[BC] franklin question (was WSM

[Robert Meuser]

Absolutely,  You could build or re-build one today.


Bailey, Scott wrote:

>Are those still franklins still legal?
>
>-----Original Message-----
>From: broadcast-bounces at radiolists.net
>[mailto:broadcast-bounces at radiolists.net] On Behalf Of Rob Atkinson
>Sent: Friday, September 29, 2006 12:09 PM
>To: broadcast at radiolists.net
>Subject: Re: [BC] franklin question (was WSM
>
>I guess one good thing about the Franklin is that there's no radials to
>rip 
>up and run off with.  I've always wondered how the Franklin is fed.  The
>one 
>in Calif. that's the two tower phased DA is fed with unbalanced open
>wire 
>feed.   At the feedpoints, is this feedline terminated so the center is 
>bonded to one side and the outer wires to the other (as if the Franklin
>is a 
>1 w/l vertical center fed zepp) or are both sides of the feedpoint fed
>with 
>the center wire (like two 1/2 w. end fed zepps with one side of the
>feed, 
>the outside, unterminated)?
>
>thanks,
>
>rob atkinson
>st. charles IL
>
>maybe the copper thefts will result in a return to the days of manned tx
>
>sites.
>
>
>***************************************
>
>I believe this has already been mentioned,  the WSM tower is NOT a  
>Franklin,
>it is slightly less than a 5/8 wavelength tower. Jack DeWitt designed
>it
>originally as a 5/8 wave radiator for maximum ground wave signal.  One
>of 
>the
>anomolies of the 5/8 wave is the amount of radiated signal that  is
>radiated 
>at
>a high angle.  This radiation can end up bouncing the signal  back into
>the
>primary ground wave coverage area.  He made measurements via  air after
>the
>installation and determined that he needed to shorten the towers
>overall 
>length
>to reduce the high angle radiation signal.
>
>The Franklin antennas are essentially a full wave antenna insulated and
>fed
>in the center of the tower. I have been in the tuning house of the WSM
>tower
>and  it is at the base of the tower not located in the middle.  Both WLW
>and
>WSM  are not Franklins.
>
>Gary now that you are in Nashville, get together with Watt Hairston and
>get
>the tour of the site it is impressive and full of history.
>
>
>Dave Hultsman
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