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<blockquote data-quote="jeallen01" data-source="post: 999502" data-attributes="member: 176704"><p>Chris</p><p></p><p>Looks like that should work, but you will still need:</p><p></p><p>- a screened box to mount it in, with SMA (or F-connectors?) on the outside - otherwise there is likely to be a lot external RF noise getting into the amp, because that amp appears likely to be pretty sensitive to (probably) any RF in the vicinity. Also, you should try to make sure that the internal connections to the amp input & from its output are via suitable coax cable, or else there could be crosstalk/feedback between the two.</p><p>- a 5Vdc 100mA supply (best well filtered!) to a 3rd connector - preferably coaxial, not just terminals - on the case of the box to power the amp.</p><p></p><p>Again, the greatest payback will be if the amp is directly connected to end of the antenna, and not at the receiver end of the cable, because of the attenuation resulting from that cable means that the S/N ratio degrades more. That means the psu probably needs to be near there as well.</p><p></p><p>Not sure how much difference that will make overall, compared with the basic sort of amp I used, because the amplification factor below 3GHz is similar in that it is pretty non-linear - much higher gain at 3GHz than below that.</p><p></p><p>Also, making a longer co-linear antenna, with more sections, looks like it would help as well.</p><p></p><p>Overall, I suspect that improving, & then raising, the antenna ,with a simple amp setup, as far as you can would have greater overall effect than trying to squeeze out much more gain using this type of amp - law of diminishing returns.</p></blockquote><p></p>
[QUOTE="jeallen01, post: 999502, member: 176704"] Chris Looks like that should work, but you will still need: - a screened box to mount it in, with SMA (or F-connectors?) on the outside - otherwise there is likely to be a lot external RF noise getting into the amp, because that amp appears likely to be pretty sensitive to (probably) any RF in the vicinity. Also, you should try to make sure that the internal connections to the amp input & from its output are via suitable coax cable, or else there could be crosstalk/feedback between the two. - a 5Vdc 100mA supply (best well filtered!) to a 3rd connector - preferably coaxial, not just terminals - on the case of the box to power the amp. Again, the greatest payback will be if the amp is directly connected to end of the antenna, and not at the receiver end of the cable, because of the attenuation resulting from that cable means that the S/N ratio degrades more. That means the psu probably needs to be near there as well. Not sure how much difference that will make overall, compared with the basic sort of amp I used, because the amplification factor below 3GHz is similar in that it is pretty non-linear - much higher gain at 3GHz than below that. Also, making a longer co-linear antenna, with more sections, looks like it would help as well. Overall, I suspect that improving, & then raising, the antenna ,with a simple amp setup, as far as you can would have greater overall effect than trying to squeeze out much more gain using this type of amp - law of diminishing returns. [/QUOTE]
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