Retrograde low / no volume can I get a second set of eyes?

[jimilee]

So I built up the rtro grade. no / low volume UNLESS I hold the toggle switch and touch the volume pot with my other hand or the out put wire. I have reflowed about 17 times. Replaced the volume pot,the electros, everythign is oriented corretly,no solder bridges.I did an audio trace,and audio is loud up to D3, that's where it's quiet. . These readings ate with the battery reading at about 7.5 Volts Help,what's next?
Q-1 2n5087
E-3.5
b-2.4
c-2.4
Q-2 2n4401
e1.9
b-0
c-7.6

q-3  2n4401
e-1.3
b-1.9
c-4.1

[jimilee]

Bump

[DutchMF]

Don't want to state the obvious, but did you check your resistor values? Had a little problem in that area myself lately..... Also, try it with a fresh battery/power supply, and check your ground connection (for the whole hand/volume pot thing)

Paul

[jimilee]

Don't want to state the obvious, but did you check your resistor values? Had a little problem in that area myself lately..... Also, try it with a fresh battery/power supply, and check your ground connection (for the whole hand/volume pot thing)

Paul

I did, resistors and caps and trannies.

[jimilee]

So would the diode cause this?

[jimilee]

Anybody???

[nzCdog]

Well you have a problem.  Firstly a 7.5 Volt battery will have high internal resistance and cause you problems. Get a fresh 9V battery.

The collector of Q1 should also be the same bias at the base of Q2, but Q2 is 0V.  This indicates a bad connection or short to ground somewhere between them, or a faulty transistor.  

[jimilee]

Well you have a problem.  Firstly a 7.5 Volt battery will have high internal resistance and cause you problems. Get a fresh 9V battery.

The collector of Q1 should also be the same bias at the base of Q2, but Q2 is 0V.  This indicates a bad connection or short to ground somewhere between them, or a faulty transistor.  

Oh thank you thank you thank you. I will go there next. I have reflowed again tonight and replaced a 10n Cap with a 100n cap.

[John S]

I'm having the same problem. Very low volume and little fuzz. What is the fix?

[jimilee]

I'm having the same problem. Very low volume and little fuzz. What is the fix?

i sold it to someone else to t.s.

[jimilee]

However, the guy that bought it reflowed all the joints again and replaced the diodes. i think the diodes were the biggest problem. Got them from Tayda and I think they were shoddy.