This is for you Webb. The capacitor in the photo was wired from the alternator output (A) to ground. I assume it was to filter noise. My meter say 6 nF. Does that sound right. What is the typical value and where is a good place to get a new one.
Yikes. $80 dollars is on the low side!
This is just a filter capacitor and the S-1915-1 part number comes up as installed as per an SB. Even if you leave it off, the charging system will still work. I'm not finding a spec on it, on line. Possible a spec may be ink stamped on a new one if you can get eyes on. I've seen various values on these filters but my opinion is that the 6 nf is a good reading. If you need to replace it with something cheaper, do a search for part number 63897-006.
I will clean it up and re-install it. If I have radio noise I will deal with it. My vhf is a Garmin 225. I think they have pretty good internal noise filtering.
Sorry Eddie, just got out of the plow truck and a little preoccupied. Just got 18" of snow and in the early am it is going to switch to 16 hours straight of freezing rain. I will try to get in the hangar tomorrow to look..
Eddie, I have an OE Cessna S1915-1 (one in the middle) that someone recrimped a connector on the wire and a few brand new replacements that are the same, made by same company, etc but different part number. 6.0 MFD rated at 150VDC and 100*C
$30US + postage from L9M2C1 if you want either...or anyone else for that matter, I have a few.