I'm using current sinks, which seems to do the job!
Sonomatic Delay
- Thread starter chongmagic
- Start date
giovanni
Well-known member
Are you the designer of the circuit?!? What do you mean by current sinks?
chongmagic
Well-known member
I think he is!
I think this is one of those "must build" projects if you have any use for or interest in delay.
That's the one that hipped me to the project. I think the YouTube algorithm just decided I needed that one when I went down the delay pedal rabbit hole.
giovanni
Well-known member
That’s a cool demo. I find it a bit confusing that each head is labeled with 200ms, 400, 600, 800, given that the delay time is actually adjustable via the tape speed. Is it 200ms at max tape speed? I am quite impressed with how well tuned the repeats are. The PT2399 is a pretty noisy chip but it sounds quite clean in these demos. Very cool stuff!
Its been a while, but yes I am! Basically I'm just using a transistor (BC550B for the Sonomatic) to limit the amount of current that's going from pin 6 of the PT2399's to ground. In all honesty, this has been done in many other PT designs but seems to be working quite well in the Sonomatic circuit. For a more indepth explanation check electrosmash.com for his excellent report on the PT2399, 'controlling the delaytime with pin6'
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The 'ms' references refer to the max. delaytime per head/tap, and as the PT's are routed in series the max delaytime in total would be about 800 ms on tap 4. The minimun delaytime (with tape speed set to fast) on head/tap 1 is about 50ms.
Will there be more PCB's available?
I still have a few boards for the Sonomatic available, but a new batch will be arriving later this month. But in general, I do stock the boards for my projects
giovanni
Well-known member
Very cool! This is a great design man, I look forward to building one!
Harry Klippton
Well-known member
I'd watch it
jjjimi84
Well-known member
That's why your the best!
I see the Reverb listing ended. I guess that means waiting on the new batch before it's available again.I still have a few boards for the Sonomatic available, but a new batch will be arriving later this month. But in general, I do stock the boards for my projects
Well, actually I have a single board available if you want it. Then again the new boards will be here within the next ten days or so ...
Thank you. I have so many PCBs to get through at the moment. I can wait on the next batch and let someone else get their fix just that much sooner with this one.
Bricksnbeatles
Member known well
new boards on the way for the purple as well?
Haha, tell me about it. So many PCB's (and builds that still need an enclosure) waiting ...
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