In the early Gehring circuit V1B was a cathode follower similar to the 6G15 reverb unit. But the CF did not provide enough guitar signal to the vibrato modulator circuit so Tore T changed it to a gain circuit to provide a bigger signal to the modulator. The output of the modulator was then attenuated to get back to instrument signal level just before being mixed with the reverb signal.
The red components in the V1B circuit provide the necessary gain and the red components at the output of the modulator provide the necessary attenuation.
looking for a good trem/ verb unit schematic
Moderators: pompeiisneaks, Colossal
Re: looking for a good trem/ verb unit schematic
Thanks for the explanation sluckey, I hadn't really looked at the Tore T mods, didn't twig that they were on the same section that I was wondering about.
Re: looking for a good trem/ verb unit schematic
I think the idea hasn't popped up in this thread yet...
...but whenever you have a unit that incorporates both LFO-based amplitude modulation and a spring reverb it practically begs for "ghetto" echo effect implementation too: amplitude modulate that "wet" reverb signal instead.
...but whenever you have a unit that incorporates both LFO-based amplitude modulation and a spring reverb it practically begs for "ghetto" echo effect implementation too: amplitude modulate that "wet" reverb signal instead.
Re: looking for a good trem/ verb unit schematic
Background guitar is a 6G15 going into a 5G9teemuk wrote:I think the idea hasn't popped up in this thread yet...
...but whenever you have a unit that incorporates both LFO-based amplitude modulation and a spring reverb it practically begs for "ghetto" echo effect implementation too: amplitude modulate that "wet" reverb signal instead.
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He who dies with the most tubes... wins
Re: looking for a good trem/ verb unit schematic
That's pretty standard for Fender though isn't it, the reverb was always before the tremolo, so why not in the revibe?teemuk wrote:whenever you have a unit that incorporates both LFO-based amplitude modulation and a spring reverb it practically begs for "ghetto" echo effect implementation too: amplitude modulate that "wet" reverb signal instead.
Re: looking for a good trem/ verb unit schematic
Now that I've finally completed a layout in diylc for a 6G15 with the 6G12-A tremolo circuit added, it strikes me that by converting it to a reverb into tremolo setup I will be able to use the second half of the extra 12AX7.
Might not be able to fit it all onto the ReVibe board though.
Might not be able to fit it all onto the ReVibe board though.
Re: looking for a good trem/ verb unit schematic
Here's where I've gotten to, 6G15 into that Tore T gain stage, into a 6G12-A tremolo, in series like back in the day.
Any suggestions or improvements?
Any suggestions or improvements?
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Re: looking for a good trem/ verb unit schematic
RE, your schematic...Two Alpha wrote:Here's where I've gotten to, 6G15 into that Tore T gain stage, into a 6G12-A tremolo, in series like back in the day.
Any suggestions or improvements?
V4B needs a grid leak resistor.
Re: looking for a good trem/ verb unit schematic
Got it, many thanks sluckey.