Mod circuit for SB-2

[rok51]

Hi Ken. Just came across this and thought it might be relevant to the question that I posted in my "SB-2 will this work?"thread. Is the lower schematic the one that you would recommend for concentric volumes and master volume on the Tribute SB-2?

Should I try to locate a A250K/A250K concentric pot? The only one I have found is the Alpha concentric (other than the modded CTS pots that outrageously priced on eBay). Would this work, or is it too long?

I really like the stock setup for my tonal needs, it just is problematic for me when I need to adjust my volume and not adjust the interplay between the bridge and neck pickups.

As always, I trust your judgement and welcome any suggestions/parts you might recommend.

Kim

[Ken Baker]

Hi Ken. Just came across this and thought it might be relevant to the question that I posted in my "SB-2 will this work?"thread. Is the lower schematic the one that you would recommend for concentric volumes and master volume on the Tribute SB-2?

I had to revisit these circuits...

Yes, this would work. Just be sure to solder ground points at the pot cans and NOT the solder lugs.

Should I try to locate a A250K/A250K concentric pot? The only one I have found is the Alpha concentric (other than the modded CTS pots that outrageously priced on eBay). Would this work, or is it too long?

Take a look here. The 500KΩ pots will add some brightness to your sound, so unless that's what you want use the 250KΩ.

I really like the stock setup for my tonal needs, it just is problematic for me when I need to adjust my volume and not adjust the interplay between the bridge and neck pickups.

I added a tone pot to my old SB-2, thinking I would like it. It turned out to be useful (to me) to reduce the zing of new strings and that's about it. After I standardized on Infeld Superalloy strings, which sound broken in when new, the need for the pot went away. Leo really did know what he was doing with just volume controls.

I never did try a master volume, and that would have more utility for me.

As always, I trust your judgement and welcome any suggestions/parts you might recommend.

Thanks! Just keep a wary eye on me. You never know where I might go.

Ken...

[rok51]

Thanks, Ken (and Deltafred)!

Kim

[LoveThatBass]

https://www.ebay.com/itm/333141186026?m ... media=COPY

250k/250k Alpha Concentric potwoth solid shaft

[rok51]

Well, with the schematic in this thread for master volume and the forum's help, I was able to successfully rewire my Tribute SB-2 to have a stacked volume 250KA/250KA potentiometer with the top being the neck pickup and the bottom being the bridge pickup. The old neck pot became the master volume. I was hoping that I would be able to set the desired blending between the two pickups to achieve the tonal balance that I was able to attain with the stock volume/volume setup and then be able to adjust the overall volume without interfering with the preset pickup balancing. I did not add the treble bleed capacitor.

It worked! I would prefer a lower profile knob set, but there's a limit to how low the top knob will go due to the 8mm lower shaft, so that may be out of reach.

Thanks all!

Kim

[LoveThatBass]

Glad it worked well for you. Here are some low profile Concentrics among others
https://www.guitarpartsfactory.us/index ... y&path=528

[Ken Baker]

If you guys have a few minutes, and are willing, please post your parts resources in this thread.

Thanks!

Ken...