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Post subject: Twin Reverb 65 reissue vibrato wont turn off
Posted: Tue May 19, 2009 10:39 am
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I am working on a RI Twin Reverb and the vibrato will not turn off. The swith works, everything seems in tolerance, when you hit the switch it fades out then back in. I even used a dmmy plug to switch it and still its there.


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Post subject: Re: Twin Reverb 65 reissue vibrato wont turn off
Posted: Thu May 21, 2009 10:01 pm
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amptech@live wrote:
I am working on a RI Twin Reverb and the vibrato will not turn off. The swith works, everything seems in tolerance, when you hit the switch it fades out then back in. I even used a dmmy plug to switch it and still its there.


kick it...lol.
how long have you had it?
may want to call customer service


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Post subject:
Posted: Sat May 23, 2009 7:35 pm
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The tremolo works by fluctuating the bias voltage. Pressing the footswitch should ground out the circuit and cause the bias to be stable. Meter the bias and see if it is fluctuating.


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Post subject:
Posted: Thu May 28, 2009 7:05 am
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rjake wrote:
The tremolo works by fluctuating the bias voltage. Pressing the footswitch should ground out the circuit and cause the bias to be stable. Meter the bias and see if it is fluctuating.


Agreed. If there is no fluctuation then something is wrong. Sounds like the it isn't grounding.


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