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Old 6th November 2008, 06:27 AM   #1
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Default thyratron rectifier

can someone please explain me how to use a gas filled thyratron as a rectifier - and if possible with some schematics please......

thanks a lot for any effort....

i am a total idiot related thyratrons.....
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Old 6th November 2008, 07:05 AM   #2
Gluca is offline Gluca  Italy
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I use them in "grid as plate" mode: the grids are to be connected to AC and the plates left alone (do not touch them... hi-volts are anyway present!). Pretty simple. You do need to cook them for 1 hour (fils on, AC off) before the first "ignition"; and 30secs - 1min when used daily. If they do not ignite or are prone to arc over just replace them (or try lowering the AC voltage in case of arcs).

Mind the max voltage! They can withstand lower AC this way. I use WE394As and they can go up to 300-350VAC grid-to-cathode. You need bigger thyratrons for higher voltages

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Old 6th November 2008, 09:21 AM   #3
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thanks.........
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Old 6th November 2008, 12:44 PM   #4
Gluca is offline Gluca  Italy
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Me! I Forgot! You want to use choke input filters ...

Ciao
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Old 6th November 2008, 01:30 PM   #5
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right - no problem with that
thnx
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Old 6th November 2008, 02:05 PM   #6
JoshK is offline JoshK  Canada
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What color do they glow?
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Old 6th November 2008, 02:58 PM   #7
Gluca is offline Gluca  Italy
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A blue glow (as all the mercury recfiers). The bird cage let the filament shine through. Lovely, isn't it? Some do not have the bird cage but a closed plate.

http://www.paolopoli.it/Audio/Bottom2008/img_1042.jpg
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Old 6th November 2008, 03:02 PM   #8
JoshK is offline JoshK  Canada
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Wow, those are beauts!

Somehow I was thinking Thyratrons were another type of gas, not mercury and glowed purple. Never experimented with this stuff before.
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Old 6th November 2008, 03:46 PM   #9
kevinkr is offline kevinkr  United States
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Hi Gianluca,
How much current can you safely draw doing this and have you tried tying grid and plate together?

Just curious..
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Old 6th November 2008, 06:47 PM   #10
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Quote:
Originally posted by JoshK
Wow, those are beauts!

Somehow I was thinking Thyratrons were another type of gas, not mercury and glowed purple. Never experimented with this stuff before.

thanks for asking this letter....

yes - mercury is glowing very, very nice.... heheheheh
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