[Elecraft] Fw: Don't have a 50W dummy load

[Fred Jensen]

Mine works fine at 220, VSWR on 440 is about 1.3:1 and rising fast.  On 
the QRP one I made, I left about 1" leads on the resistors, I had a 
small brass tube to connect the center conductor down to the bottom 
plate and I didn't want to cut it.  VSWR on 6 meters is 1.6:1.

73,

Fred K6DGW
- Northern California Contest Club
- CU in the 50th Running of the Cal QSO Party 3-4 Oct 2015
- www.cqp.org

On 3/25/2015 8:13 PM, Charlie T, K3ICH wrote:
> Yes, but the inductances are all in parallel.  I built a decent dummy
> load out of 24, 1200 Ohm, 10 watt wire wound resistors all in parallel
> between two squares of fiberglass PC board.  The SWR was only about
> 1.2:1 on 15 Meters and about 1.5:1 on 10 meters.   Admittedly, not a
> perfect load, but certainly adequate for the low bands just to soak up
> some RF.
>
> 73, Charlie k3ICH
>>
>> If you're going to use the paralleled metal film resistor construction
>> method, be sure to keep the resistor leads short and spaced them from
>> each other.  Lead inductance will start to become a factor on 6 m and
>> up.  I built mine with 40 2K 2W resistors and it works find at 100W if
>> used intermittently.  It's air cooled.  Don't know how much putting it
>> in oil would improve the dissipation.