Very wise! I think there might be an element of liability about any electrical equipment in terms of interference it produces or being a potential fire hazard. aka Legendary Collectibles :) Yes!

Don't get into electric guitars then, those 12AX7 prices - damn!

I don't know, Tokyo guys are on a whole other level: https://www.wsj.com/articles/a-gift-for-music-lovers-who-have-it-all-a-personal-utility-pole-1471189463

Thank you for taking a moment to list all of them. Yes, I have been buying some from Hifi Collective. Unfortunately, all of these places are capitalising on the dwindling supply to various degrees of greediness. No hate, though! It's a fair game and I would do the same. There was a time...

Is there a good source for them? Mouser doesn't stock many values.

Interesting, thank you - not super-cheap but affordable.

@L0rdGwyn another noob question if you don't mind: when ordering PCBs are you forced to buy a small (e.g. 50) batch or do you have a way of getting just a few?

@bcowen @Paladin79 any advice on "healing" microphonic tubes, if that's even possible (without lab equipment)? Considering getting some of those silicon rings.

I would say they uglier something looks the likelier that it was made for the military :).

Transformer-like low hum - could be EMI, could be microphonics, could be a ground loop.

I clearly said "EMI" not "RFI".

Could not find any cheap double-EMI-shielded cables. Plenty of double-shielded with the useless foil.

I did not request anything specific in terms of vol pot to be honest. I had a look at one of gut photos and it says "ALPS JAPAN 049G 10KA x 2". I guess "10KA x 2" means it's a stereo 10kOhm with an audio taper, and perhaps "049G" is some manufacturing date code as I could not google it. Not sure...

It could be some form of a single-jack stereo-input, maybe a coaxial input for an internal DAC?

I have received a new amp about a week ago - latest Eufonika model named H5DS (H5 Dual-Selectable). It's a customised/new version of the well-known H5 with the following distinctive features: 1) Driver tube: 6V/12V heater voltage selection. 2) Driver tube: automatic bias/support of different...