Hi,

Does anyone know of a GR incremental inductance bridge,
or a Megohm bridge for sale or trade? I do electronics engineering,
but so far not much with radio, and have not gotten a HAM license...
maybe soon though. Two kinds of projects want some "old but good"
test equipment -- developing organic semiconductor printable
diodes wants a megohm bridge, and designing power supplies related
to that wants an inductance bridge.

Thanks for any suggestions where to look. I've seen these
GR bridges go by on ebay recently, but the prices were
steep, and some high prices were for damaged/partial equipment...
John Griessen

On 21 Jan 2005 14:57:18 -0800, John Griessen wrote:

I've seen these
GR bridges go by on ebay recently, but the prices were
steep, and some high prices were for damaged/partial equipment...

The prices are steep because both of these are still quite useful and
there is demand for both. The 1633A, in particular, is a unique and
very useful instrument, but mainly of interest to designers of audio-
and power-supply-frequency transformers and inductors. I'm puzzled at
why you would need one to develop a power supply, though. The 1633A is
used to evaluate the characteristics of power supply transformers and
chokes with "real world" AC and DC operating levels, although it does
have some other uses. Were you planning to design and build your own
power supply components?

These are like any instruments on eBay - if they are in good
condition, and useful enough that there is significant demand for
them, they won't be cheap. You wouldn't expect a useable rubidium
frequency standard to close there for $2.00, would you?

Dale H. Cook, Chief Engineer, WWWR Roanoke VA, WCQV Moneta VA, WKBA
WZZI Vinton VA, WKPA WLNI WZZU Lynchburg VA, WMNA/WMNA-FM Gretna VA,
WOWZ Appomattox VA
http://members.cox.net/dalehcook/starcity.shtml