Hi,

finished my second projected: the TT Tube Reverb with the upgrade PCB.
Assembly was straight forward, I get all the measurements to spot on.
The sound is great! I drive it before a 3W G3 MadAmp, which is a quite clean amp.

To be 100% happy I am asking for some advice to reduce the rest of hum and noise I have:


If the mix is all the way on bypass there is only a bit of noise added to the dry signal, not sure if it should be super clean.
If I mix in reverb signal I get a bit of both signal noise and a fixed 50hz-ish noise too.
It is not hearable on small mix settings, but if the mix is quite large it is quite obvious.
The noise gets affected by the tone setting a lot.

Attached are a few pictures of my assembly. Hopefully, I just forgot something super obvious, or I made a stupid mistake somewhere (I am quite new to this).

Thanks for your feedback

D

Hey,

You can try to rewire  the heatersupply. I am not sure if that is leading to your issue but your heater wiring is not considered to be optimal by a lot of people.
Read this and follow the instructions at the end: http://www.valvewizard.co.uk/heater.html

As well I would rewire the pots. Make shorter leads and do not twist them.

Cheers,
Simon

Hi,

looking at the last picture one might assume that the reverb tank is picking up some noise. Have you tried relocating it away from the power supply and/or transformer?

Good luck!
Sebastian