[Repeater-Builder] Re: Spectra TAC question

[twoway_tech]

Thanks Kevin and mark for your help so far. I have ALOT of research to
do and ALOT more questions to ask before I decide exactly what I am
going to do for a voter system. I appreciate your time and support. 


-Jordan

RE: [Repeater-Builder] has anyone got

[Royce Nickerson]

Steve,
I have an NHRC-2 For Sale

Royce
  -Original Message-
  From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] Behalf Of Steve
  Sent: Wednesday, January 10, 2007 7:21 AM
  To: Repeater-Builder@yahoogroups.com
  Subject: [Repeater-Builder] has anyone got



  Hi
  has anyone got an NHRC 3 or 4,or something comparable
  for sale and is willing to post to the UK. I need a cheap
  controller for a project.

  73

  Steve

  

Re: [Repeater-Builder] Spectra TAC question

[w8ak]

Hi Kevin,
I found my prints. I have modified schematics and board layouts of the SQM.  
I will scan them in the morning at work and try to send them to you.
 
Glenn  W8AK

[Repeater-Builder] New articles on repeater-builder

[Bob M.]

There are some new articles in the Motorola section of
www.repeater-builder.com in the following areas:

MaxTrac, MSF5000, Spectra

Also some new stuff in the Construction Projects area.

New topics are always welcome.

Bob M.



 

Any questions? Get answers on any topic at www.Answers.yahoo.com.  Try it now.

Re: [Repeater-Builder] Spectra TAC question

[Kevin Custer]

Steve Kometz wrote:
>> Yes please assemble the Spectra Tac info.
>> I actually have a comparator and receiver shelf on my bench working 
>> on a way to use the two (and more recievers) without the status tone.
>> I have heard of people inserting the status tone at the link receiver 
>> end, and several other ideas.
>> So, I would like to hear some other ideas.
>
> I'm working on it
> Watch here for the announcement of the URL...
> Kevin 

As promised


Thanks to those who have provided so far...

Kevin

Re: [Repeater-Builder] Spectra TAC question

[Kevin Custer]

Steve Kometz wrote:
> Yes please assemble the Spectra Tac info.
> I actually have a comparator and receiver shelf on my bench working on 
> a way to use the two (and more recievers) without the status tone.
> I have heard of people inserting the status tone at the link receiver 
> end, and several other ideas.
> So, I would like to hear some other ideas.

I'm working on it

Watch here for the announcement of the URL...

Kevin

Re: [Repeater-Builder] Spectra TAC question

[Steve Kometz]

Yes please assemble the Spectra Tac info. 
  I actually have a comparator and receiver shelf on my bench working on a way 
to use the two (and more recievers) without the status tone. 
  I have heard of people inserting the status tone at the link receiver end, 
and several other ideas. 
  So, I would like to hear some other ideas. 

Re: [Repeater-Builder] Re: temperature control circuit

[Kevin Custer]

This thread is now a web article:


Kevin Custer

Bob Dengler wrote:

At 1/11/2007 06:48 AM, you wrote:
Mime-Version: 1.0
Content-Transfer-Encoding: 7bit
Content-Type: text/plain; charset=US-ASCII

  

The 1/4 watt heater resistor & LM34 temperature sensor are mounted on the
same side of the crystal but separated as far apart as possible.



I forgot to mention that thermally conductive epoxy was used to mount the 
LM34 & 51 ohm 1/4 watt heater resistor onto the crystal.


Bob NO6B

[Repeater-Builder] MAXTRAC BACK TO BACK

[patriciovallejor]

Dear friends I would like to know  how to make a back to back link 
with tone descrimination using two maxtrac radios, some one say me 
that I have to use a bidirectional control tone pannel 

I hope someone help me 

regards

Patricio Vallejo

Re: [Repeater-Builder] Spectra TAC question

[Kevin Custer]

[EMAIL PROTECTED] wrote:

Hi Guys,
We run Motorola SpectraTac on all of our systems. I also use some with 
normal staus tone operation and some set up for fixed gain with cor 
from the link receivers. These run fine mixed mode in the same 
comparator. I have  the details on the mods that I came up with for 
the SQM's if it would help anyone.
 
Glenn W8AK


Yes please...
I'll assemble the whole thing into a web article giving credit to those 
who help contribute.


Send to [EMAIL PROTECTED]   orw3kkc   at   repeater (dash) 
builder  dot   khom

Pictures, Text, PDF's, First Born

Kevin

Re: [Repeater-Builder] Spectra TAC question

[w8ak]

Hi Guys,
We run Motorola SpectraTac on all of our systems. I also use some with  
normal staus tone operation and some set up for fixed gain with cor from the  
link 
receivers. These run fine mixed mode in the same comparator. I have   the 
details on the mods that I came up with for the SQM's if it would help  anyone.
 
Glenn W8AK

RE: [Repeater-Builder] Spectra TAC question

[N9WYS]

Hi, Kevin

I'm pretty sure that's how I followed the conversation, too.  However,
Jordan was the one who was actually looking for the information on how to do
it.

My system is up and running happily with the status tone - and since the
county radio system is allowing me to piggyback my audio on their microwave
backbone, there was no need for me to convert.  

But it looks like Jordan might be investigating the use of remote radio
links and may need that info for his project.

Mark - N9WYS

-Original Message-
From: Repeater-Builder@yahoogroups.com On Behalf Of Kevin Custer

Jordan, Mark, et al,

I have a some of information on the subject of using the Motorola 
Spectra-TAC voter in a non-Motorola environment.  Unfortunately, this 
information exists in many emails and is not a complete representation 
of all of the concepts that were discussed in a past thread.  That being 
said, I will offer to either forward the emails I have or make a web 
page (as hap-hazard as it may be) to convey the information I gathered 
on the subject.

Since I never completed the voter project I set out to do, it is only 
information and guidelines and won't be the detailed conversion article 
I would rather it be.

Let me know and I'll put something together...

Kevin Custer 

Re: [Repeater-Builder] Spectra TAC question

[Kevin Custer]

Jordan, Mark, et al,

I have a some of information on the subject of using the Motorola 
Spectra-TAC voter in a non-Motorola environment.  Unfortunately, this 
information exists in many emails and is not a complete representation 
of all of the concepts that were discussed in a past thread.  That being 
said, I will offer to either forward the emails I have or make a web 
page (as hap-hazard as it may be) to convey the information I gathered 
on the subject.

Since I never completed the voter project I set out to do, it is only 
information and guidelines and won't be the detailed conversion article 
I would rather it be.

Let me know and I'll put something together...

Kevin Custer


N9WYS wrote:
> Jordan,
>
> You are correct when you say that, in *standard* configuration, they do
> require a 100% status tone on the line.  HOWEVER, there was a discussion a
> while back about using the SpectraTAC system and modifying it so you didn't
> need the status tone to vote... but I can't find where that was right now.
> If my memory serves me (and at times, it doesn't ) the mod wasn't all
> that involved.
>
> I use a SpectraTAC system on my 444.550 machine, but I also have a definite
> advantage in that the county where the repeater is located is allowing me to
> use up to three voice channels on their microwave backbone (MUX?) to bring
> remote RX audio back to the comparator at main repeater.  So I'm using the
> status tone.  ;-)
>
> I only experienced two issues with my system - power supply failures in the
> receivers (I've had to rebuild two of them so far), and SQM cards.  This is
> probably due to the fact that this came out of an old VHF Low band system
> that was in use since the early 70's.  (And yes, I did convert the receivers
> over to UHF with different RX boards.  "Plug and play" for the most part...)
>
> The replacement electrolytic caps (23D83093G13) I received from Motorola
> were substantially larger (physically) than the ones that came out of the
> old power supply, so I had to modify the receiver cabinet (cut a notch) so
> the supply would go back into the cabinet after the repair.  But there isn't
> even a HINT of AC in with the DC voltage now.  (Saw 0.9VAC on the 13.8VDC
> before the repair... caused the status tone to vary all over the place.)
> hehehehe
>   
> I've also rebuilt five of my SQMs - I had a total of six altogether - so I
> now have what I hope will be good spares...  Had to replace the 3
> electrolytic caps on the boards - the electrolyte was actually coming out of
> the ends of the caps.  Check them - the "aging" effects will be visible.
> (Or at least they were to me...)  
>
> One caution - I was told by a Motorola tech NOT to "mess around with" (i.e.,
> replace) the one 2% tolerance cap the board.  Apparently changing it can
> wreak havoc in trying to get the card working properly again if you don't
> get the exact same value.
>
> Interfacing it to my Kenwood TKR-820 repeater was a bit of a challenge, but
> has been successfully done - thanks to the assistance of those here on the
> list.
>
> Good luck - and I'm sure someone here will be able to remember the
> discussion about the modification better than I.  
>
> Sorry...
> 73 de Mark - N9WYS
>
>
> -Original Message-
> From: Repeater-Builder@yahoogroups.com On Behalf Of twoway_tech
>
> Has anyone had much luck with a specra tac voter?  I found one at a
> good price, but I was wanting to know if it would be worth messing
> with for my amateur repeater.  I was told that they require a 100%
> transmit on the links, but someone else also told me that they could
> be used normally as well. (when a remote receives a signal, the link
> keys up)
>
> Any info at all would be appreciated.
>
> Thanks,
>
> Jordan

Re: [Repeater-Builder] Re: temperature control circuit

[Bob Dengler]

At 1/11/2007 06:48 AM, you wrote:

>The 1/4 watt heater resistor & LM34 temperature sensor are mounted on the
>same side of the crystal but separated as far apart as possible.

I forgot to mention that thermally conductive epoxy was used to mount the 
LM34 & 51 ohm 1/4 watt heater resistor onto the crystal.

Bob NO6B

Re: [Repeater-Builder] Re: temperature control circuit

[Bob Dengler]

At 1/11/2007 08:38 AM, you wrote:
>Thanks for sharing your circuit, Bob...
>
>Have you done any measurements to see how constant the temperature is
>maintained over time? Looks like a neat little circuit for a couple of
>other applications.
>
>73, Tony W4ZT

Measuring the LM34's output, it was very good: less than 0.2 °F change.

Keep in mind that other applications will probably require a different 
feedback loop.  The 400 µF cap & 30 k resistor I removed across the 100 k 
resistor were probably for controlling much larger systems with longer time 
lags between the heater & sensor.

Bob NO6B

Re: [Repeater-Builder] Radio Tone Control

[Gareth Bennett]

Kent, 
It would be beneficial to know exactly what you wish to achieve, and to 
know more about your project/requirements so that I can be of more assistance.
The VX-4200 is a very versatile radio and can preform numerous remote 
control functions.

Cheers
_

Gareth Bennett

This e-mail is confidential, if you received this message in error, or you
are not the intended recipient,
please return it to the sender and destroy any copies.
Thank you.

  - Original Message - 
  From: Kent Chong 
  To: Repeater-Builder@yahoogroups.com 
  Sent: Wednesday, January 10, 2007 11:45 PM
  Subject: Re: [Repeater-Builder] Radio Tone Control



  Dear Gareth,

  We are using VX-4200 series and ICOM IC-F521 or F621 radio. Would like to 
know more how you do it. We know the VX-4200 has a DB15. How do we control the 
radio via the audio line?

  Best Regards,

  Chong Kwan Meng


  - Original Message 
  From: Gareth Bennett <[EMAIL PROTECTED]>
  To: Repeater-Builder@yahoogroups.com
  Sent: Tuesday, 9 January 2007 6:14:39 PM
  Subject: Re: [Repeater-Builder] Radio Tone Control



  Vertex Standard VX-2200 and 4200 series radios can be channel changed via BCD 
addressible  pins from the rear sub DB15.
  We utilise a UHF link radio (VX-2200 or 4200) to send 5 Tone commands 
that can be addressed via a configurable BCD output that can change the 
frequency and of course pass through the appropriate audio.

  Let me know if this is the down the track that you are interested in, and I 
can supply you more info.
   _ _ _ _ _ 

  Gareth Bennett

  This e-mail is confidential, if you received this message in error, or you
  are not the intended recipient,
  please return it to the sender and destroy any copies.
  Thank you.

- Original Message - 
From: Vincent Caruso 
To: Repeater-Builder@ yahoogroups. com 
Sent: Tuesday, January 09, 2007 6:47 PM
Subject: Re: [Repeater-Builder] Radio Tone Control


Some info can be found on the Midian site in pdf at the following link

http://www.midians. com/pdf/tone_ signaling. pdf

Telex has some info on their site as well, but most common commercial 
gear only interfaces to certain radios for multiple channel control 
otherwise you are limited to one two or four channel remotes.

Vince

Kent Chong wrote:
> Hello,
>  
> Would like to control ICOM, and Vertex radio remotelly by using the 
> tone, for example, change channel, PTT etc. Anybody know the remote 
> control tone standard? Where could I find the informtion?
>  
> Best Regards,
>  
> Chong Kwan Meng 
> 
> Send instant messages to your online friends 
> http://asia. messenger. yahoo.com 

 




  Send instant messages to your online friends http://asia.messenger.yahoo.com 

   

[Repeater-Builder] Re: Battery backup

[Doug Dickinson]

Try this link:
   
  http://www.westmountainradio.com/SuperPWRgate.htm
   
  Doug

[Repeater-Builder] SpectraTAC group

[Mark Tomany]

Is this group defunct?  I posted a message a couple of weeks ago, and it
hasn't posted yet.

I reported that I had to repair a couple of my SpectraTAC receiver power
supplies, and that the new replacement electrolytic caps I received from
Motorola were substantially larger than the ones that came out.  

These caps are the ones that mount to the chassis itself and not the circuit
board.  The end result was that it required me to cut a notch in the top of
the receiver shelf to allow the power supply to fit back in when
reinstalled.  (The cap is about 1/8" too tall...)

Mark - N9WYS

Re: [Repeater-Builder] Re: temperature control circuit

[Tony King - W4ZT]

Thanks for sharing your circuit, Bob...

Have you done any measurements to see how constant the temperature is 
maintained over time? Looks like a neat little circuit for a couple of 
other applications.

73, Tony W4ZT

[EMAIL PROTECTED] wrote:
> At 1/8/2007 15:22, you wrote:
>> Hi Bob,
>>I would like to get a copy of that circuit if you have one available.
>>
>> Thanks,
> 
> OK, here is the circuit I used.  The original National Semiconductor 
> circuit had a 30 K resistor in series with a 400 uF cap., both in parallel 
> with the 100 K resistor on the input of the 1st LM324 section.  I found 
> that combo to actually destabilize the operation of the controller for this 
> particular application, so I removed them & changed the 2 uF cap in series 
> with the 10 megohm resistor to 5 uF.  That cap is a non-polarized paper 
> capacitor; I believe a 4.7 uF non-polarized ceramic should work as well.
> 
> The 1/4 watt heater resistor & LM34 temperature sensor are mounted on the 
> same side of the crystal but separated as far apart as possible.
> 
> Bob NO6B

RE: [Repeater-Builder] Spectra TAC question

[N9WYS]

Jordan,

You are correct when you say that, in *standard* configuration, they do
require a 100% status tone on the line.  HOWEVER, there was a discussion a
while back about using the SpectraTAC system and modifying it so you didn't
need the status tone to vote... but I can't find where that was right now.
If my memory serves me (and at times, it doesn't ) the mod wasn't all
that involved.

I use a SpectraTAC system on my 444.550 machine, but I also have a definite
advantage in that the county where the repeater is located is allowing me to
use up to three voice channels on their microwave backbone (MUX?) to bring
remote RX audio back to the comparator at main repeater.  So I'm using the
status tone.  ;-)

I only experienced two issues with my system - power supply failures in the
receivers (I've had to rebuild two of them so far), and SQM cards.  This is
probably due to the fact that this came out of an old VHF Low band system
that was in use since the early 70's.  (And yes, I did convert the receivers
over to UHF with different RX boards.  "Plug and play" for the most part...)

The replacement electrolytic caps (23D83093G13) I received from Motorola
were substantially larger (physically) than the ones that came out of the
old power supply, so I had to modify the receiver cabinet (cut a notch) so
the supply would go back into the cabinet after the repair.  But there isn't
even a HINT of AC in with the DC voltage now.  (Saw 0.9VAC on the 13.8VDC
before the repair... caused the status tone to vary all over the place.)
hehehehe
  
I've also rebuilt five of my SQMs - I had a total of six altogether - so I
now have what I hope will be good spares...  Had to replace the 3
electrolytic caps on the boards - the electrolyte was actually coming out of
the ends of the caps.  Check them - the "aging" effects will be visible.
(Or at least they were to me...)  

One caution - I was told by a Motorola tech NOT to "mess around with" (i.e.,
replace) the one 2% tolerance cap the board.  Apparently changing it can
wreak havoc in trying to get the card working properly again if you don't
get the exact same value.

Interfacing it to my Kenwood TKR-820 repeater was a bit of a challenge, but
has been successfully done - thanks to the assistance of those here on the
list.

Good luck - and I'm sure someone here will be able to remember the
discussion about the modification better than I.  

Sorry...
73 de Mark - N9WYS


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

Has anyone had much luck with a specra tac voter?  I found one at a
good price, but I was wanting to know if it would be worth messing
with for my amateur repeater.  I was told that they require a 100%
transmit on the links, but someone else also told me that they could
be used normally as well. (when a remote receives a signal, the link
keys up)

Any info at all would be appreciated.

Thanks,

Jordan

[Repeater-Builder] Spectra TAC question

[twoway_tech]

Has anyone had much luck with a specra tac voter?  I found one at a
good price, but I was wanting to know if it would be worth messing
with for my amateur repeater.  I was told that they require a 100%
transmit on the links, but someone else also told me that they could
be used normally as well. (when a remote receives a signal, the link
keys up)

Any info at all would be appreciated.

Thanks,

Jordan

[Repeater-Builder] Link Communications Pre-Release Announcement

[Allan Overcast]

Link Communications introduces a new addition to its repeater controller 
family.  The RLC Digital Controller (yet to be named) builds upon the proven 
RLC-3 and RLC-Club designs, while providing advanced features that aren't 
available in any other product.  There are some things that we can already tell 
you about the design, some things that we haven't settled on yet, and some 
things we won't talk about until later :)  We are looking for input to ensure 
that the new system includes the features that are most important to you, our 
customers.

Among the features that we can talk about:

   The audio path will be digital (48K samples/second, better than CD quality). 
 This will allow many features to be implemented without additional hardware 
(digital audio delay, voice recording/storage,squelch, etc) and without any 
loss of audio quality. 
   

   Voice library can be easily updated or extended using standard .wav files. 
   

   New Windows (tm) control software will make reconfiguring things on the fly 
simple, and will provide real-time status, indicating exactly what is going on 
at each moment. 
   

   Improved firmware will retain the flexibility of the RLC-3 and RLC-Club 
series of controllers while making advanced features easier to use.  Some of 
the improvements may also show up in a firmware update for those controllers. 
   

   Modular design will allow easy expansion in increments of four ports (4, 8, 
12...). 
   

   Integrated Ethernet network interface will enable remote management (which 
can be done over the serial port as well), as well as VoIP/RoIP (Voice/Radio 
Over IP), over the Internet or a private network.  Of course the controller 
will work without a network connection, but those features won't be available. 
  

Some of the features we could use feedback about include:

   A good name for the new controller. 
   

   Type of front-panel display you prefer:  LEDs for each signal (similar to 
current controllers), or an interactive LCD display?  Remember that a computer 
running the new management software will provide real-time status too. 

   Frequency-controllable remote base radios: 
  What brand and model of remote base radio you are most likely to use 
(Icom IC-706, Yaesu FT-900, Kenwood TS-440...)?
  
  How many serial ports are needed?  Typically each remote base radio needs 
a serial port for control.   
  Is it worth adding dedicated 1/8" connectors for Icom CI-V radios such as 
the IC-706/7000, or is it better to just use pins on the DB-9 radio port 
connectors for the serial signals?



   Desired use for VoIP/RoIP features: 
  Monitoring the repeater from a computer running the management software. 

  Point to point links between radio sites (replacing RF links or linking 
sites that weren't close enough to link with RF). 

  Interfacing to other VoIP/RoIP networks.  If you would use this feature, 
which systems would you want to interface with (IRLP, Echolink, D-Star...)?  
These interfaces would probably be options. 


   Number/type of I/O lines for site telemetry (remember that these require 
hardware and therefore affect production cost). 
   

   Audio adjustments:  Should the major transmitter and receiver level 
adjustments be made with physical pots or software-controlled pots? 

  The advantage of physical pots is that you can just grab a screwdriver 
and adjust them without having to go though some kind of user interface (minor 
level tweaks would still be possible through software). 
  
  The advantage of software-controlled pots is that you can make even major 
level adjustments remotely. 
  
  If the physical pots were accessible without opening the case would it 
change your answer?



  Things we aren't talking about yet :)

   Subaudible tone (PL/DPL) 

   Price 

   Release date (stop and see us at the Dayton Hamvention for more, hint, 
hint...) 
  
If you have thoughts, ideas, questions, or want updated information, see 
http://digitalrlc.link-comm.com.  We will try to keep that web page up to date 
with any new information and with answers to your questions (at least to the 
ones we are willing to talk about :). 
  
Allan Overcast KF7FW
  Link Communications, Inc.

 
-
Check out the all-new Yahoo! Mail beta - Fire up a more powerful email and get 
things done faster.

[Repeater-Builder] Data Sheet for Decibel Duplexer SP5998.

[w7aor]

Anyone have a Data Sheet for Decibel Duplexer SP5998?

Kent W7AORatNARRI.ORG 

RE: [SPAM] Re: [Repeater-Builder] Re: Battery backup

[Fred Flowers]

This is what he was talking about.

 

http://www.westmountainradio.com/SuperPWRgate.htm

 

 

-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of Doug Zastrow
Sent: Wednesday, January 10, 2007 10:23 PM
To: Repeater-Builder@yahoogroups.com
Subject: [SPAM] Re: [Repeater-Builder] Re: Battery backup

 

Hi Doug,

 

I found what I believe to be the Powergate web site at
http://www.powergatellc.com/ but could not find the PW40S under any of the
categories listed nor through product no. search.

 

Am I at the right web site?  Any hints on finding this model?

 

Doug Z.

- Original Message - 

From: Doug Dickinson   

To: Repeater-Builder@yahoogroups.com 

Sent: Tuesday, January 09, 2007 7:18 PM

Subject: [Repeater-Builder] Re: Battery backup

 

The best arrangement I have seen so far is the Powergate PW40S which has the
built-in 3 stage charger. I have used them and they are really good with a
zero time switchover so none of the little electrons in the controller get
confused and reset or worse, lockup the controller. It also charges the
battery the RIGHT way, with a 3 stage charger. It can be duplicated I am
sure, but at the price, I just would buy it and spend the time tinkering
with the RF for a good repeater.

 

IMHO

 

Doug KC0SDQ

 

[Repeater-Builder] Re: temperature control circuit

[no6b]

At 1/8/2007 15:22, you wrote:
>Hi Bob,
>I would like to get a copy of that circuit if you have one available.
>
>Thanks,

OK, here is the circuit I used.  The original National Semiconductor 
circuit had a 30 K resistor in series with a 400 uF cap., both in parallel 
with the 100 K resistor on the input of the 1st LM324 section.  I found 
that combo to actually destabilize the operation of the controller for this 
particular application, so I removed them & changed the 2 uF cap in series 
with the 10 megohm resistor to 5 uF.  That cap is a non-polarized paper 
capacitor; I believe a 4.7 uF non-polarized ceramic should work as well.

The 1/4 watt heater resistor & LM34 temperature sensor are mounted on the 
same side of the crystal but separated as far apart as possible.

Bob NO6B



445.46 TX temp. stabilization.png
Description: PNG image

Re: [Repeater-Builder] Re: Battery backup

[Charles Schmell]

The Powergate PG40S is  sold by West Mountain Radio
see:
"http://www.westmountainradio.com/SuperPWRgate.htm"; 
(delete the quote marks)

Charles, KB3CEZ

--- Doug Zastrow <[EMAIL PROTECTED]> wrote:

> Hi Doug,
> 
> I found what I believe to be the Powergate web site
> at http://www.powergatellc.com/ but could not find
> the PW40S under any of the categories listed nor
> through product no. search.
> 
> Am I at the right web site?  Any hints on finding
> this model?
> 
> Doug Z.
>   - Original Message - 
>   From: Doug Dickinson 
>   To: Repeater-Builder@yahoogroups.com 
>   Sent: Tuesday, January 09, 2007 7:18 PM
>   Subject: [Repeater-Builder] Re: Battery backup
> 
> 
>   The best arrangement I have seen so far is the
> Powergate PW40S which has the built-in 3 stage
> charger. I have used them and they are really good
> with a zero time switchover so none of the little
> electrons in the controller get confused and reset
> or worse, lockup the controller. It also charges the
> battery the RIGHT way, with a 3 stage charger. It
> can be duplicated I am sure, but at the price, I
> just would buy it and spend the time tinkering with
> the RF for a good repeater.
> 
>   IMHO
> 
>   Doug KC0SDQ
>



 

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