To the best of my knowledge, the 751/851 production was close in alignment to the 750/850 version 2.
I'll defer to others here who own/operate/run Kenwood shops.
Jeremy K1LFK
On Mon, Mar 31, 2025, 5:52?PM Chad Nelson via <chad.nelson71= [email protected]> wrote: Thanks, Jeremy that's good to know. I mentioned it to my radio guy. He didn't know much about the 851, so maybe that shop to deal with many of those. Do you know how oldthose radios are approximately? I'm talking about the manufacture dates of the TKR 851? Chad Nelson WI9HF/WRPL979 Janesville Wisconsin 608-754-8671 Send from my spectrum iPhone 16. On Mar 31, 2025, at 5:48?PM, Jeremy Hansen via <jeremyhansen27=[email protected]> wrote:
? With the TKR-851 being designed for 1-25w operation, that's probably your best candidate for this application. I have two of them set aside here for future projects that require an external PA.? On Mon, Mar 31, 2025, 5:31?PM Chad Nelson via <chad.nelson71= [email protected]> wrote: Should've mentioned this in the message, but I have the 850 version two, and a TKR 851. Chad Nelson WI9HF/WRPL979 Janesville Wisconsin 608-754-8671 Send from my spectrum iPhone 16. ? Chad,
If your TKR-850 is a Version 2 radio, the output should be stable at 5 watts in the low power setting. I have ran them as low as 1 watt and never had a problem.
?
The early radios prior to the Version 2 series did have PA issues, but many of those were updated with a new PA deck under a Service Bulletin procedure by Kenwood.
?
Joe - WA7JAW
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Before this goes to Ebay....
Anyone have need for a TxRx Model 89-96-90210 (that last part cracks me up) Preselector for 929-932?
Pics attached------------------------------------------------------------------------------
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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Thanks, Jeremy that's good to know. I mentioned it to my radio guy. He didn't know much about the 851, so maybe that shop to deal with many of those. Do you know how oldthose radios are approximately? I'm talking about the manufacture dates of the TKR 851? Chad Nelson WI9HF/WRPL979 Janesville Wisconsin 608-754-8671 Send from my spectrum iPhone 16.
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On Mar 31, 2025, at 5:48?PM, Jeremy Hansen via groups.io <jeremyhansen27@...> wrote:
? With the TKR-851 being designed for 1-25w operation, that's probably your best candidate for this application. I have two of them set aside here for future projects that require an external PA.? On Mon, Mar 31, 2025, 5:31?PM Chad Nelson via <chad.nelson71= [email protected]> wrote: Should've mentioned this in the message, but I have the 850 version two, and a TKR 851. Chad Nelson WI9HF/WRPL979 Janesville Wisconsin 608-754-8671 Send from my spectrum iPhone 16. ? Chad,
If your TKR-850 is a Version 2 radio, the output should be stable at 5 watts in the low power setting. I have ran them as low as 1 watt and never had a problem.
?
The early radios prior to the Version 2 series did have PA issues, but many of those were updated with a new PA deck under a Service Bulletin procedure by Kenwood.
?
Joe - WA7JAW
|
With the TKR-851 being designed for 1-25w operation, that's probably your best candidate for this application. I have two of them set aside here for future projects that require an external PA.?
On Mon, Mar 31, 2025, 5:31?PM Chad Nelson via <chad.nelson71= [email protected]> wrote: Should've mentioned this in the message, but I have the 850 version two, and a TKR 851. Chad Nelson WI9HF/WRPL979 Janesville Wisconsin 608-754-8671 Send from my spectrum iPhone 16. ? Chad,
If your TKR-850 is a Version 2 radio, the output should be stable at 5 watts in the low power setting. I have ran them as low as 1 watt and never had a problem.
?
The early radios prior to the Version 2 series did have PA issues, but many of those were updated with a new PA deck under a Service Bulletin procedure by Kenwood.
?
Joe - WA7JAW
|
Should've mentioned this in the message, but I have the 850 version two, and a TKR 851. Chad Nelson WI9HF/WRPL979 Janesville Wisconsin 608-754-8671 Send from my spectrum iPhone 16.
toggle quoted message
Show quoted text
On Mar 31, 2025, at 5:30?PM, Joe Burkleo via groups.io <jburkleo@...> wrote:
? Chad,
If your TKR-850 is a Version 2 radio, the output should be stable at 5 watts in the low power setting. I have ran them as low as 1 watt and never had a problem.
?
The early radios prior to the Version 2 series did have PA issues, but many of those were updated with a new PA deck under a Service Bulletin procedure by Kenwood.
?
Joe - WA7JAW
|
Chad,
If your TKR-850 is a Version 2 radio, the output should be stable at 5 watts in the low power setting. I have ran them as low as 1 watt and never had a problem.
?
The early radios prior to the Version 2 series did have PA issues, but many of those were updated with a new PA deck under a Service Bulletin procedure by Kenwood.
?
Joe - WA7JAW
|
Bypass the pre driver board...the driver board is 8 to 15watts input....that's the PA6-1BE model
Chris WB5ITT
Might be safer to throw an attenuator in line.?
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Might be safer to throw an attenuator in line.?
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Re: THREAT TO 222-225MHz Spectrum
Consider this is a test of our resolve by those who stand to gain financial gain from the selling of the spectrum.? They will infringe on the known spectrum of radio amateurs to see how many squawk and file paperwork with their regional FCC Field office and then with the FCC HQ.? If the noise is weak to moderate, they move forward with their intended agenda to confiscate that particular section of spectrum at a very advantageous price.? Get busy writing to your Regional Field Office and the National HQ of the FCC and demand the protection of our spectrum that is used for a public service of backup communications.
Best Regards, Michael L Robinson, KC0TA
Trustee - K5HLA/R, Burnet County Texas
“In the beginning of a change the Patriot is a scarce man, and brave, and hated and scorned. When his cause succeeds, the timid join him, for then it costs nothing to be a Patriot.”
― Mark Twain
When Tyranny becomes Law, Revolution becomes Duty!
On Mon, Mar 31, 2025 at 2:24?PM Hudson, John@CalOES via <john.hudson= [email protected]> wrote:
I consider this a National Threat because it started in Los Angeles where it’s cause great interference to the 222-225MHz spectrum and is now moving to Southwestern Arizona. Please remember Amateur Radio is primary on this spectrum, we do not share it will
the military. This experimentation should be conducted on NTIA Frequencies in military assigned spectrum Not Radio Amateur spectrum. While some HAMs don’t use the 222 MHz spectrum like other areas do it’s still spectrum assigned to us and where operations
such as pavepaws military UHF Radar has reduced UHF HAM operations, Note Sacramento, CA the 222-225MHz is a viable band for weak signal and repeater operations without radar.
If you experience interference, please use the link included in my letter to submit a complaint it’s the only way to stop the incursion and protect our spectrum.
John N. Hudson III, WA6HYQ
?
This Message is From an External Sender
This message came from outside your organization.
+1 to that.
?
You know, the ARRL isn't the end-all, be-all of amateur radio. No reason that a well-meaning group couldn't start another national association and weed out the corporate greed.
?
Chris/AJM
?
On Sun, Mar 30, 2025 at 11:30 AM, Mike Besemer - WM4B wrote:
I’m sure the ARRL is sitting there, wringing their hands and planning the next batch of mailings to go out and pander for additional funds.
?
Mike
WM4B
?
--
Chris Baldwin, CETSr. (KF6AJM)
Trustee - MetroNET Cal. Intertie (KB3PX)
WARNING: Do not click links or attachments unless you recognize
the sender and know the email is safe.
|
Hi all, ? I have the TPL PA6-1AE UHF repeater amp in stock here. Curious if anyone knows if the imput drive can be adjusted to support 10W drive instead of 5W? ? A radio tech looked at it and said that Kenwood TKR 850 repeaters don’t drive that amp well at 5 watts because the output at the low power setting bounces around and it can vary above 5W and fry the amp. ? If I can’t find any documentation on how to increase the drive input I will be looking for an amp that will accept 10W input, and have my current one up for sale. ? Thanks, ? Chad ?
|
Re: THREAT TO 222-225MHz Spectrum
I consider this a National Threat because it started in Los Angeles where it’s cause great interference to the 222-225MHz spectrum and is now moving to Southwestern Arizona. Please remember Amateur Radio is primary on this spectrum, we do not share it will
the military. This experimentation should be conducted on NTIA Frequencies in military assigned spectrum Not Radio Amateur spectrum. While some HAMs don’t use the 222 MHz spectrum like other areas do it’s still spectrum assigned to us and where operations
such as pavepaws military UHF Radar has reduced UHF HAM operations, Note Sacramento, CA the 222-225MHz is a viable band for weak signal and repeater operations without radar.
If you experience interference, please use the link included in my letter to submit a complaint it’s the only way to stop the incursion and protect our spectrum.
John N. Hudson III, WA6HYQ
toggle quoted message
Show quoted text
On Mar 31, 2025, at 11:13, Chris Baldwin via groups.io <vtat1271@...> wrote:
?
This Message is From an External Sender
This message came from outside your organization.
+1 to that.
?
You know, the ARRL isn't the end-all, be-all of amateur radio. No reason that a well-meaning group couldn't start another national association and weed out the corporate greed.
?
Chris/AJM
?
On Sun, Mar 30, 2025 at 11:30 AM, Mike Besemer - WM4B wrote:
I’m sure the ARRL is sitting there, wringing their hands and planning the next batch of mailings to go out and pander for additional funds.
?
Mike
WM4B
?
--
Chris Baldwin, CETSr. (KF6AJM)
Trustee - MetroNET Cal. Intertie (KB3PX)
WARNING: Do not click links or attachments unless you recognize
the sender and know the email is safe.
|
Re: THREAT TO 222-225MHz Spectrum
|
Re: THREAT TO 222-225MHz Spectrum
+1 to that.
?
You know, the ARRL isn't the end-all, be-all of amateur radio. No reason that a well-meaning group couldn't start another national association and weed out the corporate greed.
?
Chris/AJM
?
On Sun, Mar 30, 2025 at 11:30 AM, Mike Besemer - WM4B wrote:
I’m sure the ARRL is sitting there, wringing their hands and planning the next batch of mailings to go out and pander for additional funds.
?
Mike
WM4B
?
--
Chris Baldwin, CETSr. (KF6AJM)
Trustee - MetroNET Cal. Intertie (KB3PX)
|
Re: Quantar Extender Cables
Uh, what? You've got a bent up chassis then. I've never had issues like that and I've worked on hundreds of the things. The SCM and WL cards can be a bit of a pain but still don't require that level of force...
?
Chris/AJM
?
On Sun, Mar 30, 2025 at 06:25 PM, Bob KK6RQ wrote:
Actually, that's pretty f@#$ing clever. What I would REALLY like to find, is the heavy nylon pry-tool that M made to pull the modules out of the chassis.
What I currently use is a square wooden dowel and tap w/a hammer from the rear.
?
--
Chris Baldwin, CETSr. (KF6AJM)
Trustee - MetroNET Cal. Intertie (KB3PX)
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Re: Antenna Thoughts and Suggestions
If you need more?info or help, email me at my call at att dot net?
Chris WB5ITT?
On Mon, Mar 31, 2025, 9:00 AM Chris Boone WB5ITT via <setxtelecom= [email protected]> wrote: Get a duplexer and go with the DB408 at the top...don't use LMR cable...get 1/2 in or bigger HELIAX...
Later you could install a remote HF radio to the UHF rptr since you are in a HOA ...would require an external controller like a RLC which can handle many serial controlled radios...I use Kenwood's myself..
Chris WB5ITT
Former BoD and Frequency Coordinator
TXVHFFM Society
By removing the tip on the DB-408, and putting the Ringo on, you are decreasing the lightning protection.?? Also, by putting the ringo on, you are also inviting lightning.?? I would instead, just install the 408 and be done with it.?? If you want to see the coverage, you can set up an account at and model there for free.
Andy Zorca WJ9J
Yes, 440 will be our first choice on frequency allocation.
?
bd
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Re: Antenna Thoughts and Suggestions
For temporary, I would just install a Comet GP3? dual band antenna.? We had one at about 250 ft for 30 yrs with no problems in operation.? When our DB224 antenna failed we moved the repeater over to the comet GP3 diplexed with a UHF link and it played just fine for 10 years until we could fund a climb. The replacement for the db224 was a Telewave with both VHF and UHF loops on the same mast. ????? ? John Lock KF0M Kf0m@... ?
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From: [email protected] <[email protected]> On Behalf Of Bill Davis AE via groups.io
Sent: Monday, March 31, 2025 7:51 AM
To: [email protected]
Subject: [repeater-builder] Antenna Thoughts and Suggestions? We are a new ham radio club (RRARC) in TX with currently 60 members living in a 55 and over retirement community.? As you can imagine, we are tightly governed by HOA rules.?? We are about to install our repeater on the roof of the community clubhouse.? The clubhouse is on a hill with line of sight to the north and east approximately 8 miles.? To the west and south approximately 25 miles. Being new, we do not have a repeater pair allocation yet.? Currently we are operating crossband, receiving on 144.650 and transmitting on 441.350.? These are test frequencies until we can get a permanent installation site and do some ERP mappings in order to request a frequency allocation.? Currently we are operating on a dual band antenna using a diplexer and a Yaesu DR-2x repeater. Here is the question and our plan.? Since we will get one shot at antenna installation, we plan to install a Kenwood DB-408-B (450) antenna.? It is 8' 5" tall.? We plan to remove the top plug and install an ARX-2b Ringo on top.? It is 12' 5" tall.? We plan to receive on the Ringo and transmit on the DB-408.? This will be a temporary solution until we and do site surveys on both 440 and 2mtr in order to request our allocation. Looking for opinions on how well this temporary crossband setup is going to work, using the top antenna for receive and the bottom for transmit with no diplexer since we'll have dual feed lines, and using the vertical stack to negate some desense.? We will be likely using 20 watts.
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Re: Antenna Thoughts and Suggestions
Get a duplexer and go with the DB408 at the top...don't use LMR cable...get 1/2 in or bigger HELIAX...
Later you could install a remote HF radio to the UHF rptr since you are in a HOA ...would require an external controller like a RLC which can handle many serial controlled radios...I use Kenwood's myself..
Chris WB5ITT
Former BoD and Frequency Coordinator
TXVHFFM Society
By removing the tip on the DB-408, and putting the Ringo on, you are decreasing the lightning protection.?? Also, by putting the ringo on, you are also inviting lightning.?? I would instead, just install the 408 and be done with it.?? If you want to see the coverage, you can set up an account at and model there for free.
Andy Zorca WJ9J
Yes, 440 will be our first choice on frequency allocation.
?
bd
|
Re: Antenna Thoughts and Suggestions
By removing the tip on the DB-408, and putting the Ringo on, you are decreasing the lightning protection.?? Also, by putting the ringo on, you are also inviting lightning.?? I would instead, just install the 408 and be done with it.?? If you want to see the coverage, you can set up an account at and model there for free.
Andy Zorca WJ9J
Yes, 440 will be our first choice on frequency allocation.
?
bd
|
Re: Antenna Thoughts and Suggestions
Yes, 440 will be our first choice on frequency allocation.
?
bd
|
Re: Antenna Thoughts and Suggestions
No, since that requires a permanent site and a site survey.
?
bd
|
Ken Arck AH6LE
Chris Boone WB5ITT
Hudson, John@CalOES
Chris Baldwin
Bill Davis AE