matt h wrote:Jazbo, I wasn't completely clear and you misread me-- as shown, it is with a very cold bias (pause), I can't imagine it sounding good if moved into a secondary position (maintaining the values as shown)--which was what he'd suggested wasn't as pleasing.
I'm just now coming off a tri/pent/cf/ts preamp project. There's a tremendous amount of flexibility this setup has if you tune things, rather than copy/paste sections of components into another project and expect it to work optimally.
I see now I fully agree, some tuning are most likely needed when cut-and-paste circuit elements into different projects. I'm not sure which project 10thTx was referring to, perhaps he will clarify.
I would presume the amp idea would need tweaking and I think the schematic would be a reasonable starting place.
For comparison, look at the HoSo56 that Geezer (Hoffman forum) built. I did versions of the HoSo56 with EL84, 6BM8, 6V6, 6AQ5 and 5881 and liked all of them. One of the most touch sensitive amps I've ever played.
Regarding the FX, I am currently using this idea on my D'Mars ODS & love it. I initially, had a full D'Lator type FX on board and realized that I did not need a triode for the send stage since the cathode follower worked as a buffer itself (as I understand it).
Compare the T-Rocket 5879 & 5881 to the schematics attached. All of these schematics are proven designs and not just a DRAFT.
with respect, 10thtx
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WRT to the 5879 in V1, since the values are taken from proven designs so should work well as they are... I believe Matt was asking if you tweaked the values for the 5879 when you move the stage before/after the 12A_7 stage. If not, I am sure Matt will correct me...
I believe Matt was asking if you tweaked the values for the 5879 when you move the stage before/after the 12A_7 stage.
OK, sorry I didn't understand the question at first. (IIRC) Yes, I tweaked the cathode resistor and cathode cap values. That was it. Regarding the coupling cap off the plate, I've used .0047 - .01 range.
I fully agree, some tuning are most likely needed when cut-and-paste circuit elements into different projects. I'm not sure which project 10thTx was referring to, perhaps he will clarify.
Isn't it a T-Rocket instead of a "Trainwreck Rocket"?