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Old 17th June 2008, 06:59 PM   #1
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Default Compactron Output Tubes

Hey guys,
Have any of you wandered across any compactrons suitable (or equivalent to another) for use as an output tube? I see a few here and there, but there aren't any curves for them. There are also some with fairly decent looking pentodes in them and an associated triode/diode. I wouldn't mind using the pentode only section I suppose.

I would like to stay with 12 or 6 volt heaters, and also the 6T9 is not beefy enough.
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Old 17th June 2008, 09:52 PM   #2
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I picked up a pair of Novar (9pin) compactron sockets at Hamcon.
I have three 6V beam power tubes for that pinout, I hope at least
two are still good. Two of the boxes are marked "low", but
there is no telling for sure but to try em out.

My SICO emission tester has no Novar socket, I may have to rig
up some kind of an adaptor... I think the other compactron had
12 pins... I don't have any of those.
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Old 17th June 2008, 10:09 PM   #3
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If you ever need any of the 12 pin sockets, I bought 50 from China last month, and I certainly won't use them all.
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Old 17th June 2008, 10:13 PM   #4
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Most any of the TV horizontal output compactron tubes are suitable for audio outputs as long as you are not using the typical Ultralinear mode from xfmr taps (since the screen voltage ratings are usually lower than the plate V ratings). The 6 and 12V heater ones have been pretty well picked over by now though. Lots of odd fil. voltage ones yet though. Sockets may not be too easy to find. Best to find some sockets first before ordering the tubes.

Don
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Old 17th June 2008, 10:15 PM   #5
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Sockets are certainly not a problem. Any recommendations?
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Old 17th June 2008, 11:03 PM   #6
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http://www.mif.pg.gda.pl/homepages/f...123/6/6FY7.pdf

Double triode, 7 watt dissipation on the T unit.
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Old 17th June 2008, 11:35 PM   #7
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Funny you mention that, I have a Zenith 6FY7 sitting out as a candidate, but that's still a pretty light duty tube for output. I was hoping for about twice that dissipation.
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Old 17th June 2008, 11:52 PM   #8
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Ten is common but I think the max you'll find is ~14 watts on the secondary.
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Old 17th June 2008, 11:53 PM   #9
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This one is pretty beefy. The 36V heater version is a lot cheaper. There are lots of choices with 17 to 30W ratings.

mike
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Old 18th June 2008, 01:09 AM   #10
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Ooops, you're right. I had dual-compactrons on the brain since I tried a few as spud headphone amps.
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