Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: Lambertini on February 26, 2024, 05:46:28 pm

Title: Surprising "grounding circuit" on TAD 6G15 clone
Post by: Lambertini on February 26, 2024, 05:46:28 pm

Hey all. Can someone explain me the benefits and the concepts behind this surprising "grounding" circuit inserted between the chassis and all circuit ground points in TAD version of the Fender 6G15 tube reverb?

Title: Re: Surprising "grounding circuit" on TAD 6G15 clone
Post by: PRR on February 26, 2024, 05:49:05 pm

Breaks the ground-loop between reverb and amplifier 3rd-pins. Common in hi-fi. Safe enough and often effective.

Title: Re: Surprising "grounding circuit" on TAD 6G15 clone
Post by: tdvt on February 26, 2024, 06:06:19 pm

Check out section 15.10

https://www.valvewizard.co.uk/Grounding.pdf

I have used it several times, works well.

Title: Re: Surprising "grounding circuit" on TAD 6G15 clone
Post by: HotBluePlates on February 28, 2024, 05:57:44 am

Same issue being discussed about a 6G15 here (https://el34world.com/Forum/index.php?topic=31296.0).