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Re: [Amps] LK 500 ZA heat

To: "Steve Thompson" <>, <>
Subject: Re: [Amps] LK 500 ZA heat
From: "jeremy-ca" <>
Date: Mon, 13 Aug 2007 18:01:56 -0400
List-post: <>
The folks at Kenwood understood air flow and designed a good system that 
really doesnt need any additional help.
They use the exhaust method on their old tube transceivers also and it works 
great. The key is to have sufficient inlet volume; Ive seen many designs 
that are too restrictive.

If anyone is concerned about spot temperatures inside the RF cavity of that 
or any other amp heat indicating paint and adhesive strips are available. 
Ive found them very useful when designing the cooling system for high power 
industrial amps.


----- Original Message ----- 
From: "Steve Thompson" <>
To: <>
Sent: Monday, August 13, 2007 5:18 PM
Subject: Re: [Amps] LK 500 ZA heat

> Gary McAdams wrote:
>> My question is: Would it be advantageous to add additional cooling via
>> something like added muffin fans on the sides pushing air into the amp?
>> Or would that just be a waste of time?
> It might be useful - but not necessarily because of any effect on the
> amount of airflow. Air is like water, and follows the easiest route,
> This means it goes past and round objects, often leaving a layer of
> still air on their surface. Still air is a good heat insulator. Sucking
> air tends to produce this sort of flow. The air coming out of a fan is
> turbulent, and this can increase cooling effect by increasing the
> contact between moving air and the hot surface.
> Steve
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