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Old 09-15-2018, 04:18 PM
EdKozk2 EdKozk2 is offline
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6RP22 tube

Hi,
Is anyone familiar with the 9 pin miniature 6RP22 vacuum tube? I couldn't find any specs for this tube, online. The ones I have were manufactured in Japan for Sylvania/ GTE. Were they used in Sears sets ?
Ed
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Old 09-15-2018, 05:04 PM
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jr_tech jr_tech is offline
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Not much, but this is the only pinout that I have found for this miniature power pentode.

http://www.hp1.server-shared.com/hp1/newpage182.html

jr
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Old 09-15-2018, 06:31 PM
EdKozk2 EdKozk2 is offline
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Quote:
Originally Posted by jr_tech View Post
Not much, but this is the only pinout that I have found for this miniature power pentode.

http://www.hp1.server-shared.com/hp1/newpage182.html

jr
Thank you jr,
That's just what I was looking for.
Last week an ARF member gave me a Motorola 17K1BA set. As my son and I were about to load up the set he asked me if I would take some old tv tubes he no longer needed. I thought it was a small box of series string tubes. It ended up being probably over 500 NOS tubes in over 6 boxes. Mainly 60's and 70's types.
Ed
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Old 09-15-2018, 07:42 PM
WISCOJIM WISCOJIM is offline
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Talking

And here I was expecting it to be a tiny color CRT with the P22 phosphor.

.
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Old 09-15-2018, 08:12 PM
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Notimetolooz Notimetolooz is offline
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Quote:
Originally Posted by WISCOJIM View Post
And here I was expecting it to be a tiny color CRT with the P22 phosphor.

.
Me too. I wondered how they would pull that off with just 9 pins!
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Old 09-15-2018, 08:36 PM
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N2IXK N2IXK is offline
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Properly called a 6R-P22, this is one of the Japanese "JIS" types that was used by Sears/Silvertone and others in the 1960s.

It doesn't have a direct EIA equivalent that I am aware of, as some of the JIS types do.
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Old 09-18-2018, 10:59 AM
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zeno zeno is offline
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Correct !
They were used in the very first Jap sets. Soon they went to normal numbers
& used mostly common US designed tubes.
https://www.radiomuseum.org/tubes/tube_6r-p22.html

73 Zeno
LFOD !

Quote:
Originally Posted by N2IXK View Post
Properly called a 6R-P22, this is one of the Japanese "JIS" types that was used by Sears/Silvertone and others in the 1960s.

It doesn't have a direct EIA equivalent that I am aware of, as some of the JIS types do.
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Old 09-18-2018, 07:20 PM
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Robert Grant Robert Grant is offline
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About 15 years ago, I was at an old radio meet or a hamfest, and someone who sells tubes had loads of these tubes, Sears branded (or they may have been 6R-SP22). The dealer had no idea what they were for.
I looked at the tubes closely, noting the shapes and spacing of the grids, and told him I thought the tube might be similar to the 6CL6 (broadband power pentode), but by no means necessarily the same base as a 6CL6.
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