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Megawatt Eimac tube on Ebay. No, really!

nomadradio

nomadradio

Analog Retentive
Apr 3, 2005
7,001
11,188
698
Louisville, KY
www.nomadradio.com
Anyone of a "certain age" will remember the late 70s Eimac magazine ad showing a toddler standing next to this tube, almost tall enough to reach the top of the thing.

https://www.ebay.com/itm/EIMAC-X-21...114394?hash=item25d8faf15a:g:ndIAAOSwcj5ZQgK5

The tube's filament alone draws over 10 kilowatts and has its own mini-water jacket separate from the pipe fittings on the anode.

Still wrapping my mind around a power supply delivering 20,000 Volts at 45 Amps.

Gotta figure the rebuild cost on this tube is kinda steep.

73
 

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So here's a detail on this tube I had never caught before. Musta never looked closely at the data sheet.

8973_detail.jpg

First tube I remember seeing with its own vacuum pump.

73
 
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One for the RF final, two for the modulator in push-pull.

Bear in mind the modulation transformer will look like the parking-lot walk-in freezer behind the pizza hut.

Never mind what the power transformer will need to be.

A filament transformer for just one of these will be ginormous.

Visited the VOA museum between Dayton and Cincy. Got some pics of stuff from the retired 200,000-Watt transmitter. Gotta post some of those.

73
 
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6C5676F2-29C0-4BE4-AF87-BCBAE54D3B77.jpeg


Nope.

You’re going to need a REALLY great friend in the US Navy to fetch home serious turbine power for mobile use.

Fuel burn could be a problem, though. 3k gallons/diesel won’t last long (assuming 10k for powerplant and necessary).

BUT the world of OVERDIMENSION freight offers all sorts of possibilities.

Let’s send along a mobile crane and support vehicles to erect that 200’ mast.
 
Wow impressive tube and power levels, great for mobile use, but not enough steam for base use.

Jay in the Great Mojave Desert
 

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