Green Ringer troublebugs

Started by petemoore, April 14, 2014, 11:56:48 PM

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petemoore

 Green ringer #1 was npn, worked, but I tried converting it to pnp and then built another PNP version.
GGG Schematic but with all polarized components reverse polarized.
I ran out of Si NpN's when searching an old Teac preamp found a dozen 2SB type germaniums [yepp].
The plan is a PNP Fuzz/Octave box, I've got the FF sounding great.
I can't seem to put resistance from Q1 base to the power rail [-]. I now have 220k + 100K + 220K but read 112k across the three resistor chain [couldn't find a 560k]. It's like there's a parallel path across another resistor, but I can't seem to find one on the schematic or this second board I build which doesn't have a cramped layout, it looks like I can see everything and remeasured, redebugged etc.
It looks like Q1 collector biases Q2 base...Q3 seems to be working fine.
Q1
E .95
B .98
C 6.28
Q2
Will be easier to debug if needed when Q1 is figured out
Q3 works.
The same parallel R situation [Q1 base to power rail] is what caused me to build a roomy layout on a new board...it's baffling me !
The transistor pinout is the same as the NPN version except I've got PHP in Q1 and Q3 posistions [emitters toward ground] and an [upside down] BC109 [emitter toward power rail] in Q2 socket.
Any ideas appreciated !
Convention creates following, following creates convention.

R.G.

I didn't go relate what you said to the schematic, but remember that germanium leaks 1000 times as much as silicon, and that germanium junctions conduct at voltages that meter resistance sections easily supply. The parallel resistance could easily be the germanium junctions.
R.G.

In response to the questions in the forum - PCB Layout for Musical Effects is available from The Book Patch. Search "PCB Layout" and it ought to appear.