You need to have a service monitor that has a tracking generator / spectrum
analyzer to accurately tune the duplexer. Find someone that has one help you
with tuning the duplexer. If nobody has one, take it to a radio shop and ask
if they could please re tune it. They may or not charge you.
Hopefully, you have only tried to tune on of the cans. If you still
have a can that is tuned to the original frequency they were working
(???) on, try to follow the procedure on repeater builders carefully.
If you get that one working, you can try to set the rods to the same
dimensions as
There's no way to tell how much, the adjustments interact with each other.
Chuck
WB2EDV
- Original Message -
The question remains though, how much should I expect to have to move
the plastic stick in the reject adjustment?
Joe is correct, if you're going to try an tune it without the proper test
equipment, you will not get it perfect. It may work, but not as well as
it could. Early in my career, I was able to tune a duplexer with a couple
HT's, one for xmit and one for receive, but I found I needed a step
If you bring them to me I will (try to) tune them for you...
No charge.
- Original Message -
From: Repeater-Builder@yahoogroups.com Repeater-Builder@yahoogroups.com
To: Repeater-Builder@yahoogroups.com Repeater-Builder@yahoogroups.com
Sent: Sun Jul 19 07:33:17 2009
Subject: Re:
Jon;
Using the dsb dongle which is a CM108 chip based usb audio
interface one of the internal I/O pins of the device is mapped for
each ptt and cor.. BUT.. COR is not really needed as the device DSP can
handle signal to noise squelch and will work better on its own on raw
Okay guys, I might be biting off more than I know here, but I've been
tasked out to try to get this accomplished for a new fledgling group
of hams here.
How much effort is really involved in converting a 406-420Mhz Mastr II
machine (combination ending in 77) up to the ham band?
Need to start
Ethernet on a fiber backbone.
--- In Repeater-Builder@yahoogroups.com, Kevin King kc6...@... wrote:
Martin,
What transport are you using between the routers? Are you Ethernet to
another router or do you have a T1 wic in the 2600's?
-Original Message-
From:
Should have added this is a Mastr II station (Comb #DC757YAU77D).
Thanks,
Dave
--- In Repeater-Builder@yahoogroups.com, Dave Cochran d...@... wrote:
Okay guys, I might be biting off more than I know here, but I've been
tasked out to try to get this accomplished for a new fledgling group
of
Has anybody ever found a cookbook setup for this. I have a pair of 2600's,
and the VIC-2E/Ms, and NM-1's, but it seems my IOS version is 12.3 and won't do
it, plus, IOS, while fairly intuitive, has so many crankhandles that I get lost
in the setup.
It seems that while the hardware may be
Dave,
The component differences may be detailed out in the LBI's for the 77 or 88
split models. But, just trade somebody the receiver front end/LO and exciter
from an 88 split. Your 77 is less common. Easy change out then align and
you're going.
73
Don W5DK
-Original Message-
From:
Is there a cheap converter that will take an Ethernet connection and be able
to convert to 4 wire to connect directly to a controller port. If we could
have, COR, PTT, RX Audio TX Audio this would be a great way to link via
Ethernet.
I thought I would throw this out there to see if anybody
Watch your signal strength meter on your radio. The input signal may not be
weak enough to hear a noisey-quiet-noisey Actually while tuning for a
notch you need to be listening to the freq you are trying to notch and it
will be a quiet-noisey-quiet as you move the notch rod on the side. Tune
for
--- In Repeater-Builder@yahoogroups.com, George Csahanin geo...@... wrote:
Has anybody ever found a cookbook setup for this. I have a pair of 2600's,
and the VIC-2E/Ms, and NM-1's, but it seems my IOS version is 12.3 and won't
do it, plus, IOS, while fairly intuitive, has so many
I have just uploaded to the Files section of this Group five FSBs (Field
Service Bulletins) that pertain to MotoTrbo equipment. Of particular
importance is FSB10163, which addresses the correct procedure to follow when
upgrading the firmware in XPR repeaters, mobiles, and portables.
Those
Yesterday, with a buddy, I attempted to tune my first set of hybrid ring
duplexers. I have successfully tuned many sets of duplexers and didn't
expect to have any trouble with a minor freq move. I have read and
understand the theory behind the design.
My experience has been that if you use a high quality cable, high quality
connector and crimping dies made specifically for the particular cable and
connectors...crimp-on will working very well. It won't be cheap though. I
have, when practical, soldered the connector tip to the cable...after
http://www.cisco.com/en/US/docs/ios/12_3t/12_3t7/feature/guide/gtlmrip.pdf
This document has a good set of examples of how to set this up.
You should be able to download the version of IOS you need. Or the friend
that gave them to you might have the ability to get it from Cisco.
-Kevin
Hi again,
In my first post I miswrote a thing or two and much confusion as to my
question ensued. Hopefully I've written this more clearly. Thank
you to all who responded to my earlier question and my apologies for
wasting your time by having you answer the wrong question.
I have a
I wonder what you call not cheap?
I paid lots for my soldering station and much less for my crimps ($80.00) as
example for coax , the current crimps have done many thousands of connectors
and might be replaced before i retire which will mean 2 decades of use .
Has anyone seen / modified any Wacom Preselector cavities model WP-747L3 /
WP-447L1 for use in the 222 / 224 Amateur Band Split?
I have purchased a set of these cavities (they are still in the UPS truck) and
I was trying to find any tuning information for them. So far all I can find is
some
I have in face tuned a WP-639 and would guess for that freq swing from
146.97 to 146.88 it will be very little movement of the rod assuming the
pass tuning is correct. Remember, the rexolite rod is tuning the notch
and that
notch is relative to the pass setting of the invar rod. It is extremely
Dave, I have moved about 5 stations that were in Forrest Service use around 417
mHz, and have a few suggestions.
Buy a mobile 88 split receiver and don't attempt to change the 77 receiver
front end. I modified three of them by removing one quarter turn from each of
the helical resonators, and
I helped a buddy check a set of Sinclair VHF Hybrid Ring duplexers a couple of
years ago, and was really impressed by the performance of that 4 cavity
duplexer. We had +20 dB available at the output of the signal generator and
could not see the bottom of the notches on a 80 dB spectrum
At 08:05 AM 07/19/09, you wrote:
Okay guys, I might be biting off more than I know here, but I've been
tasked out to try to get this accomplished for a new fledgling group
of hams here.
How much effort is really involved in converting a 406-420Mhz Mastr II
machine (combination ending in 77) up to
--- In Repeater-Builder@yahoogroups.com, Gary Hoff k7ney...@... wrote:
I have in face tuned a WP-639 and would guess for that freq swing from
146.97 to 146.88 it will be very little movement of the rod assuming the
pass tuning is correct. Remember, the rexolite rod is tuning the notch
and
26 matches
Mail list logo
