Substitution for germanium transistor

[MJC]

In article <3btjA.131757$MU7.29082@fx18.am4>,
Benderthe.evilrobot@virginmedia.com says...

oldschool@tubes.com> wrote in message
news:2gls8c9v6rniulp4et8n6ecvu5stq491ri@4ax.com...
I have not heard about germanium in years. When I played around with
old
tube stuff in the 60s - 70s, I remember germanium diodes were fairly
common. I never ran across a germanium transistor.

Reading this thread made me question what germanium really is, and I
read the following article (good article). I know it was used to make
the FIRST semiconductors, I never knew much more about it.
It appears it's a costly elemental material.

Back in the early 1960s I conducted an undergraduate/apprentice training
project to build a quartz clock. I think every transistor was germanium.

To divide the crystal frequency by multiple decades it used locked
multivibrators (no digital circuits whatsoever, though my employer made
computers). Anyone seen a circuit like this: https://onedrive.live.com/?
cid=72C9DE495D23AD02&id=72C9DE495D23AD02%215482&parId=72C9DE495D23AD02%
215481&o=OneUp ?

It was my very own design; I still have the circuit value calculations!

Mike.

 

Would have liked to see that but onedrive doesn't seem to like my computer. I am sure some sort of download will fix everything but they can stick that where it is sure not to get a sunburn.

 

[MJC]

In article <067ebd37-fe5a-475d-b034-62b5b9a1cb19@googlegroups.com>,
jurb6006@gmail.com says...

Would have liked to see that but onedrive doesn't seem to like my computer. I am sure some sort of download will fix everything but they can stick that where it is sure not to get a sunburn.

Thanks for that; I'm not good at "sharing"! It should just have been a
URL link. Please try this instead:
<https://goo.gl/photos/cZRDRY1JB3vTTr2F9>

Mike.