Looking for a diy reverb with short delay time, non FV-1 based.

[temol]

What was the overdrive? Sounded great!

JCM800 pre from Pod HD500X plus 4x12 V30 Mesa impulse response.

Would you be willing to share your pcb layout once it's done? I'm definetely interested

I think so. In the meanwhile - there's a perf board layout available on the author's website.
There's also simplified version of the double tracker - Shadow.

 

[lrgaraujo]

Nice! Will probably give the shadow a try

 

[Feral Feline]

Dang, I'd heard of the Stalker but not the Shadow, and I was going to name my PPCB Doubletracker The Shadow.


Who knows what evil tone lurks within the minds and amps of men (& women)?

 

[temol]

Who knows what evil tone lurks within the minds and amps of men (& women)?

there is always someone who knows

So... I fired the pcb yesterday, worked immediately . Small issue with a TIME potentiometer (it was also present on the breadboard but I was hoping that moving to pcb would solve the problem). Touching (or even almost touching) the pot sometimes generates slight detune/slowing effect, like turning delay knob while playing. It's without the box yet now so no worries for now.

Single sided board, some jumpers. Potentiometers and switch mounted and soldered from the copper side.

 

[Chuck D. Bones]

Looking at the datasheets, the ES56033 is nearly identical to the PT2399. Both use ΣΔ modulators for the A/D & D/A conversion. Both contain user-configureable low-pass filters. Both contain SRAM storage for the delay. Both contain a clock VCO. Both contain an internal bias supply. Both run on +5V. The pinouts are different. The SRAM depth is 32K in the ES56033, 44K in the PT2399. For the same clock freq, the PT2399's delay is 37% longer. Both datasheets leave a LOT to the imagination. The PT2399 provides a range for the clock freq and a table that maps resistor values to clock freq. The ES56033 tells us next to nothing about the VCO, other than two example circuits.

You mentioned that the clock freq changes when you touch the Time pot. If you swap the Time pot and the series resistor (18K in the example circuits), then you'll get some isolation between the pot and the more sensitive of the two FADJ pins.

 

[temol]

Thanks for the suggestion. Just tested it on a breadboard - no difference. Stalker uses 2k2 resistor and 10k pot. But even with higher values there's this effect.

 

[temol]

So, here it is, boxed.

 

[Feral Feline]

That's an awesome looking enclosure, where'd you get it?

 

[temol]

Let me think for a moment.... hm..

 

[Feral Feline]

Now that it's boxed, are you still getting the TIME potentiometer detune issue?

 

[temol]

Yep... but I can live with it. It does not bother me anymore
Especially when the pedal is off

 

[benny_profane]

Let me think for a moment.... hm..

Is that a Hammond 1456 series? Looks great!

 

[fig]

The PT2399 data sheet has a minimal parts delay/echo schematic. I've breadboarded it at the end of a muff-type circuit. A bit noisy with the routing but it does get the job done. A few component tweaks might get you to the desired time.

 

[temol]

Is that a Hammond 1456 series? Looks great!

It's my own design and execution.

 

[iamjackslackof]

It's my own design and execution.

It looks absolutely killer. Did you powder coat folded metal or something?

 

[Cybercow]

I was going to suggest the Stalker, but finding the ES56028 IC might be tricky.

I mean the ideal answer would be an MN3011 (or some other BBD contraption), but that's probably not a realistic solution.

FWIW, the ES56028 is available from a few reliable eBay sellers. Just check their ratings.

The MN3011 is available too. But the lone vendor wants $45 for each one.

 

[temol]

Did you powder coat folded metal or something?

Exactly. 1.5mm thick aluminium sheet.

https://forum.pedalpcb.com/threads/sheet-metal-enclosures-inspire-me.11888/page-5