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Antenna Leads 116B
01-31-2017, 03:05 PM
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
01-31-2017, 04:30 PM
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.
01-31-2017, 06:45 PM
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. When my pals were reading comic books I was down in the basement in my dad's workshop. Perusing his Sam's Photofoacts Vol 1-50 admiring the old set and trying to figure out what all those squiggly meant. Circa 1966 Now I think I've got! Terry 
01-31-2017, 07:44 PM
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. -- Ron Ramirez Ferdinand IN
01-31-2017, 08:57 PM
Two questions Ron -
Is the conventional clip hookup sufficient? And, is there information published regarding the All-Wave Antenna System? Thanks, John
01-31-2017, 09:34 PM
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/showth...p?tid=3967 -- Ron Ramirez Ferdinand IN
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