Products > Test Equipment

Do you have any test equipment in your lab that uses vacuum tubes?

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mmagin:

--- Quote from: Michael Lloyd on September 15, 2019, 08:56:39 pm ---Technically this isn't usable because it's not restored yet. I don't have a model number or schematic but I haven't looked very hard for it either



--- End quote ---

That is the military, possibly second-source (non-HP) version of the HP 410b. 

Martin.M:
VTVM:

Sennheiser RV55 is a AC mVM
Grundig RV3 is a VTVM with a warm probe for HF

RV55 is a wonder about the s/n what it have in the < 1mV range, made with tubes. Here we find the experience of microphones technology (under-heated triode system)

amazing: Sennheiser is a sponsor company at the Makerfaire Hannover, there is a friendship bec. I run there always any glowing history of them..
This year I got a very lot of technical manuals from them, this books are now avaiable for all who do restorations. Also they have given me a RV54 made by LABOR W (Laboratories Wennebostel, that is the rather old name of them ! )





 :)

ferdieCX:

--- Quote from: Martin.M on September 21, 2019, 05:07:45 am ---VTVM:

Sennheiser RV55 is a AC mVM

(Attachment Link)


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The BNC T in the picture looks like the ones that came with the VAXstations.
Is that correct ?  :)

Martin.M:
I really don`t know that. Have saved the life from an old SGI, it was not possible to put it here in the room.
It may be enough, no VAX here

Martin

Martin.M:
lo-Ohm-Meter, 4wires testing. Full glowing  :)

< 1/3/10/30/100/300 Ohms full scale. This Oldie can test ESR at 10kHz sine also.
It is possible this is the last one, it was made for internal use in the own manufacturings, by Philips NL.
Picture: testing a 10 ohm







 :)

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