Re: MTR2000 PL Decode question
Chris,
other thing too, I looked at the station operation controls and briefly rx mode says active then switches back to inactive.
Thanks
--Don
toggle quoted message
Show quoted text
On 3/11/25 17:14, Don Wisdom KD7WKF via groups.io wrote: Hi Chris,
The USB-RIM is set to use an active high signal for both COS and CTCSS. ?I have the PL line set in the wildcard however I just noticed that there isnt a output for pin C2 in the output group settings.? There is an output for pin C4.
Other thing the wildcard checkbox is greyed out on the system configuration screen.
Thanks
--Don
On 3/11/25 04:37, Chris Boone WB5ITT via groups.io wrote:
Wildcard programmed in the MTR? I take it you're using a transistor inverter to talk to the USB which normally requires a low going signal?
Chris WB5ITT
On Mon, Mar 10, 2025, 7:48 PM Don Wisdom KD7WKF via groups.io < groups.io> <dwisdom-lists@... <mailto:wiztech.biz@groups.io>> wrote:
??? All,
??? I have a MTR2000 here that I have interfaced to a USB-RIM module, I
??? have
??? it working in COS mode but want to run a ctcss code on it.
??? I was curious does anyone know if anything special needs to be set for
??? the ctcss valid pin to go high to tell the RIM that the correct PL/
??? ctcss
??? is valid?? I cant get the ctcss lead to go high to tell the RIM that
??? there's a valid ctcss code.? When I key up my handheld with the correct
??? ctcss code on it it initially says keyed under the signal status.
??? Ive tried several mixtures of settings.
??? Under Audio I have Analog RX Activation set to PL
??? Under channel info I have decoder set to RX PL of 67.0
??? I am using the ICS-CTRL MTR2000 Adapter board that goes to a DB9. Its
??? pulling from C2 for PL Detect & B4 for COR.
??? Thanks!
??? --Don
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Re: MTR2000 PL Decode question
Hi Chris,
The USB-RIM is set to use an active high signal for both COS and CTCSS. I have the PL line set in the wildcard however I just noticed that there isnt a output for pin C2 in the output group settings. There is an output for pin C4.
Other thing the wildcard checkbox is greyed out on the system configuration screen.
Thanks
--Don
toggle quoted message
Show quoted text
On 3/11/25 04:37, Chris Boone WB5ITT via groups.io wrote: Wildcard programmed in the MTR? I take it you're using a transistor inverter to talk to the USB which normally requires a low going signal?
Chris WB5ITT
On Mon, Mar 10, 2025, 7:48 PM Don Wisdom KD7WKF via groups.io < groups.io> <dwisdom-lists@... <mailto:wiztech.biz@groups.io>> wrote:
All,
I have a MTR2000 here that I have interfaced to a USB-RIM module, I
have
it working in COS mode but want to run a ctcss code on it.
I was curious does anyone know if anything special needs to be set for
the ctcss valid pin to go high to tell the RIM that the correct PL/
ctcss
is valid?? I cant get the ctcss lead to go high to tell the RIM that
there's a valid ctcss code.? When I key up my handheld with the correct
ctcss code on it it initially says keyed under the signal status.
Ive tried several mixtures of settings.
Under Audio I have Analog RX Activation set to PL
Under channel info I have decoder set to RX PL of 67.0
I am using the ICS-CTRL MTR2000 Adapter board that goes to a DB9.? Its
pulling from C2 for PL Detect & B4 for COR.
Thanks!
--Don
------------------------------------------------------------------------
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Seeking Cans / The Rally Repeater Build
Greetings all,
I have enjoyed reviewing numerous posts on this group over the past several?months,?especially as I plan and have started a build of a 25W iCOM ID-2010V based mobile repeater on VHF.
I'm writing to ask for pointers on finding a duplexer to purchase.? I already own the iCOM repeater controller.??
My application is primarily?for portable use, supporting both Olympus rally and Oregon Trail Rally in WA and OR respectively.? Recognizing the challenges of a VHF portable, I have a trailer in hand with an onboard power system, mast, antenna, and enough space to mount and travel with a full sized 4 or 6 cavity system.
Requirements: 25W and .6MHz frequency pair spacing.
Please go easy on me as I am ~4 year HAM and this is the first repeater I have worked on from scratch.? I've spent some time with local clubs at repeater sites and have worked in partnership on a DIY dispersed 2 site repeater using 2X TYT 9800s in VHF config with UHF crossband interlink before.??
Any help?would be greatly appreciated, specifically sourcing?a duplexer best suited for portable, and advice on mounting it for vibration mitigation.? Perfectly happy to purchase and adopt used equipment in good shape.? I also welcome advice on what models or types to shy away from.
Lastly, if you are in WA / OR and interested in volunteering for Rally Communications support, please have a look at my QRZ.
73 all,
Devin H.
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On 3/11/2025 8:55 AM, Kevin Custer
wrote:
I'll get the photos together and put
on a web page - and post a link here...
As promised....
Kevin W3KKC
|
This is not confined to amateur installs, I’ve seen some pretty messed up things at commercial sites.?
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Re: TKR 851 repeater for sale
toggle quoted message
Show quoted text
I've had my TKR751 V2 running 40watts out for 2 years +...put an external fan on it to help but it barely gets warm even tied to the East Coast Reflector!?
Chris WB5ITT?
At 3/11/2025 08:16 AM, you wrote:
At 06:29 AM 3/11/2025, you
wrote:
>V2's have a number of advantages over non-V2's, not all of which are
>important if you're using an external control, but are generally
>more important if you're not using an external controller.
>
>
<----I disagree. The pre Version 2's didn't have the improved PA
design and it was known for PA failures. Not extremely common but
they happened. Sure, you could retrofit the new PA board into a pre
V2 but it wasn't all that common to do. The new PA is essentially
bulletproof.
Ken
The main reason why I'll only buy v2 TKRs.
BTW I had a TKR-850 at full 40 W power for over a year: no problems -
hardly even got warm.? Only removed from service because I happened
to get a better radio to use (Tait TB8100).? A 2nd one has been also
running 40 W for 1 1/2 years now in MA: same result.
Bob NO6B
|
Re: TKR 851 repeater for sale
I've had my TKR751 V2 running 40watts out for 2 years +...put an external fan on it to help but it barely gets warm even tied to the East Coast Reflector!?
Chris WB5ITT?
At 3/11/2025 08:16 AM, you wrote:
At 06:29 AM 3/11/2025, you
wrote:
>V2's have a number of advantages over non-V2's, not all of which are
>important if you're using an external control, but are generally
>more important if you're not using an external controller.
>
>
<----I disagree. The pre Version 2's didn't have the improved PA
design and it was known for PA failures. Not extremely common but
they happened. Sure, you could retrofit the new PA board into a pre
V2 but it wasn't all that common to do. The new PA is essentially
bulletproof.
Ken
The main reason why I'll only buy v2 TKRs.
BTW I had a TKR-850 at full 40 W power for over a year: no problems -
hardly even got warm.? Only removed from service because I happened
to get a better radio to use (Tait TB8100).? A 2nd one has been also
running 40 W for 1 1/2 years now in MA: same result.
Bob NO6B
|
Re: TKR 851 repeater for sale
At 3/11/2025 08:16 AM, you wrote:
At 06:29 AM 3/11/2025, you
wrote:
>V2's have a number of advantages over non-V2's, not all of which are
>important if you're using an external control, but are generally
>more important if you're not using an external controller.
>
>
<----I disagree. The pre Version 2's didn't have the improved PA
design and it was known for PA failures. Not extremely common but
they happened. Sure, you could retrofit the new PA board into a pre
V2 but it wasn't all that common to do. The new PA is essentially
bulletproof.
Ken
The main reason why I'll only buy v2 TKRs.
BTW I had a TKR-850 at full 40 W power for over a year: no problems -
hardly even got warm.? Only removed from service because I happened
to get a better radio to use (Tait TB8100).? A 2nd one has been also
running 40 W for 1 1/2 years now in MA: same result.
Bob NO6B
|
Re: TKR 851 repeater for sale
At 06:29 AM 3/11/2025, you wrote: V2's have a number of advantages over non-V2's, not all of which are important if you're using an external control, but are generally more important if you're not using an external controller.
<----I disagree. The pre Version 2's didn't have the improved PA design and it was known for PA failures. Not extremely common but they happened. Sure, you could retrofit the new PA board into a pre V2 but it wasn't all that common to do. The new PA is essentially bulletproof. Ken ------------------------------------------------------------------------------ President and CTO - Arcom Controllers Makers of repeater controllers and accessories Phone: (503) 678 6182 Authorized Dealers for Kenwood and Telewave. We offer complete turn-key repeater packages! "We don't just make 'em. We use 'em!" []
|
I think the isolation is measured from tx to rx port or the other direction with the antenna port terminated. Insertion loss would be one leg to the antenna port.?
|
The replacement piston trimmer cap is a Johanson 5602 1-30 pF 250V. I’ve seen a number of DB4060/4062 cavity sets with a blown trimmer cap. FWIW not an easy cap to source.?
If you look at the specs of the DB4060 4 cavity duplexer, each leg of two series cavities offers 80 dB isolation with 1.5 dB insertion loss. ?If you measure one side of the duplexer that is what you would expect to see.
Ralph W4XE
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Show quoted text
On Mar 10, 2025, at 8:46?PM, Gerald Lucha via groups.io <gvlucha@...> wrote:
?
I have zero experience tuning
duplexers but I have been following the
repeater builder list for several years, trying to learn and
because it
is so interesting.?
Recently, our club received a? VHF DB Products 4060 four can
duplexer from what was reportedly a working repeater (SK, I
think).? I seem to have foolishly volunteered to check it out
and retune it to a new VHF pair.? I have a nano VNA, a sig gen
and SA to work with as well as lots of dummy loads, attenuators,
HTs etc.? But zero experience so I am begging for advice.
My initial plan was to check and tune the cavities for good SWR
at the TX and RX frequencies (2 cans each)? Then to examine the
insertion loss of each cavity individually.? But I have no idea
what to expect.? What should be the expected insertion loss of a
single cavity?? What should be the expected loss be at the
rejection dip tuned by the series cap in the loop?? So far I am
seeing only about -30dB at the dip.?
I have already discovered a bad cap in one of the cans.? There
may be other problems.? So far, I cannot even be sure whether
these are the "B" models for the ham band but am assuming so
since the SK's repeater was VHF.? The whole diplexer was thickly
painted so that I cannot see any ID numbers on the loop boxes
either inside or outside.? Any and all advice will be gratefully
accepted.? 73, Jerry W6OJE
|
Re: TKR 851 repeater for sale
- what is the difference between an 850 and an 851?
? 25 watts. ? TKR-850 is 50 watts intermittent, 25 watts continuous duty. ? TKR-851 is 25 watts continuous, period. ? Firmware-wise and feature-wise, TKR-851 is the equivalent of a “V2.0” TKR-850.? That is, there is no such thing as a non-V2 TKR-851.? Note that there is no “V1”; TKR-x50’s have either no version number, or they are “Ver 2.0”.? Additionally, the hyphenated number after the model number (e.g. TKR-750 -1) does not mean version 1; the hyphenated suffix is the bandsplit. ? 痴2’蝉 have a number of advantages over non-痴2’蝉, not all of which are important if you’re using an external control, but are generally more important if you’re not using an external controller. ? ??????????????????????????????????????????????????????????????????????????????? --- Jeff WN3A
|
Re: Motorola DMR Repeaters
Hey Steven, I probably wouldn't spend that much for a used one, maybe offer him 2000 since it says make an offer. I bought mine brand new about a year ago for 3000. I have an extra one in the box that I bought an eBay for 1083 but that was for parts are not working and I spent $645 for a flat rate repair for Motorola. Chad Nelson WI9HF/WRPL979 Janesville Wisconsin 608-754-8671 Send from my spectrum iPhone 16.
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On Mar 10, 2025, at 11:12?PM, steven harvey <sharvey@...> wrote:
? Hi Chad,
?
Just wanted to double check if these are the proper model of SLR5700.??? Is the average price between 2K to 3K for a good unit?
?
Ebay link:
?
Thanks!
Steven H.
N8RLW
|
Re: fs: AnritsuSitemaster S331l
Yes, they are selling for more than I'm asking on ebay plus shipping. I have to pay for my quantar I just bought from sunny communications or the anritsu andnmy other gear wouldn't be up for sale. I also have other stuff for sale not listed here as it's broadcast related and has nothing to do with lmr or repeaters. I will also have a Kenwood 851 coming for sale? when it gets replaced with the quantar as well as a micromagic 150W reject only duplexer. If i can sell this other equipment and make back what im out of pocket for these upgrades then the Kenwood will be donated to the local ham club for a mobile command / site repeater. The local ham guy in charge of ares wants to incorporate gmrs into ares and the local EM plan. I'm trying to make that main repeater the best it can be and spared no expense. I'm on a fixed income and the fmrs repeater trustee and it's not under a 501c so I can't accept tax free donations I'm doing this entirely on my own and out of my own pocket and how I do that is buying and selling to support the repeater stuff.
Thanks
Robert
This is the same one you paid 600 for a few months ago? ? Matt AL0R ? From: repeater-builder@groups.io <repeater-builder@groups.io> On Behalf Of Part 15 Engineer via
Sent: Tuesday, March 11, 2025 07:27
To: repeater-builder@groups.io
Subject: [repeater-builder] fs: AnritsuSitemaster S331l ? Is there any interest among the braintrust for an Anritsu Sitemaster S331l Advanced cable and antenna system analyzer? $1300 shipped conus ups ground insured. Located in Scottbluff NE 69361 Local pickup and cash or PayPal for shipping.
|
Re: fs: AnritsuSitemaster S331l
This is the same one you paid 600 for a few months ago? ? Matt AL0R ?
toggle quoted message
Show quoted text
From: repeater-builder@groups.io <repeater-builder@groups.io> On Behalf Of Part 15 Engineer via groups.io
Sent: Tuesday, March 11, 2025 07:27
To: repeater-builder@groups.io
Subject: [repeater-builder] fs: AnritsuSitemaster S331l ? Is there any interest among the braintrust for an Anritsu Sitemaster S331l Advanced cable and antenna system analyzer? $1300 shipped conus ups ground insured. Located in Scottbluff NE 69361 Local pickup and cash or PayPal for shipping.
|
Jerry,
I'm willing to help you quantify what you have and get your
duplexer tuned correctly.? I can do that here - or in private
emails.? Your choice.
To answer your immediate questions - the insertion loss you should
be experiencing per cavity is 0.5dB or slightly less and the
resulting notch depth should be 37 dB.? Then - when fully cabled,
the total insertion loss per leg should be less than 1.5dB per leg
(1.0dB typical) and around -83 / -85 dB notch depths.? The reason
the notch depth is greater than the simple sum of the two cavities
is there's an additional 5.5dB (or so) of additional notch depth
per cavity interconnect cable.? I don't have a copy of my VNA
graphs for this duplexer - but Jeff uploaded a set of graphs in
post #197414 (of this group) for one he rebuilt and converted from
"C" to "B" some years ago.
If you're only having problems with one cavity, the issue you are
experiencing with reduced notch depth may be caused by corrosion
or something between the flange on the connector / loop box and
the top of the cavity.? I had one of these in the shop that I also
thought had a bad adjustable capacitor because I couldn't get the
notch to tune correctly with the same number of turns as the other
cavity.? I found the factory didn't mask the top of the cavity
correctly and it ended up being painted over some of the distance
of the mating surface where the boxes flange and the top of the
cavity contact each other.? I have photos of what I did to correct
the problem and after the surfaces were burnished, the cavity
worked as it should - the capacitor was not bad.? I decided to do
all four cavities and the duplexer easily made specification after
the work.
These duplexers are known for poor silver plating, where the
plating "sheds" off.? To fix this requires a lot of work to
disassemble and re-plate with silver.?
I'll get the photos together and put on a web page - and post them
here...? In the mean time - go to the page on RB and look at all of the
information concerning the DB4060 and DB4062 duplexer and read
it.? The spec sheet and the info on can be
viewed to see which coupling loop assemblies you need for the 2M
ham band.? There is also information in the archives of this group
by Jeff WN3A that will help you.
Kevin W3KKC
On 3/10/2025 9:45 PM, Gerald Lucha via groups.io wrote:
toggle quoted message
Show quoted text
I have zero experience tuning
duplexers but I have been following the
repeater builder list for several years, trying to learn and
because it
is so interesting.?
Recently, our club received a? VHF DB Products 4060 four can
duplexer from what was reportedly a working repeater (SK, I
think).? I seem to have foolishly volunteered to check it out
and retune it to a new VHF pair.? I have a nano VNA, a sig gen
and SA to work with as well as lots of dummy loads,
attenuators, HTs etc.? But zero experience so I am begging for
advice.
My initial plan was to check and tune the cavities for good
SWR at the TX and RX frequencies (2 cans each)? Then to
examine the insertion loss of each cavity individually.? But I
have no idea what to expect.? What should be the expected
insertion loss of a single cavity?? What should be the
expected loss be at the rejection dip tuned by the series cap
in the loop?? So far I am seeing only about -30dB at the dip.?
I have already discovered a bad cap in one of the cans.? There
may be other problems.? So far, I cannot even be sure whether
these are the "B" models for the ham band but am assuming so
since the SK's repeater was VHF.? The whole diplexer was
thickly painted so that I cannot see any ID numbers on the
loop boxes either inside or outside.? Any and all advice will
be gratefully accepted.? 73, Jerry W6OJE
|
Wow...just...wow...
toggle quoted message
Show quoted text
On 3/11/2025 2:01 AM, Jeremy Hansen via groups.io wrote: I was recently sent this photo after donating a Kreco C-36 colinnear vertical for a local 6 meter repeater project. Got a message am that they were experiencing high swr. The antenna is factory cut for 53 mhz and is being used on 53.150.
Note the DB420 right next to the C-36. Definitely NOT going to work.
On Mon, Mar 10, 2025, 11:24?PM steven harvey via groups.io <> <sharvey@... <mailto:blueislandtech.com@groups.io>> wrote:
Might not be what your looking for.
I used 2 mag mount mobile antenna's on a PVC pipe with a simulated
platform to show the different levels of separation as if was on a
tower to demonstrate the difference.??? You can even use two welders
vise clamps and move them up and down the PVC and take a few photos.
? Will help the visual learners in your class and most everyone
else plus its cheap to make to demonstrate to people who don't
understand horizontal and vertical separation.
Thanks!
Steven H.
N8RLW
|
Re: fs: AnritsuSitemaster S331l
Re: anritsu: only accessories included are the power supply / charger and carry case. Osl and calibration cable are easily available on ebay. The person I bought this from never sent the accessories and it's been afew moths so I suspect I will not be seeing any accessories but if the osl and calibration cable should arrive I will forward to buyer free of charge.
Thanks
Robert
Is there any interest among the braintrust for an Anritsu Sitemaster S331l Advanced cable and antenna system analyzer? $1300 shipped conus ups ground insured.
Specs and info...
Located in Scottbluff NE 69361
Local pickup and cash or PayPal for shipping.
|
fs: AnritsuSitemaster S331l
Is there any interest among the braintrust for an Anritsu Sitemaster S331l Advanced cable and antenna system analyzer? $1300 shipped conus ups ground insured.
Specs and info...
Located in Scottbluff NE 69361
Local pickup and cash or PayPal for shipping.
|
Re: New to me Motorola R-2001b
I am not an expert on servicing the R2001B which is an almost entirely different animal than the D version which was the last to be released. But the main point is that only the D version did fix many well known issues that where prevalent in the earlier A-C versions, including the elimination of the somewhat flimsy front swing handle. Another issue with these monitors is that the early ones had Magnavox CRTs that tended to get weak and fail way too soon. For the D series Motorola started using imported AEG and Telefunken CRTs that performed much better over time, but given the age of these instruments now, one should always check that the CRT is still good no matter what version. And once the CRT goes bad there is no easy alternative but to find a replacement ("unobtanium"), try using a CRT restorer to restore some of the life in the CRT, or jury rig an external XY monitor. Without a working display the R2001 is basically useless.
So my only advise in this case would be to start checking all power supply voltages BEFORE doing anything else like swapping caps etc. And for anyone else out there looking to get one of these R2001 service monitors to ideally always shoot for a R2001D, and even better if its a HS variant (high stability main oscillator).
There are many variants of the R2001D with slightly different model numbers depending on options like cellular, encryption, trunking, etc, but the desirable radio testing base capabilities are always present on all of them. One of my service monitors is a R2008D-HS, which basically is a R2001D with an added card for analog cellular testing. When I got it it had a few problems like a flaky tuning encoder ("RF Scan") and the PL/DPL tone generation was not working. Was lucky enough that seller had lots of spares on hand and send me a replacement board to fix the tone issue (was a bad crystal), and also a working rotary encoder.
|
N7IQZ / WRFK332
Kevin Custer
Chris Boone WB5ITT
Ken Arck AH6LE
