Having a problem with a tonepad pcboard for the scrambler. I discovered the backwards cap on the dry side ofthe blend pot, which is wired correctly. I chucked the original cap out and replaced it the other way around.
I have a scope and I can see signal on both the base and emitter of Q4, but not the collector. So I'm looking at that output circuit over and over. Also, I don't see any signal at the base of Q2, but its there downstream. Changed Q2 - same thing.
I used 2n5306 s for Q1,3,4. They are from small bear. These are unusual to me in that the flat face (sort of a TO92 case) has no writing on it. The writing is on the round part. So which are you facing when they says he 5306 is "ECB" ?
Anyway, I look at them from the flat. Update: Steve just told me the ones he sold me are ECB. You look at the flat, like always. OK.
I have no effect sound, just clean, responding to the blend pot. I've searched the scrambler help threads and they sounded promising but those solutions turn out to not be my problem.
I started with a BC169b in Q2 (ECB as you look at the face) and the voltages seem a little odd. Now I've put a 5089 in its place (right?) and it is EBC as you look at the flat face.
Voltages: ( "E 3.6." Means emitter 3.6v. Typing on the phone) 9.7v supply.
Q1:E 3.6. C 9.5. B 4.5
Q2 (5089): E .3. B .9. C 2.3. (BC169B): E .2. C 4.6. B .8
Q3: E 3.8. C 9.7 B 4.7
Q4: E. 3.8. C 9.5. B 4.8
Tonepad pc board. Tonepad schematic
http://www.tonepad.com/getFile.asp?id=31C3 is the cap that is wrong in the schem. I have the negative facing the output now.