D'lite'ish scratch build - no sound - need a little help

[markmalin]

Hi guys,

I'm scratch building a chassis to the "teaked" D'Lite schematic that gets seen around here every so often. I traced the chassis vs the schematic, fired it up, tested voltages. Everything looks good so far. Plate voltages on the pre-amp tubes are in line (around 178 V on V1 and V2, 2xx V on V3), plate voltages for power tubes look fine (405 V). Bias is set in range (22 ma using 6V6's). I get no sound, though. Speaker cable is good (tried it on another D'Lite). I swapped in a good PI and good set of power tubes

I guess before I start debugging I thought I'd ask if anyone had a good procedure for where to start. Appreciate your input.

Cheers,
Mark.

[heisthl]

No sound as in not even an indication thats its on from putting your ear in the speaker?

[markmalin]

No sound as in not even an indication thats its on from putting your ear in the speaker?

I'll have to put my ear right up to the speaker, but I don't think anything's coming out. Which is to say, volumes on 10, guitar plugged in, speaker plugged in and dead silence.

[heisthl]

disconnect the output transformer from the speaker jack, ohm it, then use clipleads on a new jack - you have a short somewhere.

[markmalin]

disconnect the output transformer from the speaker jack, ohm it, then use clipleads on a new jack - you have a short somewhere.

Found it! I had the two output jacks wired incorrectly so it was basically grounding the output. Duh.

Thanks for the help.

I'll have to post pictures of this new chassis layout when I get the face and back plates. It came out really nice -- I realize it's not exactly like a Dumble in that I moved the input volume next to the other pots, rearranged the 3 switches slightly and widened the chassis a bit, but I think it looks good.

Thanks again,

Mark