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Re: K 250-4 amp [message #15596 is a reply to message #13245]

Sat, 07 May 2011 20:32

triceratops
Messages: 7
Registered: May 2011

Junior Member

Hey Pleat,

I have the 1972 Kasino version of the 250-4 amp and 4 x 12 cabinet, the "Little Joe" and I am trying to make a footswitch and boost pedal for it. The amp has a nice schematic glued to the chassis, but the drawings don't include the footswitch or pedal circuitry just the jacks for where they connect to the circuit.

Instead of the 6-pin connector for the footswitch described above for the Kustom 250-4, the connection for the footswitch on the Kasino is by two ring-tip-sleeve 1/4-inch phone plugs. One plug is for reverb and tremelo, the other is for Fuzz and Boost. The boost pedal also connects by a third ring-tip-sleeve plug.

My questions:
1. What is the value of the potentiometer for the boost pedal? Linear or audio taper?

2. What is the correct way to wire the potentiometer to the ring-tip-sleeve jack?

3. Because the Kasino has fewer wires going to the footswitch than the Kustom, I assume the Kasino footswitch has no lights?

4. All the controls on the panel seem to work without the footswitch plugged in except the boost control. Even with the footswitch connected, I can't notice any effect of the boost control. Does the boost pedal need to be connected for the boost control on the panel to work?

5. Is there an owners manual available for this amp anywhere?

Thanks for your help!

http://img823.imageshack.us/img823/7928/img3573u.jpg

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