Americana "last gasp" AM only transistor radio

[ctc17]

Originally Posted by jr_tech

Many full power FM stations now use circular polarization, in an attempt to provide a better signal to automobile radios and table radios that use "line cord" antennas, so orientation of the line cord or headphone cord in this case, may not be as critical as it once was.

According to the FCC website, KNX still transmits at 50KW.

http://www.fcc.gov/fcc-bin/amq?list=0&facid=9616

Perhaps their ground system has degraded over the years?

jr

Interesting, the antennas for KNX are located in a public park where all the local soccer teams meet. Its says the phase angle is 0 so I wonder if their just broadcasting omni.
Interesting stuff.

[jr_tech]

Originally Posted by ctc17

Interesting, the antennas for KNX are located in a public park where all the local soccer teams meet. Its says the phase angle is 0 so I wonder if their just broadcasting omni.

I appears that they are only using one tower, so it would be non directional (ND-1 is shown). If you check the "ASRNs within .5 km" list, it appears that there are 2 nearby towers that are owned by CBS, perhaps these were used at one time to provide a different pattern day- to -night.

jr

Update... Scott Fybush to the Rescue....He says that in the late 50s CBS experimented with a directional array...but it did not work out:

http://www.fybush.com/site-020313.html