I am considering purchasing the following items from Ramsey Electronics for use with the USRP and would like some feedback regarding whether they are compatible. I figure there are probably folks here that have either used these items or have at least considered them at some point.
The first item is a pre-amplifier: http://www.ramseyelectronics.com/cgi-bin/commerce.exe?preadd=action&key=PR-S ERIES My main concern is I don't want to blow out the front end of the USRP. The other item is a power amplifier: http://www.ramseyelectronics.com/cgi-bin/commerce.exe?preadd=action&key=LPA1 Presently I am planning on using the VERT400 antenna that was purchased along with the USRP. Does anyone know how much power I can dump into it safely? I would like to use a better antenna subject to needing to stay omnidirectional and being limited to a length of less than 18". Any suggestions? I'm assuming that I can use the TX/RX output of the Flex400 to drive the RF amp and one antenna and use a second antenna feeding the pre-amp and then the RX input of the same Flex400 board. Does this sound reasonable, or am I overlooking something? I am cleared to transmit with up to 100W of power centered at 447MHz with up to 20MHz of signal bandwidth. While I would love to at least get up to 10W, it looks like my beer budget is more along the lines of 1W. Does anyone know how to get into the 5W or higher range for under $250 each? I need a pretty lightweight DC-powered amplifier as this will be mounted in an RC airplane. TIA
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