The PHILCO Phorum
Antenna Leads 116B - Printable Version

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Antenna Leads 116B - jmac3ky - 01-31-2017

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/122/M0013122.pdf

RE: Antenna Leads 116B - jmac3ky - 01-31-2017

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.

RE: Antenna Leads 116B - Radioroslyn - 01-31-2017

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.

RE: Antenna Leads 116B - Ron Ramirez - 01-31-2017

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.

RE: Antenna Leads 116B - jmac3ky - 01-31-2017

Two questions Ron -

Is the conventional clip hookup sufficient? And, is there information published regarding the All-Wave Antenna System?

Thanks, John

RE: Antenna Leads 116B - Ron Ramirez - 01-31-2017

Yes, the conventional clip hookup is quite sufficient.

As for the All-Wave Antenna, its 1937-38 equivalent, the High Efficiency Aerial, is mentioned on Chuck's site:
http://www.philcorepairbench.com/mystery/40-6112.htm

There was a thread here in the Phorum on this subject back in 2011:
http://www.philcoradio.com/phorum/showthread.php?tid=3967

RE: Antenna Leads 116B - morzh - 01-31-2017

I saw it sold on eBay few times.