What's a good way to drive a PNP Ge with neg ground silicon?

[Earthscum]

Pretty much the subject. I'm just looking for some circuits to mess around with for driving, probably single, germanium PNP's into distortion. More like configurations, I guess... and suggested values.

The 4 transistors I'm going to be playing with are black can, marked "TH THP140 (sideways)S (sideways)Z"

tested:
(Gain), (leakage)
47, 23uA
47, 30uA
48, 31uA
72, 55uA

Last one is the oddball, but looking at the tonebender, I could take 2 of them, and the 72 gain, and that will leave me with one low gain, low leakage transistor to do something with.

I have all sorts of oddball Ge diodes, too if anyone has some kind of funky Ge circuit laying around to mess with.

One idea I had was making a gain stage => MPSA13 Darlington phase splitter =>Ge diodes (octave up) => Ge Transistor gain/distortion => (some kind of tone/blend circuit, filter of some sort). Would something like this be possible with the PNP at the end? or would there be stability issues?

ETA: Besides the Easy Face, and such circuits. I already have those on my list to try. But, one question... say I use a Si and Ge in a Fuzz Face, which position gets the Ge? I've seen them built in both spots, but makes sense to me to have it in Q1 because Q2 also has to work as a buffer, and it seems like Si would hold the bias more stable since it carries the gain, small changes at the buffered feedback are large variations of Q1's input. Q1 only has to amplify the signal, so can tolerate a larger amount of variance without disrupting the entire circuit. Correct, or even close?

[LucifersTrip]

Pretty much the subject. I'm just looking for some circuits to mess around with for driving, probably single, germanium PNP's into distortion. More like configurations, I guess... and suggested values

I have all sorts of oddball Ge diodes, too if anyone has some kind of funky Ge circuit laying around to mess with.

you can take a shot at the Jordon Bosstone and/or Heathkit Fuzz.
http://fuzzcentral.ssguitar.com/schematics/bosstoneschem.gif
http://www.muzique.com/schem/heathkit.gif

you'll definitely have to experiment with different resistor values to re-bias with a low gain ge in Q2...but at least you have 2 configurations that will work with npn/pnp

ETA: Besides the Easy Face, and such circuits. I already have those on my list to try. But, one question... say I use a Si and Ge in a Fuzz Face, which position gets the Ge?

sound is the most important to me and I think it sounds more like a ge FF with  ge as Q2

[Derringer]

I still like this idea
the "Sonic Tonic"
there's a schem in that thread that used a pnp germanium

http://www.diystompboxes.com/smfforum/index.php?topic=73226.0

[the3secondrule]

Harmonic Percolator?

[Earthscum]

Thanks. The Heathkit, I forgot about... the Bosstone I'll have to give a whack at.

The JB, however, uses Q2 simply as a buffer. I actually have an NPN Ge or 2 in my jar. I'm not too savvy on the whole leakage thing, i.e. I don't know what things need done to make effective a circuit to utilize the leakage, or whatever. (it's 7:15 am... hope that made sense). I know what the leakage is, I know how to measure it (thanks R.G.), I'm just not clear on what makes a circuit friendly for leakage.

That's why I'm playing around with these ones. I figure I'm ok with the low leakage, and then maybe I'll swap in some other ones I have that are about 300mA leaky and go play around from there. In the HK or Bosstone, for instance... how leaky of a transistor could I get away with in these circuits (Q2)? OR, are there conditions that need to be met to be able to just drop a Ge in place of a Si (besides obviously rebiasing)?

I have to go through my folder again... I have a bunch more little circuits like that from the 'net, just didn't think much about subbing Ge parts. I'm more of a Fet-savvy type, which  is getting me thinking about that Heathkit... gonna have to search on that, I know there was a thread here with transistor subs. I may have to try a jfet in Q1 there.

@Derringer Ooh yeah... it uses NPN, but... bookmarking that.

[Derringer]

@Derringer Ooh yeah... it uses NPN, but... bookmarking that.

he did both versions (pnp and npn)  

[Earthscum]

aah! I looked right over that one. Thanks... That's definitely getting a try. It's like a beefed up Fet Punch, using Ge instead of a fet.