Build report : EA tremolo

[MartyB]

 Like someone else said it approximates the fender amp tremolos very well.  It is much better than my two pulsar trem builds, but you give up the "chop" selection switch feature. The rate on mine varies between 104 and 416(approx) beats per minute, comparing to an electronic metronome.  A couple of notes:  I used a 100k linear pot for rate with lug 3 as in the Runoffgroove perf layout, but  instead of grounding lug 1, I connected it to 2 (wipe) with an 18.7k resistor (military?).  This gave me a better range of responsiveness to turn.  I'm not sure if it approximates reverse log, but it works.  Thanks to all the guys that contributed to this great design.   

[runmikeyrun]

i've really been thinking about breadboarding this circuit, but i'd like to try to get a faster trem out of it... is there a simple way to do so?  Otherwise, i like the sound samples at ROG and the build looks quite simple.

[Paul Marossy]

I still like my EA Trem. 

[d95err]

i've really been thinking about breadboarding this circuit, but i'd like to try to get a faster trem out of it... is there a simple way to do so?  Otherwise, i like the sound samples at ROG and the build looks quite simple.

I'm planning to build this one too. In Torchy's layouts there is an EA Tremolo layout with a simple rate doubler switch. It simply switches in an extra 2M2 resistor in paralell with the first in the R/C LFO network.

[squidsquad]

On the right of the ROG schem (left of the out-pot) is a trio of 1uf caps....change these to .68's for more speed.

[d95err]

On the right of the ROG schem (left of the out-pot) is a trio of 1uf caps....change these to .68's for more speed.

Seems a lot easier to adjust the 2M2 resistor though... (and makes it possible to switch with only an SPST).

[RDV]

I like mine too, but would like a faster rate as well as a faster slowest rate, so I think I'll do another one with .68µF caps since I've got a bazillion of them.


Spam Alert:
PM me if you'd like some of the bazillion. Ten cents a piece or trade for something I might need. They're really nice Mallory 50v Box type MKT with a nice small footprint. Order some and I'll through a bunch of 470k resistors in free!

RDV

[alfafalfa]

Hi,

I built my EAtrem some time ago and am happy about it for one thing I would really like it to be smoother than it is already so I am thinking of using a sinus wave oscillator in it .
Would anybody know if it would work.

I would like to post the jpg of a simple sinus oscillator but don't know how !!
Could somebody please explain ?

Tia,  Alf