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Registered Member #316
Joined: Mon Mar 13 2006, 01:30PM
Location: Marietta, GA
Posts: 212
You could make an amazing art piece. Dozens of secondaries with different size sparks on them, dozens of tubes glowing, all on one of your nice acrylic bases
Registered Member #135
Joined: Sat Feb 11 2006, 12:06AM
Location: Anywhere is fine
Posts: 1735
That's because all the lead in and support rods inside that tube are Tungsten. The other prominent factor that stands out is the rose color of the glass to metal seal which also indicates the metal is Tungsten.
Registered Member #223
Joined: Mon Feb 20 2006, 06:42PM
Location: Ottawa, Ontario, Canada
Posts: 125
Damn I really wish I could have been around back then. I have really started to appreciate the technology of yester years. I mean semis are great and all but vacuum tubes are more on a human scale. Plus you can actually see what’s inside of them! Too bad finding tubes these days is damn near impossible. Especially ones like yours.
I have a very small tube collection. Most of them have either a burned filament or lost their vacuum. When I was younger I had a whole box of vacuum tubes but I foolishly thrown them out thinking they were useless. I really kick myself every time I think of that.
My very small tube collection: Four 'Electron' brand 811A's triodes- 1 died when an arc inside the base over heated the support and the glass cracked letting air in. One Raytheon rkr-72 diode - DEAD.. I melted the plate when I was using it as the level shifter diode in my VTTC. One Tung-Sol JAN-CTL-3B24WA diode - Still alive! It is a nice diode with a really big graphite plate. It can process 500ma at 20kv! one RCA 8008 mercury vapor rectifier - not really a 'vacuum tube' but it is still a tube.
Registered Member #76
Joined: Thu Feb 09 2006, 10:04AM
Location: Hemer, Germany
Posts: 458
wow, nice tubes indeed. i have a nice collection of tubes too, not as old as your goodies but still quite impressive. many old pentodes ,siemens,valvo etc, many german tubes from the early 70´s.
mhh, interesting and a bit scary, do you mean the Eimac tubes are radioactive because of the tungsten supports inside?
Registered Member #30
Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
Wow! awesome tube collection! I like collecting tubes too but I only have audio ones. The biggest power tubes I have are some GEC KT88s. I had them in my guitar amp for a while but they would overload the power supply when the volume was turned up full
As to where to get them, I pulled mine from old equipment that was getting scrapped at the university EE department or bought them at flea markets. I also bought a couple of Russian 5881 tubes to see what modern tubes are like. The Russians still make a variety of tubes including the Svetlana 572B, a souped up 811-like tube that would make a good VTTC driver (it's expensive though) The Chinese make tubes too, but the Russian ones seem to be better.
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VTTC Tubes
When I was younger I had a whole box of vacuum tubes but I foolishly thrown them out thinking they were useless. I really kick myself every time I think of that.
