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HB9ABX > TECH 26.05.07 14:00l 32 Lines 1081 Bytes #999 (0) @ WW
BID : JINFWXHB9EAS
Read: GUEST DL9NDQ OE7FMI
Subj: diplexer and duplexer
Path: DB0FHN<DB0NOE<DB0GAP<DB0FSG<HB9EAS
Sent: 070526/1257z @:HB9EAS.CHE.EU [Basel JN37TM] DP6.00 $:JINFWXHB9EAS
From: HB9ABX @ HB9EAS.CHE.EU (Felix)
To: TECH @ WW
Duplexer - Diplexer:
The names Duplexer and Diplexer are very similar and
frequently confused.
The Duplexer is a device which separates two frequencies
within the same band, while the Diplexer is a device which
separates two different bands. The Duplexer requires much
more selective circuits while the Diplexer normally
requires only simple low pass and high pass circuits.
A DUPLEXER is used in a repeater to separate the
repeater input frequency from the repeater output frequency,
while a DIPLEXER can be used to separate e.g. the 2m band
and the 70cm band.
A diplexer serves, if you want to use the same coax line
to operate two different antennas.
The diplexer at the antenna side separates the cable
to feed the two different antennas, and if you have two
different equipments in the shack you can connect them
through a diplexer to the same coax line.
Schematics and construction guides for diplexers are
found in the Internet with Goggle using this search argument
"diplexer 2m 70cm".
73s
Felix HB9ABX
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