What a neat piece of history! Never seen one before so can't add any info.
Pity about the broken CRT - is it replaceable? Also, I love the words "time
base" on the label - takes me back to those days of yesteryear!

BTW, the VR91/EF50 is an RF pentode - I once had an old TRF, one channel TV
(Pye 19T) that used several of them in the RF strip. One of my first
"serious" tube(valve) proejcts was to build an ITV converter from scrap WW2
parts to convert circa 180 MHz ITV to the circa 42.5 MHz (vision) and 41.5
MHz (sound) antenna input of the Pye 19T (I forget the actual frequencies.)
Cheers,
Roger

"N_Cook" wrote in message
...

VR91 would seem a pentode
http://www.radiomuseum.org/tubes/tube_vr91.html

CRTm some info
www.radiomuseum.org/tubes/tube_vcr522.html


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Diverse Devices, Southampton, England
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