Rick,
A dummy load is something that you connect to a transmitter which you
want to test without using an antenna.
It provides a good 50 ohm resistive load to the transmitter whereas an
antenna feedline impedance can vary all over the place (transmitters are
designed to operate into a 50 ohm resistive load).
When the transmitter is not in use, it is wise to connect the antenna
output to a dummy load - the transmitter will be better protected from
static surges coming in on the antenna feedline - those surges can
damage the transmitter or receiver.
Do not exceed the power rating of the dummy load.
The Elecraft DL1 has a diode detector that allows you to use your DMM to
measure the recified DC voltage and compute the actual power using the
formula in the instruction manual.
Another use of a dummy load is on ATUs that have more than one antenna
port - connect the dummy load to any unused port just in case that ANT
is accidentally selected. You transmitter will be loaded with the
proper load rather than transmitting into an open circuit (that can
damage the transmitter)
73,
Don W3FPR
On 8/19/2013 2:21 PM, Rick Bleda wrote:
I feel like the dummy, but I just bought and put together the DL-1 from
Elecraft, and I have no clue how to use it. Can someone help? I need step
by step instructions: ( lol
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