[Amps] GS 35B
jeff millar
wa1hco at adelphia.net
Sun Jul 25 01:46:04 EDT 2004
Note the phrase "grid driven". None of the nd2x.net QRO GS-35B,
including DL4MEA, amps uses grid driven.
It would be an interesting choice with less drive power required. But
probably a lot more than for a tetrode due to the high grid current that
GS-35 Amps ususally run. The voltage swing has to remain the same, but
the drive current drops from plate current plus grid current to just
grid current....about from 600 mA + 150 mA to just 150 mA.
Approximating...that means the drive impedance rises by 4x and the drive
power drops to 1/4 and overall gain rises by 6dB...from 10-13 dB to
16-19 dB.
All this assumes the builder can arrange the components and neutralize
the thing...but that was the original question...
jeff, wa1hco
Frank Goenninger wrote:
>Hi John -
>
>On Fri, 2004-07-23 at 18:13, JMLTINC at aol.com wrote:
>
>
>>Hi to all-
>>
>>Has anyone built a 2m, grid driven, GS-35B amp? I would appreciate some thoughts on neutralizing teqniques for this brute.
>>
>>
>>
>
>No my self, but see just one example at
>
>http://www.qsl.net/dl4mea/2g35.htm
>
>
>
>>Thanks in advance!
>>-John N9RF
>>
>>
>
>You're welcome.
>
>73, Frank, DG1SBG
>
>_______________________________________________
>Amps mailing list
>Amps at contesting.com
>http://lists.contesting.com/mailman/listinfo/amps
>
>
>
More information about the Amps
mailing list