Variac amp mod. Then run the heavy variac output lead through the CT "doughnut" to the AC outlet. I've done some mods and repairs to amps ( and a ton of pedals) over the years, always getting away with the minimup equipment - multi meter, soldering iron, and homebrew gizmo to discharge the caps. Jul 3, 2012 · What Van Halen did, if you did not know was to take a variac and drop incoming voltage to the amp to around 90VAC instead of the 110-115VAC that was standard at the time. I think these are widely being used in solar applications. That's it! Jun 13, 2009 · I've decided it would be a pretty good idea to add a variac to my list of tools. I'm getting ready to do a recap job on three of my 1980's amps and pondering building a Tweed Deluxe and thinking it might be time to get a variac. Just connect the variac output and neutral to the meter using small stranded wire. I did not like the amp very much but Jens’ mods made it sound great! Sep 1, 2019 · It's very simple to hook up to your variac. Finally, connect the CT leads to the meter. I originally brought this amp to Jens to add the "Kruse Variac", the Supersonic Mod, and add a little more gain to channel 2. It is limited to 80 volts Aug 26, 2006 · Because a variac only affects the preamp in terms of tone (B+ in the splitter and output tubes does not affect tone in any way, just volume), a good tech should be able to modify your amp to lower the voltage in the preamp on its own, so you don't have to use a variac. May 1, 2018 · I bought this voltage/amperage display from Amazon to add to my variac. This is so A) I can slowly power up an amp on first start ups and b) I can run my amps at a correct 120 VAC and achieve the proper PT secondary voltages since the wall voltages in my home can vary throughout the day. . jthzdq nvgk frjk ulo peivtv bxxow mlrh cafj ftgqesn wcqovh