[Milsurplus] Replacing/rebuilding old stud-mount caps

[Barry Hauser]

Hi George & list

I forgot to mention -- the only place where I saw the new manufacture
equivalent is in the form of motor start capacitors as you've mentioned, and
I might try those, but unfortunately, they most all have a larger
footprint -- usually oval -- shorter and squatter -- but probably the
electrical equivalent.

If you check out the Scott RCH manual on the bama site -- it's only 1MB
dejaview file, Fig 2.13 on page 5 shows a top view -- the 4 cans in a row on
the left.  They'r about 6 inches high, I'd say 1.5 in. diameter.  The
schematic shows them with no polarity -- unfortunately that one's blurry.

The bama site also has the manual for the Scott RBO-2 which similar but the
photos and schematic are much clearer.  (File is bigger, also dejavue)
Equivalent photo, also Fig 2.13 is on page 3.  The caps are C-101, 102, 103
and 104.  On the parts list, they're described as output and input filters,
"Capacitor, paper, 4mfd, 600 volts, working" -- not electrolytic.

The can is not connected to either side of the cap.  Either there are two
solder tabs on the insulated center of the stud, or two wires coming out
through it.

Where have you seen the 4 mfd film caps?  Do they go up as high as 600
volts?  As I mentioned, tops I've seen are 2 mfd 630 volt -- I think.

Barry


George wrote:
I'm not sure I have a mental picture of exactly what you are describing.  In
any event, I have seen up to 4 MFd film capacitors, and some high end motor
shops still have new low value oil filled capacitors.  Finally, there was a
thread (with a lot of misinformation and hysteria) on another reflector
about the possibility of those old oil filled caps containing PCBs.  So,
don't drink the drippings, and wash up after handling them.

HTH,
73,
George
W5VPQ


___________________________________________________________________
Try Juno Platinum for Free! Then, only $9.95/month!
Unlimited Internet Access with 1GB of Email Storage.
Visit http://www.juno.com/value to sign up today!

______________________________________________________________
Milsurplus mailing list
Home: http://mailman.qth.net/mailman/listinfo/milsurplus
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Milsurplus at mailman.qth.net