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.
73
Bill wa4lav
________________________________________
From: Amps [amps-bounces@contesting.com] on behalf of sm0aom@telia.com
[sm0aom@telia.com]
Sent: Thursday, November 19, 2015 4:48 PM
To: stevewrightnz@gmail.com; amps@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.
73/
Karl-Arne
SM0AOM
----Ursprungligt meddelande----
Från : stevewrightnz@gmail.com
Datum : 2015-11-19 - 21:57 (UTC)
Till : amps@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?
http://frank.pocnet.net/sheets/030/t/TB5-2500.pdf
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