Search results

Are you by any chance using an OPA2134 from a sketchy place?

No I didn't get around to it but I did build circuits with this kind of blend before!

Use an inverting op amp gain stage (but you'd ideally need to add a buffer in front for impedance's sake and rework or skip the Voice control) Add some high forward voltage hard clippers (LEDs, MOSFETs, 2-3 series silicon diodes) after the soft-clipping (probably the easiest solution) Make the...

Here we go: https://forum.pedalpcb.com/threads/why-your-clean-blends-suck-or-how-to-clean-blend.20986/

Since there have been a couple of threads on the topic of "I want to do this pedal but with a clean blend" and "I want to blend two circuits" and I don't want to repeat myself all the time, here is a bit about clean blends. I have zero electronics background, am a self-taught pedal nerd and...

Yeah that's some rather goofy layout

Since the clean blend question came up a couple times now, I'll make a little Test Kitchen thread about how to implement different blends this weekend.

Since you don't seem to have a buffer in front according to your "schematic", that might be cause of your troubles. Series resistance pots for the mixing as you've drawn it up isn't great. On phase cancellation: as both the muff fuzz and LPB-1 invert the phase, there shouldn't be any issue give...

SC is a Timmy, this one is a Zendrive. They sound different.

Could you post your schematic for this?

Yes. You better also get some OP07s to compare to.

I have mixed experience with metal can LM308s. The H variants I had were just almost unusably fuzzy. AH ones were the best LM308s I have had in Rats.

IMHO, use a TL072 for the input buffer and the second half for a proper summing amplifier so you can boost your clean signal too. The split n blend is only really useful if you don't plan to use the pedal at anything beyond unity gain and really is more like a hacky solution for adding a clean...

You say op amp based then recommend cascaded jfets...

Judging by the schematic also and 2N5457, J201, J113 or similar JFET or their SMD version will work. It is just a buffer.

Well how do you think is the op amp setting itself up to bias? Exactly, through that resistor... These resistors bias and also set impedance. Depending on what comes before it and what op amps you are using, you might want higher impedance, but also too high impedance might not sit well with...

Is there a schematic yet? PPCB one is "coming soon" of course. On topic: the JHS Bender is a slightly modified Hot Silicon/Basic Audio Scarab. It wouldn't be so bad if Josh didn't explicitly state that JHS engineered the circuit specifically... (trigger warning: Josh Scott, lack of eyebrows...

What's the rig you're running it through?

Other than adding that coupling cap you also need a bias resistor to Vref for the op amp stage that is your tone control. Also coming off your tone control there is zero reason to have a 1M series resistor and 1M volume pot in the next stage, you reduce both to 100K or less.

Doubt the transformer is the actual issue. Did you bias it correctly?