Output duplexers - Revision history

G8GTZ at 09:05, 25 February 2017

2017-02-25T09:05:44Z

2017-01-16T10:27:35Z

2017-01-16T10:20:43Z

2017-01-16T10:17:41Z

Created page with "Standard duplexers and triplexers can be used to provide"

New page

Standard duplexers and triplexers can be used to provide

← Older revision		Revision as of 09:05, 25 February 2017
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		+	Rather than use a lossy expensive RF relay on the output of the DATV transmitter we can use a duplexer (for just 146 and 437 MHz operation) or a triplexer (for 146, 437 and 23cms operation) filter - as well as providing automatic band switching the duplexer (or triplexer) provides some bandpass filtering on the transmitter output!
		+
		+	[[File:tx filter 1.JPG\|600px]]

−	Rather than use a lossy expensive RF relay on the output of the DATV transmitter we can use a duplexer (for just 146 and 437 MHz operation) or a triplexer filter - as well as providing automatic band switching the duplexer (or triplexer) provides some bandpass filtering on the transmitter output!

	The duplexr / triplexer can be a standard unit as we all use to run a dual band VHF / UHF rig in to a dual band antennae up one co-ax or they are very simple and cheap to build - links and circuits are available on these pages:		The duplexr / triplexer can be a standard unit as we all use to run a dual band VHF / UHF rig in to a dual band antennae up one co-ax or they are very simple and cheap to build - links and circuits are available on these pages:

@@ Line 2: / Line 2: @@
 Rather than use a lossy expensive RF relay on the output of the DATV transmitter we can use a duplexer (for just 146 and 437 MHz operation) or a triplexer filter - as well as providing automatic band switching the duplexer (or triplexer) provides some bandpass filtering on the transmitter output!
-The duplexr / triplexer can be a standard unit as we all use to run a dual band VHF / UHF rig in to a dual band antennae up one co-ax or they are very simple and cheap to build - links and circuits are available on this page:
+The duplexr / triplexer can be a standard unit as we all use to run a dual band VHF / UHF rig in to a dual band antennae up one co-ax or they are very simple and cheap to build - links and circuits are available on these pages:
-* [http://www.i1wqrlinkradio.com/antype/duplex.html I1WQR's page] has several links to easily constructed duplexer designs - including one by Tony G3KTU.
+*[http://www.i1wqrlinkradio.com/antype/duplex.html I1WQR's page] has several links to easily constructed duplexer designs - including one by Tony G3KTU.

← Older revision		Revision as of 10:20, 16 January 2017
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−	~~Standard duplexers~~ and ~~triplexers~~ can be ~~used~~ to ~~provide~~	+
		+	Rather than use a lossy expensive RF relay on the output of the DATV transmitter we can use a duplexer (for just 146 and 437 MHz operation) or a triplexer filter - as well as providing automatic band switching the duplexer (or triplexer) provides some bandpass filtering on the transmitter output!
		+
		+	The duplexr / triplexer can be a standard unit as we all use to run a dual band VHF / UHF rig in to a dual band antennae up one co-ax or they are very simple and cheap to build - links and circuits are available on this page:
		+
		+	* [http://www.i1wqrlinkradio.com/antype/duplex.html I1WQR's page] has several links to easily constructed duplexer designs - including one by Tony G3KTU.