolytics.  That's why I was asking about using a more common, less expensive part.  One wouldn't matter, but half a dozen adds up.

Thanks,
Barry - N4BUQ