Greetings.

I have a question concerning putting in a matching transformer.

I bought a cheapie 75 Ohm to 300 Ohm Matching Transformer from RS. (part
#15-1253)

My "new" antenna is 80 foot of speaker wire with the 2 leads taped and
soldered at one end.

I was told in an earlier thred that I have to connect the end leads to the
300 Ohm side of the transformer.

My question is do I attach both leads to one screw, or one lead to each
screw.

I have already opened it up and soldered a ground lead to the "gripper"
portion of the coax side.

Thanks again for all of your help. You guys are great!
Well at least some of you. The rest I heard bad things about! ;-)

Ant

ASW wrote:

Greetings.

I have a question concerning putting in a matching transformer.

I bought a cheapie 75 Ohm to 300 Ohm Matching Transformer from RS. (part
#15-1253)

My "new" antenna is 80 foot of speaker wire with the 2 leads taped and
soldered at one end.

I was told in an earlier thred that I have to connect the end leads to the
300 Ohm side of the transformer.

My question is do I attach both leads to one screw, or one lead to each
screw.

I have already opened it up and soldered a ground lead to the "gripper"
portion of the coax side.

Thanks again for all of your help. You guys are great!
Well at least some of you. The rest I heard bad things about! ;-)

Ant

Although you used a two conductor speaker wire, it should be considered
one wire for the purpose of a shortwave antenna, especially since one
end has been connected together. In that case, connect the wires of the
other end together too. Now you have one antenna wire which is made of
two conductors connected together on each end. BTW- The RS shortwave
antenna kit has a single bare copper wire for the antenna instead of
your two conductor speaker wire (connected together). It's hard to say
which is stronger.
Look inside the balun to see if one of the screws on the 300-ohm side is
connected to the coax shield ("gripper") on the 75-ohm side. If not,
make that connection by soldering a short wire. The antenna wire now
connects to the other screw which is not connected to the coax shield or
'gripper' as you call it. If you also have a seperate ground wire,
connect it to the coax shield (gripper). Run some coax from the balun to
the radio. Be sure to use an insulator at each end of the antenna wire
(outside) in case the speaker wire insulation wears off because of aging
or wear.


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