On 8/18/12 6:23 PM, J. L. Trantham wrote:
I use one like this (theBay item 270881742870) and it works well in NW Florida under some trees. I could get better performance if I had it up higher but it serves my purposes. There are also ones with higher gain out there as well, up to about 40 dB IIRC.
Yeah, but gain isn't a big deal. It's designed to overcome the loss of the transmission line to the receiver. What's important is the noise figure of the LNA, more than the gain. Most receivers have a 1 bit quantizer, so all you really care is that the signal from the antenna is big enough that the "antenna noise" dominates over the receiver noise. If I had to guess, I'd say that as long as the antenna/preamp gain is more than the loss in the cable (and power dividers, etc.) by some few dB, you're fine.
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