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Old 7th Aug 2020, 8:55 pm   #1
beamcurrent
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Default Emiscope 3" CRT

As part of a recent donation of equipment to the Broadcast Television Technology Trust registered charity number 1179333 was this rather nice EMI CRT.

It has the part number MX2 and dated May 1952.

It's origin may have been the BBC and I did suspect that it is the waveform monitor tube from this EMI CCU however the protruding Y plate connections rule this out? Maybe it fitted on of the early EMI oscilloscope?

http://www.bttt.org.uk
http://www.mcr21.org.uk
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Old 8th Aug 2020, 8:48 pm   #2
WME_bill
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Default Re: Emiscope 3" CRT

EMI CRT type MX2
I attach a data sheet for all EMI Cathode Ray tubes circa 1955. Your MX2 is there, apparently intended for oscilloscope use. Particularly with the side connections to the Y deflector plates. It was CV418. Later they produced a almost identical MX17 / CV2222, for which I have the base connections.
The slightly longer type 4/1 was used in a oscilloscope design in Wireless World by S A Knight, December 1948.
Later EMI rather lost their way. In 1965, they produced only a few types, it looks rather as second source manufacturers for Brimar and Mullard for MoD contracts, listing only four instrument tubes, but a number of radar and industrial scanner tubes.
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