[time-nuts] Low 1/f transistors for oscillator

[glen english LIST]

Hi

I am embarking on building up a block - a common collector Butler 
oscillator with an overtone  crystal at 98.304 MHz

on on FR4 , I've used the Philips NPN type  BFS17.

The results <=10 Hz phase noise were quite disappointing. (-69 @ 98 MHz)

Does anyone have any good suggestions. Maybe something slower (larger) 
like a 2N5179 (or its SMT counterpart MMBT5179) will be better.

regards

glen

On 13/12/2022 11:14 am, Lux, Jim via time-nuts wrote:
> On 12/12/22 2:43 PM, Alex Pumm