SEAVERB outboard reverb tank thread

[MikeC]

I'll send you some info a little later today.

[StrummersOfThunder]

You need an "isolated ground" - the chassis ground is isolated from earth but still sufficiently connected for electric shock safety. Its fairly simple but very clever. I initially had the hummmm problem (earth loop) on the Fender 6G15 Reverb unit that I built but eliminated it by implementing the isolated ground scheme. The modern re-issue Fender 6G15 has it built in.

I have this built per Merlin’s page (I think )

[robthemac]

You need an "isolated ground" - the chassis ground is isolated from earth but still sufficiently connected for electric shock safety. Its fairly simple but very clever. I initially had the hummmm problem (earth loop) on the Fender 6G15 Reverb unit that I built but eliminated it by implementing the isolated ground scheme. The modern re-issue Fender 6G15 has it built in.

I have this built per Merlin’s page (I think )

Who needs safety when you have drip

[StrummersOfThunder]

I'll send you some info a little later today.

I’ve isolated all the jacks and I built a floating ground with a big 5w resistor, a cap and two anti parallel diodes on a strip of eyelet board. Then I have the star grounding style with a common return to the floating ground point

[MikeC]

I'll send you some info a little later today.

I’ve isolated all the jacks and I built a floating ground with a big 5w resistor, a cap and two anti parallel diodes on a strip of eyelet board. Then I have the star grounding style with a common return to the floating ground point

Sounds like you've already done it. I've PM'd you anyway.

[StrummersOfThunder]

I'll send you some info a little later today.

I’ve isolated all the jacks and I built a floating ground with a big 5w resistor, a cap and two anti parallel diodes on a strip of eyelet board. Then I have the star grounding style with a common return to the floating ground point

Sounds like you've already done it. I've PM'd you anyway.

Yes , about 8 years ago

[MikeC]

You need an "isolated ground" - the chassis ground is isolated from earth but still sufficiently connected for electric shock safety. Its fairly simple but very clever. I initially had the hummmm problem (earth loop) on the Fender 6G15 Reverb unit that I built but eliminated it by implementing the isolated ground scheme.

Can you explain this sorcery Mike?? Sounds wild!

Hey JB, I mis-read YOUR post thinking it was strummers asking. It's too hard to "explain" in a post, want me to send you the info?

[MikeC]

You need an "isolated ground" - the chassis ground is isolated from earth but still sufficiently connected for electric shock safety. Its fairly simple but very clever. I initially had the hummmm problem (earth loop) on the Fender 6G15 Reverb unit that I built but eliminated it by implementing the isolated ground scheme. The modern re-issue Fender 6G15 has it built in.

I have this built per Merlin’s page (I think )

Who needs safety when you have drip

Lucky for you, a certain guy that builds amps for people is very safety conscious
(See what I did there with the "shocked" emoji)

[jeremyb]

You need an "isolated ground" - the chassis ground is isolated from earth but still sufficiently connected for electric shock safety. Its fairly simple but very clever. I initially had the hummmm problem (earth loop) on the Fender 6G15 Reverb unit that I built but eliminated it by implementing the isolated ground scheme.

Can you explain this sorcery Mike?? Sounds wild!

Hey JB, I mis-read YOUR post thinking it was strummers asking. It's too hard to "explain" in a post, want me to send you the info?

HA! All good, it sounds like Strummers has explained it above but thank you for the offer!

[MikeC]

I’ve isolated all the jacks and I built a floating ground with a big 5w resistor, a cap and two anti parallel diodes on a strip of eyelet board. Then I have the star grounding style with a common return to the floating ground point

Sounds like you've already done it. I've PM'd you anyway.

Yes , about 8 years ago

Wow, time has really slowed down since 2021

[StrummersOfThunder]

Sounds like you've already done it. I've PM'd you anyway.

Yes , about 8 years ago

Wow, time has really slowed down since 2021

Maybe 7 years
I made my original one in 2016 I think

[StrummersOfThunder]

Closing in on having all the parts now ….
I pilfered a few 22mf caps a while back so I’m short 3

The filter cap schematic calls for 1 x 47mf and 2x 22mf

I actually have three fairly essentially new 47mf on an old board I never used . Any reason I can beef up the filter cap battery on the reverb tank ? I.e could I sub in a 47 for a 22? I’m aware on guitar amps this can have an effect on tone in terms of tightening up bass response. Any issues here ?

[MikeC]

Can you post the schematic you are referring to?

[StrummersOfThunder]

Can you post the schematic you are referring to?

Actually good question
It’s based on the schematic I translated from the tank I built years ago ….but it sounds incredible so I’m replicating it. That’s why I’m a bit worried about straying from that

[StrummersOfThunder]

But that aside, in essence, should it matter ?