See attached. You can see that the diode polarity is always cathode down, anode up, for all five of the diodes. The underside photo is small, but you can make out the corresponding jumpers in the upper left. So I still think the schematic I drew is correct, but I do welcome a second set of eyes!

I couldn't find any record of anyone cracking open a Bass RC Booster, so I did one along with the AC and RC traces. (They all share the same PCB, so the second and third ones go pretty quick once the first one is down!) xotic-bass-rc-booster-trace-schematic.png Not much changed from the standard RC ...

I traced a recent RC Booster since there are a few different schematics out there and I wanted a definitive trace. xotic-rc-booster-trace-schematic.png The only real change from earlier schematics is that the input capacitor C7 is 1uF instead of 47n. No real difference in tone since the cutoff frequ...

There are a lot of discrepancies in the AC Booster schematics floating around, some perhaps due to tracing errors but most of them just due to Xotic changing things along the way since they are known to tinker incessantly with their circuits. My thirst for accuracy got the best of me, so I traced a ...

Not loving the new font... any way you could make a new "FSB Classic" theme that puts things back the way they were? I don't mind the broader graphic tweaks from the forum upgrade, it's just the font change from a few days ago that's throwing me for a loop. I first tried switching back to the defaul...

Manfred wrote: ↑

17 Jun 2020, 17:20

Only a year late on seeing this, but it was a Peak Atlas DCA55 which uses a test current of 2.5mA.

Thanks, did you also measure the voltages on the transistor terminals in the original pedal?

Nope, I don't think I did.

Manfred wrote: ↑

22 Jul 2019, 16:05

An original Superfuzz that I measured had the following transistor gains:

What is the measuring collector current of HFE meter?

Only a year late on seeing this, but it was a Peak Atlas DCA55 which uses a test current of 2.5mA.

Ben, Thanks for the info - yeh, your right I wouldn't need to make the 'unused' jack sockets void - I'd just leave them be...I wouldn't want to input two sources or output to two amps anyway. I've often wondered why nobody offers this sort of layout as it would be super versatile? I'm about to buil...

Make sure to put it in the most obscenely large enclosure you can find!

im confused. are the mode selection switches for the dc-2 SPDT or DPDT? Two need to be DPDT, one can be SPDT (but little point to sourcing a second type of part when you can just use another DPDT instead). The first switch on the DC-2 just disengages the other three switches, so if you're building ...

According to the Premier Guitar review , it's nothing more exotic than 2N3904s. I'm curious too, but I ain't shelling out $150 for a BJT booster. In that same review they say it's a clone of the Univox Uni-Drive UD50 - here's the FSB thread on that one: https://www.freestompboxes.org/viewtopic.php?...

Looking at the lowCut A pot, actually it is a variable lowpass filter so it cut the high not the bass. @aionios are you sure of the dual gang of this pot? I think that the dual gang pots are those named LowCut A and HiCut as those two pot form a lowpass filter and cuts treble from the signal. Very,...

I haven't ever seen them used anywhere outside of the Cool Cat series so I am pretty confident they would have had them custom made. The only other shot you've got is if you can see a part number in the plastic mold for the switch - sometimes just googling whatever numbers you can find will turn up ...

I started a new thread for the trace, details are here:

https://www.freestompboxes.org/viewtopic.php?f=7&t=30219

Okay, so I've been keeping a secret - I actually traced two Cornish pedals this summer, not just one. (The other is the OC-1 Optical Compressor .) The SS-3 is an update to the earlier SS-2, which had been sort-of traced by way of the Skrydstrup ODR-2 which was rumored to be a clone of the SS-2. But ...

All right, the legendary Mystery Pedal™ is finally done! I traced the Cornish OC-1 Optical Compressor over the summer and today I'm ready to share it. Pete claims this is an all-original circuit design, and fortunately I can confirm that it's not quite like anything I've seen before. The audio path ...

Maybe photo evidence can help clear things up... mine is a Motorola MC14069UB for IC4. The pads on the trace side are fully lacquered with the rest of the PCB, indicating it's never been replaced or repaired. pearl-ph03-pcb-1600px.jpg I can only imagine that there are two versions. Maybe the 4069 wa...

madras wrote:Can anybody confirm is aionios' schematic an actual SD Storm schematic? Some photos showin orignal Storm internals would be welcome.

Linked in the very first post - several angles of the populated PCB as well as front and back with components removed.

Designing this in too small a foot print and using design choices more appropriate for digital circuits does not help you achieve all that you can ring out of the schematic design intent. You can of course can get the layout to work to some level, but not the best you could achieve tone wise. with ...

i have see the led arangement 10k led 2k if you look to the pcb you will see it is not exactly like this( but this is for the led) c6 in the schematic is not polarized but if you look the pics you will find a 1uf polarized the rest look ok but i have not finished all the verification i can see ^^ M...