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Rocktek ODR-1 Overdrive
Posted: 31 Jul 2022, 19:00
by blackboarcult
Hadn't gotten around to post this one yet.
Another cheapo, yet not awful-sounding one.
The circuit does not seem to stray too far from your standard OD. It has a fairly flat freq response but a limited drive range.
I'll get around to modding it at some point, but the bastard crapped on me shortly after reassembling it and I couldn't be bothered to reopen it.
Trace double-but-not-triple-checked. Pinch of salt, etc.
Have a nice one!
Re: Rocktek ODR-1 Overdrive
Posted: 28 Jun 2023, 18:25
by Aromatic_Brush_6769
Do you know what c21 does? Or the stock value? Mine has that missing for some reason
Re: Rocktek ODR-1 Overdrive
Posted: 28 Jun 2023, 23:02
by blackboarcult
I think it has something to do with the LED, but I don't remember exactly. I'd have to open it again when I come back from holidays
Re: Rocktek ODR-1 Overdrive
Posted: 29 Jun 2023, 10:43
by Aromatic_Brush_6769
blackboarcult wrote: ↑28 Jun 2023, 23:02
I think it has something to do with the LED, but I don't remember exactly. I'd have to open it again when I come back from holidays
Ah fair, honestly I should be glad it's missing then since I got it for free because the guy who had it thought it was busted but the led was just dim lol. Threw a really bright purple on in and it's bright enough now
Re: Rocktek ODR-1 Overdrive
Posted: 15 Jul 2023, 21:51
by guiddruid
C3/C6 and C15/C4 look odd. The smaller capacitor dominates in each case & makes the larger capacitor redundant.
Re: Rocktek ODR-1 Overdrive
Posted: 16 Jul 2023, 02:09
by Manfred
guiddruid wrote: ↑15 Jul 2023, 21:51
C3/C6 and C15/C4 look odd. The smaller capacitor dominates in each case & makes the larger capacitor redundant.
I agree with you.
I would replace these electrolytic capacitors C3 and C4 with a jumper wire, these are a source of failure due to aging over the years.
I guess that C21 is used for LED popping suppression.
To be sure it would be necessary to trace this part of the circuit.
Re: Rocktek ODR-1 Overdrive
Posted: 16 Jul 2023, 10:38
by guiddruid
Looking at the pcb a bit more, looks like the weird looking cap may be due to switching circuit not being included in the schematic.
Re: Rocktek ODR-1 Overdrive
Posted: 16 Jul 2023, 22:23
by LeftPerspective2673
guiddruid wrote: ↑Yesterday, 10:38
Looking at the pcb a bit more, looks like the weird looking cap may be due to switching circuit not being included in the schematic.
That'd explain why mine cuts the sound for a second when I turn it on, it's missing that capacitor. I wonder if it went bad, someone took it out and then left it out because it still worked