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PostPosted: Fri Jul 07, 2017 8:02 am 
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Hi ,

I have two Classic Overdrives that I have been stacking together for years. I've recently been trying out different overdrives and the only one that I like as much as the BYOC 808 is the Maxon OD-9 (TS9). What I would like to do is add a toggle switch to the enclosure that switches between 808 and TS9 specs.

Where are the Classic Overdrive's 100 and 10K resistors that make it an 808 vs. a TS9? Is it the two resistors together on the bottom right hand side of the board? Also, how do I wire the toggle switch? I'm assuming I just need a mini on-on switch. Wire the 4 resistors to the toggle and then the toggle to the pads?


Thanks!
Ben


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PostPosted: Fri Jul 07, 2017 10:19 am 
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bsport wrote:
Where are the Classic Overdrive's 100 and 10K resistors that make it an 808 vs. a TS9?

R15 (100R) and R16 (10K) on the labeled PCB diagram following:

Image

bsport wrote:
Also, how do I wire the toggle switch? I'm assuming I just need a mini on-on switch. Wire the 4 resistors to the toggle and then the toggle to the pads?

For better long-term reliability, I would suggest using a 4PDT toggle switch, which will allow you to solder the switched resistors across the pairs of adjacent throws. This avoids "hanging" resistors off the switch, which can result in broken leads through handling & use over time. Wire it as shown below; I'll leave the challenge of deciding the best way to mount the switch up to you. Personally, I'd have the toggle bat coming out of the side of the enclosure.

Attachment:
4PDT_toggle_resistor_switch.gif
4PDT_toggle_resistor_switch.gif [ 4.04 KiB | Viewed 3641 times ]

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PostPosted: Fri Jul 07, 2017 10:46 am 
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Thanks!


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PostPosted: Fri Jul 07, 2017 10:56 am 
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Don't know if this will be helpful to you in mounting the switch, but here's a shot of a modified Classic OD that I built with two DPDT toggles mounted through the side of the enclosure.

Image

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My Website * My Musical Gear * My DIY Pedals: Pg.1 - Pg.2


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