Flipster noise issues........

[Bernardduur]

OK, I build the Flipster a long time ago and never looked back. The unit is THE way to get MY tone; I love it to death! I used 4x J201's with the FET's biased at 6.8V

But now my issues; there is a lot of noise. Just a lot of hiss (I use the unit with bass at 100%, treble at 75 or 100%, gain at 50% and volume at 75%) that kinda annoys me.

Is there a way to get rid of that hiss? Is it the parts I used (so are some caps / resistors / etc more hiss making then others)?

Oh, btw, I have it with all my basses and when nothing is plugged in, so it comes from the Flipster.

Thanks!

[MartyMart]

Have mine biased at between 4.5v and 5.5v , could that be the problem .. any "subs" ??
I dont have any noise at all, but used a couple of MPF102's for lower gain  Q1 & Q4
I would suggest trying out several other Jfets to find some "optimum" ones, this has worked
for me on several fet builds.

MM.

[Bernardduur]

The 4.5V works quite good; no more noise at all.......

Shame is that I liked the tone I could get with the unit at 6.8V....... guess I need to find THAT tone again with these settings.

Thanks!

[MartyMart]

The amount of "JFet variation" in my Jfet builds is driving me nuts !!
You really have to go through dozens sometimes, to get a nice sounding set!
Try the ROG calculations ( new Fetzer valve ) and use some "closely matched" ones for IDSS etc
I've tried this once ( in my sovtek sim ) and the results were way better
You may even get "that tone" back ....

MM.

[Bernardduur]

OK, will try!

[MartyMart]

The intersesting thing about the new fetzer, was using both source and drain trimpots
I can get the same tones by adjusting drain bias low and source bias higher and vice/versa !
Very cool but kinda "wierd" to my muso brain

MM

[Bernardduur]

OK..... I have to open this one again!

As I tried it during practise last night, the "noise" is back again. I just didn't push the pedal enough...... so I need to ask the question again.

I guess it is due to the fact I play with my bass and treble all the way up to get that mid-cut sound, but by this boosting the treble so high I get the "noise".

As I stated before, are there any components (as caps for example) that are quite noisy / can create noise when pushed too much

Thanks!