[Amps] TB5/2500 options

Fuqua, Bill L wlfuqu00 at uky.edu
Fri Nov 20 15:21:47 EST 2015

  I tried a similar tube , 3-1000H in grounded grid just for the heck of it.
It did require a little more than twice the drive power and also grid bias but it worked.
  I sold the tube a long time ago.
  I once ran a pair of 250th in grounded grid driven by my homebrew pair of 6146Bs and it worked 
quite well. I also had to provide bias. 
  My low mu set up some day will be 4 4CX250B with control grid connected to cathode and grounded
screen grid. Driven by a single 4CX250B same configuration. 
Bill wa4lav

From: Amps [amps-bounces at contesting.com] on behalf of sm0aom at telia.com [sm0aom at telia.com]
Sent: Thursday, November 19, 2015 4:48 PM
To: stevewrightnz at gmail.com; amps at contesting.com
Subject: Re: [Amps] TB5/2500 options

The TB5/2500 is a medium mu industrial heating power triode which works best as a Class C amplifier or oscillator.

To use it as an AB2 GG amplifier would probably require impractical drive levels.
A pair in Class C grounded-cathode push-pull would generate a quite comfortable 5 kW CW output.


----Ursprungligt meddelande----
Från : stevewrightnz at gmail.com
Datum : 2015-11-19 - 21:57 (UTC)
Till : amps at contesting.com
Ämne : [Amps] TB5/2500 options

There's one of these tubes available locally.  Would anyone like to
speculate on what it might do?


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