[Elecraft] EFHW

[donovanf at starpower.net]

There are excellent photos and a description of the KFBK Franklin array here: 



https://www.fybush.com/sites/2005/site-051028.html 


73 
Frank 
W3LPL 

----- Original Message -----

From: "Fred Jensen" <k6dgw at foothill.net> 
To: elecraft at mailman.qth.net 
Sent: Monday, February 13, 2017 3:56:33 AM 
Subject: Re: [Elecraft] EFHW 

KFBK in Sacramento uses [or used, my info is a few years old] a 
center-fed half-wave vertical ["Franklin"] antenna, said to be the only 
one left. It's ... interesting. [:-) KFBK is also the originator of 
the first out-phasing BC TX which became the RCA Ampliphase [or 
Amplifuzz if you ever had to get one to pass PoP]. KFBK is also the 
radio birthplace of Rush, "Bloviator in Chief," although that's probably 
far less important than the Franklin. There was a radial field under 
the Franklin, it may have rusted into oblivion by now, I'm not sure it 
was all that important, it's located in the flood plain north of 
Sacramento ... moderately wet, they grow rice in the area. 

73, 

Fred ["Skip"] K6DGW 
Sparks NV DM09dn 
Washoe County 

On 2/12/2017 5:31 PM, Jim Brown wrote: 
> Not true, Ron. Most AM broadcast transmitting antennas are in the 
> range of 80-90 electrical degrees (a quarter wave). Nearly all of the 
> Class I clear channel stations use antennas that are at least 180 
> electrical degrees. You can see this data for any US station at 
> 
> https://www.fcc.gov/media/radio/am-query 
> 
> WLW's tower is 189.3 degrees. So is WLS. WGN is 195 degrees. WBZ 
> uses an array of four towers that are 188.5 degrees. WIND on 560 kHz 
> near Chicago, has an array of four 100 degree towers. The station 
> where I worked in my home town has an array of four 82 degree towers. 
> And so on. 
> 
> 73, Jim K9YC 
> 
> On Sun,2/12/2017 9:13 AM, Ron D'Eau Claire wrote: 
>> Most BCB (0.5 to 1.6 MHz) antennas are 1/8 wavelength high (or less) 
>> which necessitates an extensive ground system. 
> 
> 
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