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Registered Member #1412
Joined: Thu Mar 27 2008, 04:07PM
Location: Taipei Taiwan
Posts: 278
Today I show the photos of my 811A VTTC to several people.One of them recognize that it is a VTTC and told me that he once build a VTTC using 4CX250B, it make 3 METER SPARK and the plate voltage he use is 1000 Volt.IS THIS POSSIBLE?
He seems to know a lot about vacuum tubes and he said he is a high power RF engineer.I ask him for the schematic and he said it was lost because he build it many years ago.
I didn't find much information about this tube being used in VTTC.But I know that other tubes with similar plate dissipation rating cannot make 3 meter spark.
Registered Member #152
Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
I think the heater of this tube is able to provide ~0.5-1 A of pulsed cathode current, at 2 kV on the plate this is something aroud 2 kW of peak input. Depending on frequency (and many other factors) you might be able to get a ~30cm (12") long spark in pulse, but more likely not even this.
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4CX250B VTTC can make 3 METER SPARK?Is this possible?
