Hoffman Amplifiers Tube Amplifier Forum
Other Stuff => Effects => Topic started by: Joe6v6 on November 19, 2009, 01:03:33 pm
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I have an old (late 70's ?) Morley - Tel Ray electronics Power Wah Fuzz that has issues. The Wah alone works fine & has a very nice tone. The fuzz byitself dosnt work well, It works but cuts out & mutes for a second then comes back, if I turn the guitar vol way down it does not cut in & out. The Wah and fuzz together seem to work ok but the fuzz is not as pronounced as it is by itself. I am attaching a link to the schematic and a picture of the insides, I am wondering if I shoud start by replacing the electrolitic caps in the power section, I dont want to just throw parts at it but I know these caps go bad in time, everything seems original except one of the pots. Thanks for any help - JOE
Schematic - http://www.schematicheaven.com/effects/telray_wahfuzz_pwf.pdf
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I don't know if you ever did anything with this pedal but...
I'd replace all the e-lytics on general principle, but especially the 1uF ones. A couple are used as coupling caps and another is a bypass cap, and if any of these are leaking they'll throw off transistor bias and could result in horrible clipping like you're describing. I also wonder about the trimpot, which I don't really see on the schematic. I'd bet it's a bias trimmer for one of the transistors. I know from mucking the bias on one of my Fulltone fuzzes that you can change the character of the fuzz a lot with that (in good and bad ways).
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Thanks for the reply Blue, I havent worked on it yet but I am going to start by replacing all the electros & go from there. I think the trim pot is the one that says wah output ( 400k ) on the schematic. .. Joe
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I had assumed the fuzz intensity and wah output were the controls on the side, and of course the tone control is the wah pedal itself.