Tag it! Works fine, although having trimmers for the transistors would be useful. I socketed those resistors, but only needed to change one to get the voltages similar to the schematic. Sounds great though!
@fuzzhead Please make a layout for the old TC Electronic Booster + Line Driver & Distortion. Based on a quad op amp (HA4741, LM148, NJM2058...) and a baxandall tonestack. The switching should be simplied - omit the 4007... Schematic and manual are in this thread:
I made this using some spare P416B's that I had lying around. It took some pretty extensive messing around to get the bias close to that in the schematic. The stock values sounded pretty thin with my transistors. All of the action on the gain pot was in the last few degrees so I swapped it for a C10K which is much more useable and it now sounds beautiful. I wonder if there was a typo in the original schematic? A B5K would have adequately covered the useful part of the gain range on my build.
This is a pretty excellent little overdrive. Highly recommend!
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ReplyDeleteMaybe trim pots as emitter resistors would be useful?
ReplyDeleteAre there any measurements of hfe and leakage?
Tag it! Works fine, although having trimmers for the transistors would be useful. I socketed those resistors, but only needed to change one to get the voltages similar to the schematic. Sounds great though!
ReplyDeleteAlso found it quite nice putting the diodes on a switch to take them out of the circuit. Just adds a slightly different flavour
Delete@fuzzhead Please make a layout for the old TC Electronic Booster + Line Driver & Distortion. Based on a quad op amp (HA4741, LM148, NJM2058...) and a baxandall tonestack. The switching should be simplied - omit the 4007... Schematic and manual are in this thread:
ReplyDeletehttps://forum.pedalpcb.com/threads/tc-electronic-booster-line-driver-distortion-bld.3947/
I made this using some spare P416B's that I had lying around. It took some pretty extensive messing around to get the bias close to that in the schematic. The stock values sounded pretty thin with my transistors.
ReplyDeleteAll of the action on the gain pot was in the last few degrees so I swapped it for a C10K which is much more useable and it now sounds beautiful.
I wonder if there was a typo in the original schematic? A B5K would have adequately covered the useful part of the gain range on my build.