Mike Besemer (WM4B) wrote:
And as a follow up to my first question, as I understand it… there
should be no problem with swapping the TX and RX cans (and retuning
them), correct?
That's correct for the DB4060 since the cans, coupling loops and
notch capacitors are all the same.
But it's
-Builder@yahoogroups.com [mailto:Repeater-
[EMAIL PROTECTED] On Behalf Of Paul N1BUG
Sent: Monday, October 06, 2008 7:11 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] RE: DB4060 Duplexer Cables
Mike Besemer (WM4B) wrote:
And as a follow up to my first question, as I
Skip's comment is right on the mark. I was tuning several old Sinclair Q202G
VHF duplexers a couple of years ago and when I pulled a couple of cavities
apart to see the difference between the low pass side and the high pass side, I
found none. They were exactly the same.
Turned out that the
Mike,
Not necessarily! Some duplexers are asymmetrical, meaning that one side
is intended for pass low and notch high, while the other is for pass high
and notch low. When the manufacturer puts TX and RX labels on the
connectors, it leads some folk to invert the tuning- often leading to grief.
_
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of Eric Lemmon
Sent: Sunday, October 05, 2008 10:25 PM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] RE: DB4060 Duplexer Cables
Mike,
Not necessarily! Some duplexers are asymmetrical
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