UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Ge or Si transistors - any stability-difference if used in a VFO?

kalee20 · 14th Mar 2019, 3:53 pm

I tend to think Si will be more stable as the gain stages, and temperature effects will have less effect on them.

However, it is possible that a temperature drift caused by the tuned circuit may just happen to be compensated by an opposite drift in a Ge device. So AS A WHOLE the circuit may just happen to be more stable with Ge. Unlikely, but possible.

14th Mar 2019, 3:53 pm	#2
kalee20 Dekatron Join Date: Feb 2007 Location: Lynton, N. Devon, UK. Posts: 7,087	Re: Ge or Si transistors - any stability-difference if used in a VFO? I tend to think Si will be more stable as the gain stages, and temperature effects will have less effect on them. However, it is possible that a temperature drift caused by the tuned circuit may just happen to be compensated by an opposite drift in a Ge device. So AS A WHOLE the circuit may just happen to be more stable with Ge. Unlikely, but possible.