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Musical Instrument Repair Community

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Missing resistor consequences

Hi, I recently got a soldano hot rod in a trade (what a score) buuuuuuut when I met up with the dusty ol fellow in a 7-11 carpark he mentioned that it sounded like a screw was loose and rolling around in the chassis, so I got her home popped her open and to my dismay it was a resistor (placed in series right before one of the power tubes) that has fallen off the PCB, I’m handy with the soldering iron so I’ve got no bones about attaching it back on, but I’m worried about potential damage in the rest of the circuit, I’ve got no idea how long this has been an issue for or how the amp even survived on 1 power tube

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Shy Swartz
Shy Swartz
6 days ago

Wow! that is crazy! sorry to hear about your situation! what i would recommend is purchasing and installing a new resistor then testing the amp. if you dont experience any issues with the amp then i would roll with it. If you do experience any issues definitely send a update and ill help you troubleshoot further. Below i have linked the exact resistor you need just make sure you select 470! Hope this helps! https://www.tubedepot.com/products/2-watt-metal-oxide-power-resistor

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