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Germanium diodes

L

lexderr

Jan 1, 1970
0
I have been reading a book called "Bench Test Circuits for
Surveillance and Countersurveillance Technicians" by Tom Larsen and
have been trying to locate "wide-band-width 5GHz range Germanium diode
with a lover than normal forward voltage to use in a bug dectector
listed in his book. Anyone got any ideas?
Thanks
 
M

mike

Jan 1, 1970
0
lexderr said:
I have been reading a book called "Bench Test Circuits for
Surveillance and Countersurveillance Technicians" by Tom Larsen and
have been trying to locate "wide-band-width 5GHz range Germanium diode
with a lover than normal forward voltage to use in a bug dectector
listed in his book. Anyone got any ideas?
Thanks

How about a 1N21E still in the military lead pack.
Make an offer,
mike

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W

Watson A.Name - \Watt Sun, the Dark Remover\

Jan 1, 1970
0
lexderr said:
I have been reading a book called "Bench Test Circuits for
Surveillance and Countersurveillance Technicians" by Tom Larsen and
have been trying to locate "wide-band-width 5GHz range Germanium diode
with a lover than normal forward voltage to use in a bug dectector
listed in his book. Anyone got any ideas?
Thanks

1N5711 Schottky signal diodes are used for VHF and UHF work and are
available on Ebay for fairly cheap. But any old 1N60 or other low
capacitance video detector should work somewhat. The leads on the
diode can act as a dipole antenna and pick up wavelengths that are up in
the GHz range.

ALso you might consider a microwave oven leakage detector. They're not
as sensitive, but then you could put additional circuitry into one to
boost the sensitivity. Also radar detectors for the car.

If you're serious about that stuff, then you should check out some of
the websites that offer that kind of equipment. They want some serious
money for this stuff.

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D

Dbowey

Jan 1, 1970
0
I have a bunch of hot carrier diodes left over from an old 2 GHz project. They
may work at 6.

If the OP will email me I will mail a couple for free.

Don
 
D

Dbowey

Jan 1, 1970
0
Chuck,

They will go in Tuesday mail from Washougal.

Don
 
I have a bunch of vintage Germanium Diodes. A lot of them are the
ceramic cartridge type with two gold ends made for detectors. Lots of
these are packed in little lead tubes. Some are eeeny meeeeny little
things packed in lead envelopes. (BTW why are they packed this way?)
If the book suggests a part number, please post it or email me. Would
be glad to send you one N/C if I have it.

[email protected]
 
D

Dbowey

Jan 1, 1970
0
re:

<< I have a bunch of vintage Germanium Diodes. A lot of them are the
ceramic cartridge type with two gold ends made for detectors. Lots of
these are packed in little lead tubes. Some are eeeny meeeeny little
things packed in lead envelopes. (BTW why are they packed this way?)
If the book suggests a part number, please post it or email me. Would
be glad to send you one N/C if I have it.
They are packed that way for static protection. A couple part numbers for this
style is 1N21 and 1N23, with or without a suffix. They were common in
microwave, and some UHF, receivers.

Don
 
J

Joe McElvenney

Jan 1, 1970
0
Hi,

I always understood that the metal capsules were meant as a
micro-wavelength radiation screen. Diodes such as these are often
used as mixers (although they were silicon in my day) and so
could find themselves stored close to a high power source. As the
semiconductor package might be a sizable fraction of the
wavelength used, a largish voltage could be developed across them
with dire results.


Cheers - Joe
 
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