6 meter receiver and 440 control link. Ready for crystals and programming..
then, very soon, install into remote receive site.
KC 6 meter project update
KC 6 meter Repeater project Update Nov. 1st, 2013
Thanks to the efforts of Chuck Kraly K0XM and the Backyard Repeater group..
The KC 6-meter project will now be allowed to use the Downtown Kansas City
Commerce Bldg for its 6-meter transmitter site.
This means we now have a central location for the transmitter.
I am told that the site has an existing 6-meter antenna; hard line and
control shed area and has been used in the past as a stand-alone site.
We think the Split site operation should allow better sensitivity and
certainly we will be able to crank up the power if need be!
Thank You Chuck Kraly!
Access to that site should come; I am told, in the next few weeks.
The past week we have been trying to reprogram the Motorola 440 Martrack
and Radius radios for a 430 range control / Link to that central location..
Thanks to BJ Huff in his spare time for assisting us with that effort.
We are having difficulty, as the rigs don’t seem to want to go that low.
We are now pursuing alternatives for the control / Link frequency.
The rock bound Micor 110 watt transmitter should be operational
in the next few weeks.
We welcome a new participant in the group.. WV0T ..
He and others in that group have an existing 6 meter repeater that
has been pledged to incorporate into the project to serve as a node
for the Midtown area.
He has offered and We are considering..
Putting his existing programmable 100-watt transmitter on the Commerce Building.
Might speed things up.. For a single link.. Might be a good test.
However the project will still be aimed at allowing several area remote
low power access receive nodes.
We are excited to have them aboard!
So now we have a Centralized transmit site and 4 ea. Committed locations
for the 6 meter split site receive nodes.
Node # 1. Michael Barelli W0MAF. of N. W. Independence, MO.
Covering Independence, N. E. KC Metro and probably a radius of
several miles. He is out by the Twin Drive In Theatre NW of Independence, MO.
Node #2 Dan Stark N0CRD, Olathe, KS Serving Olathe, Gardner,
Spring Hill and Lenexa, KS area.
Node # 3 (Asked to be Anonymous) But positioned well in the middle of Raytown.
Node # 4 WV0T, Phillip Leonard and group.. Serving the Mid Town Area.
What started out to be a simple split site 6 meter project is starting
to blossom into a real workable plan. We have accumulated a lot of link
control radios and when we get them programmed..
The RF links will be activated. Your Yaesu 5 watt portable vx7, 8 or
other dual band radio will be able to work this system..
If you are anywhere near a 6-meter receive node.
The plan is to also have at each site a computer / controller ie;
Earth Station software / or similar, with Internet access.
But in the beginning we will be analog and RF..
Once the system is up and while it is expanding we will start the conversion.
It will not be just for 6 meters.. but some new exciting possibilities.
1. Looking for help in reprogramming a Motorola Radius / and select
Maxtrac UHF link radios.
2. Need help in reprogramming a Motorola Mitrak (low band).
3. Looking for more 440 style 2 ways to make available for more area
4. Looking for more 6 meter receivers capable of receiving 51.27 FM
in order to add new areas / links.
5. Looking for a Motorola Spectra UHF Mobile Radio D44KMA7JA5BK UHF
Or a MaxTrac 300… either,
(looking for the feature of a Scan function scanning multiple channels
on receive only)
6. Looking for new unserved areas to set a 6 meter receive node.
We want to acknowledge Bruce Cassida and the Paola, KS WSWA group for their
donation of 3 Maxtrc 440 radios for use with the control links. That’s it for now! Wow! I hope we can start getting this thing on the air by Christmas!!
Or even better.. by Thanksgiving!
6 meter project update, Sept 13, 2013.
1. Just wanted to make all aware of the latest things happening. I did get one controller working..
It is my shack master 100.. You may hear and talk to it on 52.7 mghz FM.
(Band Plan Test Output frequency space)
Currently there is a phone patch on it with auto dial to my cell phone. Use command 4566*
to activate and # to deactivate. To hear it speak... use 4563 to receive a message. 45633
and digits 1 thru 9 to leave a message.
It will do a whole lot more, some of which is like cross band with UHF, vhf and hf.. in full duplex.
However, for the time being it is in simplex mode. Free free to play with it.
Note: I am only out putting 10 watts on a 3 element beam pointed towards the SW from Olathe, KS.
However, if you have any power at all you should be able to test it!
2. The Echo Station is the next focus as we await the coordination of the requested
6 meter frequency pair and and 440 control link freq.
(<http://www.echolink.org/sc/> is a repeater-control program for Windows).
3. We will be building a small CTCSS receiver detect for the old Motorola receiver.
Perhaps the kit found on Ebay for $25.
Has anyone out there had experience with this kit or have any better suggestions for upgrading the
old receiver to CTCSS status?
4. I think I informed you in the last update that a generous donor gave us a "Link" Receiver for the
Transmit site. It is ready to be programmed when we receive the Link Frequency coordination.
5. Last but not least; we have had two locations volunteered for the receiver site.
One in Independence would give the best elevation and about a 20 mile separation between
receiver and transmit sites.
The second.. In Raytown would be about 15 miles, but a little lower elevation.
We are still looking for more site choices. We were looking for something a bit closer.
(a minimum of 4 to 5 miles) however, these sites will work!
Remember all we need is access to 110 v AC and a dry place to set the cabinet.
We furnish the tower / pole and every thing else.
The Real Heroes of the 6 meter project!
Thanks to Larry Mofitt (WØEAA), we have a Motorola (older) receive section that
looks good and now up and running, currently crystal-ed for a 52.525 receive, a base
(110v. Motorola power supply good for a 30-watt transmitter with some schematics
for the older Motorola’s (1960-70 series).
This is a good temporary receiver start and will be used, but we are still looking for
more sensitive solid-state alternatives. If you happen to have an extra, more modern,
6 meter FM receiver (mobile or base) and are willing to donate it to the project...
the project would be much improved.
The carrier operated relay for this receiver was built and tested week of Sept 1.
We are ready for the MaxTrac 440 transmit link.
Thanks to KD0NRC, Noah, we have a MaxTrac 440 mobile (suitable for modification)
for the transmitting link from the 6 meter receive site to the 4 or 5 mile separated
transmit site. We now think we have a good source for reprogramming the 440
frequency radios to the (to be) assigned control link freq when the time comes.
We are in need of a 15 amp regulated power supply for this rig.
Thanks to a Kansas City, Ks donor, who wishes anonymous,
We now have the 440 FM band "Link receiver" equipment.
We are in the process of modifying and add a COR / control to this UHF link unit.
Once we receive the Link frequency coordination..
the receive radio will be programmed and put into service.
For this receive radio we need a 10 amp power supply of some kind.
Thanks to the good guys in Missouri (Nixa Amateur Radio Club, Inc. (K0NXA)
<http://www.nixahams.net> and <http://www.smlrs.info>), we now have an excellent
Micor 100 watt 6 meter transmitter added to the mix.
We are in need of a 20 amp regulated power supply to power the beauty.
For the controller, N
0CRD (Dan Stark ) is donating and programming a computer suitable for running Echo Station.
This is a repeater-control program for Windows which makes it easy to set up a complete,
fully-functional repeater or "announcement machine" using a personal computer.
EchoStation is perfect for portable and emergency use, or for clubs wishing to use a PC
instead of specialized hardware to control a repeater. The software even lets you set up an
"announcement machine" which plays scheduled voice announcements over your club's
existing repeater, using a radio at another location, such as a home station.
And it also allows a internet connection, telephone connection and a host of other options.
This week and the next few, in between activities, We will be building 2 ea. 5 element
440 beams for each site along with 2 ea J-Poles for the 6 meter receiver and transmit sites (all home depot stuff).
Thanks to Dave, WØDR, we now have the options on some leftover coax / hard-line for both sites.
Anyone wanting to pitch in to help in any area, is welcomed and appreciated!
We have not, to date, determined where the receive site will be, and would be open to suggestions.
A little height (roof top) and a Kansas City metro / Overland Park / Shawnee / Olathe or other location would be best.
If you know where we might have a small roof top area, equipped with 110v and a place to set a
6 meter J-Pole along with a small 440 Mghz 5 element beam.
Please give us a shout as we are currently / seriously looking! For this piece of the puzzle; the sooner the better!
Link sites should be our next focus.
Since 6 meter equipment seems to be readily available, and we are using separate transmit / receive sites..
It would be practical to set up a 2nd or 3rd receive site in say the Independence, MO, North KC or Paola areas;
linked to the central transmit site through a voting system. If any interest -- speak up!
Keeps mobile / portable power requirements down. It is a Possibility!
All in all, the project is coming together nicely! Thanks to the generosity of our community!
Application for the control frequency and 6-meter frequency pair has been applied for.
Any suggestions, comments, donations of time or equipment is always encouraged and appreciated.
Why 6 meters??? N2CKH/R puts it in perspective.... as follows:
Well for one thing, the 6m band is under utilized and it happens to be a band that I love and
would never want to loose. For another, there is an abundance of used commercial
equipment around at bargain prices, some even free for the asking.
Also, for those that are more familiar with a 2m and 440 repeater systems, you already
know that 2 meters provides better coverage than 440. Well a 6 meter repeater,
for same antenna height, gain and EIRP will yield better coverage than a 2 meter repeater.
In addition, the lower frequency range of 6 meters will allow much deeper coverage
into fringe areas. This is of special interest when one is mobile.
As was mentioned above, using 6 meters is somewhat different that 2 meters. First of all
it is at approximately one third the frequency of 2 meters. This means that the wavelength
will be 3 times as long. Most importantly, this means that a short rubber duck will work
worse on 6 meters than a similarly-sized rubber duck will work on 2 meters.
This also means that, from inside a car or vehicle, 6 meters won't work as well as
2 meters (which, if you have been on the receiving end of someone running mobile
with an in-car antenna, you know doesn't work very well, either!). So basically
we are talking outside antenna on the vehicle. Don't get me wrong, a portable,
a.k.a. HT on 6m is great, but you need a large 12 inch or long rubber duckie,
not a good length in a vehicle. The upshot of this is that 6 meters isn't really
a handy-talkie/rubber duck sort of band.
Where 6 meters really shines is its range.
Let me explain: Once you have gone through the trouble of putting up/using a
half-decent 6 meter antenna (a quarter-wave ground plane, J-pole, Ringo AR-6
or beam, for example) you'll notice that 6 meters can carry quite a bit farther
than 2 meters can for the same power level and height and gain antenna.
There are several reasons for this fact.
The most obvious reason is that there is a decrease in what is called
"apparent path loss" at the lower frequency of 6 meters, as compared with
2 meters. Given two stations - on a 6 meters and one on 2 meters -
identical stations in terms of receive sensitivity and transmit power and that
they are both using quarter-wave ground plane antennas, the 6 meter
station will have a signal that is nearly 10db (that's 10 times) stronger
than the 2 meter station. If you compare 6 meters to 70cm, the difference
is approximately 20db (that's 100 times!)
Another major reason for 6 meters carrying farther is that it propagates differently.
In many cases it can seem to get over mountains better (using various propagation
modes such as knife-edge and diffraction.) Finally, it is much less affected by
absorption of foliage than 2 meters and especially as on 70cm.
These improvements come at a price, however as 6 meter antennas are quite a
bit larger than their 2 meter counterparts. Also, 6 meter operation is also more
likely to cause TVI (Television Interference) than either 2 meters or 70 cm
(especially to channel 2.) Also, 6 meters is also more likely to be affected by
power line noise than 2 meters on receive. As you should know, power line
noise that is getting into your receiver locally is not transmitted to the other end.
Another factor that you may (or may not) consider to be a disadvantage is
that 6 meters has frequent band openings. When 6 meters is open,
it is much like 10 meters in that low power can allow you to work all over.
Openings on 6 meters are less frequent that those on 10 meters and there
are fewer people on the band. You will be amazed at the distance some
stations may be from the repeater during the April-September Sporatic-E seasons.
Yet another reason for choosing 6 meters was that since the band is under used
and has almost no LIDS on it and those that want to use such a system will
come to 6m.... just as they said in "Field of Dreams"..... build it and they will come.