Re: [Repeater-Builder] Min Separation for VHF, no duplexer, 2 ants?

[Joe Montierth]

--- courir26 <[EMAIL PROTECTED]> wrote:
> I have an academic question for the group (point me
> to a manual or 
> online reference if needed).
> 
> If one was to build a VHF repeater, say 10W
> transmit, two antennas 
> and no duplexer, what is the minimum frequency
> separation needed?
> 
> I know it depends on a lot of things, such as power,
> receiver front 
> end, vertical and horizontal ant sep, etc.
>
> Any rule of thumb?
> 
> 73 tom
> 
> 


The minimum freq separation would be one channel, but
you'd have to have lots of antenna separation to make
that work effectively (like a mile horizontal). Are
you not wanting to use a 600 KHz split?

We had a commercial repeater operating on a 150 KHz
split in the 160MHz band, with about 60 ft of vertical
separation, it worked OK.

If you're talking about antenna separation, at 600 KHz
of freq separation, 50 ft vertical will give you about
65 dB of isolation. This would probably be a minimum
figure, with a good clean TX and a good tight RX
without a pre-amp. Adding a notch or BP/BR cavity to
the TX and RX line would improve things also, if it
doesn't perform well without them.

Joe





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Re: [Repeater-Builder] Min Separation for VHF, no duplexer, 2 ants?

[Q]

Thats funny,my service monitor IS calibrated in feet!
- Original Message -
From: Ken Arck <[EMAIL PROTECTED]>
To: 
Sent: Saturday, April 17, 2004 3:32 PM
Subject: Re: [Repeater-Builder] Min Separation for VHF, no duplexer, 2 ants?


> At 03:31 PM 4/17/2004 -0400, you wrote:
>
> >100 feet vertical or 300 feet horizontal separation.
>
> <100 feet of frequency of separation? Hmmm, my service monitor isn't
> calibrated in feet!
>
> (sorry, couldn't resist)
>
> Ken
>
> >
> --

> President and CTO - Arcom Communications
> Makers of state-of-the-art repeater controllers and accessories.
> http://www.ah6le.net/arcom/index.html
> AH6LE/R - IRLP Node 3000
> http://www.irlp.net
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>






 
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Re: [Repeater-Builder] NHRC 4/M2 Remote Base Audio

[Adam C. Feuer]

Jeff,

Just the answer I was looking for!  Thanks Jeff!!

Adam N2ACF
- Original Message - 
From: "Jeff Otterson" <[EMAIL PROTECTED]>
To: 
Sent: Saturday, April 17, 2004 6:19 PM
Subject: Re: [Repeater-Builder] NHRC 4/M2 Remote Base Audio


> Hi,
>
>The remote base receiver audio input on the NHRC-4/M2 is set up for
> de-emphasized audio as shipped.
>
>If you want to use discriminator audio and de-emphasize on the
> controller, you need to change R19 to 510 K, change R20 to 51K, and
install
> a .0068 uf cap in location C10.  See page 2 of the schematic.
>
>Regards,
>
>Jeff
>
>
> At 05:43 PM 4/17/2004, you wrote:
> >Hello All,
> >
> >Today, I fed the remote base receive audio input of an NHRC 4/M2 with
> >descriminator audio from a Motorola Maxtrac. I'm taking the audio right
from
> >the 16pin accy plug on the radio.  When listening to the primary port of
the
> >controller, the remote base audio seems a "bit" high pitched and not
rolled
> >off enough.
> >
> >Has anyone else experienced this on this controller or perhaps I'm doing
> >something wrong?
> >
> >Any help would be greatly appreciated. Thanks!
> >
> >Adam N2ACF
> >
> >
> >
> >
> >
> >
> >
> >Yahoo! Groups Links
> >
> >
> >
> >
>
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
>
>






 
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Re: [Repeater-Builder] NHRC 4/M2 Remote Base Audio

[Jeff Otterson]

Hi,

   The remote base receiver audio input on the NHRC-4/M2 is set up for 
de-emphasized audio as shipped.

   If you want to use discriminator audio and de-emphasize on the 
controller, you need to change R19 to 510 K, change R20 to 51K, and install 
a .0068 uf cap in location C10.  See page 2 of the schematic.

   Regards,

   Jeff


At 05:43 PM 4/17/2004, you wrote:
>Hello All,
>
>Today, I fed the remote base receive audio input of an NHRC 4/M2 with
>descriminator audio from a Motorola Maxtrac. I'm taking the audio right from
>the 16pin accy plug on the radio.  When listening to the primary port of the
>controller, the remote base audio seems a "bit" high pitched and not rolled
>off enough.
>
>Has anyone else experienced this on this controller or perhaps I'm doing
>something wrong?
>
>Any help would be greatly appreciated. Thanks!
>
>Adam N2ACF
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>
>





 
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[Repeater-Builder] NHRC 4/M2 Remote Base Audio

[Adam C. Feuer]

Hello All,

Today, I fed the remote base receive audio input of an NHRC 4/M2 with
descriminator audio from a Motorola Maxtrac. I'm taking the audio right from
the 16pin accy plug on the radio.  When listening to the primary port of the
controller, the remote base audio seems a "bit" high pitched and not rolled
off enough.

Has anyone else experienced this on this controller or perhaps I'm doing
something wrong?

Any help would be greatly appreciated. Thanks!

Adam N2ACF






 
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[Repeater-Builder] desktrac

[philaprogramming]

i got a desktrac and it's set at 15 watts how can i get more out of 
it.thanks bob





 
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Re: [Repeater-Builder] Min Separation for VHF, no duplexer, 2 ants?

[Mike Morris]

At 03:17 PM 4/17/04 +, you wrote:

>I have an academic question for the group (point me to a manual or
>online reference if needed).
>
>If one was to build a VHF repeater, say 10W transmit, two antennas
>and no duplexer, what is the minimum frequency separation needed?
>
>I know it depends on a lot of things, such as power, receiver front
>end, vertical and horizontal ant sep, etc.
>
>Any rule of thumb?
>
>73 tom

Vertical is more effective than horizontal since increasing the vertical
moves the receiving antenna further out of the pattern than increasing
the horizontal, and using horizontal separation really increases the
feedline losses.

These may help:



Mike WA6ILQ 





 
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Re: [Repeater-Builder] Min Separation for VHF, no duplexer, 2 ants?

[Ken Arck]

At 03:31 PM 4/17/2004 -0400, you wrote:

>100 feet vertical or 300 feet horizontal separation.

<100 feet of frequency of separation? Hmmm, my service monitor isn't
calibrated in feet!

(sorry, couldn't resist)

Ken

>
--
President and CTO - Arcom Communications
Makers of state-of-the-art repeater controllers and accessories.
http://www.ah6le.net/arcom/index.html
AH6LE/R - IRLP Node 3000
http://www.irlp.net




 
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Re: [Repeater-Builder] Min Separation for VHF, no duplexer, 2 ants?

[Q]

100 feet vertical or 300 feet horizontal separation.

- Original Message - 
From: courir26 <[EMAIL PROTECTED]>
To: 
Sent: Saturday, April 17, 2004 11:17 AM
Subject: [Repeater-Builder] Min Separation for VHF, no duplexer, 2 ants?


> I have an academic question for the group (point me to a manual or 
> online reference if needed).
> 
> If one was to build a VHF repeater, say 10W transmit, two antennas 
> and no duplexer, what is the minimum frequency separation needed?
> 
> I know it depends on a lot of things, such as power, receiver front 
> end, vertical and horizontal ant sep, etc.
> 
> Any rule of thumb?
> 
> 73 tom
> 
> 
> 
> 
> 
> 
> 
> 
>  
> Yahoo! Groups Links
> 
> 
> 
>  
> 






 
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Re: [Repeater-Builder] Looking for UHF BpBr Duplexer

[Rick - VA3RZS/Charlotte - VA3CMR]

I have a pair of moto UHF's $200

On 17 Apr 2004 at 6:54, Roger Ewing wrote:

> I am Looking for UHF BpBr Duplexer.
> If you have a set e-mail me at  [EMAIL PROTECTED]
> 
> 
> 
> 
> 
> 
> 
> Yahoo! Groups Links
> 
> 
> 
> 
> 


Rick Szajkowski VA3 RZS
Charlotte Darby VA3 CMR
Node Owners of IRLP Node 2120
Lakefield Ont Canada






 
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[Repeater-Builder] Looking for UHF BpBr Duplexer

[Roger Ewing]

I am Looking for UHF BpBr Duplexer.
If you have a set e-mail me at  [EMAIL PROTECTED]






 
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[Repeater-Builder] Min Separation for VHF, no duplexer, 2 ants?

[courir26]

I have an academic question for the group (point me to a manual or 
online reference if needed).

If one was to build a VHF repeater, say 10W transmit, two antennas 
and no duplexer, what is the minimum frequency separation needed?

I know it depends on a lot of things, such as power, receiver front 
end, vertical and horizontal ant sep, etc.

Any rule of thumb?

73 tom








 
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[Repeater-Builder] UHF Midland, motorola, kenwood radios

[wavecomm1]

All used..will program and tuned to your specs..450-470 MHz...Make 
me an offer..Have much Midland and motorola lowband as well...35-
42MHz and 42-50MHz..do not have motorola programming though.  Lots 
of stuff here people.
Icabod






 
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Re: [Repeater-Builder] EFJ PPL6060 Oscillator Schematic

[Eric Lemmon]

Tony,

Yeah, these PPL6060 radios are pretty well beat up, but they do work and
they were free!  My club may be getting a dozen more, in the near
future.  Still, I cannot seem to find an original service manual.

As of the FRR yesterday, the weather was 70% for a launch.  However, the
window is one second wide, which gives us no opportunity for a recycle. 
We can slip 24 hours once, then it is down for a couple of days.

73, Eric Lemmon WB6FLY

tony dinkel wrote:
> 
> Somewhere around I remember having a brand new one but I am going to have to
> dig.  I always considered them a bit of a toy but they held up pretty good
> in trash trucks for a plastic radio.
> 
> Have you heard any predictions for the wx for Gravity Probe B monday?  I
> would like to watch but 200 miles is a long drive for a scrub.
> 
> td
> wb6mie
> 
> >Date: Thu, 15 Apr 2004 20:38:07 -0700
> >From: Eric Lemmon <[EMAIL PROTECTED]>
> >Subject: EFJ PPL6060 Oscillator Schematic
> >
> >My radio club recently acquired several EF Johnson PPL6060 UHF mobile
> >radios, and I would like to use them for 9600 baud digital links.
> >Unfortunately, I have no schematic diagram of the oscillator circuitry
> >to assist me in making the appropriate modifications and/or connections.
> 
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> 
> 
> 
>




 
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[Repeater-Builder] EFJ PPL6060 Oscillator Schematic

[tony dinkel]

Somewhere around I remember having a brand new one but I am going to have to 
dig.  I always considered them a bit of a toy but they held up pretty good 
in trash trucks for a plastic radio.

Have you heard any predictions for the wx for Gravity Probe B monday?  I 
would like to watch but 200 miles is a long drive for a scrub.

td
wb6mie


>Date: Thu, 15 Apr 2004 20:38:07 -0700
>From: Eric Lemmon <[EMAIL PROTECTED]>
>Subject: EFJ PPL6060 Oscillator Schematic
>
>My radio club recently acquired several EF Johnson PPL6060 UHF mobile
>radios, and I would like to use them for 9600 baud digital links.
>Unfortunately, I have no schematic diagram of the oscillator circuitry
>to assist me in making the appropriate modifications and/or connections.

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[Repeater-Builder] Re: Dual polarization

[Laryn Lohman]

Circular polarization is interesting to me too.  What were the 
results of the antenna you described below?

Also check out this:

  http://www.wa7x.com/cycloid_info.html

Laryn K8TVZ



> 
>Date: Wed, 14 Apr 2004 11:04:00 -0700 (PDT)
>From: bradley glen <[EMAIL PROTECTED]>
> Subject: dual polarisation uhf repeater antenna
> 
> In th the process of making my tests on a dual
> polaarisation antenna for my uhf repeater (one of
> many).
> 
> I am persueing something that I should have done a
> long time ago.I have had reasonable success with
> opting for a site that needed 270deg coverage which
> made what I have done within reason.
> 
> I have taken a standard commercial 4-stack-removed the
> top dipole-replaced it with a 6dB collinear for the
> vertical polarisation.
> 
> The remaining three folded dipoles I have place in the
> horizontal pane at 0-90-180.(still experimenting with
> the spacing)
> 
> The idea and theory is to reduce the deep nulls in
> mobile and portable comms.
> 
> I would like to hear from anyone that has any comments
> and experience in doing this-suely I can not be the
> first to do so.
> 
> I have a keen interest in dual pol antenna arrays so
> if you have any articles I would appreciate the
> sitesand your comments.
> 
> Regards
> 
> Brad   Node : 8300





 
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[Repeater-Builder] GE FOR SALE

[Q]

1) GE MastrII VHF 110watt cont.duty base station/repeater in 4 foot cabinet
with GE 30 amp power supply,crystalled and tuned to 146.10/.70 $500
2) GE MastrII VHF 110 watt mobile to repeater conversion,currently on
146.04/.64 $225
3) GE MastrII 12/26 volt power supplies from 800mhz stations,3 available at
$100 each
4) GE mastrII 110 watt VHF mobiles,no accys, $75 each
5) GE MastrII VHF 250 watt cont.duty base station/repeater in cabinet.Pick
up only   , $750

All prices plus shipping,US funds. PLEASE REPLY DIRECT ONLY
 to:  n3app"at"verizon.net   Thanks for looking!






 
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[Repeater-Builder] Possible Unlicensed Operation in the Deep South...

[Steve Grantham]

In recent days (nights), the band conditions being a bit longer for
two-meters than usual, we have been hearing some Chinese language stations
(..definitely sounds like an oriental language..) transmitting on 146.010
MHz.  Such stations are being heard around midnight CDT, plus or minus a
couple of hours, coming through the local club repeater here in Laurel MS.

I suspect that this may be foreign shipping traffic, either off shore in the
Gulf of Mexico, or navigating on the Mississippi River.  It sounds like the
two operators are communicating inter-ship, and possibly using marine-VHF or
other 2-meter station antennae mounted somewhere high up on ship.  (Could be
ship to shore intercom too..)

I have an idea that this may be coming from the Convent Louisiana area,
where a Chinese rice shipping terminal is located.  If there are any
stations down south with rotatable Yagi antennae, please listen and let me
know the bearing from your location to the source of any such signals.
Please keep a log of times, etc.

Also, if you are able to monitor and record these signals, that would be
helpful too.. Particularly if you are able to receive them on the repeater
input frequency (146.010 MHz.)

I appreciate your assistance in this matter.  If you are unable to help,
then please excuse the bandwidth.

Thanks!
Steve Grantham, AA5SG
Laurel / Ellisville MS






 
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Re: [Repeater-Builder] FCC considers Auxiliary Operation on 2M!

[Joe Montierth]

--- "Jim B." <[EMAIL PROTECTED]> wrote:
> Doesn't matter-in fact a repeater that's tied up all
> day with chatter 
> isn't available for emergency communications. Plus
> the more time it 
> spends keyed up, the less time till something fails.
> 
> -- 
> Jim Barbour
> WD8CHL
> 
> 
> Fred Flowers wrote:
> 
> > Yeah, but does anybody talk on all of them?
> > 
> > 
> > 
> >>From: "Jim B." <[EMAIL PROTECTED]>
> >>Reply-To: Repeater-Builder@yahoogroups.com
> >>To: Repeater-Builder@yahoogroups.com
> >>Subject: Re: [Repeater-Builder] FCC considers
> Auxiliary Operation on 2M!
> >>Date: Fri, 16 Apr 2004 16:01:15 -0400
> >>
> >>Joe Montierth wrote:
> >>
> >>
> >>
> >>>In many parts of the US the 2M band is
> under-utilized,
> >>>so I am not opposed to the idea, per-se. If
> everyone
> >>>used good common sense, there shouldn't be many
> >>>problems, but I can see how people feel about
> this
> >>>based on their local conditions.
> >>>
> >>>Joe
> >>>
> >>>Joe
> >>>
> >>
> >>I'd sure like to know where you're gettin the idea
> that 2M is
> >>'underutilized'! Everywhere I've been (in the US),
> there's plenty of
> >>repeaters. Most areas there's too many!
> >>
> >>--
> >>Jim Barbour
> >>WD8CHL
> >>

A couple of comments:

1. If I had an emergency, I would go to the channel
with the chatter on it, because that's where the
people are, and thats where you'll get a response. It
does no good to yell your brains out for help on a
"quiet" channel, if no one's there to answer you.

Also, as far as an unused repeater being less subject
to failure, this is just not true. A well designed
repeater will not "wear out" do to heavy use, ask
anyone on this board who runs a well designed system.
They're not afraid of people using it, or seeing it
keyed for hours at a time. If you had to have a
message hand delivered to someone two miles away,
would you give it to the "couch potato" or the
marathon runner? The couch potato should be all rested
and ready to run that 2 miles, and the marathon man
should be too worn out from his miles of practice in
the last few weeks. But reality tells us it's no sweat
for one of them, and a major challenge for the other.

2. One area where 2M is underutilized is here where I
live. I can hit 3 2M repeaters with a handheld, and
maybe 10 more with a good base. This is typical
throughout our county and neighboring counties. Our
county is the size of Connecticut. This is very
typical of the rural western states.

3. Repeaters aren't all there are on 2M. With the
normal bandplans being used today, there are at least
45 channels available for simplex use, exclusive of
any repeater input or output. Even if half these
channels were being used in any given area, that would
still mean over 20 vacant channels for new usage. In
most areas, over 90% of the simplex channels are
vacant 90% of the time.

4. In reality, the 2M repeater output channels that
were out of range from a certain location could be
used by aux type systems, with no interference caused
or received. The use of PL and/or DTMF or other codes
could further reduce this.

Joe




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[Repeater-Builder] wavetek

[ian wells]

hi guys i have started a new group for wavetek service/test equipment 
[EMAIL PROTECTED]

Thank you
Ian Wells
Kerinvale Comaudio
mail service 1017,
Biloela,4715.
www.kerinvalecomaudio.com.au
[EMAIL PROTECTED]





 
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Re: [Repeater-Builder] Looking at a UHF repeater...

[Ray Brown]

- Original Message - 
From: "Juber, Stanley C." <[EMAIL PROTECTED]>

> What do you plan to use the repeater for?

  I was planning on letting my hospital's Security use it.

  I am the radio officer for my hospital, and I know that we never have used MED
frequencies at any of our 3 facilities. We have the HEAR simplex radios, at
155.340 simplex. A competiting hospital (1 mile north of our biggest facility)
is still licensed to use MED frequencies, but I know that they only use one of
the MED frequencies and that's for dispatching their helicopter.

  < snip >

> The exact
> use for each channel, as well as frequency coordination for these channels,
> must be approved by your state's emergency medical service (EMS) regulatory
> agency - and the EMS regulatory agency must sign off on your application if
> you plan to use the MED frequencies, or other frequencies reserved for
> medical use.

  The State of Missouri's EMS agency does not regulate radio frequencies any
longer. Personally, I think that they ought to, but they don't. I will admit 
that things
back your way (back east) are far more structured. I did a Google search only on
462.975, and got over 1,000 hits. I found one example of non-EMS, high-powered
licensing in use (oddly enough, for security for a hospital). What was 
interesting was
that I also found this frequency in use (low power) at NASCAR racetracks by some
of the NASCAR drivers! But that's a different subject, not going there. :-)

> My point is, that use of the MED channels is highly structured, and you need
> to make sure that what you want to do fits in with your state's plan.  The
> folks in charge of your emergency room should be able to tell you which
> agency regulates EMS in your state.

As I said, our state currently has no plan. The biggest cities, Kansas City 
and St.
Louis, went ahead and implemented their plans when the MED freq's first came up.

  I went ahead and bought it a few days ago, but I haven't had time to check 
with the
IAFC for coordination. It'd be interesting to hear what they say.

  And I know it's definitely not modern. It was owned by our local ambulance
company, but I don't think it's been turned on in several years.

  And, if all else fails, I'll tweak it into a GMRS repeater, or maybe even 
down into
the ham band.

_Ray_KBØSTN





 
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Re: [Repeater-Builder] Motorola Mitrek T83JJA3900DK

[Neil McKie]

  Not continuous duty transmit.  Perhaps 25 - 30 watts out. 

  Neil 

Mike Morris WA6ILQ wrote:
> 
> At 10:15 PM 4/16/04 +, you wrote:
> 
> >Motorola Mitrek T83JJA3900DK, Can this radio be programed to work as
> >a repeater ?
> 
> Made into a repeater, yes.
> 
> Programmed, no - there are no microprocessors in it.
> Frequency control is done by crystals.
> 
> Mike WA6ILQ
> 
> 
> Yahoo! Groups Links
> 
> 
> 
>





 
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Re: [Repeater-Builder] Need help in layout

[Mike Morris WA6ILQ]

At 12:41 AM 4/17/04 +, you wrote:

>Design help needed.
>
>I'd like to take a Selectone ST138 to a maxtrac receiver in a
>Desktrac.
>
>I want it to latch and toggle the output to a 12V relay.  So when I
>key the
>portable with that PL it will close and when I key it the second time
>it
>will open.

How will you protect it from false triggering on a power outage?
Or if you aren't around and somebody pops up and keys down
with "your" tone?  This is why a lot of hams designed touchtone
decoders into their control systems back in the 1980s...

But, since you asked how to do it...

First get the PL decoder connected to the receiver and working
properly.  I'm going to leave the hookup to you... See
www.selectone.com or www.com-spec.com for details.

For an indication, just connect a LED and a series resistor
to the decode output and when you have that working reliably
you can go to the next step.

To get the functionality you want all you need to do is connect
a ratchet relay (sometimes called an impulse relay or a
one-coil-latching relay) keyed by the PL decoder output.

The mechanical design of this type of relay insures that the
first pulse closes the contacts, next pulse turns it off.
Picture a garage door opener - a ratchet relay controls
motor direction and if the ceiling light is on or off.

One source of relays of this type is All Electronics, a
surplus outfit in Los Angeles.  Their web site is at
http://www.allelectronics.com and they have a 5-volt
ratchet relay at

and a 12-volt one at


If you are an experimenter type, you can find a
used high current one at the auto junkyard.
Several european cars, Volvo included, use a ratchet
relay to switch between high beams and low beams - the
trigger switch is a momentary button built into the base of
the turn signal lever.

Mike WA6ILQ 





 
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Re: [Repeater-Builder] Motorola Mitrek T83JJA3900DK

[Mike Morris WA6ILQ]

At 10:15 PM 4/16/04 +, you wrote:

>Motorola Mitrek T83JJA3900DK, Can this radio be programed to work as
>a repeater ?

Made into a repeater, yes.

Programmed, no - there are no microprocessors in it.
Frequency control is done by crystals.

Mike WA6ILQ






 
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[Repeater-Builder] Micor Vibrasenders Wanted - 100.0

[[EMAIL PROTECTED]]

I need a few Motorola PL Transmit ("Vibrasender") reeds for 100.0 Hz (1Z
Tone) that I can use in several MICOR Repeaters. Typical Motorola reed
numbers are TLN6824A, KLN6210A, and probably numerous other small, 4-pin
Vibrasender reeds will be okay. I have plenty of the Receive reeds
("Vibrasponders"), I need only the transmit reeds. I have others to trade
or can buy outright.

Larry K7LJ





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Re: [Repeater-Builder] Need help in layout

[Virden Clark Beckman]

Use a flip-flop circuit. But If you have any chance for innermod you
will experience troubles galore, that is why dtmf sequences are used
rather than random pl signals.

Rich wrote:
> 
> Design help needed.
> 
> I'd like to take a Selectone ST138 to a maxtrac receiver in a
> Desktrac.
> 
> I want it to latch and toggle the output to a 12V relay.  So when I
> key the
> portable with that PL it will close and when I key it the second time
> it
> will open.

-- 
73...Clark Beckman N8PZD




 
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Re: [Repeater-Builder] FCC considers Auxiliary Operation on 2M!

[Neil McKie]

  I agree Larry, very true. 

  Neil - WA6KLA 

"[EMAIL PROTECTED]" wrote:
> 
> Plenty of Repeaters, but lots fewer users. Most repeaters are quiet
> compared to just a few years ago. Take a listen on 2-Meters - Los Angeles,
> Seattle, Boston, D.C., Chicago, San Francisco, Denver, Dallas. Anywhere.
> LJ
> 
> Original Message:
> -
> From: Jim B. [EMAIL PROTECTED]
> Date: Fri, 16 Apr 2004 16:01:15 -0400
> To: Repeater-Builder@yahoogroups.com
> Subject: Re: [Repeater-Builder] FCC considers Auxiliary Operation on 2M!
> 
> Joe Montierth wrote:
> 
> >
> > In many parts of the US the 2M band is under-utilized,
> > so I am not opposed to the idea, per-se. If everyone
> > used good common sense, there shouldn't be many
> > problems, but I can see how people feel about this
> > based on their local conditions.
> >
> > Joe
> >
> > Joe
> >
> 
> I'd sure like to know where you're gettin the idea that 2M is
> 'underutilized'! Everywhere I've been (in the US), there's plenty of
> repeaters. Most areas there's too many!
> 
> --
> Jim Barbour
> WD8CHL
> 
> 
> Yahoo! Groups Links
> 
> 
> 
> 
> mail2web - Check your email from the web at
> http://mail2web.com/ .
> 
> 
> Yahoo! Groups Links
> 
> 
> 
>





 
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Re: [Repeater-Builder] Re: Decibel repeater antenna question-unbalanced radiating loops

[Paul Guello]

If I remeber right it came out to 5/4 wavelength ( they all had to be odd multiples of the 1/4 wave length) and the bays are each 100 ohms.
PaulJoe Montierth <[EMAIL PROTECTED]> wrote:
--- Paul Guello <[EMAIL PROTECTED]>wrote:> I found the link to the information on the Decibel> harness. It's still on the KC5DGC web site. The> discussion on the list was that it was mostly> correct.> http://www.kc5dgc.net/db224.htm> > Paul kb9wlc> I see one big problem with the measurements. It saysthat all coax sections are QW long. How can you spacethe elements at .9 WL and have only 2 QW long piecesbetween them?Judging from the cable and the lengths listed, eachdipole must present a 100 ohm impedence, not 50,assuming the data is correct.If these are 100 ohm dipoles, a simpler way to phasethem might be to use 1 wavelength of 75 ohm on eachdipole, then tee the upper 2 and lower 2 together.This should give 50 ohms on each pair, at each tee.Then couple the two halves
 together with equal odd QWlengths of 75 ohm coax. Probably 7/4 wavelength oneach leg to a tee. The impedence at this final teeshould be 50 ohms, assuming each dipole is 100 ohmseach.Joe__Do you Yahoo!?Yahoo! Tax Center - File online by April 15thhttp://taxes.yahoo.com/filing.htmlYahoo! Groups Links<*> To visit your group on the web, go to:http://groups.yahoo.com/group/Repeater-Builder/<*> To unsubscribe from this group, send an email to:[EMAIL PROTECTED]<*> Your use of Yahoo! Groups is subject to:http://docs.yahoo.com/info/terms/
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Re: [Repeater-Builder] Need help in layout

[Ken Arck]

At 12:41 AM 4/17/2004 -, you wrote:

>I want it to latch and toggle the output to a 12V relay.  So when I 
>key the portable with that PL it will close and when I key it the second
time 
>it will open.

<---Cheap and easy control, eh? :-)
Without knowing exactly what you're up to, the fastest way to do it is
probably with a D-type flip flop. If you don't know what this is, it is
probably beyond the scope of this list

Ken

--
President and CTO - Arcom Communications
Makers of state-of-the-art repeater controllers and accessories.
http://www.ah6le.net/arcom/index.html
AH6LE/R - IRLP Node 3000
http://www.irlp.net




 
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[Repeater-Builder] Need help in layout

[Rich]

Design help needed.

I'd like to take a Selectone ST138 to a maxtrac receiver in a 
Desktrac.

I want it to latch and toggle the output to a 12V relay.  So when I 
key the
portable with that PL it will close and when I key it the second time 
it
will open.







 
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