How to repair enhance gain performance Fender Silver Face Vibro Champ tub guitar amp easy mod

Another great Fender amp comes across the bench at D-lab Electronics. This one is in perfect condition, no mods. Has been in a closet for over 40 years. The owner made the choice to send it to me for evaluation. Needed the typical cap job. Made a minor gain adjustment, and bam! Fender Chime was reborn! What a great sounding Class A amp. I really love the engineering that Fender did back in the day. What a great time in life! Wish I was there.