OT: LEDs for amp channel switching

[Douglas Baldwin <coyotelk@optonline.net>]

Hi Crew-
    This is way OT, but I'll bet one of you loopers just might be the DIY
brainiac to solve my problem.

I just purchased a Carvin V3 amp head - great sounding 100-watt EL34
monster, by the way - but the channel-switching footswitch has no LEDs on
it. There are three channels plus a "boost" function, and all four
footswitches are simple SPDT switches with one lug unused. I figure it 
would
be fairly easy to swap the SPDTs for DPDTs or, if necessary, those groovy
Fulltone triple-throw DT switches, drill holes in the switch housing, add
LEDs and a 9V battery, and I'd be rocking.

The problem is, I can't find a schematic that would cause just one channel
light to be on at a time. I'm boggled about how to wire it so that if, for
example, I'm using Channel 1 and want to change to Channel 2, when I press
switch #2 (for Channel 2), the LED for switch #1/Channel 1 goes off and the
LED for switch #2/Channel 2 goes on. So among the three channels, only one
LED can be on at a time. The 4th (boost) switch would remain on or off
regardless of which channel is on (that one's easy).

    I spent about an hour the other night doing Google searches on all 
kinds
of guitar and amp DIY sites, and I checked my Craig Anderton books, and I
couldn't find anything for this other than to get into some kind of solid
state switching chip, which I'd rather avoid. It SEEMS like it would be a
simple enough circuit WITHOUT any chips or boards, but I don't do this kind
of thing often enough to figure it out for myself.

HELLLLLLLPPPPP!

Douglas Baldwin, coyote-at-large
www.thecoyote.org
coyotelk@optonline.net

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Clouds and clowns!
You don't have to come down!"
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