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<DIV dir=ltr align=left><SPAN class=976360314-05092005><FONT face=Arial
color=#0000ff size=2>Have to think about this. It's the send and receive
on the same (VHF) band of course that it the fun bit. Unless you have some
cavity filters like the voice repeaters use, it would get "interesting" to say
the least...</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=976360314-05092005><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=976360314-05092005><FONT face=Arial
color=#0000ff size=2>Dave B. G0WBX.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=976360314-05092005><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV><BR>
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<FONT face=Tahoma size=2><B>From:</B> aprssig-bounces@lists.tapr.org
[mailto:aprssig-bounces@lists.tapr.org] <B>On Behalf Of </B>Keith
Kotch<BR><B>Sent:</B> Monday, September 05, 2005 3:00 PM<BR><B>To:</B> 'TAPR
APRS Mailing List'<BR><B>Subject:</B> [aprssig] Duplexer or
Diplexer<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV class=Section1>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">I’m posting this question here
because it pertains to being about to run completely separate APRS system and
voice radio.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Scenario: <st1:PersonName
w:st="on">D</st1:PersonName>ual-band mobile and separate 2m mobile with
tnc. <o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Can a duplexer/diplexer be built
(or is one available) that would allow both radio systems to be hooked up to
one dual-band antenna? The dual-band radios with one antenna lead has a
built-in duplexer. Is that where the problem would occur trying to
coordinate another duplexer?<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">What I’d like to be able to do is
run the dual-band for voice, most likely in cross-band repeat mode on
occasion, while being able to run the APRS/packet radio at the same time being
able to receive on VHF/UHF and VHF packet at the same
time.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">I don’t know if it’s truly a
duplexer/diplexer needed or some way to prevent other radios from getting
fried during transmit of one.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Keith,
KF4BXT<o:p></o:p></SPAN></FONT></P></DIV></BLOCKQUOTE></BODY></HTML>