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#1
09-14-2016, 01:52 PM
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3RP4 crt?
Does anyone know what this tube would have been used in? Got one today and have never seen one. Similar in build and specs to a 3KP4 but one more pin with the connections shifted slightly.
__________________
“Once you eliminate the impossible...whatever remains, no matter how improbable, must be the truth." Sherlock Holmes. 
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#2
09-14-2016, 01:56 PM
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Apparently used in a portable video camera in 1956.
I never knew they had any cameras that small back then, some of the cameras used with early home video were just as big. https://www.facebook.com/18935974776...20477584656461
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#3
09-18-2016, 01:35 AM
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A little search after Kutztown on the internet shows this bulb to be almost identical to the 3KP4 in specs. More than passable for a 3KP4 sub. Just a wiring change from 11 pin to 12 pin. Now to decide how to do it. Adaptor...but where do I find an 11 pin male to wire to a 12 pin female. It should fit in the space. Or do I snip and just go 12 pin?
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“Once you eliminate the impossible...whatever remains, no matter how improbable, must be the truth." Sherlock Holmes. Last edited by Dave A; 09-18-2016 at 02:01 AM. Reason: text
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#4
09-18-2016, 10:11 PM
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Apparently, there is enough space for an adaptor... this restorer made it work for a 3RP1 :
http://www.electronixandmore.com/res...lot/index.html jr
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#5
10-12-2016, 09:29 PM
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Wow, I have a couple of 3RP1s squirreled away 'just in case' but I've never come across a P4. Nice find.
-- Dave Sica
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#6
10-13-2016, 07:05 AM
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Quote:
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Linear Mode
