There are two places for external antenna leads on my Philco 116B. It has antenna clips (ant and grd) above the chassis. It also has screws on a small panel on the vertical back of the chassis with the same abbreviations. My data sheets don't explain the difference. So, I'm turning to the Phorum brain trust. Anyone?
http://www.nostalgiaair.org/pagesbymodel...013122.pdf
Found a similar radio with the same setup. A label beneath the screws on the back said, TO GET ALL OF THE PERFORMANCE WHICH IS BUILT IN THIS PHILCO, CONNECT AERIAL TRANSMISSION LINE HERE.
I take it that a special "Aerial Transmission" antenna was available through Philco.
Impedance wise it's similar to the old flat tv ant wire more commonly know as 300 ohm twin lead.
http://rsgb.org/main/files/2012/10/Dipole_fig31.jpg
The feeder is the twin lead going vertical. the horizontal portion are the elements cut to the wavelength or a fraction of the wavelength. A full length ant for the bcb is abt 300 meters (abt 900') long. This just element (horizontal portion).
In practicality 60-100 works well as high up as you can get it.
Here's the deal.
The Fahnestock clips are for a conventional longwire antenna and ground lead.
The screw terminals were intended for use with Philco's All-Wave Antenna System. Using the screw terminals eliminated the need for a balun. The impedance of the screw terminal input is as Terry said...but don't try to use an old TV antenna in place of the Philco All-Wave Antenna as it won't pick up very much signal.
Two questions Ron -
Is the conventional clip hookup sufficient? And, is there information published regarding the All-Wave Antenna System?
Thanks, John
I saw it sold on eBay few times.