[Amps] Hmmmm...Legal limit boiled the oil in the cantena

[Bill VanAlstyne W5WVO]

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 at telus.net>
Sent: Wednesday, April 07, 2010 5:45 AM
To: <amps at 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 at 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
>
>
> _______________________________________________
> Amps mailing list
> Amps at contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>
>