noise from reverb tank in amplifier head

[pula58]

epoxy the spring clips together at the middle and ends it will help make the signal stronger.

I am not sure I understand what you are saying here. Could you describe?

Thanks!

P.

[selloutrr]

By placing a small dab of epoxy on the spring clips it prevents slipping and increases the signal strength transmitted across the springs.

[pula58]

great drawing.
thank you!

[Cygnus X1]

I wouldn't want to service a tank where the springs have been glued on.

Having a similar issue with a 6V6 driven reverb for an Airline head.
Sounds fine when the tank is out, but makes static noises, hiss, and hum when it it is all together.

[pula58]

putting glue at the spring intersections: Is this a suggestion to make up for the fact that I have oriented the tank open-side to the front, instead of open side down?

Or, is it an improvement for reverb tanks in geeneral?

[selloutrr]

Both.

It's a very small tooth pick dab of epoxy or model glue it's not difficult to break apart if you needed to service it for some reason.

You have signal loss in the clips rubbing by making that a solid connection it improves the signal loss by more then 20%.

Since you are inverting the tank it may or may not experience signal loss. If so this will help restore it.

[Cygnus X1]

Note to update.
I had the epoxy all ready to go and I tried another tip.

Dumb me!

Rotated the tank 180 degrees and she's as quiet as can be.

It is an Airline 9136A head, 2x6L6GC version with a 6V6 reverb tube.
Sounds great, like a low powered Twin and has a vari-bias trem as well.

[pula58]

Note to update.
I had the epoxy all ready to go and I tried another tip.

Dumb me!

Rotated the tank 180 degrees and she's as quiet as can be.

It is an Airline 9136A head, 2x6L6GC version with a 6V6 reverb tube.
Sounds great, like a low powered Twin and has a vari-bias trem as well.

do you mean that you turned the tank 180 deg so that its bottom is now facing up? Or, that you rotated it so that was on the left side of the cab is now on the right side?

[Cygnus X1]

do you mean that you turned the tank 180 deg so that its bottom is now facing up? Or, that you rotated it so that was on the left side of the cab is now on the right side?

Left to right.
Apparently the pickup side was catching hum from the power transformer.

[tubelectron]

Well, if you compare the sizes of respectively :
- a bandmaster reverb and non reverb heads,
- a dual showman reverb and non reverb heads,
You will notice that each time the reverb heads are taller than the non-reverb, in order to reduce the induction of the power transformer on the reverb tank, by leaving additional room.

Last week, I serviced an all-genuine RIVERA M-60 head, and even the reverb tank was a smaller 8 series Accutronics, installed as far as possible from the power trafo, shielded undeneath, there was some hum induction on the tank... Factory stock... It's not so unusual !

A+!