Mark,
If I may throw my two cents into this.
I would not run the power into the cavities more than they are rated for.
You could be really looking for problems down the road as Eric said. Look at
it this way. You can buy many different tires for say a Corvette. Some of
the may be only
At 2/8/2006 19:55, you wrote:
Another viewpoint.
The rating of the cavities by be what you can inject into the duplex system
and still maintain the isolation rating. You may not harm the cavities but I
still stick with what I said earlier. Drop the power to 100 Watts. This or
I once tried
Here's a thought -- if you put a isolator between the PA and
the duplexer,
and a isolator between the duplexer and the antenna, wouldn't your
duplexer see a near perfect 50 ohms at all times?
The isolator in the output of the duplexer would have to
replace the output
TEE - else you
You do get a 20dB improvement of isolation, this may help if you only have a 4 cavity duplexer.On 2/9/06, Jeff DePolo WN3A
[EMAIL PROTECTED] wrote: Here's a thought -- if you put a isolator between the PA and
the duplexer, and a isolator between the duplexer and the antenna, wouldn't your
. If you
want real performance the 2 antenna way works well, assuming reasonable
antenna separation on the tower.
Jack
K6YC
- Original Message -
From: Kris Kirby [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Tuesday, February 07, 2006 11:15 PM
Subject: Re: [Repeater-Builder
Wouldn't it be fair to say that a notch duplexer rejects only the
'opposite' frequency in the system while a BandReject duplexer rejects
ANYTHING other than the pass frequency? (within the limits of the
notches)
So, a BandReject duplexer will help eliminating mixing products, while a
Notch
Sent: Wednesday, February 08, 2006 1:16 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Duplexer questions
On Wed, 8 Feb 2006, N9WYS wrote:
running about 50W with the old PA. (BTW - There is an isolator between
the duplexer and the PA.) Will this cause me any grief either
@yahoogroups.com
Subject: Re: [Repeater-Builder] Duplexer questions
Wouldn't it be fair to say that a notch duplexer rejects only the
'opposite' frequency in the system while a BandReject duplexer rejects
--
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Checked by AVG Free Edition.
Version: 7.1.375 / Virus
Wouldn't it be fair to say that a notch duplexer rejects only the
'opposite' frequency in the system while a BandReject duplexer rejects
ANYTHING other than the pass frequency?
Umm, a filter that rejects ANYTHING other than the pass frequency is a
bandpass filter!
--
No virus found in
Mark,
Bandpass/Bandreject, also known by the short name "BpBr" is the same as a
Bandpass/Notch duplexer.
The names are somewhat misleading, because the bandpass effect is
relatively modest, although the notch is quite sharp. It is a good idea to
have a pure bandpass cavity or two between
: Wednesday, February 08, 2006 7:56 PMTo:
Repeater-Builder@yahoogroups.comSubject: RE: [Repeater-Builder]
Duplexer questions
Mark,
Bandpass/Bandreject, also known by the short name "BpBr" is the same as a
Bandpass/Notch duplexer.
The names are somewhat misleading, because the bandp
2006 7:02 PMTo:
Repeater-Builder@yahoogroups.comSubject: RE: [Repeater-Builder]
Duplexer questions
Hi, Eric.
Thanks for the insight... I plan on adding a voting
receiver system to the machine; in fact, I'm currently working on two of the
remotes as I write. (Well, sorta... hehe) I have a Motoro
Mark - N9WYS
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of Eric
LemmonSent: Wednesday, February 08, 2006 9:55 PMTo:
Repeater-Builder@yahoogroups.comSubject: RE: [Repeater-Builder]
Duplexer questions
Mark,
The problem with exceeding the power rating of your
Can someone please explain what the difference is between a
BandPass/BandReject duplexer and a BandPass/Notch duplexer?
In our little two-way radio world, the answer is that there is no
difference.
Technically speaking, a notch is very narrow, targeting only a specific
frequency. A
On Wed, 8 Feb 2006, N9WYS wrote:
running about 50W with the old PA. (BTW - There is an isolator between
the duplexer and the PA.) Will this cause me any grief either now or
Here's a thought -- if you put a isolator between the PA and the duplexer,
and a isolator between the duplexer and
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