Many years ago I ran a Heath Warrior at 800w thru my 250 Matchbox and it
never got warm, but when I looked inside, the plastic(?) coil form had
melted around the coil wires . Check inside! GL 73 Saul K2XA
----- Original Message -----
From: "Jim Brown" <jim@audiosystemsgroup.com>
To: "Towertalk" <towertalk@contesting.com>
Sent: Monday, March 24, 2008 12:59 AM
Subject: Re: [TowerTalk] Johnson Matchbox
> On Sun, 23 Mar 2008 21:32:43 -0700, Tom Osborne wrote:
>
>>Ran 500 watts with the SB-200 and it didn't even get warm.
>
> Dissipation depends on the voltage and current in individual
> components, which in turn depends on the exact values of complex
> impedances being transformed, the frequency, and, of course, the
> power level. A capacitor that runs cool under one set of conditions
> may go up in smoke under a different set.
>
> Not to worry -- excessive dissipation is usually signalled by a
> special alarm that seasoned hams know well -- you begin to smell
> them getting warm!
>
> 73,
>
> Jim K9YC
>
>
>
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