Ge transistor temp compensation with a single diode

[MBFX]

I found an interesting discussion on Stackexchange:

https://electronics.stackexchange.c...would-you-attach-a-diode-to-the-base-of-a-bjt

Has anyone tried this? Seems like you can simply add a Ge diode with comparable leakage to ground at your Ge transistor's base, and have simple temperature compensation. I'd like to test this, but collecting data will be a problem given the rudimentary instrumentation I have at home.

 

[Locrian99]

I found an interesting discussion on Stackexchange:

https://electronics.stackexchange.c...would-you-attach-a-diode-to-the-base-of-a-bjt

Has anyone tried this? Seems like you can simply add a Ge diode with comparable leakage to ground at your Ge transistor's base, and have simple temperature compensation. I'd like to test this, but collecting data will be a problem given the rudimentary instrumentation I have at home.

I suppose there is not matching leakage but isn’t that kind of what is happening with q3 on a mkiii

 

[MBFX]

Yeah, kinda!

 

[Feral Feline]

There's a whole thread on here about making Ge adaptable with Temperature Compensation, IIRC it's somewhere in the Boneyard...

Other forums have some similar discussions. It's a cool idea and would solve one of the biggest issues with using Ge transistors.

 

[jwin615]

I just build all my mkiis in easy bake ovens. Really warm toan
For real. This is very interesting if it truley helps stabilize them

 

[MBFX]

I'll have to cop that technique

 

[Feral Feline]

So that’s how Darkglass (and other companies) get that baked-in tone!

Easy-bake!