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 Post subject: Does Anyone Have Specs For A UX216B?
PostPosted: May Mon 27, 2019 1:23 am 
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Joined: Jun Sun 15, 2014 11:04 pm
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Location: Coos Bay, Oregon
I can't seem to find data on this one. One amplifier calls for two of them, and came with a pair of 81's which apparently are direct replacements. So, I'm wondering why there are not many 216's around and why there is little information on them? Any help appreciated. Cheers, Russie


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 Post subject: Re: Does Anyone Have Specs For A UX216B?
PostPosted: May Mon 27, 2019 1:36 am 
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Joined: Jan Thu 01, 1970 1:00 am
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Location: S. Dartmouth MA 02748-1225 USA
The direct replacement is the 81's. The 216's pass less current and have thoriated filaments. They can be rejuvenated and burn bright. There were just not that may made. The RCA Tom Cat used them but late 'cats used the 81.

http://www.tubecollectors.org/archives/ux216b.pdf

I have a couple around for snicks and giggles but I would not use them.

Chas

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 Post subject: Re: Does Anyone Have Specs For A UX216B?
PostPosted: May Mon 27, 2019 12:45 pm 
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Location: Ontario, Canada
The rare Canadian Rogers Jubilee radio of 1927/28 used two of these as well.
The next year, they went to type 280.

John


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 Post subject: Re: Does Anyone Have Specs For A UX216B?
PostPosted: May Mon 27, 2019 4:05 pm 
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Location: Dayton Ohio
The same thing happened to the UX213 for very much the same reasons. It was replaced by the 80 or UX280.

-Steve

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 Post subject: Re: Does Anyone Have Specs For A UX216B?
PostPosted: May Tue 28, 2019 3:47 pm 
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Joined: Jun Sun 15, 2014 11:04 pm
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Location: Coos Bay, Oregon
Thank you guys very much. Perhaps I should not worry too much about getting a pair of those rectifiers. Cheers, Russie


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 Post subject: Re: Does Anyone Have Specs For A UX216B?
PostPosted: Jun Thu 13, 2019 6:31 am 
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Joined: Jan Thu 01, 1970 1:00 am
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Location: Near Portland, OR
If you're still interested, I dug out my copy of The Collector's Vacuum Tube Handbook, vol. 1, by Robert T. Mullard. Here are the specs for types UV216 and UX216B:

Fil: 7.5 volts; 2.35 amps (UV216), 1.25 amps (UX216B)
Plate: 550 volts, 65 ma

The UV216 was introduced in 1921 and replaced by the UX216B in 1925. They were obsoleted by the UX281 (which had a 700 volt, 85 ma plate) in 1927. The operating characteristics for the '16 and '16B were taken from the tube boxes they came in. The '16B was originally to be numbered UX216A, but that was scrapped to avoid confusion with the Western Electric triode 216A.


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 Post subject: Re: Does Anyone Have Specs For A UX216B?
PostPosted: Jun Thu 13, 2019 2:53 pm 
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Joined: Jun Sun 15, 2014 11:04 pm
Posts: 1043
Location: Coos Bay, Oregon
Thank you very much for that data. It helps on the project I'm on at this time. Cheers, Russie


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