Messages

Has anyone tried using the expansion board with 4x MN3005s? I know it wouldn't be cheap, but shouldn't that get you close to 1000ms of nice clean analog delay?

Yes, yes I have had that problem.

Jacob

I experienced this on regular TapTation builds when using "clickless" momentary stomp switches, but when I switched to using the momentary switches that click, it seemed to read the time very accurately.

Here's my "in progress" pedalboard:



DIY'd a few years ago from a Harbor Freight "road case style" tool case.  At 18" x 13", it's not quite wide enough to fit all of what I want, so I'll likely build something else.

Signal chain will probably be, when finalized:

Volume pedal from junk yard '60's Hammond tonewheel organ
'89 Dunlop "Original Cry Baby"
Veritas Transparent Boost/OD (simple booster, similar to Emerson Custom EM Drive)
Teleforce Beam Emitter (bufferless TS clone, kinda like Eternity "Burst")
Dirty Red Delay (Sea Urchin with modified part values)
Dirty Red Delay... "I'd Tap that," (JMK modular delay with modulating TapTation, part values mixed up with Sea Urchin and De Profundis)
Prince Charming In A Can (Rump Roast)
Tuner

I have 7 or 8 more pedals that just won't fit at this time...  I think I need a pedalboard at least 24" wide. LOL

I'm curious what would happen if you fed the tap signal into the mirror array... would you get essentially double the delay that your tap indicated because each chip would be delaying your signal by the amount set by the tap switch?

The idea of a longer "clean" delay time interests me... on the ZPDD, with the PT2399's in series, has anyone worked out what mods would need to be made to the mirror circuit connected to the pin 6's to connect to the TapTation "pin 6" pad?  I've considered buying a ZPDD and a TT daughter board and just diving in, but I'd love to hear that someone else has tested it first.  LOL

An update - success!  It works pretty well. It still gets louder than the standard signal, but it hits a point where it doesn't get any louder, it just distorts, which isn't unpleasant, as it turns into a sort of wash/crashing waves sound that is a nice ambient noise.

Hmmmm  I will have to give that a try this weekend.  Thanks!

So, on something like a Sea urchin build, would you just disconnect the wiper of the regen pot from the board and solder a pair of back-to-back diodes between the wiper and it's pad on the board?

Thanks,

Shawn.

I'm tinkering around with various incarnations on PT2399-based delay pedals, and I love the ability to set off runaway feedback/self-oscillation, but the exponential volume increase is killing me.  Is there any way to limit that so you get the great sound of the oscillation without blowing up your amp (or manually turning down the mix on the pedal)?

Thanks,

Shawn.

An excellent suggestion, sir! I will keep my meter handy next time I plug in and test the board.

Oh, I've been soldering a jumper between pins 3 and 4 on all of my PT2399's just to cover that base... it's just weird that it would work for a while and then stop.  Drives me crazy.  At least it isn't boxed up yet.

Can runaway oscillation (in, for example, a Sea Urchin) damage the PT2399 chip or other assorted parts in the circuit?  I assembled a Sea urchin last night, and it worked, though was a bit noisier than usual.  When playing around with allowing it to self-oscillate, suddenly it stopped echoing and started just passing signal.  Tried power reset, waited 5 minutes, etc., it wouldn't start working again.  I then tried no fewer than 4 other PT2399s before I was able to get one working again.

Also, is there a way to volume-limit the oscillation so that it doesn't kill the pedal/amp/listener?

Thanks,

Shawn.

I swapped out the 500K log pot for a 500KB linear and it has a nice even sweep now.  I'm really digging it.  Interestingly enough, it added nice brightness and liveliness to my Carmen Ghia clone amp, making it even more touch responsive and "hi-fi". 

Sweet... thanks, Brian!

I have an old Danelectro Dan-Echo that has what appears to be a tone control that affects only the wet signal...  turn it up to have echoes more like the original signal, roll it back to remove high frequencies from the repeats for a more analog/tape echo sound.

Is there any way to implement such a thing with the Sea urchin?  Replace a resistor with a pot, etc.? I would love to experiment with different values, provided I knew which resistor/capacitor sets were the ones applying the filtering to the wet signal.

Any input would be appreciated.

Thanks,

Shawn.