BELOW SHOWS THE TESTED
RESULTS OF THE PROTOTYPE KITS
The EME139 Board can be used for various applications
up to 2500MHz. The board can easily be cut by 2mm along either
side with a bench grinder to raise the filters frequency to 2400MHz.
All the test results below were very consistent between Prototype
boards with no tuning required to peak output power. Some improvements
can probably be made around the ERA3 Multiplier stage to improve
efficiency, & achieve more output power, but we didn't think
that it was worth the effort for a couple dB more gain.
CONSTRUCTION
IMAGES OF THE PROTOTYPE KIT
ABOVE IMAGE SHOWS 1MM DIFFERENCE
BETWEEN THE BOTTOM OF THE PCB &
THE EDGE OF THE STRIP AROUND THE BOARD. EME139
KIT3
ABOVE IMAGE IS OF
BOARD 1 WITH THE ERA AMPLIFIERS
ABOVE IMAGE IS OF
BOARD 2 SHOWING THE BRIDGING ACROSS THE STRIPLINES
& HOW THE 9 VOLT REGULATOR & CAPACITORS
ARE MOUNTED
ABOVE IMAGE SHOWS
BOTH BOARDS READY TO BE CONNECTED TOGETHER.
NOTE THE THIN WIRE CONNECTING THE +12 VOLT PCB
PINS TOGETHER.
ABOVE SHOWS BOTH
BOARDS WITH TINPLATE SIDES & HOW THE PCB PINS
ARE KEPT LONG TO CONNECT BOTH BOARDS TOGETHER
Sunday
17th may 09 