K-250 amp [message #22955] |
Fri, 22 May 2015 16:14 |
Iowa Boy
Messages: 767 Registered: June 2014
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Hey guys I need some advice on a 250 that has all the effects on it for guitar. The fuzz effect does not work and channel 2 is totally dead. The guy is asking $200 for it and does not have the foot pedal. I was wondering if this is something worth maybe buying and repairing or should I just walk away from it? Was thinking maybe it might be something as simple as the Molex plug with a bad connection. Any thoughts?
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Re: K-250 amp [message #22956 is a reply to message #22955] |
Fri, 22 May 2015 16:45 |
chicagobill
Messages: 2005 Registered: April 2003
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Senior Member |
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If it has fuzz, then it's probably a K250-4. The fuzz only works on the 2nd channel, so if channel 2 is dead, the fuzz is dead as well.
It probably is just a dirty connector. Worse case a bad chip.
What color and what condition is the T&R?
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Re: K-250 amp [message #22957 is a reply to message #22956] |
Fri, 22 May 2015 22:53 |
Iowa Boy
Messages: 767 Registered: June 2014
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Senior Member |
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It's blue and in fair condition. How hard would it be to build a footswitch for this since I have never seen one the market in the past year?
Thought if I got it that there is also a 4 X 12 cabinet in the area as well in blue and maybe eventually I could pick up another somewhere. Would make a nice guitar setup for someone and wouldn't break the bank.
[Updated on: Fri, 22 May 2015 23:00] Report message to a moderator
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Re: K-250 amp [message #22961 is a reply to message #22955] |
Sat, 23 May 2015 10:53 |
Iowa Boy
Messages: 767 Registered: June 2014
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Senior Member |
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I thought the 335 lamps were 28 volts......but your saying its 12 volts to the footswitch? Why not just use 12 volt LED light then? Keeping things original isn't me you already know that. I'm for functional and improvements.
[Updated on: Sat, 23 May 2015 10:56] Report message to a moderator
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Re: K-250 amp [message #22962 is a reply to message #22955] |
Sat, 23 May 2015 11:08 |
chicagobill
Messages: 2005 Registered: April 2003
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Senior Member |
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The 335 lamps are 28 volts, and that's what the original footswitches used. If you want to use leds go ahead. Pleat was just telling you what the original design used.
The original switches were large cast aluminum things, that were about the size of a modern multi-effect box. Maybe 18-20 inches wide. Each section had a hinged activator panel, kinda like a Boss pedal, that pushed the actual mechanical switch underneath it. Above the actuator panel was a backlit name panel that would light up when the effect was turned on. If you search the web, you will probably find a photo somewhere that will make it easier to understand.
Additionally there was a wah pedal that plugged in to control the Selective Boost circuit.
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Re: K-250 amp [message #22964 is a reply to message #22955] |
Sun, 24 May 2015 00:47 |
chicagobill
Messages: 2005 Registered: April 2003
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Senior Member |
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They come up on eBay every now and then. I think last year there was one 4 switch unit and a couple of 2 switch units.
Because they are so unusual they get pretty pricey.
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Re: K-250 amp [message #22965 is a reply to message #22955] |
Sun, 24 May 2015 06:10 |
stevem
Messages: 4763 Registered: June 2004 Location: NY
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Senior Member |
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If you choose to built it with LEDs you need to use a current limit resistor in series so that it does not burn out!
Go on line and do a search for the details and how to do the simple math.
[Updated on: Sun, 24 May 2015 06:16] Report message to a moderator
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Re: K-250 amp [message #22967 is a reply to message #22966] |
Sun, 24 May 2015 13:49 |
chicagobill
Messages: 2005 Registered: April 2003
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Senior Member |
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If you search on the board here, there was a guy that was making wah pedals from volume pedals. You can make your own, you just need a pedal with the correct pot and a three wire stereo 1/4" cable.
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