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previous: Scott Swartz Quoting from this link:... -- 8/30/2000 9:53 PM

Re: Harmonic Tremolo in a pedal?

8/31/2000 1:27 PM
jon	Re: Harmonic Tremolo in a pedal? Hi guys, I may be sticking my neck out here, but from my read, the "brown era" tremelo doesn't really mess with the bias/power amp. It's simply a dual triode configured as an oscillator into a cathode follower buffer, so as not to load down the next triode stage which is a "symmetric modulator," or phase splitter. This stage feeds a dual triode frequency divider/mixer stage. Overall, the circuit requires 2.5 12AX7's. This is easily built as a pedal, (mine has a pretty big footprint.) I actually put this together to A/B sound test some of my other oscillator-based circuits by, kinda as a "gold standard". Also, consider putting in a wet/dry mixer beforehand to give depth of effect. If you put in a feedback loop between the wet/dry paths, you can also get some cool stuff happening. I've been thinking about doing this up as a SS unit, by modifying Kevin O Conner's wide range tremelo circuit as outlined in his Tonnes of Tone. He also has an excellent explanation and includes some component value mods on pg 6-42 of The Ultimate Tone, Vol. 2. Cya, Jon

8/31/2000 1:27 PM

jon

Re: Harmonic Tremolo in a pedal?

Hi guys,
I may be sticking my neck out here, but from my read, the "brown era" tremelo doesn't really mess with the bias/power amp. It's simply a dual triode configured as an oscillator into a cathode follower buffer, so as not to load down the next triode stage which is a "symmetric modulator," or phase splitter. This stage feeds a dual triode frequency divider/mixer stage. Overall, the circuit requires 2.5 12AX7's.

This is easily built as a pedal, (mine has a pretty big footprint.) I actually put this together to A/B sound test some of my other oscillator-based circuits by, kinda as a "gold standard".

Also, consider putting in a wet/dry mixer beforehand to give depth of effect. If you put in a feedback loop between the wet/dry paths, you can also get some cool stuff happening.

I've been thinking about doing this up as a SS unit, by modifying Kevin O Conner's wide range tremelo circuit as outlined in his Tonnes of Tone. He also has an excellent explanation and includes some component value mods on pg 6-42 of The Ultimate Tone, Vol. 2.
Cya,
Jon

Replies:

Matthew Springer After looking at the spec again of ... -- 9/1/2000 3:44 PM
Fopoman How did you power the "brown era" p... -- 9/10/2000 9:35 AM