[Milsurplus] GRR-5 Parts needed

[WA5CAB at cs.com]

Oops.  Then you have a problem.  The 6-pin vibrator in the PP-308 is 
moderately available.  The 4-pin has for the past several years been unobtanium.  

In case anyone has any and don't know it, here are the numbers I know of that 
may be on the vibrator:

3H6691-15 (SIG STK NR)
6130-235-1000 (FSN)
6556 (Oak)
V-6556 (Oak)
VB-1001 (Oak)
C-3020 (Jameson)
190G3001 (Oak)

There may be others.

Lacking that, AA1P wrote an article for ER some years ago on the AN/GRC-9 in 
which he shows a simple bi-polar transistor replacement for the vibrator in 
the DY-105.  I have a copy of the pages scanned but none of them identify the 
month or year (or ER for that matter).  The basic approach should work in the 
PP-308 (the 1N4005's are already present in the PP-308, in the form of selenium 
diodes, which I recommend you replace with silicon's in any case - they are 
probably bad by now).  Component values (two resistors and a capacitor) may need 
adjusting in order to get it to run at around 100-115 CPS.

In a message dated 7/21/2006 10:53:43 PM Central Daylight Time, 
digitalham at gmail.com writes: 
> My problem is that I am MISSING the whole thing. Nothing to repair :-(

Robert Downs - Houston
<http://www.wa5cab.com> (Web Store)
MVPA 9480
<wa5cab at cs.com> (Primary email)
<wa5cab at houston.rr.com> (Backup email)