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What bites is when the manufacturer purposely keeps it out of stock to make it look like it is a good thing and drive the price up. BOB DD

Yeah Peter, For some reason, the good stuff is never in stock. BOB

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