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Re: Tube Data
> Original Poster: "William Parn" <parn-at-fgm-dot-com>
>
>
> Greets,
>
>> -----Original Message-----
>> From: Tesla List [mailto:tesla-at-pupman-dot-com]
>> Sent: Sunday, February 20, 2000 2:56 PM
>> To: tesla-at-pupman-dot-com
>> Subject: Tube Data
>>
>>
>> Original Poster: "Megavolt Nick" <tesla-at-fieldfamily.prontoserve.co.uk>
>>
>> Hi All,
>> today I picked up a massive tube and wondered if anyone
>> had any idea
>> what it is. The only number on the thing is QB 5/1750. I've
>> looked it up on
>> most of the net tube data sites and none of them have heard of
>> it. The glass
>> bulb is about 4" diameter by 5" high with a big heatsunk feed
>> through on the
>> top and 5 rather beefy pins on the bottom. The anode looks like about 1½"
>> diameter.
>> The filament xfmr looks like about 200VA and the leads to the
>> tube were 2mm
>> thick copper.
>> Inside the unit I got it out of there was a 24kV capacitor bank -
>> but I don't
>> know if they were connected while in operation as half the thing
>> was missing.
>>
>> Thanks In Advance
>> Nick Field
>>
>>
>
> I am no expert here, but it sounds like you got yourself a X-Ray
> tube. A friend of mine has an old X-Ray tube and it has the
> big thick 1.5" anode you are speaking of here. I think 24KV is
> enough power for a X-Ray probably a week one but still there.
>
> Cheers, and be careful,
> Bill Parn
>
>
If the anode is angled, the probability increases that it's an xray tube.
The anode is referred to as the target in this case and the angle directs
the bremsstrahlung radiation toward a side port in the casing. If the anode
is not angled, it sounds like it could be a tetrode. The description is very
similar to a couple of Thompson TH 5186's I have. These are used for power
supply switching in CT Scanners and in radio transmission.