What makes a " Good " germanium Diode ?

[HOTTUBES]

Is there a good , better , best when it comes to the classic 1N34A ?
What to look for when buying them ?







Thanks !

[mac]

Noise and leakage IMHO

RG suggested to use the leakage of a reverse Ge diode to feed the base of a Si transistor.
I experimented with one transistor as a booster and a large percentage of my Ge diodes were noisy.
As clippers they were ok...

mac

[midwayfair]

That it's not broken.

[duck_arse]

I look for "Ge diodes, 10 for 5$"

[HOTTUBES]

So .... even a cheap 1N34A can be good as a clipper ?

[armdnrdy]

Since we're on the subject of germanium diodes and 1N34As, does anyone know why some 1N34As have a red band

http://thumbs4.ebaystatic.com/d/l225/m/mWvFhr2YLI6199eeNcfQZ8w.jpg

or a green band

http://www.crystalreceiver.co.uk/img/10-005-560.jpg


rather than the "standard" black band?


http://www.reuk.co.uk/OtherImages/germaniumdiode.jpg

Different manufacturer maybe?

[Perrow]

I look for "Ge diodes, 10 for 5$"

Last time I bought 1N34As from Futurlec, I misread the price, I thought I bought 6 for $3, turns out I bought 60 for $3

[midwayfair]

Different manufacturer maybe?

Yes. There's no other difference.

FWIW, leakage 'can' matter as a clipping diode. But then, everything matters. Quality is not exactly an objective consideration ...

[LucifersTrip]

speaking of 1N34A's, since they're probably the most common modern germanium, I think you guys might get a kick outta what they originally looked like:





similarly, one of the other very common modern ge diodes, the 1N60, looked a helluva lot different back then

[bluebunny]

Mmmm...  Mooojoooo!