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Post subject: Hotrod Deville 410 iii tube V1 issue
Posted: Tue May 07, 2019 6:36 pm
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Joined: Tue May 07, 2019 6:22 pm
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I recently noticed when I tapped on preamp tube V1 (far right looking from back side) it sounded microphone. I bought all new tubes and renowned the amp as tunes were old anyways. No matter which tube I put in the V1 spot it still sounds microphone. But not in any other spot. Any thoughts?

This all started because the amp was starting to hiss loudly and had some feedback issues over the past few months. I’m hoping this fixes the hissing issue (channel 2).


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Post subject: Re: Hotrod Deville 410 iii tube V1 issue
Posted: Tue May 14, 2019 1:32 am
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Joined: Fri Feb 05, 2010 4:31 am
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Location: Province de Québec, Canada
A tube in V 1 is always microphonic and it is not a issue.
It is the first tubes on a preamp/ map chain and the slightest noise is very amplified.

Hiss an feed back ; one or some 12AX7 or 6L6 may have a issue


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