Importance of vacuum/pressure testing

[barfer]

How did we go from vacuum testing to vacuum tubes... I'd post a pic of my vacuum tube tester to try steer things back on to testing... but that would be flawed logic, & this is far nicer to look at...
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Bhwahahahaha is that yours? I LOVE it! I see a bunch of 12AX7/AU7 type preamp tubes. Is that power tube an EL34 or a big 6L6? It’s gorgeous.

Nice blackplate halos on those 12AX7’s of AT7’s or whatever they are. I used to be able to ID most of that stuff on sight but it’s been a LONG time since I had loads and loads of tubes… (although I still gots some for sure )

 

[J D]

It's my dads, along with a multitude of other valve based components & half dozen valve amps, driving a bunch of electrostatic speakers - I'm just the muggins that has to keep it all working.
I'd post more pic's but (aside from steering us further off topic) most of it is shamefully dusty