Re: Kenwood NXR 810 repeater
Bob, ?I use a USB to DB9 adapter, then a standard modem cable (DB9 to DB25). Works great for both the Kenwood repeaters and the ARCOM controller.?
Tom
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On Apr 4, 2025, at 7:49?PM, Bob Dengler <no6b@...> wrote:
?
At 4/4/2025 04:09 PM, you wrote:
That would work too but the only
time that connection is absolutely necessary is when uploading firmware
to the repeater (same as the TKRs). Otherwise, the DB25 on the back panel
is fine (straight through, non null modem connection)
Ken
Ahh I see: Kenwood was smart & made the serial pins the same as the
standard DB-25 serial connection.? But since they stopped putting
DB-25s on PCs about 30 years ago I don't have DB-25 serial cables
anymore.? I do happen to have some DE-9 to DB-25 adapters that I
haven't thrown out yet; guess they're good for something now.
Bob NO6B
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Re: Where did db Products go?
At 4/4/2025 05:37 PM, you wrote:
By the way the proper spelling
should be and db Spectra "claims" they carry them, which was
my source of confusion. I'll stay with Comscope.
Best to refer to them as Decibel Products as there are a lot of DB
Products cos. out there, including one I once bought switches
from:
<>
Bob NO6B
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Re: Kenwood NXR 810 repeater
At 4/4/2025 04:09 PM, you wrote:
That would work too but the only
time that connection is absolutely necessary is when uploading firmware
to the repeater (same as the TKRs). Otherwise, the DB25 on the back panel
is fine (straight through, non null modem connection)
Ken
Ahh I see: Kenwood was smart & made the serial pins the same as the
standard DB-25 serial connection.? But since they stopped putting
DB-25s on PCs about 30 years ago I don't have DB-25 serial cables
anymore.? I do happen to have some DE-9 to DB-25 adapters that I
haven't thrown out yet; guess they're good for something now.
Bob NO6B
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Re: Where did db Products go?
By the way the proper spelling should be and db Spectra "claims" they carry them, which was my source of confusion. I'll stay with Comscope.
--
-
Regards, Karl Shoemaker
To contact me, please visit SRG's web site at?
for the current email address.
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Attempting to program a Maxon SM2150. Looking for proper prog cable. Have software.
?
---------- Original Message ----------
From: "TIM HARDY via groups.io" <w7trh@...>
Date: 04/04/2025 4:02 PM PDT
Subject: [repeater-builder] Attempting to program a Maxon SM2150. Looking for proper prog cable. Have software.
?
?
Attempting to program a Maxon SM2150. I have software but having a tough time locating a programming cable.
The information I find tells me the SM 2000 series requires Maxon SMP 2000 programming cable.
I'm prepared to purchase a cable (or borrow).
It is my understanding that the prog. cable plugs into the mike socket (RJ). My SM 2150 has a 15 pin connector directly above the +12 VDC wires. Would this be a prog. connection? I have no info on this connector. Having the rear connector confuses things.
I'm not certain whether the radio programs thru the mic. connector or the rear connector. If the rear connector is for programming, then the SMP2000 would be an incorrect cable.
Hopefully someone will have an answer.
?
Tim
AE7TH
Vashon Is. Wa.
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Re: Where did db Products go?
Alright ! It's Comscope (one m). ?I needed to sort my files/vender and which folder (name) to make it on my PC. ?
My HDD on my PC crashed hard last fall so, I lost a lot of files; since dummy here, did not performed backups. ?There was a huge gouge in the two top platters of this 1 TB drive. ?Yike's !
Now, I'm on to finding those cool insulation washers Doug pointed me to.
--
-
Regards, Karl Shoemaker
To contact me, please visit SRG's web site at?
for the current email address.
|
Re: F/S TPL PA6-1AE UHF amp
Thanks, Joanne I agree Chad Nelson WI9HF/WRPL979 Janesville Wisconsin 608-754-8671 Send from my spectrum iPhone 16.
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On Apr 4, 2025, at 7:01?PM, Joe Burkleo via groups.io <jburkleo@...> wrote:
? Chad,
I think you have made the correct decision.
?
Glad Ken chimed in also. Ken is a Kenwood dealer and also sold TPL amps back in the day. I have purchased several TKR-750 and 850's from him and a few TPL amps as well.
?
Do like Ken suggested, start at 1 watt and bump it up until you are where you want to be for power out. Once you get to that point, have your guy look at it on a spectrum analyzer to make sure the amp is happy.
?
Joe - WA7JAW
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I have a few of these LMM 220 amplifiers.?
I drive it with .05w and it gives me 113W or so output. From the analyzer it looks very clean.
Of course these amps were not made for FM.
I have seen a few past posts where people would talk about these and several are in use, but there is only one post where someone said to bypass a capacitor to use on fm. No mention what cap he is referring to. For those who are familiar with this amp, enlighten me on your expirence or knowledge.
?
It would be real nice to convert the exciter and receiver to fm! That’s fairyland thinking…
?
73 WZ5TX
?
?
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Re: F/S TPL PA6-1AE UHF amp
Chad,
I think you have made the correct decision.
?
Glad Ken chimed in also. Ken is a Kenwood dealer and also sold TPL amps back in the day. I have purchased several TKR-750 and 850's from him and a few TPL amps as well.
?
Do like Ken suggested, start at 1 watt and bump it up until you are where you want to be for power out. Once you get to that point, have your guy look at it on a spectrum analyzer to make sure the amp is happy.
?
Joe - WA7JAW
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Re: Kenwood NXR 810 repeater
That would work too but the only time that connection is absolutely
necessary is when uploading firmware to the repeater (same as the TKRs).
Otherwise, the DB25 on the back panel is fine (straight through, non null
modem connection)
Ken
At 04:03 PM 4/4/2025, you wrote:
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At 4/4/2025 03:19 PM, you
wrote:
Hi Bob
It requires their KPG-129DK software and just a regular ol' serial
connection to its back panel DB25
Ken
I thought I used the same cable that I use to program my TK-880s &
TKR-850s on my club's NXR-810: 8 pin modular.
Bob NO6B
------------------------------------------------------------------------------
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!"
![[]](http://www.arcomcontrollers.com/arcom.png)
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Re: Kenwood NXR 810 repeater
At 4/4/2025 03:19 PM, you wrote:
Hi Bob
It requires their KPG-129DK software and just a regular ol' serial
connection to its back panel DB25
Ken
I thought I used the same cable that I use to program my TK-880s &
TKR-850s on my club's NXR-810: 8 pin modular.
Bob NO6B
|
Attempting to program a Maxon SM2150. Looking for proper prog cable. Have software.
Attempting to program a Maxon SM2150. I have software but having a tough time locating a programming cable.
The information I find tells me the SM 2000 series requires Maxon SMP 2000 programming cable.
I'm prepared to purchase a cable (or borrow).
It is my understanding that the prog. cable plugs into the mike socket (RJ). My SM 2150 has a 15 pin connector directly above the +12 VDC wires. Would this be a prog. connection? I have no info on this connector. Having the rear connector confuses things.
I'm not certain whether the radio programs thru the mic. connector or the rear connector. If the rear connector is for programming, then the SMP2000 would be an incorrect cable.
Hopefully someone will have an answer.
?
Tim
AE7TH
Vashon Is. Wa.
|
Attempting to program a Maxon SM2150. Can't locate programming cable
Hello,
Attempting to program a Maxon SM2150. I have software but having a tough time locating a programming cable.
The information I find tells me the SM 2000 series requires Maxon SMP 2000 programming cable.
I'm prepared to purchase a cable (or borrow).
It is my understanding that the prog. cable plugs into the mike socket (RJ). My SM 2150 has a 15 pin connector directly above the +12 VDC wires. Would this be a prog. connection? I have no info on this connector. Having the rear connector confuses things.
I'm not certain whether the radio programs thru the mic. connector or the rear connector. If the rear connector is for programming, then the SMP2000 would be an incorrect cable.
Hopefully someone will have an answer.
?
Tim
AE7TH
Vashon Is. Wa.
?
|
Re: Kenwood NXR 810 repeater
Hi Bob
It requires their KPG-129DK software and just a regular ol' serial
connection to its back panel DB25
Ken
At 02:15 PM 4/4/2025, you wrote:
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Hello everyone
Question regarding a NXR810 repeater,
What cables & software are needed to reprogram the repeater, also
dose Kenwood use an interface box like the older Motorola rib box?.
Thanks
Bob KD6GNB
------------------------------------------------------------------------------
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!"
|
Hello everyone
Question regarding a NXR810 repeater,
What cables & software are needed to reprogram the repeater, also dose Kenwood use an interface box like the older Motorola rib box?.
Thanks
Bob KD6GNB
|
Re: Capacitors in DB4332B and DB4333B
About a year later after that I needed two additional UHF LPFs and did build
two additional clones that also worked perfectly. The attached picture shows
the original LPF at the top, and one of my clones in the blue box at the
bottom. Nice clean work there. I'll make a suggestion, and it's not specific to this project, but one of those "makes perfect sense" things that applies in many cases where you have high-level RF through multiple inductors in series such as in an LC low-pass filter: Wind all of the inductors on one contiguous piece of wire. You greatly reduce the risk of a solder joint failure due to overheating or thermal cycling with the wire carrying most of the current rather than the solder joint doing it. --- Jeff WN3A
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Re: Capacitors in DB4332B and DB4333B
About 3 years back I had one DB4332-B UHF low pass filer but needed two, so decided to reverse engineer it and build a clone. The variable piston capacitors are Johanson 0.8 - 10Pf rated at 150V. Back then I found several sellers on ebay offering them, and there was one selling them in 4 packs for $25 plus some shipping. The trimmer cap model I used was PC25J100. The model is stamped onto the top solder side of the cap, so usually not possible to see in the original LPF. Just checked on ebay but original listing is gone, however looks like listing #256220267439 is the same guy still offering those trimmer caps in packs of 4 still at the same price.
The 3 coils are made of #18 wire, one side being 2T, the middle one 3.5T and the last one again 2T. Coil diameter is 7/32 or about 5.55m, stretched out same as the original coils.
I also managed to find on ebay someone selling the identical metal boxes (Pomona model 2413) for $10-15 new old stock in the original bag and with connectors on each end, but these instead had one SO-239 and one PL259, which both where very easy to replace with NM/NF. I then also had to drill the four holes to mount the trimmer caps and assemble everything. The clone LPF was then checked on a VNA and compared to the original DB4332 and it had basically identical characteristics as the original one, and of course also tuned up just fine.
About a year later after that I needed two additional UHF LPFs and did build two additional clones that also worked perfectly. The attached picture shows the original LPF at the top, and one of my clones in the blue box at the bottom.
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Re: F/S TPL PA6-1AE UHF amp
Not a problem with 100w into the cable and only 30w dissipated over 18ft of RG-142, and the connectors would be usually be heatsinked to a chassis of some sort anyway. Belden RG-142 is rated up to 1,100w at 400MHz where it would eventually reach 200deg C (392deg F) and possibly melt 60/40 solder depending on connector heatsinking. I wish I had an amplifier to test that some day.?
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Re: UHF Repeater Input Frequency Issues
Unlike the CATV world, where splitters are common and a splitter can have a variety of different drop/tap levels, splitters are not as frequently used, and when they are, the are usually referred to as power dividers. The goal being, equal division of power to two or more antennas. Additionally, “splitting” requires attention to impedance. ? If you find what appears to be a “4 port splitter” at a ham fest, it probably isn’t. Generally these are a hybrid, used to combine amplifiers or perform a 90 degree phase shift (for circular polarization.) Similarly, at a recent fest I found a single load isolator (3 port) with no labeling that was tagged “splitter” by the seller. So be cautious if you don’t know exactly what a device is – many do not. ? Matt AL0R ?
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From: [email protected] <[email protected]> On Behalf Of Jason Weisberger via groups.io
Sent: Friday, April 4, 2025 05:56
To: [email protected]
Subject: Re: [repeater-builder] UHF Repeater Input Frequency Issues ? On Thu, Apr 3, 2025 at 06:49 PM, Matt wrote: A preselector is simply a band pass filter. A splitter is….. a splitter. ? Matt AL0R ? From: [email protected] <[email protected]> On Behalf Of Jason Weisberger via groups.io
Sent: Thursday, April 3, 2025 18:21
To: [email protected]
Subject: Re: [repeater-builder] UHF Repeater Input Frequency Issues ? On Thu, Apr 3, 2025 at 01:04 PM, Charles Adams wrote: Just curious, why do you have an eight way splitter in line to the receiver. The preamp is there to offset the loss in the splitter. Try eliminating both, but not the preselector. Industrial Communications Co.
On Thu, Apr 3, 2025 at 12:17 PM, Mike wrote: I'm curious what the 8-way divider was feeding in addition to the DR-2X??
? That 8-way split was integrated into the Sinclair Preamp.? See attached pic.
? Can you please elaborate on preselector vs splitter?? I assume you're calling a splitter what I've been calling a preamp sure to the split output.? Is a preselector then a receive amp without the integrated split?
? Thanks.? I come from the CATV world prior to ham radio.? The splitter terminology is very familiar, but every little corner of the RF world uses just slightly different language at times.? Was just checking.? ? I wouldn't have guessed that a preselector was a bandpass instead of an active device.? ? Thanks for all the great info folks.? We're on the right track now.
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Re: F/S TPL PA6-1AE UHF amp
That loss is dissipated as heat.
You may have issues if the connectors are soldered on.
Glenn
WB4UIV
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On 4/3/2025 7:10 PM, Mike via groups.io wrote: Or 18ft of RG-142 has about 1.5dB loss.
--
-----------------------------------------------------------------------
Glenn Little ARRL Technical Specialist QCWA LM 28417
Amateur Callsign: WB4UIV wb4uiv@... AMSAT LM 2178
QTH: Goose Creek, SC USA (EM92xx) USSVI, FRA, NRA-LM ARRL TAPR
"It is not the class of license that the Amateur holds but the class
of the Amateur that holds the license"
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Karl Shoemaker
Ken Arck AH6LE
