>
>
>I'm quoting without names a message from what our CB brethren are up to.
>
>
>"Take for instance...
>
>
>2X4CX15,000 being driven by 3X8877
>Ep was close to 14 kV on the 15,000s....
>
>Power output was capable of over 80,000 watts Bird. Tuning it up, with
>a
>1 kW slug in the Bird meter for reverse measurements, we couldn't get it
>to
>wiggle up to 40 kW forward output. At the 44 kW mark (or thereabouts),
>we
>blew the top of the antenna off, a nice blue corona came, and the
>antenna
>spit flames! Nice, to say the least. The tubes are run Class C, and
>tetrodes are the tube of choice. What with screen volts, you get better
>efficiency. Just have to keep those grids biased WAY negative, and you
>can
>live with the higher plate voltage.
>
>After that, we went to a "fighting stick" (Quarter wave, usually made
>from
>3/4 inch copper pipe, chrome plated) and we where able to tune the amp
>to
>75 kW. It still had more to go, but that was where we left it for a
>competition. This was the inaugural run of the amp.
>
>You might wonder where the power comes from for one of these beasts (and
>this is smallish. The last one that I saw perform (over 4th of July)
>was
>capable of nearly 125 kW Avg. output)).
>
>Usually it is a big block motor, using alternators made by the
>Electrodyne
>company. They are designed as Locomotive Braking motors, but run with a
>small voltage on the field, they will act as an alternator... They are
>dual
>stator, single rotor, producing 60 volts at 600 amps each stator, run
>full
>field. Run 5 to 7 of these.
>
>Engine: Large stroke, large bore with Nitrous is the name of the game.
>Typically see 500+ horsepower.
>
>So, you see, the CB community has really started going nuts. I don't
>agree
>with the power levels run, but that is what the market "demands".
>
>Like I said, if you want a good "big picture" scene, look at
>www.bigradios.com/shadow... Come see what us goofy CBers are doing.
>
>I had one blow the high voltage power supply from my video camera.. I
>was
>about 100 yards away... This was from near field radiation picked up by
>the
>power lines."
>
>
>Oh Boy, Phil W2GE
>
Bovine Feces.
>
- Rich..., 805.386.3734, www.vcnet.com/measures.
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