[Repeater-Builder] Re: Motorola R1225 versus Kenwood TKR-750

[rtc_0001]

It's not so much a defect as it is asking the rptr to do more than it
was designed for. It may be a 45 watt PA but in rptr use, medium to HD
rptr use, drop it down to about 25 to 30 watts out of the PA.  Enjoy
what you get thru the duplexer. Asking for more will melt the PA.

The earlier units had a temp controlled fan that only came on when the
PA was about to melt.  The next generation of power supplies came with a
switch to turn the fan on permanently.

You will probably be able to fix them without the manual. Most of the
time the PA transistor collector got hot, melted the solder & the chip
caps moved (slid down the pcb due to gravity).

I repaired these on a regular basis without needing new parts unless the
damage literaly burnt the pcb around the collector lead.  I removed the
chip caps, removed the solder on the collector tab & trace & resoldered
it all back in with silver solder.  This, along with turning the factory
output down, made them last a long time even under HD casino use.

I think it took me maybe 45-60 mins to get it all apart, fix it,
reassemble, reinstall. Lots of times I did it in place at the customer's
premises.  rtc







> -Original Message-
> From: Repeater-Builder@yahoogroups.com

> Sent: Friday, July 13, 2007 11:08 AM
> To: Repeater-Builder@yahoogroups.com
> Subject: [Repeater-Builder] Re: Motorola R1225 versus Kenwood TKR-750
>
> Hi Eric,
>
> 
>
> I just pulled three 1225 uhf repeaters from two different locations
> and they all have the same failed tx pa problems. Wonder if there's
> a minor pa defect problem (like there was in early version one tkr
> repeaters) or it's just bad customer karma time. I've got to find
> a service manual before we open them up...
>
> cheers,
> skipp

[Repeater-Builder] Re: [GE Mastr II] URL Duplication with http prefix

[Nate Duehr]

On Jul 14, 2007, at 9:23 AM, Eric Lemmon wrote:

> Mike and Nate,
>
> Almost every URL that is posted with "http" in front get duplicated,
> regardless of the "<" and ">" characters.

Duplicated?  Never seen that here, ever.  That's a mail client  
problem, not the sender's problem, if the sender only typed it once.

> To prevent that, simply delete the "http-colon-slash-slash" and  
> begin the
> URL with "www" and enclose the entire URL in "<" and ">"  
> characters.  The
> "http-colon-slash-slash" is unnecessary and causes some email  
> clients to
> return a duplicate.

It's NOT a URL without http:// -- see the URL specifications.  Just  
because browsers allow it by defaulting to looking for http services  
by default, doesn't make it a URL.

> A Tiny URL is an easy way to avoid broken links due to word wrap.

Tiny URL is a hack to fix problems with mail clients.  I almost  
mentioned it in my last post -- figuring that someone would mention it.

As mentioned before, folks can fix it with a few keystrokes in broken  
mail clients.

Leaving it normal encourages (indirectly) movement away from broken  
badly-written mail clients that attempt to support clicking on URL's  
and do it improperly.

I provide the URL to things, sometimes remembering the <> trick, and  
if folks can't deal with their broken mail clients, it's really "not  
my problem"... same thing with the guy with a radio that's over- 
deviating out of the pass-band of the repeater... repeater's working  
great by limiting the over-deviated signal.  Must be a user  
problem.  :-)

We had a great debate that went on for weeks about this on one of my  
hardware engineering mailing lists... complete with lists of which  
mail clients were sane and which ones sucked.  In the end, it didn't  
matter -- folks don't change mail clients once they get emotionally  
attached to one, it doesn't matter if it follows the RFC's properly  
or not.  People will be people.

That (mythical, but we've all heard 'em) guy with the over-deviated  
radio "likes how it sounds" on simplex, too... oh well.

Sorry to go off-topic here, but there's an interesting side- 
conversation here that touches the very heart of engineering... fix  
the root-cause problem (mail clients that don't stick to the  
standards) or patch around it?  I like the former, some like the  
latter...

--
Nate Duehr, WY0X
[EMAIL PROTECTED]

Re: [Repeater-Builder] Re: 224 MHz PA fun and war stories

[Nate Duehr]

On Jul 14, 2007, at 7:57 AM, WD7F - John in Tucson wrote:


> Turned into a real challenge.  Using an RF splitter to divide the  
> input and
> a phased power combiner/bridge to sum the outputs, we manged to get  
> a very
> stable and bullet proof PA that once transmitted all night due to a
> controller malfunction.   The heavy duty heat sink and a fan  
> allowed the
> brick on the key operation with no problems.

If a PA can't handle 48 hours of continuous key-down as-installed  
(fans if one must, etc.), it shouldn't be used on a repeater.

> You can find it on K7IOU's micor conversion page at
> http://home.comcast.net/~micorrepeater/220mhzpa.htm

Thanks for sharing, John.  It's on the "must read" pile!  (GRIN)

--
Nate Duehr, WY0X
[EMAIL PROTECTED]

Re: [Repeater-Builder] Zetron

[Maire-Radios]

any know the access code for the Zetron 39MAX

thanks  and it is not 12123

John


  - Original Message - 
  From: [EMAIL PROTECTED] 
  To: Repeater-Builder@yahoogroups.com 
  Sent: Saturday, July 14, 2007 4:42 PM
  Subject: Re: [Repeater-Builder] Zetron


  John, there is a manual on line at the Repeater-Builder site, but your 
  unit may be an earlier version of the EPROM than the one documented in 
  that manual.

  The default decode sequence is 12345# if it is in the factory original 
  state. I had several that were not, and found that I could remove the 
  RAM chip from the Dallas Semiconductor battery back up for a few 
  minutes and have the processor come back up in the defauld condition 
  when it was replaced and could program from there.

  You have to put the processor back into the RS-232 access mode after 
  this step, and you have to have a special cable (not standard RS-232) 
  in order to program it via computer. The cable is documented in the 
  manual and you will find that older units will operate a sub-set of the 
  commands shown in the manual.

  73 - Jim W5ZIT

  -Original Message-
  From: Maire-Radios <[EMAIL PROTECTED]>
  To: Repeater-Builder@yahoogroups.com
  Sent: Sat, 14 Jul 2007 11:59 am
  Subject: [Repeater-Builder] Zetron

  can any tell me the default program codes for the:

   

  Zetron model 38

  and

  Zetron model 38A

   

  thank you,  John

  __
  Check Out the new free AIM(R) Mail -- Unlimited storage and 
  industry-leading spam and email virus protection.
  =0


   

Re: [Repeater-Builder] Zetron

[w5zit]

John, there is a manual on line at the Repeater-Builder site, but your 
unit may be an earlier version of the EPROM than the one documented in 
that manual.

The default decode sequence is 12345# if it is in the factory original 
state.  I had several that were not, and found that I could remove the 
RAM chip from the Dallas Semiconductor battery back up for a few 
minutes and have the processor come back up in the defauld condition 
when it was replaced and could program from there.

You have to put the processor back into the RS-232 access mode after 
this step, and you have to have a special cable (not standard RS-232) 
in order to program it via computer.  The cable is documented in the 
manual and you will find that older units will operate a sub-set of the 
commands shown in the manual.

73 - Jim  W5ZIT


-Original Message-
From: Maire-Radios <[EMAIL PROTECTED]>
To: Repeater-Builder@yahoogroups.com
Sent: Sat, 14 Jul 2007 11:59 am
Subject: [Repeater-Builder] Zetron








can any tell me the default program codes for the:

 

Zetron model 38

and

Zetron model 38A

 

thank you,  John


Check Out the new free AIM(R) Mail -- Unlimited storage and 
industry-leading spam and email virus protection.
=0

Re: [Repeater-Builder] Zetron

[Maire-Radios]

it looks like the same program code works for both.
thanks  John


  - Original Message - 
  From: Maire-Radios 
  To: Repeater-Builder@yahoogroups.com 
  Sent: Saturday, July 14, 2007 3:20 PM
  Subject: Re: [Repeater-Builder] Zetron



  I thought the 38 and 38A were different codes?

  John


- Original Message - 
From: Charles Mumphrey Kc5ozh 
To: Repeater-Builder@yahoogroups.com ; [EMAIL PROTECTED] 
Sent: Saturday, July 14, 2007 3:10 PM
Subject: RE: [Repeater-Builder] Zetron


Hey John and the Group!
You may want to do a little more reading of this groups "bible".
IMHOTry this link:
http://www.repeater-builder.com/zetron/zetron-model-38A025-9043Y.pdf
Might be a little easier than someone telling you the many codes...
Enjoy!
Charlie

"It is not the class of license the Amateur holds, but the class of the
Amateur that holds the license."

Charles Mumphrey
Amateur Radio Station Kc5ozh
Kc5ozh Rowlett Repeater: 441.325 MHz + 162.2
Kc5ozh Dallas Repeater: 441.950 MHz + 162.2
Kc5ozh Rowlett Repeater II: 441.950 MHz + 110.9
Rowlett R.A.C.E.S. Unit 823
http://www.CharliesElectronics.com
http://www.hello-radio.org
http://www.emergency-radio.org

>  Original Message 
> Subject: [Repeater-Builder] Zetron
> From: "Maire-Radios" <[EMAIL PROTECTED]>
> Date: Sat, July 14, 2007 1:59 pm
> To: 
> 
> can any tell me the default program codes for the:
> 
> Zetron model 38
> and
> Zetron model 38A
> 
> thank you, John




   

Re: [Repeater-Builder] Zetron

[Maire-Radios]

I thought the 38 and 38A were different codes?

John


  - Original Message - 
  From: Charles Mumphrey Kc5ozh 
  To: Repeater-Builder@yahoogroups.com ; [EMAIL PROTECTED] 
  Sent: Saturday, July 14, 2007 3:10 PM
  Subject: RE: [Repeater-Builder] Zetron


  Hey John and the Group!
  You may want to do a little more reading of this groups "bible".
  IMHOTry this link:
  http://www.repeater-builder.com/zetron/zetron-model-38A025-9043Y.pdf
  Might be a little easier than someone telling you the many codes...
  Enjoy!
  Charlie

  "It is not the class of license the Amateur holds, but the class of the
  Amateur that holds the license."

  Charles Mumphrey
  Amateur Radio Station Kc5ozh
  Kc5ozh Rowlett Repeater: 441.325 MHz + 162.2
  Kc5ozh Dallas Repeater: 441.950 MHz + 162.2
  Kc5ozh Rowlett Repeater II: 441.950 MHz + 110.9
  Rowlett R.A.C.E.S. Unit 823
  http://www.CharliesElectronics.com
  http://www.hello-radio.org
  http://www.emergency-radio.org

  >  Original Message 
  > Subject: [Repeater-Builder] Zetron
  > From: "Maire-Radios" <[EMAIL PROTECTED]>
  > Date: Sat, July 14, 2007 1:59 pm
  > To: 
  > 
  > can any tell me the default program codes for the:
  > 
  > Zetron model 38
  > and
  > Zetron model 38A
  > 
  > thank you, John



   

RE: [Repeater-Builder] Zetron

[Charles Mumphrey Kc5ozh]

Hey John and the Group!
You may want to do a little more reading of this groups "bible".
IMHOTry this link:
http://www.repeater-builder.com/zetron/zetron-model-38A025-9043Y.pdf
Might be a little easier than someone telling you the many codes...
Enjoy!
Charlie

"It is not the class of license the Amateur holds, but the class of the
Amateur that holds the license."

Charles Mumphrey
Amateur Radio Station Kc5ozh
Kc5ozh Rowlett Repeater: 441.325 MHz + 162.2
Kc5ozh Dallas Repeater: 441.950 MHz + 162.2
Kc5ozh Rowlett Repeater II: 441.950 MHz + 110.9
Rowlett R.A.C.E.S. Unit 823
http://www.CharliesElectronics.com
http://www.hello-radio.org
http://www.emergency-radio.org


>  Original Message 
> Subject: [Repeater-Builder] Zetron
> From: "Maire-Radios" <[EMAIL PROTECTED]>
> Date: Sat, July 14, 2007 1:59 pm
> To: 
> 
> can any tell me the default program codes for the:
> 
> Zetron model 38
> and
> Zetron model 38A
> 
> thank you,  John

[Repeater-Builder] Zetron

[Maire-Radios]

can any tell me the default program codes for the:

Zetron model 38
and
Zetron model 38A

thank you,  John

Re: [Repeater-Builder] Motorola Quantar and Quantro Repeater Questions.

[Albert]

Hi Eric,

Thanks for the info and sorry for not giving you the necessary 
information you request.  Upon further digging into the issue,
I've discovered that the Quantro low power module is not compatible with 
the Quantar back plane edge card connector.
Edge card pin outs are quite a bit different than the pin outs from the 
Qunatar PA edge cards.  So, that's the problem!  Now
I need a UHF range 2 100 watt PA assy. to get this up and working.  
Anybody have one for sale???  After I get one of
those, then I can continue with trying to get it going.

Cheers
AJ



Eric Lemmon wrote:

>It is difficult to give you advice with such vague descriptions.  Please
>provide the model and/or FRU numbers for each component in your station,
>including the chassis and power supply.  It is possible that there is an
>incompatibility issue at work here.  Since the Quantro/Quantar uses a
>digital SPI buss to link each component, the station control module (SCM)
>assumes that certain modules are connected before the power-up diagnostic
>routine will pass.  In particular, certain power supplies will only work
>with certain PAs.  I suspect that may be a factor in your case.
>
>73, Eric Lemmon WB6FLY
> 
>
>-Original Message-
>From: Repeater-Builder@yahoogroups.com
>[mailto:[EMAIL PROTECTED] On Behalf Of ajbradio
>Sent: Thursday, July 12, 2007 12:54 PM
>To: Repeater-Builder@yahoogroups.com
>Subject: [Repeater-Builder] Motorola Quantar and Quantro Repeater Questions.
>
>Hi everyone. Don't post often but I ran into a slight problem and
>can't seem to find an answer and thought that I'd ask in the group of
>some of the Quantar technicians for some guidance. 
>
>I have what I would call a partial Quantro which is pretty much
>complete minus the power supply and final amplifier section. I also
>have a Quantar chassis, the gold colored one, with a power supply. 
>What I've done is taken all the components out of the Quantro chassis
>and placed them into the Quantar chassis. I changed out the firmware
>to a Quantar simm I had as well in the SCM. Now, when I power it up,
>I immediately get a power supply failure LED coming on. If I remove
>the Quantro PA unit, which looks to be more like a small low power
>driver and not your typical 100 watt PA assy., everything fires up and
>starts proving out but of course fails because now there is no PA. 
>So, my question is should this PA assy., which I think is maybe 5 to
>25 watts max as it has no real cooling fins, work in the Quantar
>chassis? Is the PA for the Quantro I have majorily different than a
>Quantar? Is it possible there is an incompatibility between a Quantar
>modules backplane board and that of a Quantro? Or, do I maybe just
>have a dead and shorted out low power PA module? The exciter shold be
>okay as I don't get a fault on it. This is a UHF low split and I'd
>like to see if I can get it working somehow. ANy help would be
>greatly appreciated.
>
>Thanks
>AJ
>
>
>
>
>
>
> 
>Yahoo! Groups Links
>
>
>
>
>
>  
>

[Repeater-Builder] URL Duplication with http prefix

[Eric Lemmon]

Mike and Nate,

Almost every URL that is posted with "http" in front get duplicated,
regardless of the "<" and ">" characters.

To prevent that, simply delete the "http-colon-slash-slash" and begin the
URL with "www" and enclose the entire URL in "<" and ">" characters.  The
"http-colon-slash-slash" is unnecessary and causes some email clients to
return a duplicate.

A Tiny URL is an easy way to avoid broken links due to word wrap.

73, Eric Lemmon WB6FLY

 

-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Mike Morris WA6ILQ
Sent: Friday, July 13, 2007 11:02 PM
To: [EMAIL PROTECTED]
Subject: Re: [GE Mastr II] Mastr II Prog. CG Board



The word wrap broke the link above. Try
 >

Hint to all: Bracket any emailed links with "<" and ">" characters
and properly written email clients will handle them properly.

It's all part of RFC1738, which defines the syntax of a URL.

Mike WA6ILQ

Re: [Repeater-Builder] Mocom 10 info?

[George Henry]

Yeah, that's why I asked him for the model number or chassis number...  It 
didn't sell, even at 99 cents, so I may just e-mail him and see if he still 
wants to unload it for basically the cost of shipping.


George

- Original Message - 
From: "JOHN MACKEY" <[EMAIL PROTECTED]>
To: 
Sent: Saturday, July 14, 2007 12:04 AM
Subject: Re: [Repeater-Builder] Mocom 10 info?


> Thanks for posting that, George!!
>
> The ebay listing does not say what frequency range/band it is.
> I've never seen that radio, but the case looks like what they used for the
> Mocom 35.
>
> -- Original Message --
> Received: Fri, 13 Jul 2007 10:23:43 PM CDT
> From: "George Henry" <[EMAIL PROTECTED]>
> To: 
> Subject: Re: [Repeater-Builder] Mocom 10 info?
>
>> It's already ended, but it was item number 290136403140...  you should be
>> able to pull it up that way.
>>
>> George
>>

Re: [Repeater-Builder] Re: 224 MHz PA fun and war stories

[WD7F - John in Tucson]

We built a PA for the high band VHF Micor using two Mitsubishi modules.  We
had some problems getting sufficient drive out of our exciter conversion and
we wanted higher power, so we used two modules requiring 50 mW input for 35W
out.

Turned into a real challenge.  Using an RF splitter to divide the input and
a phased power combiner/bridge to sum the outputs, we manged to get a very
stable and bullet proof PA that once transmitted all night due to a
controller malfunction.   The heavy duty heat sink and a fan allowed the
brick on the key operation with no problems.

You can find it on K7IOU's micor conversion page at
http://home.comcast.net/~micorrepeater/220mhzpa.htm

de WD7F
John in Tucson





 
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[Repeater-Builder] Re: 440.6 receive

[Mike Morris WA6ILQ]

For sale or for trade.

Due to a frequency change I have a KXN1024 channel
element available.  It was used in a 25 watt mobile
Micor that was built up as a portable / backup repeater.

The crystal in this element is cut for low side injection and
when installed a mobile radio this element results in a
receiver on 440.600 Mhz and a transmitter on 445.600MHz.
See 
for more info.

Switching from low side to high side requires some work, and
is documented in the article referenced above.

This element was "done the right way" - the element was
originally on a 452Mhz channel, it was rebuilt and
temp-comp'd by International Crystal.

Mike WA6ILQ

Re: [Repeater-Builder] Re: 224 MHz PA fun and war stories

[Mike Morris]

The Condor conversions for the GEs are on the GE page at repeater-builder.

Their web site is at 

Mike WA6ILQ


At 12:07 AM 07/14/07, you wrote:
>Same thing with the Micor 223/224 MHz conversions. We simply
>used bricks with trailing low pass filters.  I'm checking to
>see what type of docs I have around for the pa sections.
>
>There's a really well done/built linked 223/224 linked system on the
>west coast called the Condor System. You might search the web
>for the conversion information related to that equipment. I based
>one of my last brick projects on that same circuit...  the hard part
>is trying to find all the proper parts (caps rated for vhf with
>a decent D-factor) at decent prices.
>
>A few years back there were a modest amount of small size Milcom
>220 Mhz hybrid pa's on ebay. Another source of 35 watts on 224 MHz
>if you can find them still.
>
>s.
>
> > Nate Duehr <[EMAIL PROTECTED]> wrote:
> > Everything I've read about converting MASTR II PA's from VHF
> > to 220 doesn't look too good.
> >
> > I have heard rumor that moving a MASTR III PA might be easier.
> > No desire to hunt for one and try it, though.
> >
> > Most of the MASTR II 220 conversions I've seen on-air took a
> > "brick module" 220 PA from RF Parts and fed that from the
> > converted M2 exciter, for around 25-35W out.
> >
> > Nate Duehr
> > [EMAIL PROTECTED]
> >
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>

[Repeater-Builder] Re: 224 MHz PA fun and war stories

[skipp025]

Same thing with the Micor 223/224 MHz conversions. We simply 
used bricks with trailing low pass filters.  I'm checking to 
see what type of docs I have around for the pa sections.  

There's a really well done/built linked 223/224 linked system on the 
west coast called the Condor System. You might search the web 
for the conversion information related to that equipment. I based 
one of my last brick projects on that same circuit...  the hard part 
is trying to find all the proper parts (caps rated for vhf with 
a decent D-factor) at decent prices. 

A few years back there were a modest amount of small size Milcom 
220 Mhz hybrid pa's on ebay. Another source of 35 watts on 224 MHz 
if you can find them still. 

s. 

> Nate Duehr <[EMAIL PROTECTED]> wrote:
> Everything I've read about converting MASTR II PA's from VHF 
> to 220 doesn't look too good.
> 
> I have heard rumor that moving a MASTR III PA might be easier.  
> No desire to hunt for one and try it, though.
> 
> Most of the MASTR II 220 conversions I've seen on-air took a 
> "brick module" 220 PA from RF Parts and fed that from the 
> converted M2 exciter, for around 25-35W out.
> 
> Nate Duehr
> [EMAIL PROTECTED]
>