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Old 20th May 2021, 9:57 pm   #24
AdrianH
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Join Date: Mar 2020
Location: Blackburn with Darwen, Lancashire, UK.
Posts: 889
Default Re: Help with some old TV tubes.

Found some basic data and a picture from this site, so i have just taken a better pic of the gun on my tube
and have it with a picture from a Duke Nuken post about a duff AW36-21 and they do look very similar to each other, some differences which could just be down to year of manufacture.

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This is a new picture of the 17" tube, with the light coming in from the side i noticed some white shading where I would expect the getters to be, hence thinking it could be going to air.
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It is being fed with 6.3 Volts for the heaters and have 300V via a 300K resistor between g1 and Cathode to give a measure of cathode emission, it was very low to start with and is slowly building up with time. I appreciate this may not be an indication of vacuum as that will only be noticed with HT applied and watching for the blue glow, but the best i could do at the moment.

Thanks everyone for assistance it has help me quite a lot.

The tubes need work to the aquadag as a lot is flaking away I have some on order, A fibreglass small brush will be used to clean up the pins and a few bases need re-fixing, but I believe they will be useful in the future.

Adrian
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