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Also, how much is a valve likely to cost?
Thanks
I can't find any inside shots of the VT40+, but if it's more like the VT30 it will be easy...
A valve is about £10, so if you fancy having a go it's worth a try.
http://www.karltone.co.uk/ecc83-12ax7-53-c.asp
Sovteks (especially the WB) tend to be darker-sounding than some of the others so I would probably start there.
"Take these three items, some WD-40, a vise grip, and a roll of duct tape. Any man worth his salt can fix almost any problem with this stuff alone." - Walt Kowalski
"Only two things are infinite - the universe, and human stupidity. And I'm not sure about the universe." - Albert Einstein
Edit - just watched the video properly! So ignore the question.
The only things I would add are that the back panel is easier to get off and put back if you loosen the side chassis bolts slightly first, and tighten them last.
And that I don’t know what the sock thing is all about .
"Take these three items, some WD-40, a vise grip, and a roll of duct tape. Any man worth his salt can fix almost any problem with this stuff alone." - Walt Kowalski
"Only two things are infinite - the universe, and human stupidity. And I'm not sure about the universe." - Albert Einstein
I've opened it up - slightly different to the video, but the board with the valve comes away and out quite easily. I sprayed a little contact cleaner on the speaker connectors for good measure and made sure all the other connectors were seated in firmly.
Anyway, the valve inside is labelled 'Ruby 12AX7AC5' in red on the tube. I don't recall seeing any leds near the valve so I'm sure any glow is from the valve.
Not sure if this valve is original or if I should just try another valve entirely - and if I'd notice the difference. Any pointers gratefully received. They had an Electro Harmonix one on the site linked to earlier and quite a choice of others.
At least, this is how they perform in standard high-voltage valve amp circuits. Whether that's true at the much lower voltages here - even if the filament is running at the normal voltage - I don't know.
"Take these three items, some WD-40, a vise grip, and a roll of duct tape. Any man worth his salt can fix almost any problem with this stuff alone." - Walt Kowalski
"Only two things are infinite - the universe, and human stupidity. And I'm not sure about the universe." - Albert Einstein
https://www.youtube.com/watch?v=zQsKa7dYu2w