S.E.X. 3.0 Kit: Right headphone driver is significantly quieter [resolved]
- Thread starter Jet
- Start date
If you reconnect that wire, what AC voltage do you see at terminal 11 vs. 25?
Well I soldered the wire back at terminal 10 of the output transformer and I began testing terminals 11 and 25, I wasn't get much voltage out of either one and when I was testing 25 something in the amp suddenly started to make a slight popping sound and then there was smoke so I unplugged everything and turned it off. This doesn't seem like a good sign.
You'll probably want to go back and do a DC voltage check to be sure all the DC voltages are still correct.
Now with signal playing through the amp I would check the AC voltages present at 11 and 25.
Is the lead of the cap attached to terminal 3 touching the bare shield wire under it? That will suck out all your signal.
What you need to be looking for is metal bits on components touching each other when those components don't go to the same terminal. This could also be leads poking through a terminal strip and touching things they aren't supposed to.
What you need to be looking for is metal bits on components touching each other when those components don't go to the same terminal. This could also be leads poking through a terminal strip and touching things they aren't supposed to.
It might help to see some more photos of the build on the A side of the circuit.
5L needs more heat and more solder.
9L had leads that should be trimmed off.
10L needs more heat so the solder flows out.
11L needs more heat so the solder flows out.
10L had leads that need to be trimmed back.
The STP wiring that goes to the 12 pin socket needs to be as close to the chassis plate as possible. I see one piece of it and it looks like the foil from the STP is touching the lead of the black Solen cap it's next to. Both of these wires are also installed over the 680 ohm resistor, which is incorrect.
9L had leads that should be trimmed off.
10L needs more heat so the solder flows out.
11L needs more heat so the solder flows out.
10L had leads that need to be trimmed back.
The STP wiring that goes to the 12 pin socket needs to be as close to the chassis plate as possible. I see one piece of it and it looks like the foil from the STP is touching the lead of the black Solen cap it's next to. Both of these wires are also installed over the 680 ohm resistor, which is incorrect.
Is there any change to the performance of the amp?
Are the DC voltages still correct?
This is likely to be a solder joint issue or a component touching something it shouldn't be. If you'd like to send it in for repair, you can contact Eileen at queen(at)bottlehead(dot)com regarding getting a repair box.
Otherwise reflowing all the solder joints on the A side of the amp, moving the Solen cap up a bit so the body of the cap isn't touching anything, and ensuring that all your component leads are trimmed should get your amp into working order.
Otherwise reflowing all the solder joints on the A side of the amp, moving the Solen cap up a bit so the body of the cap isn't touching anything, and ensuring that all your component leads are trimmed should get your amp into working order.
Similar threads
