Melos SHA-gold photentiometer replacement DIY

I do want to do the all the mods I'm planning myself...
Upgrade the attenuator, caps, resistors, tube sockets and power supply

If you're 'rather clueless' and do not own a DMM, I am not sure you should be performing these mods yourself...you could do your amp, or worse, yourself, quite a bit of damage.
Just sayin'...
byron

Agree with Manistory.

You need to test with DMM to check a correctess of your DIY otherwise if you just turn it on, you'll have a large possibility to burn something in the circuit board especially with tube equipment. Also it's good to know what is Votage V, Current I, Resistance R, Impedance Z, Reactance X, Inductance L, Capacitance C, Freequency W, Power P, Measurements units of above listed.

Start with cheap equipment first to practice soldering, measurements (I to actually feel that you're not ready to DIY mod your preamp and practicing on cheap equipment will actually give you a cursory look to estimate yourself) etc and than exersize your DIY when you feel ready to take a risk.

Also having a camera to picture 'before' scenario would be very helpful in any tech DIY projects. I use Nikon D3000/Nikkor 18 - 55mm lens.

Disclosure: I'm part-time studio tech/full time software engineer.

Have you talked to Chris Johnson at partsconnexion.com?
try info@partsconnexion.com and he will get back to you.
If anyone would know, he would.

The volume pot in that Melos SHA may be special ... it is light coupled or a LDR ... notice the "phot" in Photeniometer meaning light

Some feel that these light coupled volume controls are better sounding than resister based controls and most likely why Melos chose to use them

You may want to do some homework about the Melos SHA before swapping for a basic Volume control

If you are trying to upgrade with ....

.."right one of these"..

... you may end up taking a step backwards

If you are having a problem with the volume control ... you may want to Google for help