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A reliable and not too expensive solution might be this version of 3CX6000A7 by Svetlana: "Better mechanical rigidity and long lasting concentricity of the filament is obtained from the improved

The trend is for cheap reliable power. A couple 8877's will make moderate power at medium risk. A couple 3CX1200A7's will make almost as much power with low risk. Their limit to maximum power is its

[snip] [snip] I agree. Here's the breakdown: The 8877 tube is hellishly expensive and has a filament that is extremely sensitive to shortened life because of a few hundredths of an overvoltage.

Seems to be alot of hams going to the GU84B tubes for their Big amps over the 8877 or even the old 4-1000.

wrote: negative feedback to quad 811s ### The file I uploaded has nothing to do with 811's. ### W5CUL and myself wrote it last spring.[6 x months to write and research it, and test everything]

Check the old RCA transmitting tube handbook showing how to apply RF negative feedback to quad 811s ham_amplifiers@... wrote: Hello, This email message is a notification to let

Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the ham_amplifiers group. File : /mkvmods1_0.pdf Uploaded by : pentalab

1800 Toll Free wrote: Wouldn't that be pronounced a "harmonica-meter" or "monicatometer" or"harmonomominer" on 11M? One day, given some technological strides, with DSP the 11M op will be able to

<TollFree1800@...> wrote: transistor these type of (read unkey ### why not just use a PEP reading wattmeter ?? Everybody and their dog makes pep boards for the bird/CD wattmeter's. Those depicted

It's something like this: Voltage sampler, 1N series diode detector based 10Kw RMS meters. Then, take the negative feedback off one side of a popular two transistor amp (2X2290, Texas Star

I propose we have a new class of amplifier for the 11 meter crowd... As it sits, we now have A AB1 AB2 B C etc. Shouldn't somewhere, there be a class CB..... :) ./End open

like a dispersive and compressive delay line in a radar system. What a cool idea run square wave and reconstruct. Class I amplifier (for idiot mode) Harold Mandel <ka1xo@...> wrote:

[snip] Take an amp, change a couple caps to make the harmonic-o-meter swing farther to the right, and call it 'your' design. [snip] The snippet above implies a device to measure harmonic content.

I wonder if Sonny was the last person to work on it, so they are claiming it is a "sonny" built box. That's the latest trend of 11 meter 'techs'... Take an amp built by someone else, change a

The cost of inverters that approach a sine wave rises as the quality of the output waveform approaches "linearity." It's the same sort of exercise as the digital photography evolution. A

You can get a clean output from a converter if the sample frequency is high enough. I run tube and solid state PDM AM and make clean audio running a 75 KHz. sample frequency. You also need a good

wrote: there is no would be It don't look like any "real" human being has bid on this yet. If they did, they're a fool. Most CBr's I know have better sense than that. I personally wouldn't give no

wrote: Hals correct. An alternator less the rectifier stack produces the best sine wave possible. It is as pure an AC 3 phase current as delivered by the power company. Most inverters produce either

A fellow from another BB asked the seller about it. He said that there is no way that "thing" is going to pump out 36KW. She told him he was not qualified to make that statement and that question

wrote: to the relay. This stuff may be good for 300 watts or so not 10kw. > ### agreed... UNLESS it's RG-393... which is a tiny bit smaller OD than RG-213 .390" vs .405" ## The kicker