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If they grid drive it...... that tube has a whopping 370 pf of input C.

They don’t calculate , they use the trial and error method. They think it’s normal to loose a doorknob cap, vacuum variable capacitor, tube etc. Swap part with the next size up and repeat.

When bolting-up the tube sockets for the GU-84b's I could tell they were some doozies. Cleaning the silver metal without removing it from plated instead of solid metal contact areas required a

It appears they have already? been notified that their proposed? cathode driven config...with both screen and grid bonded to the chassis? is fubar, and the poor control grid will vaporize....with

Hey Scott - I watched bits of the video. I saw the plan to power the plate TX with 240V !! Jeez…..! I, like you, enjoyed Jim’s points of issue. John VK6JX P.S my YC156 amp is going great guns on

I think Luke and John will get it working before SpaceX arrives on Mars, both projects have the potential to make a big BOOM! Here's a theoretical design using a 4CX3000A as a driver: Redesigned

One or more of the readers herein have constructed linear amplifiers capable of more than the two kilowatts input our tickets say is kosher for the ham bands. We do so in order to solve a problem

BBI: "I'm gonna need my goo drop resized to a bunch of 4-ought wires." Electric Company: "Just how acres is yer grow house gonna be??" He's gonna need his own cooling lake, too. Is this guy one of

I suspect this project will only end with embarrassment for all parties involved. I do not watch the videos this person publishes. I watch and read only what I know to be correct, With the intent to

Looked at more of the BBI video.? He has done the fil choke wrong.? His method will saturate the type 43 cores.? ( no bifilar action).? ?The reason 2 x wires are passed through the core, or 2 x

No one answered my question. Maybe no one had the answer. I bought on

Maybe one should check the design of WLW back in the day w/500KW AM .. and reportedly they had it up to 800KW just for fun. Just observ'en. Andy

Freakn Crazy! Well, if anyone from that specific genre that coild seriously attempt and build such a beast, it would be Luke that could possibly? get away with it. I wonder who has the.deep pockets

I'm betting this will be an epic failure.? I'll put money on it. BBI, in his infinite wisdom, is documenting the....'worlds biggest 11m amplifier' on his U tube channel. Using the 4CW-100,000E water

Look on e-Bay.....

I'm going to bore you again with my L-7. The 4 lamps that light the two galvanometers are out of order (strange). They are powered by the 5 volts (alternating current) of the filaments of the

Hello Thanks Alek for resuming the dialogue. You are the only one who has reported this risk of non-degassing to me. Like me, you are faced with a reduced regulatory RF power You had told

Hi Francois. I would suggest you leave it as zero bias, without any diodes. As you say, with just 500W PEP output, the tubes will not get hot enough to de-gas. Your solution of running the amp at

Hello Okay, I got it. It's the receive polarization that I didn't understand. Now it's ok. What quiescent currents should I get to and in what mode (SSB/CW), knowing that I want to output 500

Draw it and take a picture and post that????