[Drake] Need replacement cap for TR4C

[Glen Zook]

You are not going to be able to find a 60 mfd capacitor today.  Capacitors are now rated in the same tolerance steps as resistors.  Therefore, you will need a 68 mfd.  Mouser has a 68 mfd capacitor at 400 VDC part number 5985-85-400V68J for $3.15 in single quantities and 68 mfd at 450 VDC part number 5985-85-450V68 for $3.85 in single quantities.

Modern capacitors are considerably smaller in physical size than the "olde tyme" types.  Also, the tolerance on the newer capacitors is +/- 20% whereas the older ones typically had a tolerance of +80%/-50%.  Therefore, the new capacitors are going to be MUCH closer to the design values than the older types.

Mouser is at http://www.mouser.com and they do not have a minimum order for the United States, Canada, or Mexico.  Also, their toll free telephone number is (800) 346-6873.

By the way, I would replace the entire capacitor and not just the 60 mfd section.  The "modern" values would be 10 mfd and 22 mfd and they are available in 250 volt versions although I would replace them with a higher voltage rating.  The cost difference is just not that much.

Glen, K9STH

Website:  http://k9sth.com


--- On Mon, 6/16/08, Joe W2KJ <w2kj at bellsouth.net> wrote:

Just picked up a TR4C and find that I need a replacement for the multi-section electrolytic cap C145.
 
This is a Mallory can type cap rated at 250VDC with 3 sections...10/20/60 mfd.
 
Wonder if anyone has a NOS direct replacement for this cap available for sale or has a source for this cap??
 
Failing this, does anyone have a NOS single section cap at 60mfd/250VDC for  sale??