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
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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: [email protected] <[email protected]> On Behalf Of Part 15 Engineer via
Sent: Tuesday, March 11, 2025 07:27
To: [email protected]
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.
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Re: fs: AnritsuSitemaster S331l
This is the same one you paid 600 for a few months ago? ? Matt AL0R ?
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From: [email protected] <[email protected]> On Behalf Of Part 15 Engineer via groups.io
Sent: Tuesday, March 11, 2025 07:27
To: [email protected]
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.
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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:
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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
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Wow...just...wow...
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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:[email protected]>> 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
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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.
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Re: Motorola CDM Widekey 06.12.09???
There is a hack to one of the files to make the .09 software wide band without the entitlement key. Personally I just use .08 ... I've taken radios that were narrowband and use the wide band software without a problem.. I just wouldn't go back too far.. The difference between .08 and .09 is the narrow band restriction but nothing else iirc
Chris WB5ITT
Can anyone actually test these claims????
I and friends have a half-dozen CDMs in service of various model numbers and front-mount and remote-mount
configurations in service and my personal experience is limited - all of the ones I have and use are old enough
that 6.12.05 (or prior) was current when they were acquired, and I've never needed to use anything newer.
Hence I have not had a problem downloading or reprogramming any of them.?
?
A while back I received an email that informed me that keys were different between product lines, were no
longer available, and that he had to sell the radio and buy another. I did some checking with a couple of
locals and they verified that keys were different and not available.? I added all of that to a paragraph that
I put on the CDM page at repeater-builder:?
I was told that any later version locks you to the 12.5?KHz unless you have a "Professional Series" wideband
entitlement key – And the keys are different between MotoTurbo (DMR), Professional Series, and Commercial
Series (and as of late 2024 all of those keys are no longer available). An email to Repeater-Builder reported
that this "feature" bit the sender in the behind when he purchased a radio on eBay that was last programmed
with a newer version (R06.12.09 was the last version). He ended up reselling that radio on eBay and bought
another as he needed wideband and couldn't get a key, and the replacement CDM was happy with Release
6.12.05. I have been told that the only difference between Release 6.12.05 and the later releases is the forced
narrowband, the addition of a few newer model numbers into both the internal programming tables and into
the directory that contains the sample codeplug files (and those sample files can be copied from the newer
versions into your copy of Release 6.12.05). Unless you really need something in a later release (and you'd
better have an entitlement key) there is no need to go anything newer than Release 6.12.05. And always ask
the seller what the radio was last programmed with.
Now what is the truth?? Are entitlements available? ?
Can 6.12.05 overwrite a 6.12.08 or 6.12.09 codeplug???
Or is there a hacked copy of CPS "out there" that allows overwriting?
Can anyone answer these questions??? I'm sure that all of us would like to have *accurate* info
on repeater-builder.
And thank you to the person who posted the 6.12.08 Release Note.? I grabbed it and added it to
the page at repeater-builder today.
Mike WA6ILQ
?
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Re: MTR2000 PL Decode question
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 <dwisdom-lists= [email protected]> 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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I retuned my DB4060 by first tuning the bandpass on all four cavities to the correct frequency and then going back and tuning the notches for minimum signal pass through on the notch frequency..
I hit dead on specs that way without a problem. It's on 100 w Quantar.... Didn't use a VNA or anything like that
Hi Gerald,
?
There is tuning advice on for this model. ? And many others here to help?
?
One thing I do want to say is that if the club is planning on taking this and using it on a Yaesu Fusion (or Bridgecom), there won't be enough isolation.?? I will leave it to others as to how much you actually need (I believe about -100db).?? The reason for this is that the Yaesu is basically two radios in a box, and doesn't have the isolation to start with as a GE MASTR II, Micor or a lot of other "ancient" radios with front ends and low TX noise.?? If that's not what you are trying to do, you can ignore this, but this question comes up about twice a year on here.
?
Andy
WJ9J
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A little too much mutual coupling there? ?
Chris WB5ITT
On Tue, Mar 11, 2025, 1:01 AM Jeremy Hansen via <jeremyhansen27= [email protected]> 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.?
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
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Re: TKR 851 repeater for sale
There is a significant difference between the 750/850 and the 751/851 in the speced output power ranges. The 750 range is 25 - 50W, the 850 range is 25 - 40W, and the the 751/851 range is 1 - 25W. As Ken mentioned, the 750/850 are not speced to run 100% duty cycle above 25W, while the 751/851 will run 100% up to their max of 25W.
Also, the service manuals are not identical. The receiver alignment is the same, but I suspect the transmitter section is different, however I have not verified that.
I personally prefer the 751/851 when driving an amplifier due to the lower power output range.
--
73, Steve W9TN
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On 3/10/25 8:35 PM, John via groups.io wrote: There is a good comparison in the TKR section of RB. Basically the TKR851 is the same vintage as the TKR850 version 2 which gives a few improved? features that the TKR850 version (1) does not have, including different, improved? programming software.(KPG91)
?Very nice repeater with great repeat audio if you use the built in controller which only does CW ID , hang time and time out as well as TT control of repeat disable/ enable- just the very basic control.
John
On 03/10/2025 7:21 PM EDT Ken Arck AH6LE via groups.io <ken@...> wrote:
The 751/851 were originally the "European" versions but JVCKenwood brought them into the US market a few years before the line was discontinued.
The ONLY difference between the 750/850 and the 751/851 was the maximum power - 25 watts but it was spec'd at continuous duty at this level (same as the 750/850). Also, there was never such a thing as a non Version2 751/851 as they shared most of the hardware and firmware with the Version 2 750/850.
And they all use the KPG-91D software
Hope this helps
Ken
At 03:42 PM 3/10/2025, you wrote:
what is the difference between an 850 and an 851?
Butch Bussen
WA0VJR
butchb@... <mailto:butchb@...>
irlp 7135
allstar 56023
echolink 790800
----- Original Message -----
*From:* Chad Nelson <mailto:chad.nelson71@...>
*To:* [email protected] <mailto:[email protected]>
*Sent:* Monday, March 10, 2025 1:54 PM
*Subject:* [repeater-builder] TKR 851 repeater for sale
I have a Kenwoot TKR 851 UHF repeater for sale. It is a 25W unit but set for 12 watts since I was told the last owner used it on an amp. Repeater is in good shape although I never put it on the air but I was told it works great.
$600 shipped.
Thanks
Chad
------------------------------------------------------------------------------
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!"
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Seeking Motorola MX300 series channel elements on GMRS frequencies
If you might have some of the KXN-1039 channel elements on GMRS repeater transmit (462 MHz) or repeater receiver (467 MHz) frequencies, please drop me a line. spencer12345@... Thanks!
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 ? 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.?
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
|
Karl, no technical measurements have been made.?
tnx Mike / K5JR? Alpharetta GA
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On Mar 10, 2025, at 11:41?PM, Karl Shoemaker via groups.io <srg734@...> wrote: ? I'll keep that in mind, Mike since this is the first time I heard of this. Perhaps in my searching I passed it by because of the lenght.? Did you happend to measure the return loss?
--
-
Regards, Karl Shoemaker
To contact me, please visit SRG's web site at?
for the current email address.
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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
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Re: Motorola DMR Repeaters
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
|
I'll keep that in mind, Mike since this is the first time I heard of this. Perhaps in my searching I passed it by because of the lenght.? Did you happend to measure the return loss?
--
-
Regards, Karl Shoemaker
To contact me, please visit SRG's web site at?
for the current email address.
|
Re: Motorola R2600 VGA Output
There’s a software pack for the D revision of the 2600 series on Repeater Builder if you know where to look. I’ve tried it on my 2600C and it didn’t work. I know the 2670s are different and the software pack should work on any revision of the 2670. There’s a guy that works on these all the time, I know his name is John (can’t remember the last name or call) that I think owns Northcomm Technology that would be able to better describe it. Or just search up more about it.
?
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Kevin Custer
Chris Boone WB5ITT
Karl Shoemaker
Jared Smudde