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Old 16th Aug 2022, 10:25 pm   #39
Kyri
Tetrode
 
Join Date: Mar 2021
Location: Lancashire, UK.
Posts: 57
Default Re: Fender Vibro Champ Amp

I use a variable transformer with a cheap digital volt/ammeter added to it, calibrated to make sure it is reading right. That allows me to put the correct voltage into my hifi amp which is designed for 117V and since my household voltage is nearer 250V then this transformer with measurement has been very useful. I can even adjust it over time as I notice variation in the input voltage.
I happen to have a vibro champ (late 70's, must dig it out and check exactly!) and some other amps and never considered this issue (and so far didn't measure valve voltages). From now on I will use the variable transformer on them all to ensure I am not cooking all my old gear, and may take the time to measure some voltages too. A very informative thread thanks everyone!
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