On Wed, Apr 16, 2025 at 08:59 AM, Peter Voelpel wrote:
Yes, power is never calculated with peak voltages.
73
Peter, DJ7WW
That's what I thought too.? It shoulda been? RMS cathode voltage? X? DC grid current? =? Grid dissipation.................. BUT it's not.?
Eimac uses? PEAK? RF? cathode voltage X? DC grid current =? grid diss.?
On a L4B, it runs 300 ma? DC grid current and 800 ma plate current? at 2.5 kv under load.?
With 100 watts? drive it amounts to either:
(A) 70.7 vrms x .3 =? 21.21 watts? ?grid diss
(B) 100 V peak? x .3? =? 30 watts grid diss.?
The above is for TWO tubes.? ?Each tube has? 20 watts of? CCS grid diss.? ?So a total of 40 watts? CCS grid diss.?
Perhaps Reid Brandon? will chime in.? ?Right now, I can't fathom why Eimac would use peak cathode RF voltage? instead of? RMD cathode voltage.?
