Rocktave Motorboating

Jaicen_solo · December 05, 2009, 03:06:30 PM

Yeah, I know mate! I'm working from the GGG layout, which has been revised for modern op-amp pinouts.
I meant i've tried TL074's and TL084's, although of course not at the same time!

jimbeaux · December 05, 2009, 03:27:47 PM

Now I see the one you built (mine uses the 4136).

Are you using a 9V battery -or- AC Power Supply?

Jaicen_solo · December 05, 2009, 03:30:27 PM

I'm using a 9v battery, keeping things simple as possible. I've tried a couple of different fresh batteries, to no avail

jimbeaux · December 05, 2009, 04:24:24 PM

A few more "Mr. Obvious" questions.

Since it works fine on the 'scope with a generator - have you tried different guitars?

Maybe try plugging in a keyboard (different volumes)?

iologic · December 27, 2009, 01:22:11 PM

hi there
i've just finished my rocktave divider from ggg layout and hammer page (with lorlin mod) and unfortunately, it's not working...

i've checked all solder joints, diodes and capacitors polarity (i noticed my diodes were both in the wrong way, now they are in the right direction)

i've tried too without IC3 and IC4 : no changes on the sound using tone and fuzz pot

i use IC1 : RC4136N, IC2 : NE571N, IC3 : 4013 and IC4 : 4017

Did i burn something because of the wrong diodes polarity ?

any ideas?

P.S : i tried with electric guitar & synth

oskar · December 27, 2009, 02:22:49 PM

Quote from: iologic on December 27, 2009, 01:22:11 PM
hi there
i've just finished my rocktave divider from ggg layout and hammer page (with lorlin mod) and unfortunately, it's not working...
i've checked all solder joints, diodes and capacitors polarity (i noticed my diodes were both in the wrong way, now they are in the right direction)

i've tried too without IC3 and IC4 : no changes on the sound using tone and fuzz pot

i use IC1 : RC4136N, IC2 : NE571N, IC3 : 4013 and IC4 : 4017

Did i burn something because of the wrong diodes polarity ?

any ideas?

P.S : i tried with electric guitar & synth

This is the place to start!
http://www.diystompboxes.com/smfforum/index.php?topic=29816.0
And maybe you should start a new thread...

Quote from: Jaicen_solo on December 05, 2009, 03:30:27 PM
I'm using a 9v battery, keeping things simple as possible. I've tried a couple of different fresh batteries, to no avail

Post voltages...

Let's go over the unit thoroughly this time...

jimbeaux · December 27, 2009, 04:52:40 PM

4136 won't work with the GGG layout - TL074 will.

iologic · December 27, 2009, 06:07:46 PM

oh
thank you jimbeaux
i don't have any TL074
only TL072 in stock, i will try these

iologic · December 27, 2009, 06:15:18 PM

TL072 is only 8 pins...I'm gonna own a TL074...

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Rocktave Motorboating