Problems with phase 45

[Pimens]

I build the phase 45 project from tonepad, but instead of a phase i got something like a fuzz.
The transistors that i used are bf244a, and instead of the tl072 i used the tl082 chip, wich is a replacement, does anyone built it and had the same problem? or anyone knows what is happening?
sorry for the english, i'm from Brazil....

Thanks

[Paul Marossy]

My guess is that it's due to the type of transistors you used. There's a thread in the archives somewhere where RG talks about the JFETs that need to be used in the Phase 45/90 circuits. Some JFETs don't have the necessary characteristics for use in that type of circuit.

EDIT: Here's that thread http://www.diystompboxes.com/sboxforum/viewtopic.php?t=27188&highlight=pinchoff

[Pimens]

Thanks

[lightningfingers]

Mine didnt work either with those JFETs. I tried BF244 and BF245. Try J201s, they seem to work. I doubt the opamp caused the problem...

[Paul Marossy]

According to RG, J201s aren't supposed to work well in this circuit, but they did just fine for me.  

It's most likely not the opamp. The TL072 is just a lower noise version of a TL082, so don't sweat that part substitution.