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Joyo - JF-33 Analog Delay [gut shots]

Posted: 29 Apr 2012, 06:14
by doof
Hi all, this is my first post, and I really don't know much about circuits, but i have read some people mentioning they'd like to see the inside of this pedal. I just received mine the other day, so i opened it up and took some pictures.

Just my luck though, the pedal arrived defective. I plugged it in and at first, there was virtually no delay effect, just two very subtle, barely audible repeats no matter what position the knobs were in. The next time i plugged it it, it emitted a very high pitched constant beeping. The third time i plugged it in, dead silence.

I hope i took pictures of what you would find useful. If you'd like to see anything else, let me know, and i'll try to get it done before i send it back for a replacement.

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Re: Joyo JF-33 Analog Delay gut shots

Posted: 29 Apr 2012, 06:34
by grrrunge
A couple of shots of the underside of the pcb would be nice :)

Re: Joyo JF-33 Analog Delay gut shots

Posted: 29 Apr 2012, 06:36
by doof
sorry! thought i had uploaded it

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Re: Joyo JF-33 Analog Delay gut shots

Posted: 29 Apr 2012, 08:12
by lolbou
Rebranded PT2399 (CD2399)? Anyway, just like any recent chinese analog delay, it ain't analog. Pretty close to the Belcat-alikes...

Re: Joyo JF-33 Analog Delay gut shots

Posted: 30 Apr 2012, 03:06
by drbob1
IIRC the Belcat/Modtone/Rogue/Washburn has a compander. Does this have one?

And thanks for the pics...

Re: Joyo JF-33 Analog Delay gut shots

Posted: 30 Apr 2012, 03:25
by Dirk_Hendrik
Jep. The large chip under the middle pot.

Re: Joyo JF-33 Analog Delay gut shots

Posted: 01 May 2012, 13:13
by lolbou
drbob1 wrote:IIRC the Belcat/Modtone/Rogue/Washburn has a compander.
I have one here (DLY-503 rev. A, no brand at all, only "Belcat" written on the battery clip) that doesn't have the compander...

Re: Joyo - JF-33 Analog Delay [gut shots]

Posted: 30 Apr 2013, 09:06
by Calambres
A clone of Scott Swartz's PT-80 delay...?

Re: Joyo - JF-33 Analog Delay [gut shots]

Posted: 30 Apr 2013, 16:00
by Govmnt_Lacky
What is the PN on the large chip (U2 above)? Cant make it out.

Re: Joyo - JF-33 Analog Delay [gut shots]

Posted: 30 Apr 2013, 16:18
by lolbou
Govmnt_Lacky wrote:What is the PN on the large chip (U2 above)? Cant make it out.
SA571 is likely (compander).