Just did a little googling on these events, of which I knew nothing prior to
this thread. Here's a representative site:
http://www.bigradios.com/avis/
Who knew? Yikes.
Bill W5WVO
--------------------------------------------------
From: "Jim Thomson" <Jim.thom@telus.net>
Sent: Wednesday, April 07, 2010 5:45 AM
To: <amps@contesting.com>
Subject: [Amps] Hmmmm...Legal limit boiled the oil in the cantena
> Date: Tue, 06 Apr 2010 19:50:25 -0400
> From: Roger <sub1@rogerhalstead.com>
> Subject: Re: [Amps] Hmmmm...Legal limit boiled the oil in the cantena
>
>
> It's all for show. They don't need near that HP to run them, they don't
> need nitrous oxide. More than likely the crank broke from the
> acceleration and extra power from the nitrous oxide.
>
> ## with a 350 V-8... You either use a steel forged crankshaft
> or a 454... take your pick. A stock 350 crank will eventually break.
>
>
>
>
> Figure the
> monstrous SWR from a mobile antenna being fed 75000 watts.
>
> ## what SWR ? There isn't any. The connectors would flash
> over if there was any amount of swr.
>
>
>
> It'd look
> like a lightning generator. But it's unlikely they can do better than
> 50% efficient with the setups.
>
> ## the monoband Rf decks are a lot more than 50% eff. They
> have the ants down to a fine art.
>
>
>
> So given 150 KW input they need 201 hp
> plus change.
>
> ## On the last gen set install at work, a few yrs back, the
> power eng tells me the fan blades, used to cool the rad,
> ate up 65 hp alone... and that was not a big gen set.
> The lousy power factor + harmonics from the HV power
> supply are hard on any gen set.
>
> ## a typ 60 kva gen set would use a 120 hp diesel motor,
> no turbo, and 410 cu inch displacement.
>
>
>
>
> Given the generators are not 100% efficient AND the output
> frequency will change with RPM who knows what they get out of them.
>
> ## The 4x15 will require 10 kv @ 6A.. and that's just for one tube.
> These 11m ops will increase the fil V by 5-9%, to get more emission
> from them. After the 10 sec shoot out, the fil v is quickly reduced.
>
> ## some of em used a special 3 phase plate xfmr. [dahl built some of
> them]
> Some used train locomotive generators. Single rotor, dual stator, 1000A
> per
> stator.
>
> ## apparently, the prize money can be well over $25K+ on weekends,
> I dunno who bank rolls all this. Sure, they are nuts.. but they are
> having
> ..'fun'... and keeping the tube rebuilders in business. Just trying to
> generate
> the power in the 1st place would be 90% of the tech problem. .
>
> Jim VE7RF
>
>
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>
>
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