John / NS1Z wrote:
>At 01:45 PM 7/4/98 -0700, Lane C. Zeitler wrote:
>>
>>Looking at my old Heathkit HA-10 Warrior I see that the designers set it up
>>to be biased for Class B operation.
>>
>>What are the pros and cons of running class B vice g.g.??
>>
>Hmmmm???? I didn't know physical layout and biasing were related, what have
>I missed?
>
Maybe the tube data tables in the ARRL Handbook. They use "GG" to mean
"grid and screen both connected to ground", which is presumably what
Lane was asking about.
This abbreviation adds to the confusion that already existed between RF
grounding and the class of operation - two subjects that are literally
un-connected. The ARRL Handbook ought to explain this in the 'RF Power
Amplifiers' chapter... Dick?
73 from Ian G3SEK Editor, 'The VHF/UHF DX Book'
'In Practice' columnist for RadCom (RSGB)
http://www.ifwtech.demon.co.uk/g3sek
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