Re: [Repeater-Builder] UHS mastr II preamp

[Nate Duehr]

On 3/4/07, Dan <[EMAIL PROTECTED]> wrote:
> Anyone have a recommendation for a preamp for the Mastr II UHF
> repeater? I have used the stock UHS board in the past but have had 2 of
> these now fail due to the tuning slug becoming brittle with age and
> cracking/breaking. I now have 2 dead ones on my bench and a kinda deaf
> repeater. Any help? or should I just buy another UHS board and hope for
> the best.

There was just a similar question on the MASTR II list -- was that
you?  Many of us are dual-subscribed...

Anyway... our club has been using Advanced Receiver Research (ARR)
pre-amps on the VHF and UHF MASTR II's for years... but many folks
here have said so many nice things about Chip Angle's products from
AngleLinear, that we're tempted to try one on a new repeater, or do
some comparison on an old repeater...

Nate WY0X

[Repeater-Builder] Adding a notch to a uhf cavity tin

[Kerincom]

Hi guys .I am interested in adding a adjustable notch to a 6inch uhf band
pass cavity tin.can anyone suggest any information to the modification
 
Thank You,
Ian Wells,
Kerinvale Comaudio,
www.kerinvalecomaudio.com.au
 

[Repeater-Builder] Re: GMRS and FRS

[skipp025]

> I have someone in my area, about a mile away, that is 
> transmitting night and day, non-stop, on a FRS frequency 
> (channel 1, 462.5325 MHz). 

As others have stated... FRS Channel 1 is 462.5625 MHz 

> I suspect that it's someone monitoring a parent's or 
> grandparent's house. I know where the house is located. 

You won't know until you ask... why don't you ask? 

> I don't think there's a GMRS repeater in town (at least, 
> none that I can find by licensing or by radio ID) so I 
> can't test for willful interference.

There won't be gmrs repeater on that frequency... and if there 
was a problem on a gmrs slot you'd do well to forget about the 
"willful interference" poop and just find out what's going on 
if it's bothering something critical. 

Otherwise use one of the other available FRS Channels and get 
on with your life. Unless someone is causing problems just to 
be an pain in the @$$ it doesn't help to get up on the FCC License 
high horse until you really know what's going on.  And then only in 
most people's opinion if it's a real problem.

> Also, there's no tone or digital code going out, just a carrier 
> with a bit of audio once in a while...

Could be any number of devices... but they normally are not rated 
or spec to carry a mile distance but sometimes that happens.  I 
can work FRS radios 10 miles away from a repeater site. 

> So the question is, is this guy doing anything illegal by 
> broadcasting 24x7 inside a house, like an old baby monitor, on 
> a FRS frequency?

In the real world only if they are causing a "real interference 
problem" and/or using equipment the wrong way. 

> Please direct replies to me at [EMAIL PROTECTED] so as not to
> clutter up this fine resource list. Thank you.
> Ray_KBØSTN 

If you're that stuck on knowing what the transmissions are about... 
stop and ask them about it. Tell them you can hear what's going 
on at some location in/around their location/house. They might 
not even know you can hear their device so far away. 

s. 

[Repeater-Builder] Re: Kenwood TM-271A

[skipp025]

Re: Kenwood TM-271A 

> No, they can't.  I had to try to make one work at a comm. site on 
> a 5,200 ft. mountaintop.  Had a DCI bandpass filter AND a 10 dB pad 
> in front of it (the TX & RX were separated internally), but we still 
> got lots of 3rd order IMD from sources on OTHER mountaintops. 

3rd order problems from other mountaintops?  How many, how far away 
and how did you know/measure/confirm it was a 3rd order problem? 

The DCI filter is only "ok" for use in a casual application. It's not 
narrow by any means nor should it to be trusted to help a receiver 
at a very busy location.  Also depends on which dci filter you have 
and how it's installed.  The typical DCI 2 meter band filter is a
pretty wide beast. It's not going to help as well (on a busy radio 
site) as most people would expect/hope. 

> Also had problems with the IF filtering, causing the squelch to 
> close on reasonably strong signals when a strong signal 15 kHz 
> away was present. 

I'm not sure if I'd blame the IF section for the trouble unless I 
did a lot of testing. 

> In short, one of the poorest receivers I've ever worked with.  
> TX was OK though, just throw a fan on the heat sink.
> Bob NO6B

So what did replace the radio with and how well does it work? What 
type of filtering and pads did you put in front of the replacement 
radio? 

cheers, 
skipp 

[Repeater-Builder] Re: Kenwood TM-V7 display problem

[skipp025]

James, 

If you are the original owner... I was told last year that Kenwood 
will replace the display for free... even though it's out of 
warranty.  Wasn't Kenwoods fault the display didn't hold up but 
they're pretty good about dealing with fixing it. The replacement 
display is made by a different mfgr. 

Find Kenwood Amateur Radio Service on their main web page. 

cheers, 
skipp 

>
> Well, first off, i cant complain much about a free radio, but i can
> complain about how big of a POS they are.
> 
> i have a kenwood tm-v7 that has those famous lines going thru the
> display.  im sure the radio is out of warranty and im not going to pay
> kenwood to fix an obvious defect in their manufacturing process. so
> with that, my questions:
> 
> a) can it be fixed fairly simple?
> b) if no to the above, can i order a new display?
> c) if no to the above, is there any way to fix it other than sending
> it back to the factory?
> d) if no to the above, anyone want the POS? lol just kidding, id like
> to keep it and get it mounted in my car.
> 
> Thanks folks.
> kc9ikx
> James
>

Re: [Repeater-Builder] Kenwood TM-271A

[no6b]

At 3/4/2007 04:14, you wrote:
>Not a 271 but did use a TM-241 when the receiver failed on a local 2 meter 
>repeater.  Simply placed one of the "garbage can" size filters on the 
>input.  Absolutely no intermod and better sensitivity than the normal 
>MASTR II that had failed.
>
>At the same site I also use a TM-241 as a remote base controlled by an 
>FC-1 with no problems.  On the remote I have a notch filter tuned to the 
>frequency of a 1/3 KW transmitter in the 152 MHz range.
>
>There are 28 transmitters at the site and within 300 yards there are 
>another 30 transmitters on another tower.
>
>Bottom-line is they can be made to work in high RF environments but a 
>receiver with good front-end filtering will work without the need for 
>additional filtering.

No, they can't.  I had to try to make one work at a comm. site on a 5,200 
ft. mountaintop.  Had a DCI bandpass filter AND a 10 dB pad in front of it 
(the TX & RX were separated internally), but we still got lots of 3rd order 
IMD from sources on OTHER mountaintops.  Also had problems with the IF 
filtering, causing the squelch to close on reasonably strong signals when a 
strong signal 15 kHz away was present.  In short, one of the poorest 
receivers I've ever worked with.  TX was OK though, just throw a fan on the 
heat sink.

Bob NO6B

[Repeater-Builder] Antenna ID help

[Garth]

I just aquired a bunch of antenna and towers sections etc from a 
Plumbing dispatch office that went out of biz a couple of years ago.

In the inventory is a Phelps Dodge Super S'master F'glass Vert. Not 
much of the label left. But I was able to see the model # . It shows 
220-509, the antenna is 20'5½" end to end. It has a S0239 connector. I 
went to http://www.celwave.com/ and can't seem to pin it down. Would 
anyone on the group have a Phelps Dodge data sheet that has the above # 
listed?

I will thank any and all group members in advance for any insight as to 
exactly what the antenna is.

Garth

Re: [Repeater-Builder] Kenwood TM-V7 display problem

[Ken Arck]

At 06:30 PM 3/4/2007, you wrote:

>Well, first off, i cant complain much about a free radio, but i can
>complain about how big of a POS they are.
>
>i have a kenwood tm-v7 that has those famous lines going thru the
>display. im sure the radio is out of warranty and im not going to pay
>kenwood to fix an obvious defect in their manufacturing process. so
>with that, my questions:
>
>a) can it be fixed fairly simple?
>b) if no to the above, can i order a new display?
>c) if no to the above, is there any way to fix it other than sending
>it back to the factory?
>d) if no to the above, anyone want the POS? lol just kidding, id like
>to keep it and get it mounted in my car.

<---Yes, the line problem is well known in the V7a display. The only 
cure is to replace the display assembly (you can't buy the individual 
LCD). Last time I checked, the part was around $150. It is very easy 
to replace yourself and you can order the assembly from Kenwood parts 
East or West.

Then again, you could always use it for remote base radio where the 
display issue is a non-sequitur!

Ken
--
President and CTO - Arcom Communications
Makers of the world famous RC210 Repeater Controller and accessories.
http://www.arcomcontrollers.com/
Authorized Dealers for Kenwood and Telewave and
we offer complete repeater packages!
AH6LE/R - IRLP Node 3000
http://www.irlp.net

[Repeater-Builder] Kenwood TM-V7 display problem

[James Miller]

Well, first off, i cant complain much about a free radio, but i can
complain about how big of a POS they are.

i have a kenwood tm-v7 that has those famous lines going thru the
display.  im sure the radio is out of warranty and im not going to pay
kenwood to fix an obvious defect in their manufacturing process. so
with that, my questions:

a) can it be fixed fairly simple?
b) if no to the above, can i order a new display?
c) if no to the above, is there any way to fix it other than sending
it back to the factory?
d) if no to the above, anyone want the POS? lol just kidding, id like
to keep it and get it mounted in my car.

Thanks folks.
kc9ikx
James

[Repeater-Builder] Re: Continuous FRS transmissions (was "GMRS and FRS")

[George Henry]

Continuous one-way transmissions on FRS frequencies are prohibited by 95.193 
(FRS Rule 3, "Types of Communications").  He's also in violation of 95.194 
(FRS rule 4, "FRS Units") if he has attached any type of external power 
supply or any kind of external antenna to an FRS walkie talkie, is using any 
type of radio other than an FCC-certified FRS radio, or made any 
modification to the radio to enable continuous transmission instead of 
push-to-talk.

George, KA3HSW / WQGJ413


- Original Message - 
From: "Ray Brown" <[EMAIL PROTECTED]>
To: 
Sent: Sunday, March 04, 2007 2:16 PM
Subject: Re: [Repeater-Builder] GMRS and FRS


> - Original Message - 
> From: "skipp025" <[EMAIL PROTECTED]>
>
>> One of my more serious GMRS friends just hates the FRS radios.
>> When the high side splinter frequency users use ctcss they often
>> get into some of the older wide gmrs repeater receivers.
>
>  I have one question, and I know it's off-topic, but I'm looking for
> some help. I have someone in my area, about a mile away, that is
> transmitting night and day, non-stop, on a FRS frequency (channel 1,
> 462.5325 MHz). I suspect that it's someone monitoring a parent's
> or grandparent's house. I know where the house is located. I don't
> think there's a GMRS repeater in town (at least, none that I can find
> by licensing or by radio ID) so I can't test for willful interference.
> Also, there's no tone or digital code going out, just a carrier with
> a bit of audio once in a while...
>
>  So the question is, is this guy doing anything illegal by broadcasting
> 24x7 inside a house, like an old baby monitor, on a FRS frequency?
>
>  Please direct replies to me at [EMAIL PROTECTED] so as not to
> clutter up this fine resource list. Thank you.
>
>_Ray_KBØSTN
>
>
>

[Repeater-Builder] UHS mastr II preamp

[Dan]

Anyone have a recommendation for a preamp for the Mastr II UHF 
repeater? I have used the stock UHS board in the past but have had 2 of 
these now fail due to the tuning slug becoming brittle with age and 
cracking/breaking. I now have 2 dead ones on my bench and a kinda deaf 
repeater. Any help? or should I just buy another UHS board and hope for 
the best.

Dan

RE: [Repeater-Builder] GR300 on Solar update

[Eric Lemmon]

Rod,

It's good news that you solved the problem with your solar-powered repeater.

I wonder if the company that is running a solar-power system without a
charge controller is just lucky that nothing has been damaged due to
overvoltage or battery overcharging.  Of course, how would they know?
Changing out two very large (1,500 Ampere-Hours each) batteries once a year
could be masking a serious problem.  With an appropriate charge controller
handling the flow of electrons, those batteries should last ten years!  That
company must be long on money but short on solar system design experience.
That's just my personal opinion, of course!  Looking at the positive side,
that company's policy resulted in the donation of a couple of year-old
batteries to help out a Ham, and that's a good thing.

73, Eric Lemmon WB6FLY
 

-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED]
Sent: Sunday, March 04, 2007 3:20 PM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] GR300 on Solar update

We found a diode that was installed backwards, on the positive line from the

wind generator/solar panels. We turned it around and we have not had a 
problem since that time; that was about 10 weeks ago.

We removed the wind gen and its wiring. Why? The company that donated 
the batteries has a repeater that is powered by two 35 watt panels, no 
charge controller, two 1500 amp batteries and the tx is at 100watts. They 
have no problem with this set-up for over 7 years. They swap out the 
batteries every year.

Now my repeater has one 110 watt and one 115 watt panel, with a charge 
controller, two 1500 amp batteries and 21 watts output. 

Works like a champ. Thank you all for your input.

Rod KC7VQR

Re: [Repeater-Builder] HP-8920a & HP-8920b option 102 available

[DCFluX]

Just purchased a service monitor from this seller my self, and I am
very satisfied with the results.

On 3/4/07, Jeff DePolo <[EMAIL PROTECTED]> wrote:
> Skipp sed:
>
> > Well...
> > Normally I wouldn't post this type of thing here... but it might
> > come in really handy for some of you.
>
> > The $825 cost might seem a bit high... but man it's worth the money.
> > The Seller is fluent on the Product and provides all the proper cal
> > data.
>
> The seller is a really sharp guy, and a nice guy to boot.  I bought one of
> my 8920B's from him, and recently sent a different one to him for a re-cal
> and CRT replacement.
>
> If you've shopped for service monitors or other used test equpment before,
> you can probably figure out who/what company this eBay'er is based on the
> eBay username and location.  I (and probably Skipp too) are not saying their
> name because some eBay'ers prefer to remain quasi-anonymous for whatever
> reason.  I have no affiliation with the person/company other than as a very
> satisfied customer.
>
> --- Jeff
>
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>

[Repeater-Builder] GR300 on Solar update

[rrath]

We found a diode that was installed backwards, on the positive line from the 
wind generator/solar panels. We turned it around and we have not had a 
problem since that time; that was about 10 weeks ago.

We removed the wind gen and its wiring. Why? The company that donated 
the batteries has a repeater that is powered by two 35 watt panels, no 
charge controller, two 1500 amp batteries and the tx is at 100watts. They 
have no problem with this set-up for over 7 years. They swap out the 
batteries every year.

Now my repeater has one 110 watt and one 115 watt panel, with a charge 
controller, two 1500 amp batteries and 21 watts output. 

Works like a champ. Thank you all for your input.

Rod KC7VQR

RE: [Repeater-Builder] Wanted: Mitrek channel elements (UHF)

[N9WYS]

OK - no sweat.  Just figured I'd offer it to you if you could use it...

Good luck with your project!

73 de Mark - N9WYS

-Original Message-
From: Repeater-Builder@yahoogroups.com On Behalf Of George Henry

Thanks.  Turns out one of the guys in the local ham club had a box of them 
in his garage, and I managed to find a couple that are pretty close.

George

- Original Message - 
From: "N9WYS" 

> George,
>
> I have a KXN1086 on what appears to be 47x.8625. (Can't tell the exact 
> freq
> - the label is pretty beat-up).
>
> If this is of any use to you, it's yours for the asking...
>
> Mark - N9WYS
>
> -Original Message-
> From: Repeater-Builder@yahoogroups.com On Behalf Of George Henry
> Sent: Tuesday, February 27, 2007 3:20 PM
> To: Repeater-Builder@yahoogroups.com
> Subject: [Repeater-Builder] Wanted: Mitrek channel elements (UHF)
>
> Does anyone have the following Mitrek elements:
>
> KXN1088  on or near 462.600
>
> KXN1086 on or near 467.600  (10.7 IF)
>
>
> Thanks.
>
>
> George, KA3HSW / WQGJ413
>





 
Yahoo! Groups Links





-- 
No virus found in this incoming message.
Checked by AVG Free Edition.
Version: 7.5.441 / Virus Database: 268.18.6/708 - Release Date: 3/2/2007
4:19 PM

RE: [Repeater-Builder] GMRS and FRS

[Eric Lemmon]

Ray,

If your mystery transmitter is actually on 462.5325 MHz, it is not on a FRS
channel.  FRS channel 1 is 462.5625 MHz.  It may be a low-power device
permitted under Part 15, and has sloppy frequency control.

73, Eric Lemmon WB6FLY
 

-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of Ray Brown
Sent: Sunday, March 04, 2007 12:16 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] GMRS and FRS


I have one question, and I know it's off-topic, but I'm looking for
some help. I have someone in my area, about a mile away, that is
transmitting night and day, non-stop, on a FRS frequency (channel 1,
462.5325 MHz). I suspect that it's someone monitoring a parent's
or grandparent's house. I know where the house is located. I don't
think there's a GMRS repeater in town (at least, none that I can find
by licensing or by radio ID) so I can't test for willful interference.
Also, there's no tone or digital code going out, just a carrier with
a bit of audio once in a while...

So the question is, is this guy doing anything illegal by broadcasting
24x7 inside a house, like an old baby monitor, on a FRS frequency?

Please direct replies to me at [EMAIL PROTECTED]
  so as not to
clutter up this fine resource list. Thank you.

_Ray_ KBØSTN

Re: [Repeater-Builder] GMRS and FRS

[Ray Brown]

- Original Message - 
From: "skipp025" <[EMAIL PROTECTED]>

> One of my more serious GMRS friends just hates the FRS radios.
> When the high side splinter frequency users use ctcss they often
> get into some of the older wide gmrs repeater receivers.

  I have one question, and I know it's off-topic, but I'm looking for
some help. I have someone in my area, about a mile away, that is
transmitting night and day, non-stop, on a FRS frequency (channel 1,
462.5325 MHz). I suspect that it's someone monitoring a parent's
or grandparent's house. I know where the house is located. I don't
think there's a GMRS repeater in town (at least, none that I can find
by licensing or by radio ID) so I can't test for willful interference.
Also, there's no tone or digital code going out, just a carrier with
a bit of audio once in a while...

  So the question is, is this guy doing anything illegal by broadcasting
24x7 inside a house, like an old baby monitor, on a FRS frequency?

  Please direct replies to me at [EMAIL PROTECTED] so as not to
clutter up this fine resource list. Thank you.

_Ray_KBØSTN

RE: [Repeater-Builder] HP-8920a & HP-8920b option 102 available

[Jeff DePolo]

Skipp sed:

> Well... 
> Normally I wouldn't post this type of thing here... but it might 
> come in really handy for some of you. 

> The $825 cost might seem a bit high... but man it's worth the money.
> The Seller is fluent on the Product and provides all the proper cal 
> data. 

The seller is a really sharp guy, and a nice guy to boot.  I bought one of
my 8920B's from him, and recently sent a different one to him for a re-cal
and CRT replacement.  

If you've shopped for service monitors or other used test equpment before,
you can probably figure out who/what company this eBay'er is based on the
eBay username and location.  I (and probably Skipp too) are not saying their
name because some eBay'ers prefer to remain quasi-anonymous for whatever
reason.  I have no affiliation with the person/company other than as a very
satisfied customer.

--- Jeff

[Repeater-Builder] HP-8920a & HP-8920b option 102 available

[skipp025]

HP-8920a & HP-8920b option 102 available

Well... 
Normally I wouldn't post this type of thing here... but it might 
come in really handy for some of you. 

It's hard to beat having a Communications Service Monitor with the 
Spectrum Analyzer & matching Tracking Generator.  After this many 
years I can't imagine life without one.  While I like most Service 
Monitor Brands I'm fond of the HP-8920 Series because the tracking 
generator bandwidths are adjustable vs the fixed values found in 
other equipment brands. 

There's a guy selling the HP Option 102 Spectrum Analyzer (with the 
tracking generator) Module on Ebay. If you have an HP-8920 a/b Service 
Monitor without the 002/102... well here's your chance to increase the 
usability of your 8920 Service Monitor better than 20-fold. 
 
HP 8920A 8920B opt 102 Spectrum Analyzer / Tracking Gen 
Ebay Item number: 120091843636 
 
The $825 cost might seem a bit high... but man it's worth the money.
The Seller is fluent on the Product and provides all the proper cal 
data. We also upgraded the 10 watt max input (yuck) of our newer 
8920b to the higher power 60 watt input (thank god).  The seller 
also provides the cal data for the higher power attenuator and an 
original front panel 60 watt retrofit sticker. The power increase 
upgrade is an additional cost. 

So what was a less used bench only semi-spare HP-8920b (10 watt max 
input) Plain-Jane Service Monitor is now fully optioned with the 
102 Spectrum Analyzer - Tracking Generator module and the max rf input 
value of 10 watts has been upgraded to a more realistic land mobile 
radio value of 60 watts. All the cal data is supplied and installed... 
the package works excellent!  

If you have an HP-8920 a or b Service Monitor without the 002/102 
option I would tell you to seriously consider jumping on the deal. 
(other than being a very happy customer... I have no connection with 
the ebay seller). But a great deal is well worth knowing about... 

cheers, 
skipp 
skipp025 at yahoo.com 
www.radiowrench.com 

Re: [Repeater-Builder] Kenwood TM-271A

[Roger White]

Over twenty years ago, our "repeater" receiver, a Spec Comm, finally gave up 
the ghost after a year or so. Not knowing any better, I took my trusty old 
IC-22A crystal controlled mobile rig, found the proper signals to interface the 
receiver portion with the Spec Comm transmitter, and placed it in service, 
figuring it would do for a month or so until we bought another "repeater" 
receiver. Well, you may have guessed the result, the '22A lasted many years and 
only after a lightening bolt laid it to rest did we repleace it. 

Roger W5RD
223.82, 224.18 and 927.1125 repeaters

- Original Message - 
  From: WA8DBW 
  To: Repeater-Builder@yahoogroups.com 
  Sent: Sunday, March 04, 2007 6:14 AM
  Subject: Re: [Repeater-Builder] Kenwood TM-271A



  Not a 271 but did use a TM-241 when the receiver failed on a local 2 meter 
repeater.  Simply placed one of the "garbage can" size filters on the input.  
Absolutely no intermod and better sensitivity than the normal MASTR II that had 
failed.

  At the same site I also use a TM-241 as a remote base controlled by an FC-1 
with no problems.  On the remote I have a notch filter tuned to the frequency 
of a 1/3 KW transmitter in the 152 MHz range.

  There are 28 transmitters at the site and within 300 yards there are another 
30 transmitters on another tower.

  Bottom-line is they can be made to work in high RF environments but a 
receiver with good front-end filtering will work without the need for 
additional filtering.

  Dick Reese
  WA8DBW
- Original Message - 
From: Cory Lee 
To: Repeater-Builder@yahoogroups.com 
Sent: Saturday, March 03, 2007 8:56 PM
Subject: [Repeater-Builder] Kenwood TM-271A
Has anyone used a Kenwood TM-271A to make a repeater, I cannot find the 
discriminator audio for this radio. Any help would be appreciated.

Cory Lee
KC5EWJ



.
 


   

Re: [Repeater-Builder] Kenwood TM-271A

[WA8DBW]

Not a 271 but did use a TM-241 when the receiver failed on a local 2 meter 
repeater.  Simply placed one of the "garbage can" size filters on the input.  
Absolutely no intermod and better sensitivity than the normal MASTR II that had 
failed.

At the same site I also use a TM-241 as a remote base controlled by an FC-1 
with no problems.  On the remote I have a notch filter tuned to the frequency 
of a 1/3 KW transmitter in the 152 MHz range.

There are 28 transmitters at the site and within 300 yards there are another 30 
transmitters on another tower.

Bottom-line is they can be made to work in high RF environments but a receiver 
with good front-end filtering will work without the need for additional 
filtering.

Dick Reese
WA8DBW
  - Original Message - 
  From: Cory Lee 
  To: Repeater-Builder@yahoogroups.com 
  Sent: Saturday, March 03, 2007 8:56 PM
  Subject: [Repeater-Builder] Kenwood TM-271A
  Has anyone used a Kenwood TM-271A to make a repeater, I cannot find the 
  discriminator audio for this radio. Any help would be appreciated.

  Cory Lee
  KC5EWJ


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[Repeater-Builder] Re: Kenwood TM-271A

[skipp025]

Re: Kenwood TM-271A

First off, most of the typical link radio type connections you're 
looking for are inside the radio. You need to pop off the cover and 
solder your own flying leads (wire connections) in place. 

As a Kenwood Dealer I can help you with a free pdf copy of the 
Factory Kenwood Service Manual. Just email me direct for a pdf scan 
and promise not to start selling copies. I can also provide some 
additional sources of information that would be pretty handy for 
your application. 

While the TM-271a is not rated for long tx duty cycles at full power 
(it's a typical well built Amateur Radio... not a commercial radio)
it operates just fine lock to talk at the lower power settings, which 
is easily programmed. 

A lot of people think a radio front end needs additional filtering 
when it fact it could be other issues.  

We have a mountain top located link radio (Yaesu) that will not 
work with pretty much any practical number of band pass cavities 
parked in front of it. The receiver just howls...  so I parked a 
3dB power pad in front of it and it now works just fine regardless 
of the number of cavities in the front end. The Yaesu Radio problem 
is not for lack of filtering...  it has other problems.  So it's 
hard to point fingers unless you're really sure of what's going on. 

I'm putting a TM-271 through its paces right now and have not had 
a problem with it yet while using it very busy repeater sites. And 
I don't run it lock to talk (repeater service) at full tilt power... 
because a good signal doesn't require full power from a  mountain 
top. 

cheers, 
skipp 

> > Has anyone used a Kenwood TM-271A to make a repeater, I cannot 
> > find the discriminator audio for this radio. Any help would be 
> > appreciated.

> Not the best choice , front end needs better filtering and because 
> of the rated duty cycle the output power needs turning down to about 
> 1/2 and a decent heat sink added , go find a commercial rig for 
> conversion and use the 271 if you must for a link or control or the 
> car .