K7YO 1296 Mhz

1.2 Ghz station equipment:

• Yaesu FT-736R with 1296 module, 10 watts output
• Twin Directive Systems 2324LYRM loop yagi array
• Antennas are 24 rings along 72", 18.5 dbi, 27' beamwidth,  + 3 db stacking gain
• 30 feet of 1/2" Superflex  feedline to the rooftop antenna. 
• Not finished: 0.7db GasFET preamp; twin 2C39 amplifier; 10' TVRO dish antenna

The 24 ring looper yagi array fed in phase with an odd 1/4 wavelength of 1/4" Superflex 75 ohm.coax. 

The 0.7 db DEMI preamp lashup on the floor behind the rig.  This is going up at the antenna soon, with a plastic bucket over the top.  The FT-736 really needs this kind of gain to hear the weak ones.  And they are ALL weak ones on 1296.1 Mhz!

The twin tube 2C39, water-cooled, 1296 amp that I hope to get going someday or sooner.  Got spare tubes, anyway!

A coffee can waveguide antenna I built for 1296 Mhz.  This works and matches well; probably at least 10 dbi gain.  I plan to mount it inside a 10 foot TVRO dish.

Microwave Links

Quadrifilar Helix Antenna theory
 Wi Fi cantenna design