Kenwood NXR-800 Repeaters For Sale
I have several of these very cool, high spec, 1U repeaters available. If you are looking to get into NXDN or just want a high quality repeater this is something to consider. They will easily program into the ham band but will need some VCO tweaking. I can do that for you if you provide RX and TX frequencies. These are only 5W units although a power module swap could make this into a 25W-50W unit. $500 including shipping to lower 48. Thanks!
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Re: Motorola R100 eeproms or lack of them
The R-1801 is a suitcase programmer. ?
The R-100 is a small Motorola repeater built from 2 modified mobiles. ? See:?
I believe the OP is looking for a piece of software that can program a new EEPROM to replace a bad one. ?(A piece of software that I wish I had)
Hope that helps,
Will
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On Mar 21, 2025, at 7:38?PM, MILLIN SEE via groups.io <motorolarentals@...> wrote:
? I believe that R100 is a suitcase Programmer----- Original Message -----From: Pienari via groups.io <ssb27.2020@...>To: [email protected]Sent: Fri, 21 Mar 2025 12:42:44 -0600 (MDT)Subject: [repeater-builder] Motorola R100 eeproms or lack of themHi.Have anyone make-cp.exe for R100 ?.
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Motorola Quantar 5MHz Reference Ultra High Stability Oscillator CLN1477A
Are the subject modules of any value for HAM use on VHF Analog Quantar repeaters?
?
?
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Re: Motorola R100 eeproms or lack of them
I believe that R100 is a suitcase Programmer
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----- Original Message ----- From: Pienari via groups.io <ssb27.2020@...> To: [email protected]Sent: Fri, 21 Mar 2025 12:42:44 -0600 (MDT) Subject: [repeater-builder] Motorola R100 eeproms or lack of them Hi. Have anyone make-cp.exe for R100 ?.
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Motorola R100 eeproms or lack of them
Hi.
Have anyone make-cp.exe for R100 ?.
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Re: Testing a WACOM WP-678-R2 with a Nanovna-F
Thank you!!!
Mick - W7CAT
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----- Original Message ----- From: "Bob KK6RQ via groups.io" To: [email protected]Sent: Friday, March 21, 2025 03:46:42 AM Subject: Re: [repeater-builder] Testing a WACOM WP-678-R2 with a Nanovna-F Don't conflate "diplexer" (those solid metal box fixed-filters that let you put a dualband radio with separate VHF/UHF ports to a single dualband antenna or vice-versa) with a "duplexer" (what you're trying to tune for your repeater)
-- Untitled Document
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Re: Testing a WACOM WP-678-R2 with a Nanovna-F
If your checking through loss of the pass and the notch is accidently too close in frequency it will add more insertion loss. Just make sure the notch is set at the correct offset before measuring overall insertion loss.?
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Re: Testing a WACOM WP-678-R2 with a Nanovna-F
You're welcome, Don.
One clarification....
The WACOM series of duplexers generally were provided with
variable capacitors with enough range to allow the filter to be
configured with the notch either above or below the pass
frequency.? In other words - each side of the duplexer can be
configured for LPHR or HPLR.
One comment....
1.35 dB insertion loss per cavity seems suspect.? I would have
expected it to be 0.5 dB, resulting in a total cabled loss of
around 1.4 dB or less.? You didn't mention what your total cabled
parameters ended up being - so you may want to let us know.
Kevin W3KKC
On 3/20/2025 11:02 PM, Don Roden wrote:
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Thanks Kevin,
This was a diplexer that was on my 443 repeater.? ?I bought
the repeater/diplexer as a package years ago.
It always had a 25% reflected out of the transmitter.? ? I
had been looking at some broadcast FM filters with notches, and
before I put the Nanovna up, I thought this would be a good time
to look at the WACOM.? The S11 looked horrible.. not at all as I
expected.? ?I purchased the repeater years before the Nanovna
was introduced.
?
I found that the capacitors? were on the wrong frequency side
of the notch? ( all these years ) .... After I saw the effects
of the capacitor, it took a few back and fourths to get the null
and the broad peak separated by 5Mhz .? ?By the way, the
Nanovna-F was calibrated nuts-on on both 443Mhz and 448Mhz.? ?
-1.35 and -21.25? were the single cavity readings.
Combined, there was some minor tweaking that had both notches
aligned and both rejects aligned.? ? I tightened everything up
and the notches stayed on frequency.
Back in-line and zero reflected on the transmitter. Great !!?
?I'm looking forward to seeing a much improved range on the
repeater.? ? Thanks Again Kevin
Don W4DNR? ? WA4NPL/R? 443Mhz
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Re: Testing a WACOM WP-678-R2 with a Nanovna-F
Don't conflate "diplexer" (those solid metal box fixed-filters that let you put a dualband radio with separate VHF/UHF ports to a single dualband antenna or vice-versa) with a "duplexer" (what you're trying to tune for your repeater)
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Re: Testing a WACOM WP-678-R2 with a Nanovna-F
Thanks Kevin,
This was a diplexer that was on my 443 repeater.? ?I bought the repeater/diplexer as a package years ago.
It always had a 25% reflected out of the transmitter.? ? I had been looking at some broadcast FM filters with notches, and before I put the Nanovna up, I thought this would be a good time to look at the WACOM.? The S11 looked horrible.. not at all as I expected.? ?I purchased the repeater years before the Nanovna was introduced.
?
I found that the capacitors? were on the wrong frequency side of the notch? ( all these years ) .... After I saw the effects of the capacitor, it took a few back and fourths to get the null and the broad peak separated by 5Mhz .? ?By the way, the Nanovna-F was calibrated nuts-on on both 443Mhz and 448Mhz.? ? -1.35 and -21.25? were the single cavity readings.
Combined, there was some minor tweaking that had both notches aligned and both rejects aligned.? ? I tightened everything up and the notches stayed on frequency.
Back in-line and zero reflected on the transmitter. Great !!? ?I'm looking forward to seeing a much improved range on the repeater.? ? Thanks Again Kevin
Don W4DNR? ? WA4NPL/R? 443Mhz
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Re: Does anyone have a manual or schematic for the Helper Instruments PS 250
Mike,
I found that page on rptrbldr also.
Its not much but better than nuthin.
Thanks for the bit of history. I didn't know that before.
I have one of the Helper millivoltmeters. It sure works well for me.
Sure are a lot for sale on Ebay without the probe. Fortunately I got one at a reasonable price with the probe.
Did you see that design for a homebuilt probe? Somewhere here on rptrbldr I think.
thanks again.
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Re: Testing a WACOM WP-678-R2 with a Nanovna-F
On Mar 20, 2025, at 10:26?PM, pu5aom.t via groups.io <pu5aom.t@...> wrote:
?
Hello,
What would a 3 dB pad be? <— 3dB fixed attenuator.
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Re: Testing a WACOM WP-678-R2 with a Nanovna-F
Hello, Chris Boone WB5ITT!
?
Is the service monitor better than a NANO VNA for cavity tuning?
?
?
Na quarta-feira, 19 de mar?o de 2025 às 17h16, Chris Boone WB5ITT escreveu:
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Its nice to have the Quantar channel selector module when programming a bunch of frequencies to test.?
?
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I’m surprised it didn’t work. ?
I have a range 2 in 146.13/73
Works perfect. ?No mods. ?
Will
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On Mar 20, 2025, at 5:00?PM, Jeff Acree via groups.io <locustpointlight@...> wrote:
? Friends,
?
I have a gold colored VHF Range 2 Quantar on my bench.? I am using RVN5002 Version R14.10.00.? My Quantar is currently programmed for frequencies in the mid-150s.? After powerup the RX and TX VCOs are happy and the station appears to be green.? I did a quick test to see if it would be happy with a TX frequency of 146.895 MHz and a receive frequency of 146.295 MHz.? ?With those frequencies, the TX and RX VCOs failed to lock which was disappointing but not much of a surprise.? I wrote the original commercial band code plug back to the unit and it is happy again.? I realize we really need the Range 1 VHF equipment, but that seems to be rather scarce.? The range? 2 equipment is readily available to me.? I have noted that may HAMS seem to be using the Range 2 units for pairs above 146 MHz.? Four of the five repeaters on our system are above 146 MHz, so I was hoping to use this.? Is it practical?? I have a fair amount of equipment including an HP8935 and a 8920 and a decent RF lab to work in.
?
Is it safe to assume all the VHF Quantars under $1000 on ebay are Range 2 units.? Most of the vendors either do not know or do not want to advertise what they actually have.? I could not find even one that claims to be VHF Range 1.
?
Thanks!
Jeff KC8VFN
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First program a number of receive and transmit frequencies so you can write down the current VCO voltage on a table before modification.
Then use a proper size tuning tool and try giving the lower numbered VCO coils in the exciter and receiver exactly one turn at a time lowering the ferrite slug and see if you can get a lock to occur.
Ideally the VCOs want to be between 2.5 and 7.5 volts.
On Thu, Mar 20, 2025, 17:00 Jeff Acree via <locustpointlight= [email protected]> wrote: Friends,
?
I have a gold colored VHF Range 2 Quantar on my bench.? I am using RVN5002 Version R14.10.00.? My Quantar is currently programmed for frequencies in the mid-150s.? After powerup the RX and TX VCOs are happy and the station appears to be green.? I did a quick test to see if it would be happy with a TX frequency of 146.895 MHz and a receive frequency of 146.295 MHz.? ?With those frequencies, the TX and RX VCOs failed to lock which was disappointing but not much of a surprise.? I wrote the original commercial band code plug back to the unit and it is happy again.? I realize we really need the Range 1 VHF equipment, but that seems to be rather scarce.? The range? 2 equipment is readily available to me.? I have noted that may HAMS seem to be using the Range 2 units for pairs above 146 MHz.? Four of the five repeaters on our system are above 146 MHz, so I was hoping to use this.? Is it practical?? I have a fair amount of equipment including an HP8935 and a 8920 and a decent RF lab to work in.
?
Is it safe to assume all the VHF Quantars under $1000 on ebay are Range 2 units.? Most of the vendors either do not know or do not want to advertise what they actually have.? I could not find even one that claims to be VHF Range 1.
?
Thanks!
Jeff KC8VFN
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I have a spare R1 RX module. Contact me offlist
Ken
At 05:00 PM 3/20/2025, you wrote:
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Friends,
?
I have a gold colored VHF Range 2 Quantar on my bench.? I am using
RVN5002 Version R14.10.00.? My Quantar is currently programmed for
frequencies in the mid-150s.? After powerup the RX and TX VCOs are
happy and the station appears to be green.? I did a quick test to
see if it would be happy with a TX frequency of 146.895 MHz and a receive
frequency of 146.295 MHz.?? With those frequencies, the TX and
RX VCOs failed to lock which was disappointing but not much of a
surprise.? I wrote the original commercial band code plug back to
the unit and it is happy again.? I realize we really need the Range
1 VHF equipment, but that seems to be rather scarce.? The
range? 2 equipment is readily available to me.? I have noted
that may HAMS seem to be using the Range 2 units for pairs above 146
MHz.? Four of the five repeaters on our system are above 146 MHz, so
I was hoping to use this.? Is it practical?? I have a fair
amount of equipment including an HP8935 and a 8920 and a decent RF lab to
work in.
?
Is it safe to assume all the VHF Quantars under $1000 on ebay are Range 2
units.? Most of the vendors either do not know or do not want to
advertise what they actually have.? I could not find even one that
claims to be VHF Range 1.
?
Thanks!
Jeff KC8VFN
------------------------------------------------------------------------------
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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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Friends,
?
I have a gold colored VHF Range 2 Quantar on my bench.? I am using RVN5002 Version R14.10.00.? My Quantar is currently programmed for frequencies in the mid-150s.? After powerup the RX and TX VCOs are happy and the station appears to be green.? I did a quick test to see if it would be happy with a TX frequency of 146.895 MHz and a receive frequency of 146.295 MHz.? ?With those frequencies, the TX and RX VCOs failed to lock which was disappointing but not much of a surprise.? I wrote the original commercial band code plug back to the unit and it is happy again.? I realize we really need the Range 1 VHF equipment, but that seems to be rather scarce.? The range? 2 equipment is readily available to me.? I have noted that may HAMS seem to be using the Range 2 units for pairs above 146 MHz.? Four of the five repeaters on our system are above 146 MHz, so I was hoping to use this.? Is it practical?? I have a fair amount of equipment including an HP8935 and a 8920 and a decent RF lab to work in.
?
Is it safe to assume all the VHF Quantars under $1000 on ebay are Range 2 units.? Most of the vendors either do not know or do not want to advertise what they actually have.? I could not find even one that claims to be VHF Range 1.
?
Thanks!
Jeff KC8VFN
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Re: Steps to setup a MTR2000 internal repeater mode
If you need help, I'll email you my cell and can walk you thru it with my RSS open
On Thu, Mar 20, 2025, 5:28 PM Chris Boone WB5ITT via <setxtelecom= [email protected]> wrote: You don't change it in the service windows. In your last picture where it shows messages, click on edit and then if I recall station... That's where you change frequency, etc.
No option to change channel info when you read the system and now I got a red light  
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Kevin Custer
Ken Arck AH6LE
Chris Boone WB5ITT