Ritchie TMB Head Build - Need Help!!

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jersey_aaron
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Ritchie TMB Head Build - Need Help!!

Post by jersey_aaron »

Hey folks, new builder here, and I don't know jack about electronics. I'm trying to build the Ritchie TMB circuit for a head. I got the trannys and chassis from graydon, and Nik made me the board. Unfortunately, the Ritchie layout does not include the entire circuit, so I had to fill in the blanks with other layouts. Anyway, I've uploaded *my* modified layout of Ritchies drawing to the TROUBLESHOOTING GALLERY, so maybe one of you can tell me if it looks right.

A few observations:

1. The Ritchie TMB schematic has tubes V2 & V3 backwards according to the the Ritchie TMB layout.
2. The Ritchie TMB schematic lists an extra 16uf filter stage, but the Ritchie TMB layout does not (I've added it in blue - is this the right way?)
3. The Ritchie TMB shematic lists the Red wire from the OT connected to the capcan AFTER the 1.5k 2w resistor on the capcan, the original shematic lists it connected BEFORE the 1.5k 2w resistor on the capan. Which is correct ?!?!

Other than that, please let me if you see anything that is obviously wrong, or if my observations are totally incorrect!
Much appreciated,
Jersey Aaron
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Plexi
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Post by Plexi »

Aaron: Glad you spotted that, the OT hooks just like it does in the regular 18.. I think you put PT instead of OT on your drawing.. And the filter stage was added after the before the preamp. And that about it.
Mark did the schematic drawing, i'm sure he asked me if i seen anything wrong, but i must of missed it.its been a while since that was done.

Richie
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