G4BAO.COMMicrowave Amateur Radio Station, Waterbeach. 8km North Of Cambridge JO02cg | ||||||||||||||||||||||||||||||||
To Contact me: Skype johng4bao E-mail john at g4bao dot com QTHR |
ProjectsA 34Watt 3400 MHz PA using Surplus Ionica units. - Part 4 Connecting up the RF modules The RF modules, two combiners, four isolators and two PAs should be connected up using high quality semi rigid SMA leads. These are available surplus via EBay and other sources.
The same applies to the leads between the PA
outputs/isolators and the combiner. Heatsinking The amplifiers need some serious heat sinking, as the whole unit takes 3.2 Amps at 48V or 154 Watts for 34 Watts out. I probably overdid the heat sinking and fitted 3 small fans as well, but my unit barely gets warm. Some test at 3400MHz Hybrid combiners
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Output Power for 2mW in to combiner: PA1 19Watts, PA2 19Watts Combined Output 34 Watts | ||||||||||||||||||||||||||||||
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