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My friend John D. and I both built '64 Deluxe Reverbs.
I isolated the input jacks and ran a bus wire located between the board and pots the length of the board and connected it at the normal transformer lug grounding point close to the bias pot. All grounds of the preamp section and controls were connected individually with a short length of wire to that bus wire. The main filter caps had a wire connected to the same lug on the transformer as the PT HV center tap near the output tubes. The reverb and vibrato jacks were isolated from the chassis and grounded to the bus near where their circuitry was located. The power tubes and speaker jacks were grounded as Leo did it.
John used the brass plate and followed Leo's grounding scheme to the letter.
My amp is dead quiet. John's amp hums. I liked the amp so much I built a Vibroverb clone using the same grounding. It doesn't hum.
I isolated the input jacks and ran a bus wire located between the board and pots the length of the board and connected it at the normal transformer lug grounding point close to the bias pot. All grounds of the preamp section and controls were connected individually with a short length of wire to that bus wire. The main filter caps had a wire connected to the same lug on the transformer as the PT HV center tap near the output tubes. The reverb and vibrato jacks were isolated from the chassis and grounded to the bus near where their circuitry was located. The power tubes and speaker jacks were grounded as Leo did it.
John used the brass plate and followed Leo's grounding scheme to the letter.
My amp is dead quiet. John's amp hums. I liked the amp so much I built a Vibroverb clone using the same grounding. It doesn't hum.
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