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wrote: trouble ### How much is 400 Euro's in US dollars ?? Think it's at least $600-$700.... + socket. $1400.00 for 2 of em.... not a chance... no bargain there. A YC-243 is still a way

wrote: ######### The YC-243 is a SOCKETLESS tube. They took a 3CX- 4500F3 industrial heater tube [looks identical to a 3x6.. except it has no socket, is low mu and has a grid flange.. and lugs

The chinese 8877 at 400 Euros seems to be a good choice, a company nearby uses about 50 of those for two years without any trouble 73 Peter

I guess the YC-243 is the same tube with a different socket 73 Peter

After having conversed with Jim over the last few days via email, I'm inclined to believe the new "tube of choice" is going to be the YC-243... It seems like the way to go. Not to mention, the 11

The 8877 is a waste of money, for the dollars they choose to demand for it. For the price of a new 8877 you can purchase an 8170 and socket on the used / pull market. For about the same amount

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: