What's your nemesis circuit?

[Matopotato]

Phase 90. Built 2 or 3 and they work as they should, except they double as an AM radio (RF as loud as the effect)

Any difference where you put them in the chain order?
Git - Pase 90 - amp tested?

 

[lrgaraujo]

Any difference where you put them in the chain order?
Git - Pase 90 - amp tested?

Yes, that's how I usually test a new build.
It got better in the studio (my place picks a lot of radio), but it was a lot, even then

 

[Matopotato]

Yes, that's how I usually test a new build.
It got better in the studio (my place picks a lot of radio), but it was a lot, even then

I have used shielded wire for builds with porential risk like flanger, phaser etc.
At least on the input wire. It can be a bit of work and the signal wire easily breaks. Also the shield needs grounding in one end only in case you try this.
Duo Phase I think I did them all with shielded, then had very different phasing on A vs B. So experimented with LED strength which forced me to un box a few times... so of course the shielded wires broke off a few times.
Building pedals can be a test of character and patience. Like some Zen thing...

 

[Scruffie]

Yes, that's how I usually test a new build.
It got better in the studio (my place picks a lot of radio), but it was a lot, even then

Have you tried a small cap from the input to ground?

 

[Matopotato]

Have you tried a small cap from the input to ground?

How small?
(Assume it goes in like a pull down resistor?)

 

[Scruffie]

100-200pF to ground after the 10k resistor should cover RF without impacting frequency response.

 

[p_wats]

There was a time a few years ago where I was frying FV-1 chips like crazy (killed about 5 of them). Never figured out how/why it was happening. Have built other things in the meantime, and bought new FV-1s, but haven't had the guts to try them again since

 

[dcfvgb]

John Hollis Flanger, tried several times on diefferent prototyping boards, never got it to work