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Registered Member #543
Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
Hi Radhu,
I got about 1.5 μSv/hr @ 10mm from the tops of my two 4C35A H2 thyratrons using a Fluke Victoreen 440RF/D ion chamber dosimeter, and about 1 μSv/hr @ 10mm using a Mini Instruments 900 series Mini Monitor with GM gamma probe.
The green uranium glass pigmentation on my 4C35As doesn't look as dense as it appears in your images, but perhaps this is just a trick of the light, or fluorescence.
At these low levels, background forms a significant percentage of the total count, so you'd need a long integration time - say 12 hours - to get much more accurate dose rate estimates than these.
Registered Member #1938
Joined: Sun Jan 25 2009, 12:44PM
Location: Romania
Posts: 699
5J29 split anode magnetron. This device is water cooled, the water flowing round the metal loop. Identical to 5J29 = CV3842 = ZP579 Filament Vf 2.2 Volts / If: 35 Ampere / -: Direct / Description External magnet, split-anode, glass body CW magnetron; 350 to 770MHz; 75 to 150W out. Liquid-cooled through the anode tubular pins and the internal loop, part of the tuning line resonator. 450mA max at 2500V, 1500 gauss flux density. Used in the AN/APT-4 jammer. 'Confidential' etched on the glass.
The 5J29 is an unusual device, a water-cooled split anode magnetron, used primarily in the AN/APT-4 radar jammer. Unlike a conventional multicavity magnetron, the 5J29 is effectively a miniature cyclotron accelerator. The 5J29 is best known as a GE product; the second-source FTR version is much rarer. The 5J29 operates at frequencies between 350 and 770MHz.
Registered Member #1938
Joined: Sun Jan 25 2009, 12:44PM
Location: Romania
Posts: 699
External Cavity, 1KW at 1075 to 1096MHz. 'Electrodeless' discharge: the tube has the ground ring and a keep-alive electrode connection in the base. Made by Bomac and Sylvania. It measures 38x20mm (12mm across glass).
Registered Member #543
Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
radhoo wrote ...
5J29 split anode magnetron. This device is water cooled, the water flowing round the metal loop. Identical to 5J29 = CV3842 = ZP579 Filament Vf 2.2 Volts / If: 35 Ampere / -: Direct / Description External magnet, split-anode, glass body CW magnetron; 350 to 770MHz; 75 to 150W out. Liquid-cooled through the anode tubular pins and the internal loop, part of the tuning line resonator. 450mA max at 2500V, 1500 gauss flux density. Used in the AN/APT-4 jammer. 'Confidential' etched on the glass.
The 5J29 is an unusual device, a water-cooled split anode magnetron, used primarily in the AN/APT-4 radar jammer. Unlike a conventional multicavity magnetron, the 5J29 is effectively a miniature cyclotron accelerator. The 5J29 is best known as a GE product; the second-source FTR version is much rarer. The 5J29 operates at frequencies between 350 and 770MHz.
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What are the most interesting vacuum tubes in your collection?
