Tremolo-Matic X

[soggybag]

This is nifty tremolo from Stompboxology by Nicolas Boscorelli. This sounds pretty good. It has an interesting sound, which is different from a normal trem, as this pans between bass and treble signals rather just changing volume.

The schematic in the original article is hard to read. I have redrawn it make things a little more clear.

http://www.super-freq.com/?p=130

[head_spaz]

Link to full sized schematic...
http://www.super-freq.com/wp-content/uploads/2009/06/tremx_01.png

[Taylor]

Any chance you could record some sound clips? Although I haven't built or heard this circuit before, it sounds very interesting, and I often feel the way you do about trem speeds: a good trem should be able to go very slow and very fast. Often the best way to do this is to select different feedback caps, one which gets slow enough, and another which gets fast enough, then switch between them. This way you have all the speeds you need,  but without having the rate knob too crowded if you need to zero in on a specific rate.

[soggybag]

Sorry about that I just realize that I forgot to set a link to the source image for the schematic: http://www.super-freq.com/wp-content/uploads/2009/06/tremx_01.png

[Taylor]

Just found the thread where you got the layout, which has a soundclip:

http://www.diystompboxes.com/smfforum/index.php?topic=71061.0

Cool sound. Sounds more like a phaser than a trem to me, but I like it. Any idea if it would be possible to de-sync the low and high tremming with separate LFOs for each? Might make for a cool rotating speaker sound.

[soggybag]

Just found the thread where you got the layout, which has a soundclip:

http://www.diystompboxes.com/smfforum/index.php?topic=71061.0

Cool sound. Sounds more like a phaser than a trem to me, but I like it. Any idea if it would be possible to de-sync the low and high tremming with separate LFOs for each? Might make for a cool rotating speaker sound.

Actually this would be very easy. The 570 is set up as two separate VCAs. The control voltage the treble channel is pin 1 and the bass channel is pin 16. If you built second LFO you could connect this new LFO to pin 16. Leave the original LFO connected to pin 1.

You could probably use U2d and U2a for the second LFO. As is, U2d buffers the LFO and feeds it to pin 1 of the 570 and U2a inverts the LFO and sends it to pin 16 of the 570.