[Milsurplus] Vibrators

[Bill Buoy]

An Australian website offers advice on repairing a failed unit:
http://203.44.53.131/Vibrator/Vibrator.htm

And here is a possible mechanical and solid-state replacement source:
http://www.tubesandmore.com/ - both 6 and 12 volt positive and negative
ground 4-pin solid state replacements.

As well as a basic discussion of how vibrator supplies work:
http://www.gbronline.com/radioguy/vpwrsup.htm

I recall from the late 50's - early 60's that it was not uncommon to try to
repair failed vibrators before replacing them. Careful surgery and patience
would get the cover off the vibrator in good enough shape to be able to
reassemble it. The most common failure was brought about by a bad buffer
capacitor. Replacing it, and dressing the contacts with a relay contact
burnishing tool (not a file!) frequently extended the life of the failed
unit.

Regards,

Bill Buoy
Web page http://www.geocities.com/buoy@sbcglobal.net/home.html
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Which reminds me, is there a noninvasive way of "solid stating"
the GRR-5 receiver power supply and still have it work on the
stock range of voltages?? I love to hear the vibrators hum, but
some day they might refuse to do so.

Tom NU4G

>
>
>My empirical experience indicates something on the order of half a century
of
>no use before the contacts don't (make contact).<snip>