-----Original Message-----
From: Ron Spencer <n4vos@mis.net>
To: measures <measures@vcnet.com>; Phil Levin W2GE <w2ge@home.com>;
amps@contesting.com <amps@contesting.com>
To: <amps@contesting.com>
Date: Thursday, October 14, 1999 9:05 PM
Subject: Re: [AMPS] You gotta read this....
>And one more thing I guess they was feeding it with 4 inch rigid electrical
>conduit! or was it RG 58
>-----Original Message-----
>From: measures <measures@vcnet.com>
>To: Phil Levin W2GE <w2ge@home.com>; amps@contesting.com
><amps@contesting.com>
To: <amps@contesting.com>
>Date: Wednesday, October 13, 1999 5:32 PM
>Subject: Re: [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
>>>
>>Bovine Feces.
>>>
>>
>>
>>- Rich..., 805.386.3734, www.vcnet.com/measures.
>>
>>
>>--
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>>
>
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