Gibson GA40RVT

This amp uses a DC supply for the heaters.  The bridge rectifier in the heater supply was getting too hot and desoldering itself after the amp warmed up.  I replaced it with a huge 25A rectifier which should stay much cooler.

The amp was biased WAY too hot - way beyond the maximum dissipation rating of the output tubes.  Both 6L6s were redplating.  I increased the value of the cathode resistor and the amp sounds much better now.

I replaced many of the cheap components in the amp and slightly tweaked the circuit for better tone.  I also replaced a few of the bulging reservoir caps and threw in some old stock preamp tubes which improved the tone over the original Sovtek WCs.  

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