I don't know if laughing more to the claimed amplifier structure and
performances or to who believes it.
(repost this message next april 1st)
73,
Mauri I4JMY
-----Messaggio Originale-----
Da: Phil Levin W2GE <w2ge@home.com>
A: <amps@contesting.com>
Data invio: giovedì 14 ottobre 1999 2.04
Oggetto: [AMPS] You gotta read this....
>
>
> 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
>
> --
> FAQ on WWW: http://www.contesting.com/ampsfaq.html
> Submissions: amps@contesting.com
> Administrative requests: amps-REQUEST@contesting.com
> Problems: owner-amps@contesting.com
> Search: http://www.contesting.com/km9p/search.htm
>
--
FAQ on WWW: http://www.contesting.com/ampsfaq.html
Submissions: amps@contesting.com
Administrative requests: amps-REQUEST@contesting.com
Problems: owner-amps@contesting.com
Search: http://www.contesting.com/km9p/search.htm
|