Hi
OH right, one theory out the window then.
I made one but it was very poor so I have on
order from Procom a real 50Mhz duplexer.
Steve
- Original Message -
From: Tim tahr...@swtexas.net
To: Repeater-Builder@yahoogroups.com
Sent: Monday, July 05, 2010 12:13 AM
Subject: Re:
Actually, with regards to a D-DSTAR signal opening up an analog receiver set to
decode only PL, it can happen. I had an analog repeater (Motorola) co-channeled
with a D-STAR repeater. The users of the D-STAR repeater would in fact open up
my repeaters receiver and pass through. I'm trying to
Hi steve, got it figured, tnx to Bob (wa1mik).
I didn't catch the part in his article that said
Receive only!!
Guess i'll try some larger air variables, or go to
The original design that used lengths of coax
Down rhe center conductor as a gimmic' cap.
I'll report back on how things turn out.
Hi Tim
glad you sorted it,they do work very well as a lot of 6mtr rptrs
here in the UK use them, I had no success, big problem. I checked
it with my analyser and the isolation was rubbish at 30dB, so I binned
it
73
Steve
Hi Eric,
First thanks you for pointing me to the manuals and Don for the NHRC Tuning
site.
Eric the combination numbers are MC74AAU33A. They came from a trucking
company and I think they are on 47.XXX. I am taking over the Wellsville
53.090 Repeater as the original owner is re-locating. He has a
Jim -
My experience with 6-FM is that you are going to have a much harder time
hearing the repeater than getting in to it. The noise encountered in a mobile
environment desenses your receiver. There are exceptions to this, but as a
general rule it's true. So, some loss on RX isn't necessarily
That's why base stations have 250 - 300w where mobiles are 100.
On 07/05/2010 12:20 PM, Chuck Kelsey wrote:
Jim -
My experience with 6-FM is that you are going to have a much harder
time hearing the repeater than getting in to it. The noise encountered
in a mobile environment
Jim,
A low-band repeater with a flat-pack duplexer having 90 dB of isolation?
That's amazing! My low-band repeater uses four 12 diameter cans that each
stand about five feet tall.
Your MC74AAU33A radio is an M-series 100 watt mobile radio, covered by PC-61
here:
Anybody have a manual for a Maxon TR-4800?
Thanks,
Will
Paul,
If I read your message correctly you had the receiver set to open on PL
only. Had you tried using PL AND CSQ (also called AND squelch) as the
opening requirement?
Milt
N3LTQ
- Original Message -
From: paul_k6eh paulmetz...@hamradio-dv.org
To: Repeater-Builder@yahoogroups.com
Hi Again Eric,
When you get a chance will you look at these duplexers and give me your
opinion?
http://www.radiodata.com/fiplex/products/PDFs/DHV05.pdf
The duplexer I got with the repeater is the Model DHV-0544.( THE 533 has
been discontinued)
The way I am reading their specs it is 90 dB at 1
I'd certainly try single site since you've got the reject filters. It's
certainly easier to manage than split site. With split site, in the hills we
have around here, you are going to get two different coverage areas - one for
TX and another for RX. If it were flatter, it wouldn't make a big
Good thoughts Chuck.
I never thought about the two patterns.
I have to check and make sure I have your Freq. programmed into my mobile.
73 JIM KA2AJH
On Mon, Jul 5, 2010 at 5:32 PM, Chuck Kelsey wb2...@roadrunner.com wrote:
I'd certainly try single site since you've got the reject filters.
You might make if from a hilltop. The Limestone 6-meter machine that's linked
in is down temporarily for some lightning repairs. That one is closer to you
and you'd probably get into it if it were up.
Chuck
- Original Message -
From: James Cicirello
To:
They are notch only devices and I've used similar devices using that
helical design for years.
If you don't have a lot of noise on/around site washing over your receive
freq, they will get the job done.
Kb0wlf
From: Repeater-Builder@yahoogroups.com
Jim,
I have no experience with such a small duplexer for low-band, since 6m
repeaters in my area (Central California) have a 500 kHz split- which
requires more isolation than a compact duplexer can muster.
73, Eric Lemmon WB6FLY
-Original Message-
From:
The spec sheet shows them to be bandpass/band reject.
From the document:
These duplexers utilize six high Q (helical)
resonant cavities, interconnected in a band pass-band
reject configuration which allows close spaced
transmit-to-receive frequency operation.
Joe
On 7/5/2010 6:33 PM, Chris
Yes, my error.
I had the old DB products on the brain.
=]
Kb0wlf
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Joe
Sent: Monday, July 05, 2010 6:18 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] MASTR II LOW BAND
I see what the sales flyer says, but the response plots show no real
bandpass action. Indeed, the plots depict exactly how a notch-only duplexer
responds. In fact, the plots look faked, IMHO. I have tuned many duplexers
over the years, and none of the plots look so perfect. If Fiplex
duplexers
I took a quick look at them, and what stands out like a sore thumb is 1.6 db
insertion loss with a 150 watt power rating. That means they'll be
dissipating close to 50 watts in such a small package. Doesn't give me a
warm and fuzzy feeling...
--- Jeff WN3A
...but it sure gives THEM a warm feeling!
73,
Paul, AE4KR
- Original Message -
From: Jeff DePolo
To: Repeater-Builder@yahoogroups.com
Sent: Monday, July 05, 2010 8:08 PM
Subject: RE: [Repeater-Builder] MASTR II LOW BAND TUNING
I took a quick look at them, and what stands
21 matches
Mail list logo
