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Test Equipment Anonymous (TEA) group therapy thread
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bd139:

--- Quote from: factory on July 21, 2022, 07:33:35 pm ---
--- Quote from: bd139 on July 21, 2022, 03:39:16 pm ---34401A. £250. https://www.ebay.co.uk/itm/374184377229

Would buy it but I’ve already got a really nice one

--- End quote ---

Oops, might have accidentality hit the buy button.  ;)

David

--- End quote ---

Congratulations - welcome to 34401A club  :-DD
factory:
I assume you need at least two to qualify then.  :-DD

David
mansaxel:

--- Quote from: 25 CPS on July 21, 2022, 07:34:16 pm ---
I was wondering about the heat recently with how the deep level tube lines can be incredibly nasty during the summer.  I can't imagine how bad they are now with the heatwave.  The one upshot with the Central Line is the 92 stock has solid state propulsion.  Bakerloo and Piccadilly have to be even nastier with the 72 and 73 stock's resistive controllers throwing heat off every time a train starts and stops.

--- End quote ---

In Stockholm the Tunnelbana is pretty decent, and better so for the deep lines. They're in bedrock, and all trains have PWM control now, so even in summer it's quite nice. Can't beat old fortifications though; Maginot line ouvrages Fermont and Michelsberg were a comfortable 12° C all through, what with being 30m underground and sparsely visited. Those ouvrages that like Michelsberg have a walking entrance (Entrée des Munitions de plain-pied) where one walks straight into the main level of the fort, always have a tropical section in the entrance during summer, where cold air from below condenses the humidity in the hot air outside. Very wet, that. Once past, it gets nice and chilly.

Of course: As soon as you start running those places in something approaching actual foreseen use, with some 500 people in, the Usine running for power, and so on, they do tend to get a bit stuffy, and forced ventilation is required.

This is true of all such places; even more so in the new ones if there's a working NBC protection with sealed doors and so on...
bd139:

--- Quote from: factory on July 21, 2022, 07:54:32 pm ---I assume you need at least two to qualify then.  :-DD

David

--- End quote ---

 :-DD

Robert763:
Had a bit more of a play with the Keithley 199 53/4 digit (302000 count) DMM  :-DMM I bought from Scottrade12 on ebay.
It is all working and I really like it. Low noise even without filtering, fast readings and a really nice red LED display (16 segment). I'll get a decent camera and some daylight on it tomorrow and try to get pictures that do it justice.
I think it's my new favorite bench DMM. It's going to displace the Solartron on the bench for sure. Anyone want a 7150?
Paid £110 for the 199 which (for me) is a lot for a 51/2 digit class bench meter but I'm glad I made the offer.
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