super reverb earth issue

[clock10]

Hi, I have been working on this 73 super reverb, blackface mod, cap job. Had some issues with reverb that I fixed (thanks for the help everyone).
The last problem I have on an otherwise working amp is an earth issue. I get a clicking noise when touching the strings with one hand and it goes with both hands touching. Same if I touch any metal on the guitar or amp.
I am using a Sunpower step down transformer. I have checked cables and plugs for intact earth connection. I havent tried a new power cable from the amp, but did connect a seperate earth wire and touched chassis to see if that stopped it but it didnt.
Any other ideas? Are step down transformers to blame?
Any help appreciated.
Cheers

[Jazz P Bass]

I have seen that clicking on soooo many amps!
Most of the time it is simply your body discharging into the amp.
Gets worse when the relative humidity is low.

[clock10]

Thanks for the reply jazz P bass.
I tried a/b ing with another amp and there was no clicking so I think it must be somrthing to do with this amp. This is the only amp I need a step down tranny for so I cant a/b that with another amp, so I cant be sure.

[MWJB]

It's not the step down tranny

[clock10]

Hi MWJB, any ideas what it could be?

[txstrat]

Just a hunch; do you wear a quartz watch? Maybe the clicking comes from that (the SR might be more sensitive to this).

[Jazz P Bass]

What is the amp that did not do the ticking?
Tube amps are worse than solid state amps.
I have a Peavey solid state bandit on the bench & it ticks.
Relative humidity (heater is running) is 52%.
Want to prove it is your body downloading a charge to the amp.
Get an ESD wrist strap & attach it to the guitar bridge.
No more ticking.