Hello, I am brand new to this site I was the one who sold that "Old Buzzard Rig on ebay I am trying to sell all of my Uncle" stuff for my Aunt seeing she is on a fixed income I am running out of luck trying to find out if these GL-434A tubes have any value to anyone .I have 4 of them brand new sealed in a box. They were made by General electric any help I would be grateful thanks in advance Greg
Why not post a couple of pictures of one here? Are they as shown?
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so far this has turned up re uses of the tube other than military radar and suggests a 2000-2500W plate dissipation:
The Alvarez Linac's parameters:
f 200 MHz
RF Power 450 kW peak/tube
Repetition Rate 15 pps
RF Pulse Width 600 microseconds, 400 in flat
Number EIMAC 3W10000A3 “tubes” 9
Proton Beam Energy 32 MeV
Accelerator Length 40 feet
Accelerating Gradient 2.6 MV/m
The Alvarez LINAC ('45-'55) started with 36 war-surplus GL-434 triode tubes, with 4 tubes parallel connected to get the power. These tubes “had such a high casualty rate while in operation” (that they) had to upgrade.
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from:
http://home.comcast.net/~n6jv/gl434.htmlThe GL-434 is a forced air cooled triode power tube (the potato masher). Used in the BC-677, but no additional data is available. Length = 5.25" Diameter = 2.50" (picture)
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SCR-268, T1, A, B, C - Search Light Control
Frequency: 205 MHz, 1˝ meter wavelength
Power Output: 50 kw
Pulse Width: 7 to 15 µseconds
Pulse Repetition Rate: 4098
Range: 40,000 yards
Vertical Coverage:
Horizontal Coverage:
Antenna:
Speed:
Beam Width:
Indicator Type and Quantity:
Manufacturer:
Notes: Had a provision for data transmission to a searchlight or gun director; 1940-1945, 2,974 procured.
The SCR-268 Radar;
more on the radar here:
http://www.mobileradar.org/radar_descptn_2.html#scr_268]]]]]]]]]]]]]]]]]]]]
The BC-677 transmitter is described in military manual "TM 11-1060", 1943 - -this would be the best publication as to the original use of the tubes. Also see TM 11-1062.
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finally, there is a very specific company
http://www.radiores.com/He might buy as spares. His site is worth a look for anyone!!!
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What are they worth? Could not turn up more. If as implied in the LINAC data the tube works at very high frequencies, it is perhaps fun. However, the apparent scarcity of them -including- the scarcity of any info on them, as well as the unusual connection pins/socket requirement (apparently they operate anode-down as shown), may limit the "high value" of them to what someone who is currently using them, would pay for spares. The ones that would pay the most would be collectors who have the radar, a longshot to be sure. check mobileradar.org for potential customers? Tube collectors? No doubt these are fine tubes, but a ham operator would need to know some of the basic specifications before considering building with them. The manual for the BC- or SCR- might provide some information.
Since Western Electric made the radars, and western electric collectors are a rabid lot, one of them might pay a fortune, if the tube (one at a time) were marketed "properly". Western Electric rare secret new in box WWII radar tube HUGE! Great for audio! blah blah blah.
