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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
(This post was last modified: 01-31-2017, 04:38 PM by
jmac3ky.)
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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.
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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
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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.
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Ron Ramirez
Ferdinand IN
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Two questions Ron -
Is the conventional clip hookup sufficient? And, is there information published regarding the All-Wave Antenna System?
Thanks, John
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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
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Ron Ramirez
Ferdinand IN
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I saw it sold on eBay few times.
People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.