Germanium diodes

L

lexderr

Guest
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
 
lexderr wrote:
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
Click to expand...
How about a 1N21E still in the military lead pack.
Make an offer,
mike

--
Return address is VALID.
Bunch of stuff For Sale and Wanted at the link below.
Toshiba & Compaq LiIon Batteries, Test Equipment
Yaesu FTV901R Transverter, 30pS pulser
Tektronix Concept Books, spot welding head...
http://www.geocities.com/SiliconValley/Monitor/4710/
 
"lexderr" <lexderr@seanet.com> wrote in message
news:l00db0lpjjp95n8j1v4d7vbgn41m2b8kil@4ax.com...
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
Click to expand...
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.

--
@@F@r@o@m@@O@r@a@n@g@e@@C@o@u@n@t@y@,@@C@a@l@,@@w@h@e@r@e@@
###Got a Question about ELECTRONICS? Check HERE First:###
http://users.pandora.be/educypedia/electronics/databank.htm
My email address is whitelisted. *All* email sent to it
goes directly to the trash unless you add NOSPAM in the
Subject: line with other stuff. alondra101 <at> hotmail.com
Don't be ripped off by the big book dealers. Go to the URL
that will give you a choice and save you money(up to half).
http://www.everybookstore.com You'll be glad you did!
Just when you thought you had all this figured out, the gov't
changed it: http://physics.nist.gov/cuu/Units/binary.html
@@t@h@e@@a@f@f@l@u@e@n@t@@m@e@e@t@@t@h@e@@E@f@f@l@u@e@n@t@@
 
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
 
My address is Charles Derr, 7711 Greenwood Ave N #202, Seattle, WA
98103. email is lexderr@seanet.com.
Thank you in advance.
Chuck


On 28 May 2004 16:25:20 GMT, dbowey@aol.com (Dbowey) wrote:

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
Click to expand...
 
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.

transistor@REMOVEkc.rrTHIS.com



On Fri, 28 May 2004 06:56:38 -0700, "Watson A.Name - \"Watt Sun, the
Dark Remover\"" <NOSPAM@dslextreme.com> wrote:

"lexderr" <lexderr@seanet.com> wrote in message
news:l00db0lpjjp95n8j1v4d7vbgn41m2b8kil@4ax.com...
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.

--
@@F@r@o@m@@O@r@a@n@g@e@@C@o@u@n@t@y@,@@C@a@l@,@@w@h@e@r@e@@
###Got a Question about ELECTRONICS? Check HERE First:###
http://users.pandora.be/educypedia/electronics/databank.htm
My email address is whitelisted. *All* email sent to it
goes directly to the trash unless you add NOSPAM in the
Subject: line with other stuff. alondra101 <at> hotmail.com
Don't be ripped off by the big book dealers. Go to the URL
that will give you a choice and save you money(up to half).
http://www.everybookstore.com You'll be glad you did!
Just when you thought you had all this figured out, the gov't
changed it: http://physics.nist.gov/cuu/Units/binary.html
@@t@h@e@@a@f@f@l@u@e@n@t@@m@e@e@t@@t@h@e@@E@f@f@l@u@e@n@t@@
Click to expand...
 
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
 
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
 
You must log in or register to reply here.

Welcome to EDABoard.com

Sponsor

Back
Top