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

[Roger]

Gary Schafer wrote:
>   
>> -----Original Message-----
>> From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com] On
>> Behalf Of Roger
>> Sent: Tuesday, July 21, 2009 5:40 PM
>> To: Carl
>> Cc: amps at contesting.com
>> Subject: Re: [Amps] Grounded Grid (Screen) 4CX250B power gain
>>
>>
>>
>> Carl wrote:
>>     
>>> Yes, if you mean cathode driven. It has less grid dissipation than a
>>>       
>> 250.
>>     
>>>       
>> Yah can't get much less than zero<:-))
>>
>> 73
>>
>> Roger (K8RI)
>>     
>
> The 4CX250 actually can be run in AB2 as it can stand a couple of watts of
> grid dissipation. There are AB2 specs for that tube.
> The 4CX1000 is only rated for AB1 operation. Zero grid current, however
> Eimac says that a small amount of grid current is acceptable for overdrive
> monitoring as in developing ALC from the grid current/voltage change.
>   
That seems strange as the grid is rated at zero watts dissipation.

73

Roger (K8RI)
> 73
> Gary K4FMX
>
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