[Amps] Dummy Load Blues

[Rob Atkinson]

Those are very expensive.

Go look around on-line or at hamfests for carborundum resistors.  Try
to find four around 200 ohms each.  If they are around 18 inches long
or so and 1 inch diameter each will dissipate 200 watts, perhaps more
in air.  parallel them with some hardware; mount them in a container
or in a metal frame with a UHF jack wired across them and with a fan
on them you have a pretty good ham DL for most ham amps.  in a tub of
oil they'll probably handle quite a bit more power.   There are other
methods:  get some of the old light bulb socket ceramic cone heaters,
the ones with resistance wire wound on them and mount them in
porcelain sockets on a board and wire them up -- I'd try them
paralleled first; you can experiment with clip leads -- and use a
tuner to match them to 50 ohms.

73

Rob
K5UJ

On Thu, Jun 14, 2012 at 6:18 PM, Jim Barber <audioguy at q.com> wrote:
> These make it easy:
>
> http://www.ebay.com/itm/4-ea-800-Watt-Hybrid-200-ohm-Load-Resistor-500-mHz-/370454666736?pt=LH_DefaultDomain_0&hash=item5640d19df0#ht_734wt_1396
> <http://www.ebay.com/itm/4-ea-800-Watt-Hybrid-200-ohm-Load-Resistor-500-mHz-/370454666736?pt=LH_DefaultDomain_0&hash=item5640d19df0#ht_734wt_1396>
>
> And no, I'm not shilling for Henry Radio. I just buy RF parts from them
> here and there. :-)
>
> 73,
> Jim N7CXI
>
>