Ladies & Gentlemen
By popular demand and for your amusement I present to you the NEW KLAS TOWER FEED !!
The adding of the TWR feed presented me with a new challenge how do I run 2 feeds on a very old win98 PC at the same time? well the sad truth is the old PC was to slow to run the 2 scanners at the same time:-(
So the old aging XP PC was doomed to hosting the feeds but o-well it was fate after all
Here is the major overhaul comparisons
OLD FEED SETUP
PC: P11 300Mhz
Feed Software: STWin v4
Antenna: Homebrew 1/4 Wave Ground Plane
Coax: 50ft 75ohm RG59 (TV Cable)
Splitter: 2 way (TV TYPE)
NEW FEED SETUP
PC: P111 1.0 GHz
Ram: 1024 MB
Feed Software: STWin v4 X2
Radio: PCR100 X2 one running PCR100 software and the other PCR1000
Antenna: Custom tuned 5/8 wave (LARSEN SUPER BASE)
Coax: 50ft 50ohm Belden 9913
Splitter: Active Receiver Multicoupler MCA204M (STRIDSBERG ENGINEERING)
OLD TWR receiver signal strength
S-2 to S-5 NEW S-6 to S-9
OLD APP/DEP receiver signal strength
S-4 to S-6 NEW S-6 to S-8
Airborne planes much higher then that !
So about a gain of 2 to 4 S-Units WOW what a huge improvement ! The most notasble improvements was at the antenna of course espashally on the low end of the band do to the fact that its cut to 118 to 121 MHZ however it still shows a db gain over a 1/4 wave, above 121MHz Now as for the coax there was a small amount of gain by switching to the much better 9913 and to my surprise there was about a 4 db gain when I inserted the 4 way Active Multicoupler however this came at a price as the noise on 118.75 went up so I had to ATT the SIG by 20 db to drop the noise on that Frq (unknown where its coming from) maybe power lines? but O-well at least I can receive it now.
I would like to thank all of the those who offered to donate gear and there time to setup the feed very much appreciated thank you
Well there you go the new KLAS FEED enjoy !
Glenn KB6HLM Las Vegas, NV