ge tran stabilization

[m_charles]

Hi. Ordered some trannies to make a fuzz face. Have another FF with bells and whistles, pre-gain, low-cut, different in and out caps. Wanted to build a FF with no mods, bone stock, with the exception of a trim on Q2's collector.
Anyways, have a weird thing.
We all know ge's can do weird things with temp, etc. Well my new FF sounds good, but while setting the trim I noticed a weird thing. Once I set the -v at 4.5-5v @ Q2 collector the trannie takes a good 15 min to "settle". It will start around 3.5v to 4v, but after 15 min or so it will settle in around 5v. I would write this off as typical ge trannie drift, but my other FF doesn't have this issue. it will drift a bit, but will stop its drifting after 5 min max.
Its not a leakage issue, the leakage is quite low (.09/1.11=101 hfe using rg's method), double and triple checked (socketed the trannies), and the pedal sounds really good, it just has me puzzled.
any thoughts?
chuck

Also, would a stabilizing ge diode from b-c like in the 3-Knob ToneBender help? why is this not done on a FF?

[mac]

I trashed a few germs that took a lot of time to reach a steady state or drifted forever while testing gain and leakage.

The reverse diode trick never worked for me. Never used a transistor of the same kind wired as a diode, but I doubt it can make any difference.
In a TB 3k heat has a bigger impact on the transistor than on the diode so voltage will drift a lot. At least this is what I noted by finger heating the diode and the Ge.

mac