Fender amp with reverb, and no vibrato...

[PrecisionB]

First of all, why didn't Fender make one back in the day? Almost everyone uses verb, and I hardly see anybody use the vibrato.

Anyhow, I am planing to build an amp soon. I want it to be a clone of a deluxe reverb, but without the vibrato. (to be able to make it more compact, and use less parts)

I could figure this curcuit out myself, but I feel it has most likely been done before. No sense in re-inventing the wheel. Anybody know of where to get a schematic for this, or similar? (6L6, 6V6, etc.)

[martin manning]

Nothing to figure out, really; just snip out the term circuit. One lead to the intensity pot from the junction of 0.1u and 220k, one from the bias pot, and of course the connection to the power supply node B.

[10thTx]

http://home.comcast.net/~seluckey/amps/tdr/tdr.htm

Sluckey on Hoffman forum did a Deluxe Reverb without vibrato in a tweed chassis & cabinet. There is a layout on his website.

Sluckey's schematic and layout here:
http://home.comcast.net/~seluckey/amps/tdr/tdr.pdf

Here is another schematic. CHECK for errors & compare with Sluckeys!

With respect, 10thtx

[wyatt]

First of all, why didn't Fender make one back in the day? Almost everyone uses verb, and I hardly see anybody use the vibrato.

While I agree with the latter, which is why vibrato is rare in most non-reissue amps...I think you'd be surprised just how rare in-amp reverb is in professional situations.

But to add to everyone else's post, there will be a jump in signal gain (note: gain does NOT mean distortion) with the trem removed. If you don't like the jump, a 56K resistor to ground before the PI will load the signal roughly the same as the trem circuit.

[martin manning]

But to add to everyone else's post, there will be a jump in signal gain (note: gain does NOT mean distortion) with the trem removed. If you don't like the jump, a 56K resistor to ground before the PI will load the signal roughly the same as the trem circuit.

If you just clip out the tremolo, you will have control over the no-vibe-just-verb channel's signal level going into the PI via it's volume pot, so the extra gain can be dialed out. To make it as close as possible to the original (including some effect on frequency response through the mixer), the resistance of the intensity pot's element (somewhere around 50k) would have to be retained as Wyatt suggests, but it should go from the junction of the 0.1uF and 220k mix resistor to ground.