[Repeater-Builder] A few things I'm Trying to Sell off .

[Steve]

Hear is a List of some stuff I am Trying to sell off . If there is anything you 
like Please Contactme at cat2...@aol.com . Pictures Available on request . 
thanks .
For Sale EF Johnson Replacement Display for the 51SL / 5100 / 5100ES Portables 
. $35.00 Shipped .
FS- 2 EFJ-51xx RF Deck Housing and Shields . (REAR HOUSING 5100 PORTABLE) . 
$25.00 Shipped .
FS- 1 EFJ-51xx Series Model 2 Rubber Keypad . $8.00 Shipped .
FS- EFJ-8180CX / 8190CR Viking Programming Cable Kit . $40.00 
FS- GM300 Display Head Housing . No Parts inside . $5.00
FS- GM300 Display Logic Board . $5.00
FS- GM300 LOGIC BOARD - $10.00
FS- GM300 RF LOGIC BOARD - $10.00
FS- GM300 RUBBER Key's - $2.00
FS- SPECTRA Mounting Bracket - $8.00
FS- Saber Housing w/ Belt Clip - $5.00
FS- Saber Screen .NTN4541A - $2.00
FS- Saber DES Securenet Encryption - $25.00
FS- Saber RF PA - 438-470 MHz - $10.00
FS- Saber Saber Logic Board - $10.00
FS- Saber Back Sheilding NTN4647A - $2.00
FS- Saber NLE9461A - $8.00
FS- Motorola HT50 / HT90 Desktop Charger . $20.00 Plus S&H .


Note: All Parts are Used Selling as Is .

[Repeater-Builder] fs ge master 3, 800 mhz repeaters

[dean.endic...@sbcglobal.net]

I have 3 master 3, 800 mhz repeaters. They are the edacs systems and are 
complete. if interested email me direct. 
Thanks. Dean.

[Repeater-Builder] fs test equipment

[dean.endic...@sbcglobal.net]

I have a Tektronic 1503 TDR in working order wither built in printer and new 
battery pack. Also have a Texscan AL-51A spectrum analizer, works good, but may 
need a new battery, It has a DC and AC power cord. Also have a Sinnader 3 that 
I don't even think I used. If interested you can email me offsight. Thanks for 
the bandwith.

Dean.

[Repeater-Builder] Re: K9TRG Art Housholder Silent Key

[George Henry]

I still have one of those HT200 "bricks" in my garage that I use to monitor 
the local 2M repeater when I'm at the workbench.  Runs quite happily as a 
receiver with a 12-volt wall-wart  Battery pack is long gone, drop-in 
charger & speaker/mic are in a box somewhere in the attic.


George, KA3HSW / WQGJ413


- Original Message - 
From: "Laryn Lohman" 
To: 
Sent: Friday, July 10, 2009 10:30 PM
Subject: [Repeater-Builder] Re: K9TRG Art Housholder Silent Key


I entered my name in a drawing at my very first hamfest in 1973 in Muskegon, 
MI.  It was in the FM forum there, and Art presented me as the winner with a 
fine, used, Motorola HT200 two channel *brick*.  This was when no ham-grade 
handhelds existed, only converted, very expensive commercial grade radios. 
Boy was I happy.  Good times...

Thanks Art.

Laryn K8TVZ

[Repeater-Builder] Re: K9TRG Art Housholder Silent Key

[Laryn Lohman]

I entered my name in a drawing at my very first hamfest in 1973 in Muskegon, 
MI.  It was in the FM forum there, and Art presented me as the winner with a 
fine, used, Motorola HT200 two channel *brick*.  This was when no ham-grade 
handhelds existed, only converted, very expensive commercial grade radios.  Boy 
was I happy.  Good times...

Thanks Art.

Laryn K8TVZ

[Repeater-Builder] I have a ton of stuff I need to rid of!

[Preston Moore]

I have a lot of radio gear I am clearing out.  Please check the qrz.com swap 
section for my call sign.  A bunch of repeater related gear is going to go up 
such as CAT controller, Wacom duplexer, DB404 antenna, etc.

Thanks
Preston Moore, N5YIZ



  

RE: [Repeater-Builder] Building HT antennas

[JOHN MACKEY]

On my Azden 10 meter FM HT using the stock rubber duck antenna with a BNC
connector, when I was transmitting listeners noticed a definate increast in
signal when I put my thumb and finger on the BNC connector ground.  So then I
started carrying a 9 foot long wire connected to an aligator clip which I
would connect to the BNC ground and again noticed a definate increase in
signal strength.

But certainly you are correct, a low band HT on a rubber duck has poor
performance.  Despite that, I have worked Sioux City, Iowa to Portland, Oregon
several times on my 3 watt HT on 29.6 Mhz.  I know that K7LJ has worked US to
Japan on his HT-200 (using telescoping antenna) on 29.6 Mhz several times.  

-- Original Message --
Received: Fri, 10 Jul 2009 03:43:24 PM PDT
From: Mike Morris WA6ILQ 
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Building HT antennas

> FWIW I have a 99-channel 42-50MHz MT1000 that I bought with
> the intention of using it for both 6m and 47 MHz Red Cross
> channels.  The radio came with a 32-channel model number,
> but the radio took 99 channels just fine.
> 
> The radio is not in service yet as it needs to be modified from
> the 42-50 MHz range to 46-54 MHz.
> 
> And I do not know if the radio front end (or the transmit VCO)
> will "reach" to both 47mhz and 52-53 MHz.  If anybody has
> done any work in that direction I'd like to hear from you.
> 
> If it does end up to be usable on both I know that I'm going to
> need to have two separate antennas - a shorter one for ham
> and a second, longer one, for Red Cross.
> 
> Over the years I've learned that you should not expect any
> real transmit performance from a low band HT, especially
> an HT200 or an MT1000. Why?
> 
> Two reasons...
> 
> First:
> A 1/4 wave at 52 MHz is about 54 inches (about 4 1/2 feet).  An
> antenna with a decent ground plane would have a 1/4 wave radiator
> and a 1/4 wave ground plane, for a total of just about 9 feet long.
> I can just see a 9 foot long coaxial antenna plugged into a 7 1/2
> inch long radio.
> 
> Second
> The MT1000 uses a hot-only antenna connector, with no ground (at
> least the GP68 got that part right).
> The only way to get a RF ground is to use a cheezy plastic adapter
> that uses an earphone plug to adapt the radio to a length of RG174 coax.
> 
> (see the photos on
> 
> and look above the photo of a hand holding a radio)
> FWIW I've seen a couple of the adapters converted to a BNC mounted
> into the top of the adapter.
> 
> So without re-engineering the radio your choices are a footlong rubber
> duck that would make a good truncheon, or an external antenna.
> And the NAB6064B duck is about $24-$25 each.
> 
> More and more I've been thinking that a crossband repeater from a Red
> Cross UHF frequency (locally there are several already coordinated,
> licensed and in use) to the particular 47 MHz frequency (locally we
> have at least three, one of which is the nationwide 47.42) might just
> be more practical.
> 
> Mike WA6ILQ
> 
> At 01:42 PM 07/10/09, you wrote:
> >Albert,
> >
> >In the 30-50 MHz band, the antennas for a portable radio must be cut for
> >proper operation, over a very narrow range of frequencies.  The length of
a
> >whip antenna must be changed by 1/4-3/8 inch for every 1 MHz.  Motorola
> >still offers the NAB6064B "tunable" antenna for the MT1000 radio, which
must
> >be cut to length for the specific frequency needed.  In other words, there
> >is no such thing as a broadband antenna for low band, and the radio's PA
> >could be damaged by using an antenna that is not the right length.  The
> >NAB6064B antenna costs about $23 from Motorola Parts.  Call 800-422-4210
to
> >order.
> >
> >73, Eric Lemmon WB6FLY
> >
> >
> >-Original Message-
> >From: Repeater-Builder@yahoogroups.com
> >[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Albert
> >Sent: Friday, July 10, 2009 12:56 PM
> >To: Repeater-Builder@yahoogroups.com
> >Subject: [Repeater-Builder] Building HT antennas
> >
> >
> >
> >Hey guys, I posted this question over on the HT600e forum but didn't get
> >anything. I was wondering if anyone here could be of assistance.
> >
> >I recently acquired a low band MT1000 for use on the 6m band. It has a
nice
> >new commercial antenna but I was wanting to do something a little better.
No
> >one that I can find supplies or can supply me with a better antenna for
this
> >radio. Even smiley antenna, my usual go to company for custom antennas for
> >the Genesis line can't help me. So I was thinking of building my own.
> >
> >My first thought, since the antenna connector on the MT1000 is basically a
> >1/4-32 hole, I could thread a piece of aluminum round stock to create a
> >base. Then I could just make a 1/4 wave whip from stainless rod. I know it
> >would be silly long but it is a start. If I do this, do you think I should
> >just use the standard 1/4 wave vertical formula? Would I nee

[Repeater-Builder] Re: Maratrac as a repeater transmitter -connections

[kc0mlt]

Am I correct in thinking to ground the PTT connection to get it to key up? Just 
looking at the diagrams I have, and seeing a voltage on the pin I would think 
so. Also Mic audio to ground or is it some other pin?

Thanks for the reply!

Wade
KC0MLT

--- In Repeater-Builder@yahoogroups.com, Brian Poellnitz  wrote:
>
> kc0mlt wrote:
> > 
> > 
> > 
> > Hello all,
> > 
> > I am looking for some information on getting the maratrac to key up and 
> > the audio connections into the radio wjen using it as a repeater 
> > transmiter. I am powering it with a partial control cable and no control 
> > head. I would like to be able to use the partial contorl cable for all 
> > of the needed connections but I am willing to use the RJ45 programming 
> > port inside the radio if need be. Any help with the connections would be 
> > very appreciated! (what pin /wires, how to actually get the radio to 
> > transmit -gnd the PTT???) things like that.
> > 
> 
> I use a Maratrac as my UHF repeater TX.  Interfacing is easy, with a 
> couple of gotchas.  First, the audio and PTT connections are easy. The 
> RJ45 programming connector at the front edge of the radio uses the same 
> pinout as most Radius mobiles. Pinout is here : 
> http://www.batlabs.com/images/maxrad.gif
> 
> Second, programming tips.  The best way I have found is to program your 
> unit for clamshell control head, and delete all modes (channels) except 
> Mode 1, which is programmed to your TX frequency in both TX and RX.  The 
> gotcha is this: If you have an A7 (advanced) control head, DO NOT hook 
> it up after you program the unit for clamshell. You will BRICK your 
> radio, and I'm not sure if Motorola depot repair will take these radios 
> any more.
> 
> Instructions on powering the radio without a control head are here: 
> http://www.batlabs.com/maratrac.html  about a third of the way down the 
> page.  Basically, pins 17 and 13 to negative, and pins 19 and 4 to +12V. 
>   Make sure your power supply can handle the current draw at your power 
> level.  Speaking of power levels... TURN THE UNIT DOWN to about 60 watts 
> (assuming you have a 100w drawer) and put a fan on it.  This radio is 
> not designed for continuous duty. Give it all the help you can.  Don't 
> go below 60w, as the radio will overheat due to inefficiencies in the 
> PA.  I've found that dialing back the power and using fans works well in 
> a light-to-medium traffic machine.
> 
> Oh, one more thing.  The Maratrac uses a mechanical relay for TX/RX 
> switching.  The relay will last for a while, but it will eventually 
> fail.  I solved this by removing  the T/R relay and running coax 
> directly from the PA output out thru the hole left by the SO-239 
> connector, terminated in an inline SO-239.  Of course, the antenna will 
> no longer be connected to the RX, but hey... we're using this as a 
> dedicated TX anyway, right? :)
> 
> There you go. That should get you on the way to using your Maratrac as a 
> dedicated TX.  I hope anyone with additional info will chime in as well.
> 
> 73's and good luck,
> Brian, N4BWP
>

RE: [Repeater-Builder] RE: Lightning Protection

[ka9qjg]

 

I use Polyphasers on   both My repeaters. How do you know when they fail  ,
Do you automatically loose the signals or as they take different nearby
strikes  or do they gradually deteriorate the signals  Which  might make you
think of other problems. 

 

Thanks 

 

Don KA9QJG 

 

Re: [Repeater-Builder] RE: Lightning Protection [1 Attachment]

[Chuck Kelsey]

Here's some info that might help regarding single-point grounding, attached.


- Original Message - 
From: "Eric Lemmon" 
To: 
Sent: Friday, July 10, 2009 8:01 PM
Subject: RE: [Repeater-Builder] RE: Lightning Protection


> Although Polyphaser protectors have a large and loyal following, they are
> seldom used in high-end commercial two-way and cellular sites, where the
> preference is for Huber+Suhner devices.  H+S protectors are very 
> expensive-
> perhaps four or five times the cost of a Polyphaser- but they are machined
> out of stainless steel, are waterproof, and have easily-replaceable gas 
> tube
> elements that are available in a wide range of ratings.  When you have a
> revenue-producing station that is costly to build, you don't skimp on
> lightning protection.  More info about H+S protectors is here:
>
> 
> or
> 
>
> However, since the majority of non-revenue repeater owners are satisfied
> with Polyphasers, it should be pointed out that there are many models of
> protectors in the Polyphaser catalog.  The purchaser should take care to
> select the particular model that allows the least amount of energy
> let-through for a given operating frequency and power level.  The 
> protectors
> are designed for a specific connection arrangement, and the antenna and
> equipment sides should not be reversed.  The Polyphaser gas tube elements
> are soldered in place, and are not easily replaceable.
>
> Regardless of the brand of lightning protector used, it is very important
> that the protector body have an effective connection to ground over as
> low-impedance path as possible.  Chris' comment about AC power line
> protection is a good one.  Any phone or control lines entering the station
> should also be protected with gas tube arrestors.
>
> 73, Eric Lemmon WB6FLY
>
>

RE: [Repeater-Builder] RE: Lightning Protection

[Eric Lemmon]

Although Polyphaser protectors have a large and loyal following, they are
seldom used in high-end commercial two-way and cellular sites, where the
preference is for Huber+Suhner devices.  H+S protectors are very expensive-
perhaps four or five times the cost of a Polyphaser- but they are machined
out of stainless steel, are waterproof, and have easily-replaceable gas tube
elements that are available in a wide range of ratings.  When you have a
revenue-producing station that is costly to build, you don't skimp on
lightning protection.  More info about H+S protectors is here:


or


However, since the majority of non-revenue repeater owners are satisfied
with Polyphasers, it should be pointed out that there are many models of
protectors in the Polyphaser catalog.  The purchaser should take care to
select the particular model that allows the least amount of energy
let-through for a given operating frequency and power level.  The protectors
are designed for a specific connection arrangement, and the antenna and
equipment sides should not be reversed.  The Polyphaser gas tube elements
are soldered in place, and are not easily replaceable.

Regardless of the brand of lightning protector used, it is very important
that the protector body have an effective connection to ground over as
low-impedance path as possible.  Chris' comment about AC power line
protection is a good one.  Any phone or control lines entering the station
should also be protected with gas tube arrestors.

73, Eric Lemmon WB6FLY
  

-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of ccour79992
Sent: Friday, July 10, 2009 4:13 PM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] RE: Lightning Protection



I agree on the Polyphaser suggestion.

Dont forget the AC power protection. I suggest Transtector SL plug in
series, not cheap, but they work quite well.

Also, how does a Polyphaser fail? Open? Closed? And are they truly multiple
strike capable?

Chris
KC4CMR

[Repeater-Builder] looking for a G.E. deskmate cabinet

[Chris Curtis]

Does anyone around south central Missouri have a G.E. deskmate size (or
possibly even a tall size) rack cabinet they want to get rid of?

Just about done with a repeater project and want to "house" it.

Thanks for the bandwidth.

Chris
Kb0wlf

[Repeater-Builder] RE: Lightning Protection

[ccour79992]

I agree on the Polyphaser suggestion.

Dont forget the AC power protection.  I suggest Transtector SL plug in series, 
not cheap, but they work quite well.

Also, how does a Polyphaser fail? Open? Closed? And are they truly multiple 
strike capable?

Chris
KC4CMR

RE: [Repeater-Builder] Building HT antennas

[Mike Morris WA6ILQ]

FWIW I have a 99-channel 42-50MHz MT1000 that I bought with
the intention of using it for both 6m and 47 MHz Red Cross
channels.  The radio came with a 32-channel model number,
but the radio took 99 channels just fine.

The radio is not in service yet as it needs to be modified from
the 42-50 MHz range to 46-54 MHz.

And I do not know if the radio front end (or the transmit VCO)
will "reach" to both 47mhz and 52-53 MHz.  If anybody has
done any work in that direction I'd like to hear from you.

If it does end up to be usable on both I know that I'm going to
need to have two separate antennas - a shorter one for ham
and a second, longer one, for Red Cross.

Over the years I've learned that you should not expect any
real transmit performance from a low band HT, especially
an HT200 or an MT1000. Why?

Two reasons...

First:
A 1/4 wave at 52 MHz is about 54 inches (about 4 1/2 feet).  An
antenna with a decent ground plane would have a 1/4 wave radiator
and a 1/4 wave ground plane, for a total of just about 9 feet long.
I can just see a 9 foot long coaxial antenna plugged into a 7 1/2
inch long radio.

Second
The MT1000 uses a hot-only antenna connector, with no ground (at
least the GP68 got that part right).
The only way to get a RF ground is to use a cheezy plastic adapter
that uses an earphone plug to adapt the radio to a length of RG174 coax.

(see the photos on

and look above the photo of a hand holding a radio)
FWIW I've seen a couple of the adapters converted to a BNC mounted
into the top of the adapter.

So without re-engineering the radio your choices are a footlong rubber
duck that would make a good truncheon, or an external antenna.
And the NAB6064B duck is about $24-$25 each.

More and more I've been thinking that a crossband repeater from a Red
Cross UHF frequency (locally there are several already coordinated,
licensed and in use) to the particular 47 MHz frequency (locally we
have at least three, one of which is the nationwide 47.42) might just
be more practical.

Mike WA6ILQ

At 01:42 PM 07/10/09, you wrote:
>Albert,
>
>In the 30-50 MHz band, the antennas for a portable radio must be cut for
>proper operation, over a very narrow range of frequencies.  The length of a
>whip antenna must be changed by 1/4-3/8 inch for every 1 MHz.  Motorola
>still offers the NAB6064B "tunable" antenna for the MT1000 radio, which must
>be cut to length for the specific frequency needed.  In other words, there
>is no such thing as a broadband antenna for low band, and the radio's PA
>could be damaged by using an antenna that is not the right length.  The
>NAB6064B antenna costs about $23 from Motorola Parts.  Call 800-422-4210 to
>order.
>
>73, Eric Lemmon WB6FLY
>
>
>-Original Message-
>From: Repeater-Builder@yahoogroups.com
>[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Albert
>Sent: Friday, July 10, 2009 12:56 PM
>To: Repeater-Builder@yahoogroups.com
>Subject: [Repeater-Builder] Building HT antennas
>
>
>
>Hey guys, I posted this question over on the HT600e forum but didn't get
>anything. I was wondering if anyone here could be of assistance.
>
>I recently acquired a low band MT1000 for use on the 6m band. It has a nice
>new commercial antenna but I was wanting to do something a little better. No
>one that I can find supplies or can supply me with a better antenna for this
>radio. Even smiley antenna, my usual go to company for custom antennas for
>the Genesis line can't help me. So I was thinking of building my own.
>
>My first thought, since the antenna connector on the MT1000 is basically a
>1/4-32 hole, I could thread a piece of aluminum round stock to create a
>base. Then I could just make a 1/4 wave whip from stainless rod. I know it
>would be silly long but it is a start. If I do this, do you think I should
>just use the standard 1/4 wave vertical formula? Would I need to compensate
>for the HT's lack of a ground plane?
>
>Any thoughts would be appreciated.
>
>Thanks
>Albert
>KI4ORI

[Repeater-Builder] Need operators manual for COM-SER Laboratories Inc. BR-1000-A service monitor

[ron]

Please Help! I Need operators manual for COM-SER Laboratories Inc. BR-1000-A 
service monitor. I have only been able to find a few schematic diagrams and 
block diagram for this service monitor (from 1979). I have some good pictures 
of this unit up & running... I will try to figure out how to post them here 
shortly. If anyone knows where this unit was made (I know they are not around 
anymore) or where I can get copies of an Operation manual, I would Greatly 
Appreciate it...

[Repeater-Builder] Re: About those Trident LTR Controllers

[skipp025]

They are Trident, which means the programming, setup 
and software is a bit quirky (to me a lesson in how 
to punch the clown face hard). Once you get past the 
installation hurdles they work fairly well and they 
seem to be fairly well constructed.  

LTR Trunking has a lot to offer the commercial radio 
world.  On the ham side you can use them with your 
927.xxx MHz Repeater and some of the more popular 
radios like the Motorola GTX-900 and Kenwood TK-981. 
However, you are not normally allowed to decode carrier 
squelch and CTCSS & DCS signals while using LTR so 
the persons you're talking to need to have it, or 
you run scan with a conventional channel. It all gets
quirky. 

We have LTR Overlay on one 925 MHz box and a co-operational 
conventional box going on the same time. Just for fun 
but it does work. 

cheers, 
s. 

> "radiowavz"  wrote:
>
> Hi Mike Can you tell me what the features are on them? Also what are you 
> looking to get for them? Price or trade?
> TIM
>

Re: [Repeater-Builder] Need Lightning Protection Equipment Recommendatoin for Building Repeater Site

[George Henry]

Polyphaser.

Period.

End of discussion..  ;-)

George, KA3HSW / WQGJ413


>
>From: Mark Thompson 
>To: repea...@yahoogroups.com; Repeater-Builder@yahoogroups.com; 
>repeat...@yahoogroups.com
>Sent: Friday, July 10, 2009 2:11:52 PM
>Subject: [Repeater-Builder] Need Lightning Protection Equipment Recommendatoin 
>for Building Repeater Site
>
>
>
>
>
>I am involved with a ham radio club that has repeaters on the top of a 
>55-story condo building 6 miles north of downtown Chicago on the Lake Michigan 
>lakefront. The club is a general purpose ham club, not a repeater club, and 
>does not seem to have any members who are in the 2-way radio business or have 
>experience with commercial repeater site installations. 
>
>They've had a 70cm FM repeater on this building for about 15 years. It has 
>never had any form of lightning protection equipment protection equipment. The 
>club has been lucky and not experienced any apparent problems from lightning.
>
>Within the last two years the club has replaced it's Icom 70cm FM repeater 
>with a new commercial Motorola 70cm FM repeater. They've also added a D-STAR 
>70cm Digital Voice repeater, a D-STAR 23cm Digital Voice repeater and a D-STAR 
>23cm Digital Data Access Point. It's possible a 23cm FM repeater will also be 
>added soon. 
>
>There are three antennas on the roof currently for 70cm FM, 70cm D-STAR and 
>23cm D-STAR. A fouth antenna may be aded for 23cm FM. All antennas are fed 
>with hardline & ultimately terminated in N connectors at the repeaters. 
>
>It is a very ham friendly site and we can do work on the repeaters & the roof 
>unsupervised. The only other repeater system on the building is a high-band 
>U.S. government repeater adjacent to the ham repeater equipment rack. The 
>government repeater seems to be grounded to a grounding bar running through 
>the equipment room. 
>
>These new repeaters & antennas should have lightning protection. My question 
>to the group is what form of lighning protection would you recommend for these 
>repeaters. I assume Polyphaser equipment is one option, but we need 
>recommendations of specific brands & model #s of equipment with approximate 
>prices if you have them. We plan to review any recommendations received & then 
>forward them to the club's board of directors for acquisition & installation. 
>
>Please reply to me directly and thanks in advance for any advice you have. 
>
>73, Mark, WB9QZB
>Chicago, IL
>

RE: [Repeater-Builder] Building HT antennas

[Eric Lemmon]

Albert,

In the 30-50 MHz band, the antennas for a portable radio must be cut for
proper operation, over a very narrow range of frequencies.  The length of a
whip antenna must be changed by 1/4-3/8 inch for every 1 MHz.  Motorola
still offers the NAB6064B "tunable" antenna for the MT1000 radio, which must
be cut to length for the specific frequency needed.  In other words, there
is no such thing as a broadband antenna for low band, and the radio's PA
could be damaged by using an antenna that is not the right length.  The
NAB6064B antenna costs about $23 from Motorola Parts.  Call 800-422-4210 to
order.

73, Eric Lemmon WB6FLY


-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Albert
Sent: Friday, July 10, 2009 12:56 PM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Building HT antennas



Hey guys, I posted this question over on the HT600e forum but didn't get
anything. I was wondering if anyone here could be of assistance.

I recently acquired a low band MT1000 for use on the 6m band. It has a nice
new commercial antenna but I was wanting to do something a little better. No
one that I can find supplies or can supply me with a better antenna for this
radio. Even smiley antenna, my usual go to company for custom antennas for
the Genesis line can't help me. So I was thinking of building my own.

My first thought, since the antenna connector on the MT1000 is basically a
1/4-32 hole, I could thread a piece of aluminum round stock to create a
base. Then I could just make a 1/4 wave whip from stainless rod. I know it
would be silly long but it is a start. If I do this, do you think I should
just use the standard 1/4 wave vertical formula? Would I need to compensate
for the HT's lack of a ground plane?

Any thoughts would be appreciated.

Thanks
Albert
KI4ORI

Re: [Repeater-Builder] Building HT antennas

[Chris Robinson]

I am assuming this is to be attached to the radio as a typical HT versus a
mag mount design?

 Yes you will need to compensate for a little bit of GP loss, but this wont
make a noticable difference in length.

 the last HT antenna I made was for dual band 2/70cm I used an old
tachometer cable as I found it had the right diameter as well as flex, but
is still rigid enough to work with. This may not work to well on 6 because
of over all length but could still be considered.

 I hope you realize that you will be having an antenna that is a about 3.5
feet, and for portable this may be well over the length desired. The only
real bennift will be the size of connection, it should withstand some stress
a lot better then a SMA or BNC.

while it may sound odd, I used a coloring crayon from kids box to make a
quick was mold of the threaded connector on radio, then went to hardware
store and found some nut expert to find what I needed. Of course this was
more work then needed as I could have just taken the HT in with me and tried
the trial and error method of elimination!

 I am also going to assume you have a SWR/FS meter to work with for proper
tuning.

 Also I dont know if EZNEC program will do HT antennas but you may try to
run it through and see what you get.

 good luck and let us know what you figure out.

 Chris

On Fri, Jul 10, 2009 at 2:55 PM, Albert  wrote:

>
>
> Hey guys, I posted this question over on the HT600e forum but didn't get
> anything. I was wondering if anyone here could be of assistance.
>
> I recently acquired a low band MT1000 for use on the 6m band. It has a nice
> new commercial antenna but I was wanting to do something a little better. No
> one that I can find supplies or can supply me with a better antenna for this
> radio. Even smiley antenna, my usual go to company for custom antennas for
> the Genesis line can't help me. So I was thinking of building my own.
>
> My first thought, since the antenna connector on the MT1000 is basically a
> 1/4-32 hole, I could thread a piece of aluminum round stock to create a
> base. Then I could just make a 1/4 wave whip from stainless rod. I know it
> would be silly long but it is a start. If I do this, do you think I should
> just use the standard 1/4 wave vertical formula? Would I need to compensate
> for the HT's lack of a ground plane?
>
> Any thoughts would be appreciated.
>
> Thanks
> Albert
> KI4ORI
>
>  
>

Re: [Repeater-Builder] Building HT antennas

[Kris Kirby]

On Fri, 10 Jul 2009, Albert wrote:
> Hey guys, I posted this question over on the HT600e forum but didn't 
> get anything. I was wondering if anyone here could be of assistance.
> 
> I recently acquired a low band MT1000 for use on the 6m band. It has a 
> nice new commercial antenna but I was wanting to do something a little 
> better. No one that I can find supplies or can supply me with a better 
> antenna for this radio. Even smiley antenna, my usual go to company 
> for custom antennas for the Genesis line can't help me. So I was 
> thinking of building my own.
> 
> My first thought, since the antenna connector on the MT1000 is 
> basically a 1/4-32 hole, I could thread a piece of aluminum round 
> stock to create a base. Then I could just make a 1/4 wave whip from 
> stainless rod. I know it would be silly long but it is a start. If I 
> do this, do you think I should just use the standard 1/4 wave vertical 
> formula? Would I need to compensate for the HT's lack of a ground 
> plane?
> 
> Any thoughts would be appreciated.

I would think that you would want to do a 1/2 wave helical. This will 
get you closer to resonance without requiring a ground plane and as a 
normal mode helix -- will radiate in a vertical fashion.

That's certainly quite an undertaking. 

--
Kris Kirby, KE4AHR
Disinformation Analyst

[Repeater-Builder] Need Genesis small parts

[Albert]

Hello guys, I am looking for a few small parts for the Motorola Genesis line of 
HT's. If you have the following or other items I would be very interested.

I need the soft rubber monitor buttons that are above the PTT switch. I also 
need the small plastic plate that retains them. I could use several of each.

I also need some of the washers and rubber grommets that go between the radio 
belt clip and body of the radio.

I would also be interested in nice cases, knobs, or similar items.

Thanks
Albert
KI4ORI

[Repeater-Builder] Building HT antennas

[Albert]

Hey guys, I posted this question over on the HT600e forum but didn't get 
anything. I was wondering if anyone here could be of assistance.

I recently acquired a low band MT1000 for use on the 6m band. It has a nice new 
commercial antenna but I was wanting to do something a little better. No one 
that I can find supplies or can supply me with a better antenna for this radio. 
Even smiley antenna, my usual go to company for custom antennas for the Genesis 
line can't help me. So I was thinking of building my own.

My first thought, since the antenna connector on the MT1000 is basically a 
1/4-32 hole, I could thread a piece of aluminum round stock to create a base. 
Then I could just make a 1/4 wave whip from stainless rod. I know it would be 
silly long but it is a start. If I do this, do you think I should just use the 
standard 1/4 wave vertical formula? Would I need to compensate for the HT's 
lack of a ground plane?

Any thoughts would be appreciated.

Thanks
Albert
KI4ORI

[Repeater-Builder] Need Lightning Protection Equipment Recommendatoin for Building Repeater Site

[Mark Thompson]

I am involved with a ham radio club that has repeaters on the top of a 55-story 
condo building 6 miles north of downtown Chicago on the Lake Michigan 
lakefront. The club is a general purpose ham club, not a repeater club, and 
does not seem to have any members who are in the 2-way radio business or have 
experience with commercial repeater site installations. 

They've had a 70cm FM repeater on this building for about 15 years. It has 
never had any form of lightning protection equipment protection equipment. The 
club has been lucky and not experienced any apparent problems from lightning..

Within the last two years the club has replaced it's Icom 70cm FM repeater with 
a new commercial Motorola 70cm FM repeater. They've also added a D-STAR 70cm 
Digital Voice repeater, a D-STAR 23cm Digital Voice repeater and a D-STAR 23cm 
Digital Data Access Point. It's possible a 23cm FM repeater will also be added 
soon. 

There are three antennas on the roof currently for 70cm FM, 70cm D-STAR and 
23cm D-STAR. A fouth antenna may be aded for 23cm FM. All antennas are fed with 
hardline & ultimately terminated in N connectors at the repeaters. 

It is a very ham friendly site and we can do work on the repeaters & the roof 
unsupervised. The only other repeater system on the building is a high-band 
U.S. government repeater adjacent to the ham repeater equipment rack. The 
government repeater seems to be grounded to a grounding bar running through the 
equipment room. 

These new repeaters & antennas should have lightning protection. My question to 
the group is what form of lighning protection would you recommend for these 
repeaters. I assume Polyphaser equipment is one option, but we need 
recommendations of specific brands & model #s of equipment with approximate 
prices if you have them. We plan to review any recommendations received & then 
forward them to the club's board of directors for acquisition & installation. 

Please reply to me directly and thanks in advance for any advice you have. 

73, Mark, WB9QZB
Chicago, IL



  

[Repeater-Builder] Circuit Stickers

[Don]

I got the Below E-Mail from a Friend And Had No idea what the heck was a 
Circuit Sticker , So I looked at the Links ,  this is useful for Building 
Projects So I thought would share the info to the group 

PS Looks like some of the Breadbording Things I have put together But they sure 
did not look this Neat 

Enjoy 

73 De Don KA9QJG 

I will be at the Indy hamfest tomorrow selling Circuit Stickers.
http://www.indianakits.com
http://www.indyhamfest.com/

I will be at table A10 in the commercial building, the one that's 
air-conditioned and in out of the rain.

Circuit Stickers are applied to either perf board, a solderless breadboard, or 
bare copper. Here are some links to some examples.
http://www.indianakits.com/csrx01/
http://www.indianakits.com/csugly01/
http://www.indianakits.com/cscpo01/

Please stop by my table and have a look.

Thanks,

Jim, WD9EYB

RE: [Repeater-Builder] Repeater Desense?

[Eric Lemmon]

 It's difficult to answer that question without more information about your
system.  Please answer these questions:

1.  What make and model antenna was used before you replaced it with the
four-bay antenna?
2.  What make and model antenna is now installed?
3.  How long is the new 1/2" hardline, and is it Andrew LDF4-50 Heliax?
4.  What is the present transmitter power output, measured at the TX output
jack?
5.  What is the receiver 12dB SINAD sensitivity, measured at the RX input
jack?
6.  What type of cable is used to connect the end of the hardline to the
antenna jack on the duplexer?
7.  Do you have the test equipment to verify the tuning of the duplexer?
8.  Have you confirmed that the transmitter is not producing spurious
signals at the RX frequency?

If it turns out that the notch duplexer is not up to par, an economical
solution might be to add a bandpass cavity between the existing notch
duplexer's RX output jack and the repeater's RX input jack.  However, my
personal preference would be to replace the notch duplexer with a BpBr
cavity duplexer, such as a Telewave TPRD-1584 shown here:

You're looking at an expenditure of $1,500 or so, not including
double-shielded jumpers and high-quality connectors.  If the cable in Item
6, above, is anything but RG-214/U, RG-400/U, or Heliflex, that may be the
cause of your problem.  Ideally, that particular jumper should always be
made to order, with the correct connectors on each end- no barrels or
adapters.  RG-213/U, 9913, and LMR-400 are definitely a no-no!

73, Eric Lemmon WB6FLY


-Original Message-
From: Ken Franks [mailto:fra...@godwinschools.org] 
Sent: Friday, July 10, 2009 8:49 AM
To: Eric Lemmon
Subject: RE: [Repeater-Builder] Repeater Desense?

Thanks! I'll check it out after lunch here.  Our IT guy has a little
knowledge since we used to run a TV broadcast out of the school here but it
has been many, many years.  Do you feel that purchasing a BpBr 4-cavity
would be a wise investment for us, over the mobile notch?  What are the
benefits?  This is a part of our District's school safety/security radio
system so we'd like to make it as solid as possible.
 
Thanks!

>>> "Eric Lemmon"  7/10/2009 11:30 AM >>>




Okay, so you definitely have a mobile notch duplexer, which has practically
no bandpass effect since it works entirely by notching out the opposite
frequency in the split. Since the problem began when you changed the
antenna, my suspicion is that the new antenna's pattern allows more TX
signal to bathe the repeater than before. Some versions of Yaesu/Vertex VXR
repeaters were supplied with single-shield jumpers inside the cabinet, and
this allowed some random desense to occur. That happened in my own
VXR-5000, and I completely cured it by replacing the factory jumpers with
RG-400/U double-shielded coax.

The original Vertex jumpers had gray jackets with no identification, so they
were replaced with RG-400/U. If you do make new cables, make them with the
correct connectors on each end, so that you do not have to use any adapters.
I think you're pushing the notch duplexer to the limit of its capability,
and you can test this by dropping the TX power to 15 or 20 watts, and
checking again for desense. Also, you might try temporarily swapping it for
a BpBr four cavity duplexer.

73, Eric Lemmon WB6FLY


-Original Message-
From: Ken Franks [mailto:fra...@godwinschools.org
 ] 
Sent: Friday, July 10, 2009 8:04 AM
To: Eric Lemmon
Subject: RE: [Repeater-Builder] Repeater Desense?

it is a commercial VHF (rx 152, tx 159). yes, the duplexer is mounted
inside. I went to take a look at the make/model and it was not legible due
to a faded sticker. It should be within operating spec's though since it
was the one purchased with the unit and been in service for 3 years. 

Interestingly enough, one of our IT people went to look at it and found that
the closer he held the PT to the duplexer, the dropping of rx when tx'ing
resolved but was pretty fuzzy sounding yet. Then, when he held the PT even
closer and transmitted, it began to operate properly again and no longer
sounded fuzzy.



>>> "Eric Lemmon" mailto:wb6fly%40verizon.net> >
7/10/2009 10:32 AM >>>

If this is a 2m repeater, and the duplexer is mounted inside the VXR-7000
cabinet, it must be a mobile notch duplexer. I don't believe that such a
duplexer can perform with a 600 kHz split. Please elaborate on the make and
model of duplexer you have, and the RX and TX frequencies.

73, Eric Lemmon WB6FLY

-Original Message-
From: Repeater-Builder@yahoogroups.com
 
 
[mailto:Repeater-Builder@yahoogroups.com
 
 ] On Behalf Of kfd29
Sent: Friday, July 10, 2009 6:59 AM
To: Repeater-Builder@yahoogroups.com
 

Re: [Repeater-Builder] SEA ESP1000 220Mhz Repeater

[DCFluX]

Manuals of interest:

http://www.cornerstonesmr.com/pdf/

http://www.cornerstonesmr.com/pdf/ESP1000Instructions.pdf

http://www.cornerstonesmr.com/pdf/ESP1100_Instruction.pdf

http://www.cornerstonesmr.com/pdf/ESP504-520_Service.pdf

Re: [Repeater-Builder] SEA ESP1000 220Mhz Repeater

[DCFluX]

Don't throw them out yet. I was working on a NBFM mod, but just moved
and things are all shook up.

http://groups.yahoo.com/group/Repeater-Builder/files/FluX%20Research/SEA%20ESP1000%28M%29%2C%20ESP1100%28M%29%2C%20ESP-504/

http://pages.cs.wisc.edu/~timc/e/esp504222.html

RE: [Repeater-Builder] 3/4 wave cavity operation at 1296 MHz

[Jeff DePolo]

> What type/model/brand/size of cavities were you using? The 
> first thing that
> comes to mind was that the cavity you were attempting to use?
> 
> --- Jeff

Sorry, hit send too soon.

The first thing that comes to mind was that the cavity you were attempting
to use had geometry that was causing undesirable moding.  If this was a
conventional two-loop bandpass cavity, sweep it over a wide range, look for
any unusual responses such as a "second bump" in the pass response
well-removed from the center resonant frequency.

>From my experimentation, 4" diameter UHF cavities seem to work OK at 1.2 GHz
from a resonance standpoint.

--- Jeff WN3A

Re: [Repeater-Builder] Maxon sm4450sc

[kerinvale]

Thanks for the reply 
 
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
Phone 0749922574 or 0409159932
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: Razvan Daniel
Date: 10/07/2009 21:57:50
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Maxon sm4450sc
 



Hey, 
 
You can use the external card, just shield it as well as possible by
placeing it into a metal grounded case and using double or triple shieldee
coaxial condutors to link it to the radio. This wil prevent any interference
from dispurbing the useful signals. This having said, please take into
consideration that if the TX antenna is at least several meters away then
you should check the feeder, connectors and antenna reflected wave, since
this diturbance should not normlly happen in good configuration. I have also
noticed that for some reason, the internal decoder takes a wihile to react
to the carier CTSS signal. It may be a design glitch or it may be possible
that a optional delay might exist via software. I never checked. For these
reasons, I think the external card is best. 
 
Regards, 
 
Buie Daniel Razvan
RADIOCOM Bihor
004 741 133740
buie.raz...@radiotelecomunicatii.ro
www.radiotelecomunicatii.ro
 

 

--- On Fri, 7/10/09, kerinvale  wrote:


From: kerinvale 
Subject: [Repeater-Builder] Maxon sm4450sc
To: Repeater-Builder@yahoogroups.com
Date: Friday, July 10, 2009, 4:35 AM


Hi guys .I have a maxon sm4450sc  that is setup for rx ctcss decode in a
repeater and it is  decoding ctcss ok but it  only activates the call led
when the signal is over the squelch level. I am wondering is there a way
that the radio decoder can be on  all the time so even if the signal is
below the squelch the radio will activate the call led without affecting the
audio squelch level.
I tried to use ctcss external decoder card and they work great with direct
connection to the receiver audio out from the detector but as I have found
out recently with the cards outside the radio they are affected badly with
rf when the transmitter is activated if the leads are too long so I have
setup the radio to decode the ctcss and this is working well but it is slow
to activate the repeater.I am trying to set the receiver up that it will
decode as soon as the signal is present instead of it needing it to be over
the squelch level before decoding. 
 
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela. 4715
Phone 0749922574 or 0409159932
www.kerinvalecomaud io.com.au
 
 

 






 

[Repeater-Builder] FS/FT: MOTO tone reeds

[Chris Curtis]

How goes it?

I have, in a box, the following Motorola tone elements:

Kln 6209a
88.5
91.5
127.3
131.8 x3
192.8
206.5 x2

Kln 6210a
82.5
141.3
146.2

Tln 6824a
67.0
103.5
127.3 x2
156.7
162.2
167.9
179.9
192.8

Tln8381a
67.6
94.8 x2
103.5
107.2
118.8
131.8
141.3
146.2
151.4
156.7
167.9

Tln6492 ba
118.8
151.4

I'd like to find some GE tone elements, the big red ones.
110.9hz

I'd also like to unload this box all at once.
=]

Thanks for the bandwidth!
Chris
Kb0wlf

RE: [Repeater-Builder] Repeater Desense?

[Eric Lemmon]

Okay, so you definitely have a mobile notch duplexer, which has practically
no bandpass effect since it works entirely by notching out the opposite
frequency in the split.  Since the problem began when you changed the
antenna, my suspicion is that the new antenna's pattern allows more TX
signal to bathe the repeater than before.  Some versions of Yaesu/Vertex VXR
repeaters were supplied with single-shield jumpers inside the cabinet, and
this allowed some random desense to occur.  That happened in my own
VXR-5000, and I completely cured it by replacing the factory jumpers with
RG-400/U double-shielded coax.

The original Vertex jumpers had gray jackets with no identification, so they
were replaced with RG-400/U.  If you do make new cables, make them with the
correct connectors on each end, so that you do not have to use any adapters.
I think you're pushing the notch duplexer to the limit of its capability,
and you can test this by dropping the TX power to 15 or 20 watts, and
checking again for desense.  Also, you might try temporarily swapping it for
a BpBr four cavity duplexer.

73, Eric Lemmon WB6FLY
   

-Original Message-
From: Ken Franks [mailto:fra...@godwinschools.org] 
Sent: Friday, July 10, 2009 8:04 AM
To: Eric Lemmon
Subject: RE: [Repeater-Builder] Repeater Desense?

it is a commercial VHF (rx 152, tx 159).  yes, the duplexer is mounted
inside.  I went to take a look at the make/model and it was not legible due
to a faded sticker.  It should be within operating spec's though since it
was the one purchased with the unit and been in service for 3 years. 
 
Interestingly enough, one of our IT people went to look at it and found that
the closer he held the PT to the duplexer, the dropping of rx when tx'ing
resolved but was pretty fuzzy sounding yet.  Then, when he held the PT even
closer and transmitted, it began to operate properly again and no longer
sounded fuzzy.
 
 


>>> "Eric Lemmon"  7/10/2009 10:32 AM >>>




If this is a 2m repeater, and the duplexer is mounted inside the VXR-7000
cabinet, it must be a mobile notch duplexer. I don't believe that such a
duplexer can perform with a 600 kHz split. Please elaborate on the make and
model of duplexer you have, and the RX and TX frequencies.

73, Eric Lemmon WB6FLY


-Original Message-
From: Repeater-Builder@yahoogroups.com
 
[mailto:Repeater-Builder@yahoogroups.com
 ] On Behalf Of kfd29
Sent: Friday, July 10, 2009 6:59 AM
To: Repeater-Builder@yahoogroups.com
 
Subject: [Repeater-Builder] Repeater Desense?

Just replaced a damaged mast for our VHF repeater. Went with a 4-bay dipole
as a replacement, along with switching out the old coax with 1/2" hardline.
Everything else stayed the same, VXR-7000 and internal duplexer. All worked
well after a final check, until night came along, when it seems to possible
to a casulty of desense? In base mode, tx and rx are wonderful, but when
switched to repeater mode as soon as it rx's and attempts to transmit, it
cuts itself out. About a one second in, out, back in, out, etc. Not sure
what happened but around mid-day it started working fine again, then last
night started acting up again. Any thoughts? suggestions? Did recheck all
connections from antenna down and everything is tight.

RE: [Repeater-Builder] 3/4 wave cavity operation at 1296 MHz

[Jeff DePolo]

> Bench testing showed the cavities performed as expected in 
> 1/4 wave mode,
> but no amount of loop tweaking or black magic cursing could 
> get the insertion
> loss to acceptable levels when operated in 3/4 wave mode 
> (1296 MHz). Typical
> IL was 2 to 3dB per can at these frequencies. All test cable 
> losses were
> "accounted for".

What type/model/brand/size of cavities were you using?  The first thing that
comes to mind was that the cavity you were attempting to use?

--- Jeff

RE: [Repeater-Builder] Repeater Desense?

[Eric Lemmon]

If this is a 2m repeater, and the duplexer is mounted inside the VXR-7000
cabinet, it must be a mobile notch duplexer.  I don't believe that such a
duplexer can perform with a 600 kHz split.  Please elaborate on the make and
model of duplexer you have, and the RX and TX frequencies.

73, Eric Lemmon WB6FLY
 

-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of kfd29
Sent: Friday, July 10, 2009 6:59 AM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Repeater Desense?



Just replaced a damaged mast for our VHF repeater.  Went with a 4-bay dipole
as a replacement, along with switching out the old coax with 1/2" hardline.
Everything else stayed the same, VXR-7000 and internal duplexer. All worked
well after a final check, until night came along, when it seems to possible
to a casulty of desense? In base mode, tx and rx are wonderful, but when
switched to repeater mode as soon as it rx's and attempts to transmit, it
cuts itself out. About a one second in, out, back in, out, etc. Not sure
what happened but around mid-day it started working fine again, then last
night started acting up again. Any thoughts? suggestions? Did recheck all
connections from antenna down and everything is tight.

Re: [Repeater-Builder] Repeater Desense?

[Maire-Radios]

what does the watt meter show?  normal? reflected?

  - Original Message - 
  From: Ken Franks 
  To: Repeater-Builder@yahoogroups.com 
  Sent: Friday, July 10, 2009 10:16 AM
  Subject: Re: [Repeater-Builder] Repeater Desense?


  I was wondering the same... are you thinking a bad duplexers? or maybe 
re-tuning?

  >>> "K5IN"  7/10/2009 10:13 AM >>>


  Sounds like a temperature related issue.  You might recheck the duplexers and 
even knock on their housing while testing.  

  I am no expert but am only throwing out suggestions.


  Brian
- Original Message - 
From: Maire-Radios 
To: Repeater-Builder@yahoogroups.com 
Sent: Friday, July 10, 2009 7:08 AM
Subject: Re: [Repeater-Builder] Repeater Desense?



waterproof connections?

  - Original Message - 
  From: kfd29 
  To: Repeater-Builder@yahoogroups.com 
  Sent: Friday, July 10, 2009 9:58 AM
  Subject: [Repeater-Builder] Repeater Desense?


  Just replaced a damaged mast for our VHF repeater. Went with a 4-bay 
dipole as a replacement, along with switching out the old coax with 1/2" 
hardline. Everything else stayed the same, VXR-7000 and internal duplexer. All 
worked well after a final check, until night came along, when it seems to 
possible to a casulty of desense? In base mode, tx and rx are wonderful, but 
when switched to repeater mode as soon as it rx's and attempts to transmit, it 
cut's itself out. About a one second in, out, back in, out, etc. Not sure what 
happened but around mid-day it started working fine again, then last night 
started acting up again. Any thoughts? suggestions? Did recheck all connections 
from antenna down and everything is tight.

Re: [Repeater-Builder] Repeater Desense?

[Ken Franks]

I was wondering the same... are you thinking a bad duplexers? or maybe re-tuning?>>> "K5IN"  7/10/2009 10:13 AM >>>


Sounds like a temperature related issue.  You might recheck the duplexers and even knock on their housing while testing.  
 
I am no expert but am only throwing out suggestions.
 
 
Brian

- Original Message - 
From: Maire-Radios 
To: Repeater-Builder@yahoogroups.com 
Sent: Friday, July 10, 2009 7:08 AM
Subject: Re: [Repeater-Builder] Repeater Desense?



waterproof connections?
 

- Original Message - 
From: kfd29 
To: Repeater-Builder@yahoogroups.com 
Sent: Friday, July 10, 2009 9:58 AM
Subject: [Repeater-Builder] Repeater Desense?


Just replaced a damaged mast for our VHF repeater. Went with a 4-bay dipole as a replacement, along with switching out the old coax with 1/2" hardline. Everything else stayed the same, VXR-7000 and internal duplexer. All worked well after a final check, until night came along, when it seems to possible to a casulty of desense? In base mode, tx and rx are wonderful, but when switched to repeater mode as soon as it rx's and attempts to transmit, it cut's itself out. About a one second in, out, back in, out, etc. Not sure what happened but around mid-day it started working fine again, then last night started acting up again. Any thoughts? suggestions? Did recheck all connections from antenna down and everything is tight.

<><>

Re: [Repeater-Builder] Repeater Desense?

[K5IN]

Sounds like a temperature related issue.  You might recheck the duplexers and 
even knock on their housing while testing.  

I am no expert but am only throwing out suggestions.


Brian
  - Original Message - 
  From: Maire-Radios 
  To: Repeater-Builder@yahoogroups.com 
  Sent: Friday, July 10, 2009 7:08 AM
  Subject: Re: [Repeater-Builder] Repeater Desense?






  waterproof connections?

- Original Message - 
From: kfd29 
To: Repeater-Builder@yahoogroups.com 
Sent: Friday, July 10, 2009 9:58 AM
Subject: [Repeater-Builder] Repeater Desense?


Just replaced a damaged mast for our VHF repeater. Went with a 4-bay dipole 
as a replacement, along with switching out the old coax with 1/2" hardline. 
Everything else stayed the same, VXR-7000 and internal duplexer. All worked 
well after a final check, until night came along, when it seems to possible to 
a casulty of desense? In base mode, tx and rx are wonderful, but when switched 
to repeater mode as soon as it rx's and attempts to transmit, it cut's itself 
out. About a one second in, out, back in, out, etc. Not sure what happened but 
around mid-day it started working fine again, then last night started acting up 
again. Any thoughts? suggestions? Did recheck all connections from antenna down 
and everything is tight.




  

Re: [Repeater-Builder] Repeater Desense?

[Maire-Radios]

waterproof connections?

  - Original Message - 
  From: kfd29 
  To: Repeater-Builder@yahoogroups.com 
  Sent: Friday, July 10, 2009 9:58 AM
  Subject: [Repeater-Builder] Repeater Desense?





  Just replaced a damaged mast for our VHF repeater. Went with a 4-bay dipole 
as a replacement, along with switching out the old coax with 1/2" hardline. 
Everything else stayed the same, VXR-7000 and internal duplexer. All worked 
well after a final check, until night came along, when it seems to possible to 
a casulty of desense? In base mode, tx and rx are wonderful, but when switched 
to repeater mode as soon as it rx's and attempts to transmit, it cut's itself 
out. About a one second in, out, back in, out, etc. Not sure what happened but 
around mid-day it started working fine again, then last night started acting up 
again. Any thoughts? suggestions? Did recheck all connections from antenna down 
and everything is tight.



  

[Repeater-Builder] Repeater Desense?

[kfd29]

Just replaced a damaged mast for our VHF repeater.  Went with a 4-bay dipole as 
a replacement, along with switching out the old coax with 1/2" hardline.  
Everything else stayed the same, VXR-7000 and internal duplexer.  All worked 
well after a final check, until night came along, when it seems to possible to 
a casulty of desense?  In base mode, tx and rx are wonderful, but when switched 
to repeater mode as soon as it rx's and attempts to transmit, it cut's itself 
out.  About a one second in, out, back in, out, etc.  Not sure what happened 
but around mid-day it started working fine again, then last night started 
acting up again.  Any thoughts? suggestions?  Did recheck all connections from 
antenna down and everything is tight.

[Repeater-Builder] Re: Vibrasponder KLN 6209A 123.0Hz..

[ve3ext]

try Ted at MDM in Chicago !Google  his website 

Jerry VE3 EXT

Re: [Repeater-Builder] Vibrasponder KLN 6209A 123.0Hz..

[Scott Zimmerman]

James,

I have indeed (4) 162.2Hz KLN6209's here.

Send me a private e-mail and we'll bicker. HIHI

Scott

Scott Zimmerman
Amateur Radio Call N3XCC
474 Barnett Road
Boswell, PA 15531


James Adkins wrote:
> 
> 
> I also am in need of 4 of the 162.2 Hz vibrasponders.  I have 4 203.5 Hz 
> if anyone needs them, or maybe I could trade them for the frequency I need.
> 
> On Thu, Jul 9, 2009 at 12:37 PM, Carmen J Peca  > wrote:
> 
> 
> 
> Hi All, I am in need of a Motorola Vibrasponder KLN 6209A Freq.
> 123.0 Hz. If anyone has one to sell please let me know.
> 
> Or if you can steer me in the right direction to try and locate one
> that would work also.
> 
>  
> 
> Thanks,
> 
> Carm,WO3T
> 
> 
> 
> 
> -- 
> James Adkins, KB0NHX
> Vice-President -- Nixa Amateur Radio Club, Inc. (KC0LUN)
> www.nixahams.net 
> 
> The Nixa Amateur Radio Club - "There is no charge for awesomeness!" 
> (Well, only $1.00 per month)
> 
> 
> 
> 
> 
> 
> 
> 
> No virus found in this incoming message.
> Checked by AVG - www.avg.com 
> Version: 8.5.375 / Virus Database: 270.13.9/2228 - Release Date: 07/09/09 
> 18:07:00
> 

Re: [Repeater-Builder] Vibrasponder KLN 6209A 123.0Hz..

[Scott Zimmerman]

Carm,

I have a '6210 that should work fine. I can bring it to the Somerset 
hamfest next weekend if you're going to make it.

BTW: A good local hamfest for those in the Allegheny region of Pennsylvania:
http://www.k3smt.org/hamfest/index.shtml

Come up to the mountains - The RF is GREAT!!

Scott

Scott Zimmerman
Amateur Radio Call N3XCC
474 Barnett Road
Boswell, PA 15531


Carmen J Peca wrote:
> 
> 
> Hi All, I am in need of a Motorola Vibrasponder KLN 6209A Freq. 123.0 
> Hz. If anyone has one to sell please let me know.
> 
> Or if you can steer me in the right direction to try and locate one that 
> would work also.
> 
>  
> 
> Thanks,
> 
> Carm,WO3T
> 
> 
> 
> 
> 
> 
> 
> 
> 
> No virus found in this incoming message.
> Checked by AVG - www.avg.com 
> Version: 8.5.375 / Virus Database: 270.13.9/2228 - Release Date: 07/09/09 
> 18:07:00
> 

Re: [Repeater-Builder] 3/4 wave cavity operation at 1296 MHz

[Joe]

Hello,

Looking at W6NBC's article, he warns that operating in the harmonic mode 
will result in higher losses.  Maybe 2-3 db may not be unreasonable for 
this mode.  The other thing he warns about is maximum diameter of the 
cavity.  He says that the cavity diameter can't be more than 1/3 
wavelength in diameter.  For 1296 that would be less than 3 inches?

What are the diameter of the cans?

73, Joe, K1ike


kitsca...@iprimus.com.au wrote:
> Hi there,
>
>
> I've had some success rebuilding & tuning 1/4 wave cavities for 146 MHz by
> playing around with loop sizes, orientation etc and being fortunate to have
> had access to an HP-Agilent VNA to "help along".  (W6NBC's excellent article
> on cavity loop optimisation was found  I had pulled out most of my
> hair ...but I digress.)  

Re: [Repeater-Builder] Maxon sm4450sc

[Razvan Daniel]

Hey, 
 
You can use the external card, just shield it as well as possible by placeing 
it into a metal grounded case and using double or triple shieldee coaxial 
condutors to link it to the radio. This wil prevent any interference from 
dispurbing the useful signals. This having said, please take into consideration 
that if the TX antenna is at least several meters away then you should check 
the feeder, connectors and antenna reflected wave, since this diturbance should 
not normlly happen in good configuration. I have also noticed that for some 
reason, the internal decoder takes a wihile to react to the carier CTSS signal. 
It may be a design glitch or it may be possible that a optional delay might 
exist via software. I never checked. For these reasons, I think the external 
card is best. 
 
Regards, 
 
Buie Daniel Razvan
RADIOCOM Bihor
004 741 133740
buie.raz...@radiotelecomunicatii.ro
www.radiotelecomunicatii.ro
 

 

--- On Fri, 7/10/09, kerinvale  wrote:


From: kerinvale 
Subject: [Repeater-Builder] Maxon sm4450sc
To: Repeater-Builder@yahoogroups.com
Date: Friday, July 10, 2009, 4:35 AM













Hi guys .I have a maxon sm4450sc  that is setup for rx ctcss decode in a 
repeater and it is  decoding ctcss ok but it  only activates the call led when 
the signal is over the squelch level. I am wondering is there a way that the 
radio decoder can be on  all the time so even if the signal is below the 
squelch the radio will activate the call led without affecting the audio 
squelch level.
I tried to use ctcss external decoder card and they work great with direct 
connection to the receiver audio out from the detector but as I have found out 
recently with the cards outside the radio they are affected badly with rf when 
the transmitter is activated if the leads are too long so I have setup the 
radio to decode the ctcss and this is working well but it is slow to activate 
the repeater.I am trying to set the receiver up that it will decode as soon as 
the signal is present instead of it needing it to be over the squelch level 
before decoding. 
 


Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela. 4715
Phone 0749922574 or 0409159932
www.kerinvalecomaud io.com.au
  


 






















  

Re: [Repeater-Builder] Vibrasponder KLN 6209A 123.0Hz..

[James Adkins]

I also am in need of 4 of the 162.2 Hz vibrasponders.  I have 4 203.5 Hz if
anyone needs them, or maybe I could trade them for the frequency I need.

On Thu, Jul 9, 2009 at 12:37 PM, Carmen J Peca wrote:

>
>
>  Hi All, I am in need of a Motorola Vibrasponder KLN 6209A Freq. 123.0 Hz.
> If anyone has one to sell please let me know.
>
> Or if you can steer me in the right direction to try and locate one that
> would work also.
>
>
>
> Thanks,
>
> Carm,WO3T
>
> 
>



-- 
James Adkins, KB0NHX
Vice-President -- Nixa Amateur Radio Club, Inc. (KC0LUN)
www.nixahams.net

The Nixa Amateur Radio Club - "There is no charge for awesomeness!" (Well,
only $1.00 per month)

[Repeater-Builder] Maxon sm4450sc

[kerinvale]

Hi guys .I have a maxon sm4450sc  that is setup for rx ctcss decode in a
repeater and it is  decoding ctcss ok but it  only activates the call led
when the signal is over the squelch level. I am wondering is there a way
that the radio decoder can be on  all the time so even if the signal is
below the squelch the radio will activate the call led without affecting the
audio squelch level.
I tried to use ctcss external decoder card and they work great with direct
connection to the receiver audio out from the detector but as I have found
out recently with the cards outside the radio they are affected badly with
rf when the transmitter is activated if the leads are too long so I have
setup the radio to decode the ctcss and this is working well but it is slow
to activate the repeater.I am trying to set the receiver up that it will
decode as soon as the signal is present instead of it needing it to be over
the squelch level before decoding. 
 
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
Phone 0749922574 or 0409159932
www.kerinvalecomaudio.com.au
 
 


 

Re: [possible spam] Re: [Repeater-Builder] LTR Controllers

[NORM KNAPP]

Gentlemen,
Sorry for the misunderstanding. I have absolutly no need whatsoever for those. 
Thanks anyways. Ask me sometimes off list about LTR controllers.
73 de N5NPO

- Original Message -
From: Repeater-Builder@yahoogroups.com 
To: Repeater-Builder@yahoogroups.com 
Sent: Fri Jul 10 00:27:08 2009
Subject: [possible spam]  Re: [Repeater-Builder] LTR Controllers



Depends how much, too.

Joe M.

NORM KNAPP wrote:
> Need? Such a strong word to use when talking about those.
> 
> - Original Message -
> From: Repeater-Builder@yahoogroups.com 
>   
> mailto:Repeater-Builder%40yahoogroups.com> 
> >
> To: Repeater-Builder@yahoogroups.com 
>   
> mailto:Repeater-Builder%40yahoogroups.com> 
> >
> Sent: Thu Jul 09 19:36:00 2009
> Subject: [Repeater-Builder] LTR Controllers
> 
> 
> 
> Does anyone need some Trident TNT LTR controllers.
> 
> 
> 
> Mike
> 
> 
> 
> 
> 
> 
> 
> 
> Yahoo! Groups Links
> 
> 
> 
> 

[Repeater-Builder] K9TRG Art Housholder Silent Key

[Don]

Many on this Group knew or have heard of Art I recall going to Spectronics over 
35 yrs ago and digging through all the boxes of Old Motorola Parts , I Finally 
found a Xtal trimmer for a old Tube type Motorola receiver on 42.42 ,

When I went to Pay I Met Art and He told Me 25 Cents and What was My Ham call , 
Well I did not have one at that time , And He said well since it is for a 
receiver and You came all the here from Indiana I will let You get it this time 
but get Your Ham Lic and rest is History 

I know He worked With Lefty at MDM http://www.mdmradio.com/

And Bob at http://www.theportableclinic.com/

They were making Scanning Radios and Repeaters out of Motorola Equipment before 
Most of us was Born 

Our Thought and Prayers go out to His family and Friends Don KA9QJG 

It is with deep regret that I report the death of Mr. Art Housholder, K9TRG. 
Art was proprietor of Spectronics Inc of Oak Park, IL for many years during the 
1970s! He sold used Motorola gear to hams in those early days of amateur 
repeater development

Arthur E. Housholder a longtime resident of Elk Grove Village A memorial 
service for Arthur E. Housholder, 82, will be held at 10 a.m. Saturday, July 
11, at St. Michael the Archangel Cemetery, Palatine. Mr. Housholder passed away 
Tuesday, July 7, 2009, at Alexian Brothers Medical Center. Art Housholder, like 
a select few of the kids of his generation, was bitten by the amateur radio 
bug, and became seriously infected at K9RTG. And what could be more fun than 
running a ham radio store* In the late 1960s his store, Spectronics, was a 
Chicago center for a new amateur radio technology called repeaters ... a 
technology that would help change the whole world as cell phones ... bringing 
personal communications to over two billion people. Amateurs, frustrated by the 
limited line-of-sight range of their little hand-talkies, began putting 
automatic relaying stations atop tall buildings and mountains, giving them a 
hundred or more miles range instead of a mile or two. And Art was one of the 
leaders of the revolution by using his close contacts with Motorola to convince 
them to pioneer the cell phone industry, where they are still a major player. 
He was also awarded as a member of the Circumnavigators Club, an exclusive 
international organization open only to people who have voyaged around the 
world, crossing every meridian, in a single trip. Members include the likes of 
Neil Armstrong, Sally Ride and Walter L. Cronkite. He was the beloved husband 
of Ada; loving father of Anne Marie, Ann Cristine, Bob/Mary, Steve/Faye Marie 
and Gary/Mary; proud grandfather of Matt, Mark, Julie, Andy and Katrina; 
great-grandfather of Hunter, Brook and Kira; fond brother of Alice O'Day; and 
close friend of Wayne Green, Dick McKay, Frank Mercurio and Dave Zatler. For 
more information, call Elegy Cremation and Memorial Services, 877-565-7070. 

Link to Sign On Line Book 

http://www.legacy.com/gb2/default.aspx?bookid=4578564640112

[Repeater-Builder] Vibrasponder KLN 6209A 123.0Hz..

[Carmen J Peca]

Hi All, I am in need of a Motorola Vibrasponder KLN 6209A Freq. 123.0 Hz. If
anyone has one to sell please let me know. 

Or if you can steer me in the right direction to try and locate one that
would work also.

 

Thanks,

Carm,WO3T

[Repeater-Builder] HLN4181APR

[radiowavz]

Does anyone know if this is possible to use for a tone panel on a Parallax 
Micro Controller? 

[Repeater-Builder] 3/4 wave cavity operation at 1296 MHz

[Kit Scally]

Hi there,

[[ Please excuse if this is "double posted.]]


I've had some success rebuilding & tuning 1/4 wave cavities for 146 MHz by 
playing around with loop sizes, orientation etc and being fortunate to have had 
access to an HP-Agilent VNA to "help along".  (W6NBC's excellent article on 
cavity loop optimisation was found  I had pulled out most of my hair 
...but I digress.)  

Our local radio club in VK2 is attempting to get a 1296 MHz D-STAR repeater 
operational and we need a suitable diplex filter.  (We're currently running a 6 
cavity filter for 2 metres using a hybrid combiner for the D-STAR & analogue
repeaters.)   First thoughts were to use 450 MHz cavities operated in 3/4
wave mode.

Bench testing showed the cavities performed as expected in 1/4 wave mode, but 
no amount of loop tweaking or black magic cursing could get the insertion loss 
to acceptable levels when operated in 3/4 wave mode (1296 MHz).  Typical IL was 
2 to 3dB per can at these frequencies.  All test cable losses were "accounted 
for".

Are we doing anything wrong or missing some critical bit of magic "fairy dust" 
that needs to be done when operating cavities in this mode ? There seems to be 
an total lack of information on the web on 3/4 wave cavity building and 
operation.

If this is approach is a "lost cause", what do others use for 1296 MHz diplex 
filter hardware ?  All suggestions gratefully received either on or off-line.
(vk...@iprimus.com.au)


Cheers,


Kit

VK2LL
Sydney

[Repeater-Builder] 3/4 wave cavity operation at 1296 MHz

[kitscally]

Hi there,


I've had some success rebuilding & tuning 1/4 wave cavities for 146 MHz by
playing around with loop sizes, orientation etc and being fortunate to have
had access to an HP-Agilent VNA to "help along".  (W6NBC's excellent article
on cavity loop optimisation was found  I had pulled out most of my
hair ...but I digress.)  

Our local radio club in VK2 is attempting to get a 1296 MHz D-STAR repeater
operational and we need a suitable diplex filter.  (We're currently running
a 6 cavity filter for 2 metres using a hybrid combiner for the D-STAR & analogue
repeaters.)   First thoughts were to use 450 MHz cavities operated in 3/4
wave mode.

Bench testing showed the cavities performed as expected in 1/4 wave mode,
but no amount of loop tweaking or black magic cursing could get the insertion
loss to acceptable levels when operated in 3/4 wave mode (1296 MHz).  Typical
IL was 2 to 3dB per can at these frequencies.  All test cable losses were
"accounted for".

Are we doing anything wrong or missing some critical bit of magic "fairy
dust" that needs to be done when operating cavities in this mode ? There
seems to be an total lack of information on the web on 3/4 wave cavity building
and operation.

If this is approach is a "lost cause", what do others use for 1296 MHz diplex
filter hardware ?  All suggestions gratefully received either on or off-line.
(vk...@iprimus.com.au)


Cheers,


Kit

VK2LL
Sydney

Re: [Repeater-Builder] for sale: 420 MHz linking radios, voter

[First Nametim Wood]

I agree we need some prices...
Im very interested in the encoder/decoder
TIM

--- On Wed, 7/8/09, Fred Esteves  wrote:

From: Fred Esteves 
Subject: Re: [Repeater-Builder] for sale: 420 MHz linking radios, voter
To: Repeater-Builder@yahoogroups.com
Date: Wednesday, July 8, 2009, 6:58 AM
















  
  Do you have prices

--- On Tue, 7/7/09, Matthew Kaufman  wrote:


From: Matthew Kaufman 
Subject: [Repeater-Builder] for sale: 420 MHz linking radios, voter
To: Repeater-Builder@ yahoogroups. com
Date: Tuesday, July 7, 2009, 11:01 AM




Over the past two decades I've been accumulating gear to link all my 
repeaters together. But as I posted a few weeks back, I'm now linking 
everything with VoIP. There's at least three generations of equipment 
listed below, and I need to clear out the entire inventory in order to 
make space and help fund future repeater system development.

Please make offers, equipment is located near Santa Cruz, CA:

Hamtronics:
1 REP-200N 10 watt repeater w/no controller, type N connectors. RX is 
441 MHz, TX is 420 MHz.
6 R304-2 UHF synthesized receiver, wired and tested, mounted in A89 
enclosure
3 T304-2 UHF synthesized exciter, wired and tested, mounted in A88 
enclosure

Yaesu/Vertex:
1 Rare UHF-Low VXR-5000 repeater (40H259J) (spec for 400-420 MHz) 
w/internal AC power supply

Icom:
40+ F420-9 403-430 MHz 32-channel mobile radio (25 in good condition, 
others have various issues,
 mostly
display problems. Also have 16 custom cables to access internal 
connector discriminator audio + COS
for use as link receiver, 8 custom cables to access internal 
connector TX audio + PTT for use as link
transmitter.

GE:
12+ Mastr Exec low-power full-duplex mobiles, "77" range (SX55FAS77A) 
with internal mobile duplexer
Misc spare control heads, high-power Mastr Exec PAs, etc.

LDG:
1 RVS-8 repeater voter

Com-Spec:
Handful of TS-64 CTCSS Encoder/Decoder
1 TP-3200 repeater tone panel (rack-mount)

Motorola:
2+ Micor UHF mobile, converted to duplex repeater operation

Matthew Kaufman
matt...@matthew. at



  
 

  




 

















  

[Repeater-Builder] Re: LTR Controllers

[radiowavz]

Hi Mike Can you tell me what the features are on them? Also what are you 
looking to get for them? Price or trade?
TIM

Re: [Repeater-Builder] for sale: 420 MHz linking radios, voter

[Matthew Kaufman]

Fred Esteves wrote:
> 
> 
> Do you have prices

As I stated in the original listing, please make offers.

Note that the GE gear is already spoken for (though the buyer may not be 
able to use all of it) and the RVS-8 is so popular that I'll be listing 
it on eBay.

Matthew Kaufman