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Thanks. My bad. I intend to use the pedal for low to medium gain so I think this will work. In addition, I plan to leave out all the diodes except the power supply diode..

I think this is just what I was looking for as I want to build a -2w version. However, could you please confirm that there are no typos as the "2M &" entry for R2 seems to be missing something after the "&", also the R18 change from 1M to 10k seems large. Do you recall if the -2w mod got rid of...

I haven't built an amp, but I read that one key step before putting tubes in is to check voltages at all the important points. You might need the rectifier tube in to do that. If all the tube sockets are getting correct voltages then the problem is probably on the signal path, and in your case...

I've noticed the pedal sometimes produces a faint hiss and occasionally a pop or two. I tested the connections and pots, and noticed that Sag is noisy. This is probably because it is a voltage divider, and might be the source of the noise. Would be interested to know if others hear that...

I think the low idss numbers might be due to the tester.using only 4v but I'm not sure about that.

I haven't done a side by side yet, but like you I aim to have all my pedals be DIY, so I have a compressor and Muff sitting idle as well as the DM-2W...

For this week's build I went with the Seabed delay as I was hoping it would replace my expensive DM-2W (the sale of which will buy enough components to build about 4 pedals). I'm not disappointed. I got the PT2399 from Tayda for $0.79 and it works great, so no problems there. Overall, the build...

Put together a Park and Ride yesterday. I ran out of imaginative names so just called it 'Wah' so friends can have some idea of what it is. One issue was that the TL074 is not a 16 pin IC, but a 14 pin, so I had no sockets for it and had to solder it direct. Another was that it requires a 4u7...

Ah yes I see. I was wondering how they would be able to drop the whole lot in the case with side jacks, but there you go.

Interesting that they managed to put the whole pedal on one pcb with no offboard wiring.

The key skill in pedal building is soldering. Watch a few youtube videos on how to solder and then practice on junk electrical waste until you can easily solder joint after joint and keep the tip clean. Then, and only then, try to build an Aion FX kit. If your eyesight is less than perfect I...

I went the SMD + TO92 board route with this one as I read that J201 idss is critical for getting the FETs biased. I ordered 10 MMBFJ201 from Tayda at 42 cents each and 9 TO92 boards from Osh at $1.40 total (including shipping !!). Soldering SMD was a new experience so it took a while but after...

Thanks for that link. My component tester was giving me readings of 100-300uA for my 8 SMD J201s so I didnt trust it. I built that circuit and tested for idss and they were 300-670uA, so all good. Note that for idss testing only, all you need is a 9v battery, 100R resistor, and a multimeter...

I did too. You just have to be careful to use them correct side up - I believe the correct side for a TO92 conversion is D-S-G. If you solder the FET to the other side the pinout is different. As these boards are so small, I had to use a magnifying headset to figure that out....

Help me out here - I last did an EE class in 1982. What I see on the schematic is that with the pot at 0%, the pot is open, so there is 0 resistance and the cap is bypassed, so maximum signal flows. With pot at 100%, you have the pot at 250k in parallel with 390k and 2n2, which is 152k || 2n2...

On second look it does seem the Clip adjusts level into the opamp by changing the resistance of the coupling resistors. The clipping diodes appear much later in the signal chain.

I was using two guitars, both with humbuckers, but one was.tapped. From the circuit diagram I think the clip function is a simple hard clipper, so it limits the signal and adds a little grit.

Next up on my list of winter pedal projects was the 401K, which I just completed. This build specified some resistor values that I didn't have (27k->22k, 56k->47k or 68k, 390k->360k, 4M7->2M), so I had to make some decision about what matters and what doesn't when subbing in other values. Also...

Yes I have a Chop Shop pcb ready to build. Regarding build quality, look at the image of the internals - ouch...

I'm going to test it some more today, this time (as the wife is out) with the amp cranked up to 'greater than bedroom' levels.