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Antenna Leads 116B
jmac3ky
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#1

01-31-2017, 04:05 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
(This post was last modified: 01-31-2017, 04:38 PM by jmac3ky.)
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jmac3ky
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#2

01-31-2017, 05:30 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.
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Radioroslyn
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#3

01-31-2017, 07:45 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.
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Ron Ramirez
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#4

01-31-2017, 08:44 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.
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Ron Ramirez
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jmac3ky
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#5

01-31-2017, 09:57 PM
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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Ron Ramirez
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#6

01-31-2017, 10:34 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
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morzh
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#7

01-31-2017, 11:21 PM
I saw it sold on eBay few times.
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  1. The PHILCO Phorum
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