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[QUOTE=&quot;n2rj, post: 90827, member: 5768&quot;]The 7777 has better specs - slightly higher gain than the 7778 and lower noise. I had one, sold it to a local friend when I replaced it with a research comms (UK) PHEMT LNA. It was a really nice amp but did not play well when there were strong local signals. Fortunately those strong local signals all went away come 02/17/09. The two inputs (one for VHF, one for UHF) are only needed when you have two antennas. If you have only one antenna, there is a switch inside of the preamp that allows you to use a combined input. The documentation that comes with the amp will tell you how to do it.Don't use the rubber boots that come with the preamp. Don't use the connectors either. Use good quality compression connectors and some silicone self fusing tape such as <a href="http://www.rescuetape.com/">Rescue Tape</a> around the connectors. Put a layer of electrical tape over it after that and you will have an installation that will last a very long time.[/QUOTE]

[QUOTE="n2rj, post: 90827, member: 5768"]The 7777 has better specs - slightly higher gain than the 7778 and lower noise. I had one, sold it to a local friend when I replaced it with a research comms (UK) PHEMT LNA. It was a really nice amp but did not play well when there were strong local signals. Fortunately those strong local signals all went away come 02/17/09. The two inputs (one for VHF, one for UHF) are only needed when you have two antennas. If you have only one antenna, there is a switch inside of the preamp that allows you to use a combined input. The documentation that comes with the amp will tell you how to do it. Don't use the rubber boots that come with the preamp. Don't use the connectors either. Use good quality compression connectors and some silicone self fusing tape such as [url=http://www.rescuetape.com/]Rescue Tape[/url] around the connectors. Put a layer of electrical tape over it after that and you will have an installation that will last a very long time.[/QUOTE]

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