[Amps] Grounded Grid(Screen) 4CX250B power gain

[donroden at hiwaay.net]

I had a 30L-1 "lookalike" that used four 250Bs in GG. The control  
grids were grounded through resistors and the screen terminals on the  
sockets were bent over and soldered to the metal socket.  Don't know  
about tying the cathode to the control grid.... ( ????? )

Don WA4NPL


Quoting Hsu <hsu4qro at gmail.com>:

> Hi, George,
> I just  modyfy the Henry TEMPO 2001
>   convert the 3CX400A7  to 4CX250B in GG configation, tied the  
> cathode and G1(serial a 100ohm resistor) together.
>     I'll test it today.
>      73!Hsu
> ----- Original Message -----
> From: <gdaught6 at stanford.edu>
> To: "Hsu" <hsu4qro at gmail.com>
> Sent: Monday, July 20, 2009 5:26 AM
> Subject: Re: [Amps] Grounded Grid(Screen) 4CX250B power gain
>
>
>>> Nin hao George,
>>>    Have your built the amplifier like this GG configation?
>>
>> No, I haven't built one in GG.  I always use "passive grid  
>> configuration", with a
>> resistor driven by the exciter, and the grid just attached to the  
>> top of the resistor.
>>
>> 73,
>>
>> George T Daughters, K6GT
>> CU in the California QSO Party (CQP)
>> October 3-4, 2009
>>
>>
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