Bob [K5QWG],

External Antenna Input for most 'portable' AM / FM Shortwave Radios
with 1/8" Mono Jack
http://groups.yahoo.com/group/Shortw...sage/10074?l=1

Most Sangean 'portable' AM / FM Shortwave Radios
simply use a 1/8" Mono Jack for the External Antenna
Input. As do many 'portable' AM / FM Shortwave Radios.
* Barrel Circuit-Board-Ground (RF Signal Ground)
* Tip Antenna RF Signal Input

However, the Sangean ATS-909 'portable' AM / FM
Shortwave Radio uses a 1/8" Stereo Jack for the External
Antenna Input.
* Barrel Circuit-Board-Ground (RF Signal Ground)
* Tip Shortwave Antenna RF Signal Input
* Middle-Ring AM/MW Antenna RF Signal Input

Caution - Do Not - Plug your External Antenna into the
Headphone / External Speaker Jack (1/8') -and- Do Not -
Plug your Headphone / External Speaker into the External
Antenna Jack (1/8") - It's easy to do sometimes and
strangly the Radio does not work to well.
- - - Oops - Been There - Done That ! )

Two -IFs- when using an External Antenna with a
'portable' AM / FM Shortwave Radio :

IF # 1 - When Using In-Door External Antenna with
a 'portable' AM / FM Shortwave Radio - A Ground
{Wire} connection may not be required - Although
connecting a Ground may help reduce the Noise
{ Try It and See }

IF # 2 - When Using Out-Side External Antenna with
a 'portable' AM / FM Shortwave Radio - A Ground
{Wire} connection is Required for Electrical Safety.
Usually a Ground connection will help reduce the
Noise when using and Out-Side External Antenna.
{ Do It and See }


hope this helps - iane ~ RHF
..
Shortwave Listener Antennas = http://tinyurl.com/ogvcf
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
SWL Antenna Group = http://tinyurl.com/ogvcf