I have seen on ebay (I believe Henry Radio is the vendor) some pretty high
wattage loads
(I believe at one time they sold a set of 4 200ohm ones to mount to a big heat
sink.)
If I were going to run a tube amp again I'd be tempted to make up a high
wattage dummy load for it.
From: Clay Autery <caut...@montac.com>
To: elecraft@mailman.qth.net
Sent: Tuesday, December 27, 2016 7:16 PM
Subject: Re: [Elecraft] Dummy loads for dummies
Makes me curious about designing with these TO-220 resistors in the 1000
Ohm size of appropriate power rating... Parallel 20 of them like folks
do on the axials that they put in the can type dummy loads with oil.
Options:
1) 20 in parallel on a finned copper or bare aluminum sink of sufficient
size and then entire assembly in a oil wetted container.
2) Same, but only the finned side of the finned/pinned heat exchanger in
a coolant bath.
I'd like to have a rugged, high power, key down load built from easily
obtainable and replaceable parts.
______________________
Clay Autery, KY5G
MONTAC Enterprises
(318) 518-1389
On 12/27/2016 5:52 PM, Mel Farrer via Elecraft wrote:
> One thing I might also add in. I use the Film TO-220 style non-inductive
> resistors with a heat sink in the 200 ohm 1% configuration to test 4:1 baluns
> at 100 watt level to confirm non saturation on the small QRP baluns I make.
> Mel, K6KBE
>
>
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