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Vintage threads from the first ten years
This Reverb will break your balls, mate!
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 6/1/1999 4:32 AM |
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MArkus Torvinen |
This Reverb will break your balls, mate! I am custom guitar amp luthier here in Finland. I have designed many amps and valve stuff used by many rock musicians and studios in Finland. I have done lots of research about reverb jangle heaven and good fx-loop. This is best i have ever made: reverb and fx-loop is parallel to each other and this combination is parallel connected to phase splitter valve. So, i drive reverb tank with two EF 86 and amplify reverb janglebangle with metal-shell 6SJ7 which drives reverb/fx-loopīs phase splitter tube. Hey! In the amp is really two phase splitter valves, one for dry audio and one for reverb and fx loop. Why this? Problem always with low wattage 20-30 watt amps have been -when you crank it up and play with power amp distortion, you will distort the reverb also. Try this, you will amazed! Do not email me, no email available... Markus Torvinen, Finland Ps. This schematic have also EF 86īs as a phase splitter for dry audio. Amazing dynamics and distortion harmonics... |
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| 6/1/1999 2:33 PM |
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| Doc |
Markus: Good to hear from you. The reverb scheme sounds interesting. Are you running all the tubes(EF86/EF86/6SJ7) as pentodes, or are any of them triode-connected (screen tied to plate)? Are the two EF86s run in cascade (as gain stages), then R-C coupled to a high impedance reverb tank, like an Ampeg, or is one EF86 acting like a tiny power amp (like old fender stand-alone reverb unit) driving a fender reverb transformer & tank? Do you combine the returns of the two parallel paths (dry amp signal and reverb/effects signal) at the phase splitter using a long tail pair and one signal to each triode grid? Sorry for all the questions, but since it works so well, I'd really like to have a good understanding of the circuit you've developed. Thanks, Doc |
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| 6/3/1999 7:02 AM |
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| Markus Torvinen |
Hi Doc! I will send schematic to you, if you could give your home address. I canīt make any computer drawnings because i am in the army now and my time with computer is only one hour per week. This is quite unique schematic and power amp is also veryveryvery unique. O.T. have only one winding and there is no D.C present in the O.T. Very strange... It is sort of push-pull but nothing like that and it is not a serial or parallel connected power valves(2 EL84īs). So i think you want to see this schem. Take care, Markus torvinenmm@hotmail.com |
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| 6/3/1999 9:49 AM |
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| Carlo |
Doc, Perhaps, when the schematic arrives, if it's ok with Markus, you could post it so we can all take a look. Thanks, Carlo |
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