Anyone out there modded a DOD DFX9?

[Peasey23]

In one of my many spontaneous bouts of buying cool looking/random older pedals, I've gotten my hands on a DOD DFX9.

Straight off the bat, it'd benefit from a new footswitch and ins/outs as well as a 2.5 to 2.1mm conversion - anyone done any of the above firstly? I reckon I can easily deal with the power conversion (did it on my Rat recently), but would I struggle with the size of 3PDT?

And more fun stuff - I've already altered the internal trimpots, but has anyone got any decent mods they've done? There's not a whole lot online I've seen about it, but they were intended as Boss DD3-beaters/competition.

Anyone had any luck modding these?

[kristopher612]

Hey, i hace one of these too. One thing I did before I started building pedals was to play with the internal trimmers. One of the me allowed the time range to be extended, I believe it was the bias trimmer. This will definitely benefit from a new footswitch.
I do wonder if modulation could be added by tying it to the time control also.

Following to see if there's anything else that can be done with this.

[Peasey23]

Glad I'm not the only one keen to look at what can be done with it! It feels like there's potential for similar mods to the DD3 - analog mod etc.

I might have a go at it myself if I can get my head around it as it feels like it'd be great to get to understanding if changing any of the chips in there might make a major change in things. I'd prefer not to kill it as it's cool, but it only cost me £10!

[ElectricDruid]

I had a bit of hunt for schematics, but didn't find much. Some other similar DOD stuff from the same era uses 4164 or 41256 DRAM chips for the delay memory and a ton of logic to do the addressing (that's a single bit memory! Ouch!)

Can you take a photo of the guts so we can see what chips it's got in please? I'm all curious now...

T.

[Lew-Dawg]

Peasey,

All I can think of are the typical mods people do on the DD-3.

Lots of examples on the site. 

I'm in the midst of mod'n my DD-3.

Lewis

[Peasey23]

Sorry for the epic delay (oh the irony)

Been busy with work and other life BS. Here's a gut shot;

[ElectricDruid]

Umm, bit more modern than some of schematics I saw. That's got Texas 4558 op-amps and a NE570 commander for the analog side, and a TMS4256 256KBit DRAM chip for the memory. The big square thing in the middle is presumably some kind of gate array that deals with all the glue logic - the memory addressing and read/write (must be a bitch with a 1-bit memory) and the refreshing (this is a DRAM). The schematics I saw had most of that logic done with 74-series chips.
A lot of SIP resistor arrays too. I expect some of them are a cheap DAC (R-2R ladder style thing), but the others look to be just to save space.

Sorry, nothing really inspiring to mess with in there.

[Peasey23]

Cheers for the response, ElectricDruid!

I was half hoping to get an analog mod going or even better, find some fun stuff to mess with the infinite mode but never mind eh.