I built the Duocast and got nothing from the output jack. After checking everything I can think of it seems to be functioning perfectly -- up until the transformer. Using an audio probe with Gain, Level 1 and Level 2 turned about halfway up I get output all the way up to the transformer primary, and it responds to the low cut and gain pots as expected. The voltage switch has the correct effect, LEDs light up, the high gain switch bumps up the signal as expected.
Not sure it matters but my germanium is Matsushita 2SB171 (hfe 60).
I get audio from pins 1, 2 and 5 of the transformer, but nothing from 6. The dot on the transformer is aligned to the PCB (lower left) and I've reflowed all solder joints. I have continuity between transformer 6 to pin 3 of both Level pots, and from Levels pin 2 to the output jack. There's just no audio going from pin 6 to the Level pots.
I've built a lot of pedals and can usually troubleshoot them, but I'm an EE noob and don't really understand transformers. But I can't find anything wrong except the transformer. Any ideas?
Not sure it matters but my germanium is Matsushita 2SB171 (hfe 60).
I get audio from pins 1, 2 and 5 of the transformer, but nothing from 6. The dot on the transformer is aligned to the PCB (lower left) and I've reflowed all solder joints. I have continuity between transformer 6 to pin 3 of both Level pots, and from Levels pin 2 to the output jack. There's just no audio going from pin 6 to the Level pots.
I've built a lot of pedals and can usually troubleshoot them, but I'm an EE noob and don't really understand transformers. But I can't find anything wrong except the transformer. Any ideas?
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