SB-401 Balance modulator diode replacements

[Michael Waldrop]

Good afternoon everyone,
   
  I have an SB-401 that has 2 blown diodes in the balance modulator. The original diodes are
  color coded Brown/White/Brown which cross references to a 1N191 crystal germanium
  diode I believe. I have what appears to be some 1N210 crystal diodes. They have clear
  glass bodies, color bands are "Red/Brown/Black". Cross references that color code 
  shows them to be 1N210's. Unfortunately, if the color code is correct, a 1N210 doesn't have
  the PIV and current rating the original Heathkit diodes has; original diodes 90VDC PIV
  at 500 mils where as the 1N210 has a 45VDC PIV at 27mil current rating. Even if the 
  210's would work I believe the internal resistance would be too high to work in a 
  balance modulator.
   
  Has anyone ever changed the diodes in the SB-401 and what component number did
  you use? I'd like to get this fixed but I don't want to install the diodes I have and have
  them fail.
   
  Any suggestions on diode replacements for the balance modulator in the SB-401? Thank
  you for any help/references/part numbers you can provide.
   
  73's
  Mike
  W5RKL
   

 __________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com 

-----------------------------------------------------------
Products bought, sold or traded here is the responsibility of the
parties involved.  This list and the City of Tempe are not responsible
for losses or misrepresentations of any kind.  Buyer beware!

-----------------------------------------------------------
This list is a public service of the City of Tempe, Arizona
-----------------------------------------------------------

Subscription control - http://www.tempe.gov/lists/control.asp?list=HEATH
To post - HEATH at LISTSERV.TEMPE.GOV
Archives - http://listserv.tempe.gov/archives/HEATH.html