"tjbitt" wrote in message
oups.com...
Hi all, my name is Ted (KQ4MZ) and I just came into
posession of a
Drake R4-C receiver which I intend to build a Drake
station from. For
now I just plan to use this as an extra receiver. My
question is how
can I connect a coax to the antenna jack on the back of
the receiver? I
have never owned any older tube gear aside from old swl
radios and have
never seen a phono plug type jack for an antenna. Can I
solder the
center conductor of the coax to the pin on a male phono
plug and the
braid to the body of the plug? Any help would be most
appreciated. I
want to be able to connect the Drake into an antenna
switch that I have
all my other rigs connected to . Thanks again for any and
all
thoughts.


Ted---KQ4MZ

Pomona Plugs and others make adaptors to go from male or
female phone or RCA plugs to BNC or F connectors. The BNC
would probably be the best choice. Since the receiver
antenna connection will probably be going to a TR switch of
some sort you will need a cable with a BNC on the receiver
side and whatever plug the TR switch takes on the other
side. I would use BNC on both sides with another adaptor on
the switch side since you can get adaptors for BNC to nearly
anything. BNCs can be gotten with constant impedance at
either 50 Ohms or 75 Ohms.
Surprizingly, RCA conectors are pretty good at RF, in
fact, that is what they were originally designed for, they
just are not mechanically strong.


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Richard Knoppow
Los Angeles, CA, USA