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Re: Fulltone - OCD

PostPosted: 16 Nov 2018, 08:57
by Manfred
gsb wrote:Hi,
Here some pictures ,all SMD.Q1 transistor is marked with MX. I have played one more time -pedal works fine all controls are fine ,no led .I have check voltages on q1 . Measured voltage about 9,06v pin2 -S,8,6v on pin 3 -D and 9,06 on pin 1 G. Voltages are equal in off and on mode!! I think it must be Q1 ?
gsb


Or perhaps the connection to the switch.
Could you please trace the switching circuit?

Re: Fulltone - OCD

PostPosted: 20 Nov 2018, 20:39
by gsb
hi,
I dont work usualy with SMD ,Friend need the drive ,i have disabled q1 and put bs250 in and shorted the legs .Now led is working .I hate fu....g SMD.Sorry i cant trace this build.Pedal is working very good .
thanks for help
gsb

Re: Fulltone - OCD

PostPosted: 20 Nov 2018, 21:10
by Manfred
gsb wrote:hi,
I dont work usualy with SMD ,Friend need the drive ,i have disabled q1 and put bs250 in and shorted the legs .Now led is working .I hate fu....g SMD.Sorry i cant trace this build.Pedal is working very good .
thanks for help
gsb


The main thing is, the LED is working again.
I agree with you in SMDs.

The Fulltone Custom Shop CS-OCD-Ge

PostPosted: 21 Jun 2019, 19:33
by x-tn
https://www.fulltone.com/products/custom-shop-cs-ocd-ge

"The earliest OCDs used 2 x Mosfets plus 1 x Germanium diode, but very quickly these diodes became harder and harder to find, and they became expensive.

Recently I stumbled across a reasonably large stash of the right kind of Germanium diodes so I ponied-up and bought all of them. I then decided to do a small run of the ultimate OCD: a Custom Shop offering with a few circuit tweaks, 2 x Mosfets plus 2 x Germanium diodes...

The sound? Great definition, more tube-like feel, a bit wider dynamic range, more sustain, and a more focused single-note tone."

Re: Fulltone - OCD

PostPosted: 21 Jun 2019, 20:07
by caspercody
So do they have a GE per MOSFET for the clipping? With orientation opposite of each other?

Re: The Fulltone Custom Shop CS-OCD-Ge

PostPosted: 21 Jun 2019, 22:02
by Cigla tel.
x-tn wrote:https://www.fulltone.com/products/custom-shop-cs-ocd-ge

"The earliest OCDs used 2 x Mosfets plus 1 x Germanium diode, ....................
.........................

The sound? Great definition, more tube-like feel, a bit wider dynamic range, more sustain, and a more focused single-note tone."

Do you believe in these fairy tales? :lol:

The title talks everything: "COMING SOON!.. The Fulltone Custom Shop CS-OCD-Ge."!

IN TRANSLATION: "It's time to fooling the fool"!!!

:lol:

Re: Fulltone - OCD

PostPosted: 30 Jul 2019, 23:05
by rpc66
caspercody wrote:So do they have a GE per MOSFET for the clipping? With orientation opposite of each other?

Ditto
Is the OCD-GE the same as the original but with an added diode? And is it in-line with the first MOSFET?