Treble Bleed Mod

[motopsyche]

Anyone had occasion to install a "treble bleed" capacitor in one of their archtop Guilds, say a '60 T-100 w/Franz, '63 Manhattan with H/B, or '64 Starfire III with Dearmonds? I just put a .001uf capacitor and 130 ohm resistor on each of the volume pots of a friend's '73 Gibson SG that would go dull and dark when the volume was rolled off. Good golly, now it retains life all the way down to zero.

I've long noticed the tendency of my Guilds to lose treble when rolling off volume. Can anyone share experience from having done something about this?

Many thanks!

Bill
Indianapolis

 

[Kap'n]

I usually do what folks call the '50's wiring' mod.

Essentially it moves the wire connecting the tone control from the "high" end of the volume pot to the middle 'wiper' position. I find it much more natural sounding.

 

[motopsyche]

Hey Kap'n. Thanks for the tip. I'm interested in knowing more about how the 50's mod works. With the stock wiring, what is happening that turns the tone so dark as the volume is rolled off, and why does switching the connection to the wiper make a difference?

Thanks for the guidance. I'm looking forward to giving it a shot!

Bill

 

[Kap'n]

To be honest, I'm not sure how it works, but it does.

It changes the taper of the pot a bit, but I like that, too.

There's a lot of the pros and cons on the LPF.