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Re: LF: On Air Testing

To: [email protected]
Subject: Re: LF: On Air Testing
From: [email protected]
Date: Sat, 8 Nov 2003 12:28:35 -0500
Reply-to: [email protected]
Sender: <[email protected]>

With all the comments on Loads,,, put them in a container and add mineral
oil
would really boost their rating ,, just allow for some venting

Bob  K3DJC

On Sat, 8 Nov 2003 01:23:05 +0100 [email protected] (jannsen)
writes:
James Moritz schrieb:

...............

> Several people have resorted to electric heating elements like
> toasters and fan heaters to make satisfactory LF dummy loads.

Hi Jim es all,

here are two dummy loads in use; one is a bulb 110V/DC500W, Z 35 Ohm on 136kHz (bridge measurement) and the other is made of four hollow ceramic resistors 200 Ohm/60W each, makes 200W only. but blowing air through the resistors (see attachment) makes a lukewarm 300W dummy on 136kHz (0,4uH only). I tried 800W. A peace of paper above the dummy caught fire within 10 sec.

regards
Uwe/dj8wx




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