On Dec 5, 7:58*am, NB1R wrote:
I've got a nifty little Grundig G6 Aviator radio and I want to build
an active antenna to plug into the antenna jack. *This radio, like
many new portable SW sets, has the 1/8" mono jack for antenna
output.

Can anyone tell me which contact is for the antenna? *The tip or the
shaft? (Heh-heh...tip... shaft). *Is the other contact the ground? *In
the old days the desktop rigs either had a PL259 or a terminal strip
for hooking up an antenna.

Thanks,
Good DX/SWL

James
NB1R
Lexington MA

NB1R,

Grundig G6 Aviator Radio
http://www.amazon.com/gp/product/images/B0018QQDII/
* Page 16 - Antenna Input is for 50~75 Ohms
http://www.etoncorp.com/upload/conte...010308_low.pdf

Check the Negative {Outer-Ring} of the DC Input
to the Outer-Ring of the Headphone Jack for
Continuity {Ground ?}.

Check the Outer-Ring of the Antenna Jack Input
to the Outer-Ring of the Headphone Jack for
Continuity {Ground ?}.

97.531% 'sure' that the "Tip" is the Antenna
{Hook-Up} Connection and the Outer-Ring
{Barrel} is the Ground Connection
-or- was that 86.420% certain . . .

Use a 1/8" {3.5mm} Plug Quick TV Antenna Adapter
with a Long Wire Antenna and Ground 'connected'
to the Screw Terminals and Plug-It-In as needed.
http://www.amazon.com/dp/B001JT3MNS

Alternative use a PWA -or- Tune-a-Stick Antennas

Tune-A-Stick -and- Portable Wire Antenna (PWA)
for Whip Antenna Couplers to External Shortwave
Listener (SWL) Antennas
http://groups.google.com/group/rec.r...c73c4c94625fc7
http://groups.google.com/group/rec.r...a610e444b71ebd

SWL -Newbies-
So Your 'portable' AM/FM Shortwave Radio
Needs an External Antenna for Better Reception
http://groups.google.com/group/rec.r...4fd1bafbc1ccf5
http://groups.google.com/group/rec.r...91ac1debee8e66