Thanks Joe and Jeff for the instructions. From the Celwave sheet I guess the
model number of my circulator may be CC460-AA, the model number is stamped so
close to the sticker border that the second A would be off the border...
In the meantime I also found a helpful document, also uploaded it
Does anyone have a datasheet or tuning instructions for this kind of
circulator? It's a single stage with 3 adjustment screws and right now the
sticker says it's on 420 MHz and I would like to know how I get a working range
from 430 to 440 MHz. If somebody can explain without the doc this is
That book does indeed look interesting, but I wasn't able to find anything out
about that article, unfortunately.
This did help! Now I found the missing 40 dB... I posted some pics:
Duplexer pics
http://conturafm.mine.nu/photo/photo_thumb.php?dir=68616d726164696f2f72\
657065617465722f6475706c657865722f41464c
In the folder pass-reject readjusted there's a picture of the view
with the 40 dB hidden and how it
Can somebody please explain how the insertion loss of a duplexer is properly
measured using a HP 8920A (with specan). I'm pretty new to this instrument as
well as duplexer work but am eager to learn. Thanks.
73
Martin
P.S.: Is it correct that a duplexer that has 40 dB isolation in each leg
Thanks guys I'll have another go tomorrow (it's 0.30 a.m. in my place now).
Concerning the isolation question I was obviously wrong, I came up with the
idea because the duplexer is a commercial tetra duplexer of which I had the
factory test certificate filed and only remembered something like
From those files the Agilent Technologies 8920A-B Application Handbook
08920-90126.pdf manual might be what you're looking for, but you'll need to
find out if this works for the 8924C as well considering menu structure,
buttons etc. From my E8285A I know that some things work different than
This DDRR antenna is also new to me but space-wise it is even smaller than the
squalo so definitely worth considering, especially because I wouldn't want to
try the squalo if the majority says it won't perform as expected.
Would you use just one of them even though it's on the side of the
Some time ago in another post I already asked for compact 6m repeater antenna
ideas as we're limited in antenna height in the place we want to install our
upcoming 6m club repeater. Obviously this was no easy to solve problem.
Just lately did I come across a QST article Six Meters from Your
Hi Joe
We have access to 3 platforms of that tower and the total height of all our
antennas on all platforms must not exceed 5 meters. As far as I could find out
if 2 or 4 coupled antennas would be mounted on the same level around the tower
they would probably count as one system with the
Hi
Does somebody have surplus Maxtrac/Radius lowband high split (42-50) radios for
sale? I'be interested.
Regards
Martin
Thanks for all replies. First of all this is the first duplexer I'm building
and I'm not a very experienced user of the spectrum analyzer/tracking generator
so it is possible that I adjusted something wrong as some of you point out.
I'll try if that makes a difference as soon as I can.
I only had a quick try tonight and found that I can get a pretty sharp line on
the display if I turn the rf gen amplitude up to 10dBm. Then I need to turn
down the ref level to 20dBm to have the curve inside the display at all.
Furthermore there was a warning change rf gen amplitude, output
I would be interested in a CSM1000 (Link-Comm) or R2590 (Motorola/General
Dynamics) service monitor (basically the same) if available for a reasonable
price. These were budget service monitors afaik but small and portable compared
to the HP E8285 I'm currently using for bench work and which is
Subject: Re: [Repeater-Builder] Motorola R100 lowband on 6?
I was a Radius dealer for quite a few years and only saw VHF and UHF R100
versions.
Bill
KB1MGH
--
From: cruizzer77 atlant
Hi
Does anyone know of a lowband R100 that has successfully been converted to 6m?
73
Martin
For our 6m repeater project I had planned to use a DB212 clone as an antenna.
But the repeater is to be located at a commercial site unfortunately and it
turned out lately that antenna height is restricted so much that the height of
about 2.5 meters of a single DB212 may already be too much.
on a ground plane would be a few inches shorter.
Chuck
WB2EDV
- Original Message -
From: cruizzer77 atlant...@...
To: Repeater-Builder@yahoogroups.com
Sent: Wednesday, February 03, 2010 8:25 AM
Subject: [Repeater-Builder] Space-saving 6m repeater antenna?
For our 6m repeater
not permit a home-brew.
Chuck
WB2EDV
- Original Message -
From: cruizzer77 atlant...@...
To: Repeater-Builder@yahoogroups.com
Sent: Wednesday, February 03, 2010 9:34 AM
Subject: [Repeater-Builder] Re: Space-saving 6m repeater antenna?
You're right, the mounting location
I meant narrowband just as I wrote it. Unfortunately.
--- In Repeater-Builder@yahoogroups.com, Walter H walter.howard...@...
wrote:
Narrowband?
Did you mean 'duplex'?
WalterH
--- In Repeater-Builder@yahoogroups.com, cruizzer77 atlantis7@ wrote:
SNIP
In a later step I
I live in Switzerland and we have other band plans over here. 2m is completely
narrowbanded already.
--- In Repeater-Builder@yahoogroups.com, wd8chl wd8...@... wrote:
cruizzer77 wrote:
I meant narrowband just as I wrote it. Unfortunately.
??? I don't know of any reason
I'm converting a lowband Mitrek for 6m repeater use.
Most of the mods have been done according to
http://www.repeater-builder.com/mitrek/mitrek-interfacing.html
The problem is that at the emitter of Q406 I can't get a valid signal when I
feed the receiver with a 5kHz modulated signal. Only
I'm building a duplexer similar to the Decibel DB4032 for 6m, so far one cavity
has been built and measurements look promising.
Concerning the cable harness I know that some diagrams have been published with
adjusted cable and stub lengths for ham use, but I would prefer to know how
these are
There are tons of Mitrek mods out there but I haven't found the adjustable
output power mod. Therefore: Is it easily possible to make the output power
adjustable using a pot or trimmer? The desired model is a lowband Mitrek for a
6m repeater conversion.
73 Martin HB9TZW
I'm collecting info about using a Tait T800 series 1 low band repeater as a ham
6m repeater, but info is very scarce. I do not own such a repeater yet but know
where I'd get one in case I see that there is some hope for success.
These are the problems one will most likely run into:
First of
center to outer edge.
-- Original Message --
Received: Sat, 14 Nov 2009 10:41:05 AM PST
From: cruizzer77 atlant...@...
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] DB-212 detailed info wanted
Does anyone have detailed info about the DB-212 antenna (converted
Does anyone have detailed info about the DB-212 antenna (converted to 6m) that
make it possible to build one from scratch?
All the measures and info about the mount and feed point are interesting in the
first place.
73 de Martin HB9TZW
duplexers
are actually pretty nice... and cheap if you're resourceful
with recycled/removed feed lines.
s.
--- In Repeater-Builder@yahoogroups.com, cruizzer77 atlantis7@ wrote:
We're going to build a 6m repeater in a place where space is very limited,
which means that building a full
Does anyone know a source for shielded molded coils in 10mm size?
Mouser don't have them any more and Coilcraft only sell directly and are so
damn ham unfriendly that I don't want to buy from them if there's any other
possibility.
Is there a retailer anywhere who sells them?
Regards
Martin
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of cruizzer77
Sent: Saturday, August 08, 2009 12:54 AM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Sinclair R2B12 duplexer
Does anyone have
Does anyone have technical info (i.e. tech drawings) or inside pics of these
duplexers? I wonder how they do the shortening as there can't be a 1/4 wave
resonator for 2m inside this 19 box...
Regards
Martin
I have been unlucky with my Stabilock 4015 lately. First of all some may
ask why didn't you get a HP, and I will tell you that over here in
Europe HPs are just not nearly as widespread as in the US.
First the computer board was faulty and I finally sent the monitor to a
specialist in Germany for
. When we finally got the
money together we bought a 4 can 8 inch DB duplexer and it is still in
service.
73 - Jim W5ZIT
--- On Sun, 4/26/09, cruizzer77 atlant...@... wrote:
From: cruizzer77 atlant...@...
Subject: [Repeater-Builder] Re: W1GAN and square duplexers aka homebrew
duplexer
in the ground leg of the loop to set the notch
frequency.
On Fri, Apr 24, 2009 at 4:19 AM, cruizzer77 atlant...@... wrote:
Hi
Most of you who are into duplexers will know W1GAN's old QST-article A
Homemade Duplexer for 2-Meter Repeaters.
His design uses 4 copper tubes, but today
Hi
Most of you who are into duplexers will know W1GAN's old QST-article A
Homemade Duplexer for 2-Meter Repeaters.
His design uses 4 copper tubes, but today many duplexer manufacturers use
square aluminium profile as duplexer bodies, i.e. Sinclair but others as well.
Now I wondered if W1GAN's
transfer feature? How well did it
work practically? Especially considering people who do disturb, be it
intentionally or unintentionally?
Regards
Martin
--- In Repeater-Builder@yahoogroups.com, Ken Arck ah...@... wrote:
At 12:34 PM 3/25/2009, cruizzer77 wrote:
Just the other day I thought how
Just the other day I thought how cool it would be to have a data connection to
a bells and whistles repeater controller, so that configuration or even
software updates could be done remotely. If an internet connection is available
at the repeater site this should not be a very big deal. But
Just the other day I thought how cool it would be to have a data connection to
a bells and whistles repeater controller, so that configuration or even
software updates could be done remotely. If an internet connection is available
at the repeater site this should not be a very big deal. But
I know there are some people around this group who are into Daniels
equipment. Can anyone tell me something about narrowbanding the MT-2
series which was not meant for 12.5kHz use? Has it been done? Can it
be done? Many thanks.
Kind regards
Martin
to get rid of a single tone
when it is in the 'notch' mode. I have an older Radio Shack DSP that
renders CW uncopyable as only a very short click at the beginning of
each element is heard.
73 - Jim W5ZIT
--- On Fri, 10/24/08, cruizzer77 [EMAIL PROTECTED] wrote:
From: cruizzer77 [EMAIL
Hi
I'm looking for a circuit which removes dtmf tones and maybe other
tonebursts from the rx audio before it is fed to the tx.
There are circuits around which use the MN3008 and MN3101 ics which
are both obsolete now so are no choice. One possibility would be to
replace them with similar ics
Hi
I badly need a users manual at the moment for the 4015 Stabilock
service monitor, and for future use I'd be happy to find a service
manual as well. If anybody has one or has any idea where to source
them please let me know.
Martin HB9TZW
I have an uhf Microwave Solutions duplexer, at the moment it is a
spare unit but sooner or later I hope to use it.
It is not built like the more common duplexers with have several
cavities in series and each one has one plunger, this one has only two
cavities, one for the high and one for the low
I've been interested in a service monitor with spectrum and tracking
for some time. Now I'd have the possibility to get an IFR 1900 CSA for
$1200, the problem being that power meter and am modulation fail the
self test. The plus points I see in this unit are that it's not too
old and it seems to
I'm looking for Daniels repeaters or components, older equipment like
MT-2 or MT-3, VHF highband and UHF analog FM.
If there's anyone out there who can help me source any I'd be happy.
Kind regards
Martin
Hi
This was asked before, but did anyone ever find a source for a 1100S
service manual? There seem to be lots of people in need of one, but
none around.
- The one on the repeater-builder website is unfortunately definitely
for the 1000S model
- I have spent a lot of time using Google but no
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