> That is true for band pass filters but in the case of a
> duplexer the filters are usually notch type (or pass/notch).
In some but not all cases. I have a few shelves full of
band-pass only mode duplexers and they have their very
useful applications.
> So the more notch type cans there ar
That is true for band pass filters but in the case of a duplexer the filters
are usually notch type (or pass/notch). So the more notch type cans there
are the wider the notch will be at some given frequency. Think of it as an
upside down band pass response.
Note that the pass response of a band
Hi Joel,
There's going to be a lot of "if"s in this next text...
If your service monitor will generate an RF Signal and
allow an external modulation or sweep input (control).
A lot of this depends on the range of external control available
on your service monitor.
You might be able to se
> It has always been my experience that adding two or more
> cans in series always narrows the bandpass, not widen it.
Depending on your perspective you can series stager tuned
over-coupled band pass cavities to make a wider band-pass.
As in the case of a common receive pre-selector window f
Doug, It has always been my experience that adding two or more cans in series
always narrows the bandpass, not widen it. The first can will show a given dB
down at x frequency away from the center tune. Adding the second can will
decrease the level by the sum of the two at the same x frequency
I downloaded the soft / firm / update / manual combination you suggested.
It appears to be working.
So, we plan to let it run and see what happens.
Thanks for the help.
Steve, N7KP.
At 11:56 AM 6/27/2008, rick wrote:
>Gabriel
>There are 2 capacitors in series marked 2C
>KCK
>Someone familliar with the markings can indicate the actual value.
>from an old diamond, x500, if I remember. It came in 3 sections.
>There is a photo in your@ hotmail box.
Looking for a Mitrek complete.wanting to add 10m FM to my car.
price plus shipping.Yea I know,I can buy a ham grade radio, but why.
e-mail direct or via list.
[EMAIL PROTECTED]
73
Ray
Skipp, thanks for responding.
All I want is a setup for the equipment I listed (NOTE: NO TG in none of the
unit, the 2955/A will do duplex) that will allow me to tune a duplexer, and
the procedure.
v44kai.Joel.
- Original Message -
From: "skipp025" <[EMAIL PROTECTED]>
To:
Sent:
12.5 Khz should not make any noticeable difference. Steve
garyp609 wrote:
> I have a TX/RX Vari-Notch duplexer. Would the same thing apply to no
> re-tuning?
>
TX/RX will be very close to that as it is the nature of
ganging 2 pass /reject cans on each side of a duplexer... 2 cans on
each side actually widens things out as compared to one, but 2 are
deeper passes and reject notches than one three cans gets
wider/deeper yet... 4 cans winds
I have a TX/RX Vari-Notch duplexer. Would the same thing apply to no
re-tuning?
--- In Repeater-Builder@yahoogroups.com, "Steve Bosshard (NU5D)"
<[EMAIL PROTECTED]> wrote:
>
> Most band pass / band reject will be plenty wide - I measured over
200
> Khz on a Wacom 678 that I use with 3 UHF clo
> "Joel" <[EMAIL PROTECTED]> wrote:
> Can someone in the group give me a sketch diagram of the
> setup, for tuning a duplexer with the following equipment
> I have?.
>
> I have two (2) service monitors (Marconi 2955/A), and a
> spectrum analyzer (Avcom PSA-65A, no built-in tracking
> generator
Joe, I'd just call their 800 number on their website. A group of nice guys.
I've looked thru their huge supply of aluminum tubes and pipes in the back a
number of times for antenna projects.
Roger W5RD
- Original Message -
From: MCH
To: Repeater-Builder@yahoogroups.com
Sent:
When I first saw your posting I thought you were talking about ICOMs with the
G1 and G2 in the part number. I might be able to help, but I was not going to
dig thru the manuals to see.
When asking for parts just listing the LBI numbers excites few. I have trouble
digging out GE manuals to fin
Hello Group,
We are in the process of de-commissioning a complete surplus 800 MHz LTR
repeater site.
The equipment is listed below and was in good working condition and made up a
complete 5 channel site prior to de-commissioning. There are some spares which
some have been included here, s
Most band pass / band reject will be plenty wide - I measured over 200
Khz on a Wacom 678 that I use with 3 UHF close spaced combined trunking
repeaters (some minor loss). I don't believe re-tuning will be needed.
Steve NU5D
garyp609 wrote:
> If a repeater was on 447.575 and the frequency was
If a repeater was on 447.575 and the frequency was changed to 447.5625
would the duplexers need to be re-tuned?
Thanks & 73's
Gary K2ACY
I have X500 DIAMOND antenna and use this in a hamrepeater, in static
storm the antenna down and the internal capacitor burning.
Would anyone happen to know the values of the capacitors that are used
inside the diamond x500..??
Gabriel
XE3KGS
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