EA Trem build has noise/hiss, is JFET/transistor selection critical?

Started by Nocaster Cat, February 17, 2014, 12:59:52 PM

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Nocaster Cat

Title says it all. I would like to get the circuit a little quieter if I can. It's the GGG build, are there parts I should be testing and selecting for noise? Thanks.

Davelectro

What kind of noise are you getting?

I've built several jfet-buffered EA Trems and most of them were dead-silent, except for those with the "rate led" mod (ticking noise, you know).

Shielded cable is really helpful.

Davelectro

Sorry. Double post.

Nocaster Cat

Quote from: Davelectro on February 17, 2014, 06:41:20 PM
What kind of noise are you getting?

I've built several jfet-buffered EA Trems and most of them were dead-silent, except for those with the "rate led" mod (ticking noise, you know).

Shielded cable is really helpful.

Hiss when engaged like the kind you get with an OD pedal. I'm not expecting it to be dead silent, just wanted to know if JFET selection was important. Thanks!

duck_arse

should be dead quiet, and not tick. do you have C9 and C1 fitted? if so, pull C9 and link across. it shouldn't be there.

can we see your build?
granny at the G next satdy eh.

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duck_arse

while we are waiting for the pics, I'll ask a stupid question. does the hiss get louder and softer with the trem? does the hiss get deeper/shallower with the depth pot setting? two stupid questions.
granny at the G next satdy eh.

samhay

Is it noisy if you run it on a battery?
Most EA tremolo layouts don't include power filtering, so they can make quite a racket if you power them with a wall wort (but this can be fixed).
I'm a refugee of the great dropbox purge of '17.
Project details (schematics, layouts, etc) are slowly being added here: http://samdump.wordpress.com