[Amps] Tube Class C operation no Drive power or grid current

[Fuqua, William L.]

Note:
Zero drive and grid current is only with 3kV plate voltage and as CLASS-C Oscillator or Amplifier. (CW, FM, PM)
Notice not the same for 2kV plate voltage but same efficiency.

73
Bill wa4lav
________________________________
From: Fuqua, William L. <wlfuqu00 at uky.edu>
Sent: Saturday, October 8, 2022 6:09 PM
To: Peter Voelpel <dj7ww at t-online.de>
Subject: Re: [Amps] Tube Class C operation no Drive power or grid current

I was discussing two separate things.
One was Class C CW Oscillator or Amplifier operation

The second was advantage and disadvantages of Suppressor grid modulation.

73
Bill wa4lav
________________________________
From: Peter Voelpel <dj7ww at t-online.de>
Sent: Saturday, October 8, 2022 2:54 PM
To: Fuqua, William L. <wlfuqu00 at uky.edu>; 'Amplifiers' <amps at contesting.com>
Subject: RE: [Amps] Tube Class C operation no Drive power or grid current

CAUTION: External Sender


The RCA data sheet shows the opposite:

https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Ffrank.pocnet.net%2Fsheets%2F049%2F4%2F4E27.pdf&data=05%7C01%7Cwlfuqu00%40uky.edu%7C0348c5c8fcc44d31881f08daa95e98de%7C2b30530b69b64457b818481cb53d42ae%7C0%7C0%7C638008521428471840%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C2000%7C%7C%7C&sdata=zUk2wvKkRV7pzkCh4f8LNimqb7TU89kHLo9D%2Fb0VMsk%3D&reserved=0

73
Peter, DJ7WW

-----Original Message-----
From: Amps [mailto:amps-bounces at contesting.com] On Behalf Of Fuqua, William
L.
Sent: Samstag, 8. Oktober 2022 20:38
To: Amplifiers
Subject: [Amps] Tube Class C operation no Drive power or grid current

    Maybe I have not looked at the data sheets very closely , but I was
surprised to find a medium power glass Pentode that required zero grid
current, thus no drive power in class-C operation.  The 4E27, not the A
version