|[AMRadio] Dummy Load|
Foltarz at rocketmail.com
Tue May 2 09:44:39 EDT 2006
Resistor bank out of a Gates 1T comes to mind.
An oil bath would certainly give the extra thermal mass to go the distance for
checking a 3 KW output.
--- "Todd, KA1KAQ" <ka1kaq at gmail.com> wrote:
> On 5/1/06, Rick Brashear <rickbras at airmail.net> wrote:
> > Does anyone have a nice hefty dummy load capable of 2kw - 3kw they would
> > like to sell or trade? I need something capable of handling a 1000
> > watt carrier for more than a few seconds.
> I'd suggest checking with the guys who know of, or are parting out
> some of the big old AM transmitters. Gates and probably others used to
> have a built-in dummy load consisting of a large board or panel
> covered with hefty non-inductive resistors. Even a 1KW version would
> probably work alright for 2-3KW if you added some forced air cooling
> by fan - provided you don't plan on leaving it keyed up for a long
> period of time. I have one here that is rebuilt into a metal
> enclosure, and actually managed to get it warm for the first time this
> past weekend when W1UJR was over at my place helping to get things in
> order. We were dumping a KW-input rig (750w or so) into it for
> extended periods, and it handled it fine with no help from a fan.
> de Todd/'Boomer' KA1KAQ
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