Analog Delay

[JustGlyphs]

TC Electronic Bucket Brigade came out today and I think an analog delay would be a fun build. Something weird and with character ideally. No idea how difficult tap-tempo is to implement.

Some options for inspiration: Fairfield Circuitry Meet Maude, Teisco Delay, Jam Delay Llama, Way Huge Aqua-Puss, Mythos Oracle, DOD Rubberneck, MXR Carbon Copy, Ibanez Analog Delay, Boss DM2, Bondi Art Van, JHS Panther Cub, TC Electronic Bucket Brigade (maybe borrow the circuit design but upgrade components?), Seymour Duncan Vapor Trail, J Rockett Clockwork, Donner Yellow Fall

 

[Username123]

Do you got 30 bucks to drop on BBD's?

 

[Coda]

Might as well do a DMM…

 

[giovanni]

I was quite impressed with the Clockwork but maybe it has digital controls.

 

[Big Monk]

El Cap does it all for me including very good BBD delay.

 

[WheatAndBarley]

They can be challenging and expensive builds. Madbean has a bunch of analog delay builds though, I've built their DMM and absolutely love it.

 

[zgrav]

Based on a recommendation from the forums I am in the process of finishing a DC-Echo build from Lectric-FX. As noted above, parts costs add up pretty quickly.

 

[benny_profane]

Based on a recommendation from the forums I am in the process of finishing a DC-Echo build from Lectric-FX. As noted above, parts costs add up pretty quickly.

Sorry

 

[zgrav]

Sorry

Not a complaint! Just noting that for others. I am psyched about this project.

 

[giovanni]

Damn, at $22 a pop for the Xvive MN3005, the DC-Echo has a starting price of $66 plus PCB, enclosure, etc... Quite steep, really for the analog delay purist! How does it sound?

 

[zgrav]

As was pointed out to me -- Synthcube has the chips for $15 each. I am interested in seeing how this performs. The board also uses a 571 compander to compress the signal and then uncompress it to improve the signal to noise performance.

 

[giovanni]

$15 is much better, but still relatively expensive. I may still build one

 

[PangeaDestructor]

Based on a recommendation from the forums I am in the process of finishing a DC-Echo build from Lectric-FX. As noted above, parts costs add up pretty quickly.

Fun build, biasing this thing is a serious challenge, though.

 

[giovanni]

Where does one get a 571?

 

[Betty Wont]

Fun build, biasing this thing is a serious challenge, though.

I was going a little buggy going back and forth with the gain trimmers trying to balance things out when I made a discovery. Gain1 and Gain2 determine when and if the feedback knob sends to circuit into runaway oscillations. Instead of using an audio probe and test points, I plugged in a guitar,
I set it to short mode, and turned the delay and feedback knobs all the way up. I adjusted Gain1 until it just started to runaway. Then switched it to long mode and did the same with Gain2. This gave me a perfect level balance across both modes and blend extremes. And it goes into runaway feedback in both modes only when the knob is all the way up

 

[Betty Wont]

Where does one get a 571?

V571D - Dual Compander IC

V571D Coolaudio IC - NE/SA571 Equivalent

stompboxparts.com

I used to get them from smallbear.

 

[benny_profane]

I was going a little buggy going back and forth with the gain trimmers trying to balance things out when I made a discovery. Gain1 and Gain2 determine when and if the feedback knob sends to circuit into runaway oscillations. Instead of using an audio probe and test points, I plugged in a guitar,
I set it to short mode, and turned the delay and feedback knobs all the way up. I adjusted Gain1 until it just started to runaway. Then switched it to long mode and did the same with Gain2. This gave me a perfect level balance across both modes and blend extremes. And it goes into runaway feedback in both modes only when the knob is all the way up

I might revisit my build and try that method. The settings I have now from the procedure listed in the build doc are fine, but I might want a little more rotation out of the feedback control before it gets to runaway feedback.

 

[PangeaDestructor]

I was going a little buggy going back and forth with the gain trimmers trying to balance things out when I made a discovery. Gain1 and Gain2 determine when and if the feedback knob sends to circuit into runaway oscillations. Instead of using an audio probe and test points, I plugged in a guitar,
I set it to short mode, and turned the delay and feedback knobs all the way up. I adjusted Gain1 until it just started to runaway. Then switched it to long mode and did the same with Gain2. This gave me a perfect level balance across both modes and blend extremes. And it goes into runaway feedback in both modes only when the knob is all the way up

Thanks for the tip! Mine's still a little off, so I'll try this over the weekend.

 

[zgrav]

I really like the DC Echo. Set-up was pretty methodical. I used the suggestion of setting the gain trimmers to oscillate at the max CW rotation. Lots of great sounds bouncing around in this build. Thanks for the suggestion.

I also ordered and built the Flintlock Flanger from Lectric-FX. The PC board can work with a MN3007 or MN3207 BBD, and I opted for the MN3007. A challenging fit into a 1590BB box, but well worth the effort. The DC Echo and Flintlock together make for some deep dives into modulation land. Most fun pair of builds I have done in a while.

 

[Bricksnbeatles]

I have like 12 BBD boards to build. I’m gonna be sooooo broke