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Ahhha... in that example, Eimac is calling the *SWING* of plate or grid voltage "*peak*". *I've* always considered the "peak plate voltage" to be the *most positive voltage* that the plate can attain

Sorry, Eimac said different in "care and feeding of power grid tubes". Your formula is for driving power. 73 Peter -----Original-Nachricht----- Betreff: Re:

I can’t help but chime in: RMS is the only value that makes sense. Outlet voltage in your house is 120 V RMS. There’s no such thing as “RMS power”; peak power come from peak RMS values.

Duty cycle is considered. These are peak voltage obtained by 100% duty cycle continues wave. the Eimac formula for calculating grid dissipation is based on peak. Pg = vga X Ig anyway, anything I

Hmmmm….It seems to me that Vgc should be the RMS, NOT the peak value in determining the grid dissipation. The RMS value will determine the actual amount of heating. This makes the dissipation

I agree Lou, and I have also heard Tom talk about time, duty cycle and “thermo lag”

Don’t forget that the ratings on the tube are key down 24/7 CCS.. ?W8JI will tell you like he said hundreds of times before that the killer of tubes is not a slight over plate or grid current

The formula for grid dissipation is Pg = Vgc X Ig where vgc is the peak positive grid to cathode voltage. Ig is the DC grid current. grid dissipation is peak voltage multiplied by Grid current. If

The person to ask to clarify this would be the man who designed the SB1000 and AL-series: Mr. W8JI, hisself. Steve, K0XP

V-rms obviously yields watts-RMS, and Volts-peak gives watts-peak. Because SSB is measured by it's peak: Peak Envelope Power. RMS only applies under continous carrier conditions. Steve, K0XP

On Wed, Apr 16, 2025 at 08:20 AM, KG2RG wrote: > > Jim, W6SAI, best book around!!! Sometimes called the West Coast book, > sometimes called the big green book, the Radio handbook by William ?I

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

That 1 kw pep output from the single 3-500Z? is because they are using IVS? (intermittent voice ratings) for SSB.? ?That operation was approved by Eimac. IE:? it's because of the low duty cycle

Francois.? No problems with removing all those grid caps and grid chokes.? ?Save the 2 x grid chokes. Use 3 x separate copper straps? for each tube....then bond the? 3 x grid pins directly to

Jim, et al. I just learned a few things that should be of interest on the subject of Econco. This morning I had an inquiry from a local broadcast engineer I know. He asked me about a 4CX12,000A

“ In France, we're limited to 500W, but I wonder how in the USA you can reach 1 kW without exceeding the maximum Eimac values.” how do you reach 1 KW input or output? In France, the power limit

Yes, power is never calculated with peak voltages. 73 Peter, DJ7WW -----Original-Nachricht----- Betreff: Re: [ham-amplifiers] SB-1000 Datum: 2025-04-16T08:05:53+0200 Von: "Adrian Fewster via

If anyone sees this book at a Hamfest, buy it!! This is a great book.

Jim, W6SAI, best book around!!! Sometimes called the West Coast book, sometimes called the big green book, the Radio handbook by William ?I Orr, great stuff!!! Heathkit and Ameritron were able to

I agree with you. That's why with a 2500 V HT I chose a -9 V bias which brings the quiescent current to 2 x 50 mA. The curves I posted are with the original Drake L-7 schematic where the grids are