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Well; I wouldn't want anyone to lose their family jewels over this project. Least of all me - either. There are many considerations for doing a project like this. Having radio club members to share the responsibility would help. Including the cost. But for building an inexpensive emergency repeater, one needs to get inventive.

Since the need for a cavity duplexer has been defined in the previous posts ('desensing'), to find and incorporate a duplexer becomes a necessity.

On eBay, I found a duplexer (new) for a mobile radio equipped with N-connectors. But it should provide the same function at a fairly reasonable cost . Making a mobile repeater would also allow for the power supply part of the repeater to be dealt with. Making it mobile means that one can drive up to the nearest mountain/hilltop and make this possible repeater station effective in an emergency situation too.

Perhaps using this unit can lower the cost somewhat?
Here is the VHF duplexer, capable of handling a 50w power output - for $!00:
eBay - New & used electronics, cars, apparel, collectibles, sporting goods & more at low prices

<blockquote data-quote="Robb" data-source="post: 361734" data-attributes="member: 8446">Well; I wouldn&#039;t want anyone to lose their family jewels over this project.&nbsp; Least of all me - either.&nbsp; There are many considerations for doing a project like this.&nbsp; Having radio club members to share the responsibility would help.&nbsp; Including the cost.&nbsp; But for building an inexpensive emergency repeater, one needs to get inventive.Since the need for a cavity duplexer has been defined in the previous posts (&#039;desensing&#039;), to find and incorporate a duplexer becomes a necessity.On eBay, I found a duplexer (new) for a mobile radio equipped with N-connectors.&nbsp; But it should provide the same function at a fairly reasonable cost .&nbsp; Making a mobile repeater would also allow for the power supply part of the repeater to be dealt with.&nbsp; Making it mobile means that one can drive up to the nearest mountain/hilltop and make this possible repeater station effective in an emergency situation too.&nbsp; Perhaps using this unit can lower the cost somewhat?Here is the VHF duplexer, capable of handling a 50w power output - for $!00:<a href="http://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_ff3=2&amp;toolid=10001&amp;campid=5336136228&amp;icep_item=370480308578" target="_blank">eBay - New &amp; used electronics, cars, apparel, collectibles, sporting goods &amp; more at low prices</a></blockquote>

[QUOTE="Robb, post: 361734, member: 8446"] Well; I wouldn't want anyone to lose their family jewels over this project. Least of all me - either. There are many considerations for doing a project like this. Having radio club members to share the responsibility would help. Including the cost. But for building an inexpensive emergency repeater, one needs to get inventive. Since the need for a cavity duplexer has been defined in the previous posts ('desensing'), to find and incorporate a duplexer becomes a necessity. On eBay, I found a duplexer (new) for a mobile radio equipped with N-connectors. But it should provide the same function at a fairly reasonable cost . Making a mobile repeater would also allow for the power supply part of the repeater to be dealt with. Making it mobile means that one can drive up to the nearest mountain/hilltop and make this possible repeater station effective in an emergency situation too. Perhaps using this unit can lower the cost somewhat? Here is the VHF duplexer, capable of handling a 50w power output - for $!00: [url=http://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_ff3=2&toolid=10001&campid=5336136228&icep_item=370480308578]eBay - New & used electronics, cars, apparel, collectibles, sporting goods & more at low prices[/url] [/QUOTE]

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