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Re: [Amps] LK 500 ZA heat

To: "jeremy-ca" <>,"Tom Rauch" <>, "dave arruzza" <>,<>
Subject: Re: [Amps] LK 500 ZA heat
From: "Osten B Magnusson" <>
Date: Mon, 13 Aug 2007 21:04:46 +0200
List-post: <>
However Denny Had seems to be doing well now,
please see

73 de Osten SM5DQC

----- Original Message ----- 
From: "jeremy-ca" <>
To: "Tom Rauch" <>; "dave arruzza" <>; 
Sent: Monday, August 13, 2007 8:57 PM
Subject: Re: [Amps] LK 500 ZA heat

>> Pulling air out is a bad idea. Fans do a terrible job of
>> sucking air. Think of them as pressure amplifiers.
>> If you pressurize the inlet of a fan or blower, it greatly
>> increases outlet pressure. If you draw on the outlet it
>> hardly changes airflow. The inlet fan largely sets the
>> volume of air. The same is true for restrictions. If you
>> restrict an inlet, there is a huge air volume change. If you
> Tell that to the millions of car owners with electric fans that pull the air 
> thru the restrictive radiator. Tests have long proven that trying to push 
> the air thru the radiator is a bad idea.
> Placing a small fan in exhaust mode has also saved many sweep tube rigs from 
> premature tube failure. Ask anyone who used Drake C Line in contests for 
> example.
> Amp Supply simply used poor choices for the fans as well as very little 
> egress for the hot air. Ive seen several of those amps with portions of the 
> tops and sides cut out and replaced by perforated aluminum. Mine has a stock 
> cover but the paint is discolored.
> Amp Supply also switched to the proper switch design about mid way thru the 
> life of that ZC product. I was a consultant to Denny and received the 
> LK-500ZC and a LK-781 as part payment. Unfortunately the company went under 
> shortly after due to Dennys personal problems.
> Carl
> KM1H
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