On Friday, January 4, 2002 at 6:17:47 PM UTC-5, dino wrote:

Hi guys, I'm trying to find a substitute for this diode : 1N34
I was unable to find it at digikey, jameco or radio shack

This is the data I found on it:

Name: 1N34
Type: signal
Material: germanium
PIV: 60 volts
Max current Forward(reverse) IO (ir) : 8.5 mA (15.0 uA)
Max drop Vf: 1.0 volts

I would appreciate help with finding a substitute. It's for NOPPP (no parts pic programmer).

-dino

Do a search on eBay for 1N34A or 1N34 should find what you're looking for but the substitutes will work also, 1N914 & 1N4148 as already mentioned. 73 de KE3FL/Phil

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eikavitch@gmail.com wrote:

On Friday, January 4, 2002 at 6:17:47 PM UTC-5, dino wrote:

Hi guys, I'm trying to find a substitute for this diode : 1N34
I was unable to find it at digikey, jameco or radio shack

This is the data I found on it:

Name: 1N34
Type: signal
Material: germanium
PIV: 60 volts
Max current Forward(reverse) IO (ir) : 8.5 mA (15.0 uA)
Max drop Vf: 1.0 volts

I would appreciate help with finding a substitute. It's for NOPPP (no parts >> pic programmer).

-dino

Do a search on eBay for 1N34A or 1N34 should find what you're looking
for but the substitutes will work also, 1N914 & 1N4148 as already
mentioned. 73 de KE3FL/Phil

Do you really think that after 18 years that the poster is still
waiting for an answer?

You replied to a post from "January 4, 2002".

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On Mon, 27 Jul 2020 22:35:17 -0000 (UTC), Rich <rich@example.invalid> sprachen:

Do you really think that after 18 years that the poster is still
waiting for an answer?

He'll be really grateful if he has been.

------------------------------------------------------------------------

if love is a drug, then, ideally, it's a healing, healthful drug... it's
kind of like prozac is supposed to work (without the sexual side
effects and long-term damage to the brain and psyche)

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On 23/04/2021 05:06, greenaum@gmail.com wrote:

On Mon, 27 Jul 2020 22:35:17 -0000 (UTC), Rich <rich@example.invalid> sprachen:

Do you really think that after 18 years that the poster is still
waiting for an answer?

He'll be really grateful if he has been.

------------------------------------------------------------------------

if love is a drug, then, ideally, it's a healing, healthful drug... it's
kind of like prozac is supposed to work (without the sexual side
effects and long-term damage to the brain and psyche)

Suggesting silicon diodes as substitutes for a germanium signal diode is
pretty daft too.

--
Brian Gregory (in England).

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On Sunday, August 29, 2021 at 10:07:35 PM UTC-4, Brian Gregory wrote:

Suggesting silicon diodes as substitutes for a germanium signal diode is pretty daft too.

Hot carrier or Zero bias diodes work well, and have better specs but they aren't cheap. They are made for microwave mixers and detectors

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Michael Terrell wrote:

On Sunday, August 29, 2021 at 10:07:35 PM UTC-4, Brian Gregory wrote:

Suggesting silicon diodes as substitutes for a germanium signal diode is
pretty daft too.

Hot carrier or Zero bias diodes work well, and have better specs but they aren't cheap. They are made for microwave mixers and detectors

With a bit of bodging, something like a BAT15-03 (<$1 in onesies, 21
cents in reels) ought to work at least as well as a 1N34A, assuming that
a 4V rating is enough, which it ought to be for an RF detector. (1N34As
work up to something ridiculous like 60V).

Cheers

Phil Hobbs

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On Friday, September 3, 2021 at 5:36:16 PM UTC-4, Phil Hobbs wrote:

Michael Terrell wrote:

On Sunday, August 29, 2021 at 10:07:35 PM UTC-4, Brian Gregory wrote:

Suggesting silicon diodes as substitutes for a germanium signal diode is >> pretty daft too.

Hot carrier or Zero bias diodes work well, and have better specs but they aren't cheap. They are made for microwave mixers and detectors

With a bit of bodging, something like a BAT15-03 (<$1 in onesies, 21
cents in reels) ought to work at least as well as a 1N34A, assuming that
a 4V rating is enough, which it ought to be for an RF detector. (1N34As
work up to something ridiculous like 60V).

I suppose the 1N271 is obsolete, as well? Microdyne had switched to them from earlier pat numbers in the late 1990s.

There are Ebay listings for 1N34 diodes. I had a pound of them, from Poly-Paks, but an animal dug a hole under the wall into my shed, and used them to make a nest. Needless to say, the several thousand diodes had their leads rusted away. I still have
some that were salvaged from some '70s era computer PC boards. They were daughter boards with individual flip flops, and they had silver mica capacitors. I can't imagine the price of something like that, back then.

Another trick is to DC bias a diode to give it closer to a zero volt forward drop. This was done in some radios in the early days to improve sensitivity. I had to scratch my head the first time I saw that trick, with a 6H6 dual diode vaccum tube.

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