"Lostgallifreyan" wrote in message
. ..
Does anyone know what the Sangean ATS-909's external antenna input
impedance
is?

I searched for days for documentation on that radio and found plenty,
mods,
schematics, service manuals, reviews, but no straight word on the
impedance
of that input! (Not even in the service manual specs). The only reference
I
found was a from a guy on a 7-page set of ham reviews, and all he said was
that it was a mystery!

Maybe the only way to know is to start from the schematic but I don't know
how, but here's the best schematic I could find:
http://eric.horsemensociety.info/TEC...chematic_A.gif
(Antenna input is near top right).
(Link appears to be dead, 403, forbidden. I'm sure it worked last week..)

What I really want to know is whether the ATS-909 will work ok with a
long(ish) wire outside feeding a 50 ohm coax via a 9:1 transformer, or if
that would cause more bother than connecting a wire directly to it and
putting up with local noise picked up from nearby buildings.

Who cares what the impedance is for that radio. Unless you plan on putting
up an antenna for one very narrow band of frequencies, the impedance of the
system will be all over the place. YOu can probably run coax to the antenna
and never have any problems.