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Update:
14 February: We concluded a successful SARL HF Field weekend in Illovo (Villa Spa), just south of Durban, together with HARC. The setting and camaraderie was great, and good contacts were made, even though 20 & 80m were flat from there. 40m was also not as good as it was last time from Midmar. There were enough trees to string our antennas from. Pictures can be viewed here 30 January: The standby 750 repeater was removed as the tx side had gone faulty. ZU5DF also cleared the World View site of grass and weeds - thanks Shaun! 26 January: ZS5EFP is manufacturing tone boards for the older radios in our club. Please contact him or the committee if you would like one. 24 January: The Bacar launch in the Worcester Airport, Western Cape was postponed because of ATC issues 22 January: The standby repeater has been installed at World's View. Please note that it is not linked. The original repeater will be sent to Craig for repairs 20 January: "The 750 Worlds View repeater was
recovered as the intermittent squeal it suffered from, got more
prominent and regular. I will have a go at it first to try find a
dry joint as when I tapped the heat sink, the fault cleared. If I
fail, zs5cid will have a go at it.
16 January: We had
a successful MARC meeting, with 20 attendees. Honorary members
of our club were announced, and they are: Hartwig Hillermann ZS5WA, Hill Mason ZS5HL,
Milne Buchan ZS5NZ and Rod Radford ZS5RK, now ZL1RK.
16 January: Bacar 2010 is set to
launch on 24 January from the Worcester airport at 11h00. More
details can be found at http://www.amsatsa.org.za/bacar.htm 15 January: News from HARC:
Ch6, the Kensington uhf repeater is back up and running. It
overlooks the Mosas Madiba Stadium to the east and Makro Springfield to
the west. is is on 439.275/431.675MHz, encode 88.5. More can
information can be found
here 13 January: Meyer Koch ZS5MMK
became a silent key today. "Meyer had been a stanch member of our
club having served on the Committee for several years. He had not been
well for some time. Our condolences are extended to his xyl Norma
and family. R.I.P." 12 January: ZS5S reinstalled the Hilton
145.6625 repeater, which had it's deviation set correctly by ZS5CID.
Thanks Craig and Shaun! 9 January: ZR5S is organised a work
party to go to Gilboa to change the rx antenna and test the ac feed
cable. ZU5DF tested the cable with a Mega, and all is 100%. We
changed the rx X200 antenna, which was full of water again. Upon
investigation it was found that there were pin prick holes in the
top section. We are awaiting answers from the suppliers. 1 January: ZR5S and ZS5ML went to
Griffin's Hill, Estcourt, and replaced the receive antenna with a X200,
connected the correct tx antenna (phased folded dipoles), and connected
the 700 repeater with link. Click
here for
some photos.
27 December: A work party converged on Gilboa to provide moral
support for Shaun, ZR5S, who installed the new UHF repeater.
Present were the Marx family, Shaun ZU5DF, Mike ZS5ML and of course
Shaun ZR5S. It was misty, but thankfully the rain kept away.
The Shauns
and Mike then traveled to Greytown, where the repeater was modified to
prevent the repeater
from being tone activated by accident.
The
repeaters are working fine. The receive antenna at Gilboa however
is off-spec, and we suspect that the antenna contains water again.
Another work party will be needed to change the antenna. As a
result, the Underberg link battles to open the UHF link at Gilboa. More
pictures can be found
here and
here Click
here for a schematic
diagram showing the linking of the repeaters 24
December: The SARL has confirmed that ICASA has extended the grace
period to 28 February 2010 for license payments. 23
December: It looks like ICASA will only send out license renewals
in the second or third week of January (possibly later). License
payments are due on 31 December, with a grace period of 1 month.
There are negotiations underway to extend the grace period to the end of
February, but please do not bank on this happening. Please make
your payments as soon as possible, with your correct license number as
reference. The
banking details are as follows: 20
December. Midmar hf field day results: Congrats to the
HARC/MARC team! We achieved 4th place. Here are first 10
places : 8
December: Shaun, ZR5S, removed the old repeater at Hilton, and
installed the new Kenwood repeater. The deviation on the old
repeater needs to be set - it is too wide. The deviation on the
stand in repeater also seems to be too wide. Please don't use this
repeater too often so that the DARC members are not inconvenienced by
this. The repeater will be disconnected when Shaun goes past there
again. 6
December: Shaun, ZR5S, drove up to Gilboa and restored the power. 5
December: 11 members made it to the Christmas braai. Many
had other prior commitments. It is always difficult to find a date
at Christmas time convenient to most. The radio donated by Brian,
ZR5BCB, will be raffled at the next meeting, on 16 January 29
November: The SARL reports that ZU5DF and ZU5FHR, Shaun and Farhaadh,
achieved 100% in their RAE exams. Well done! 13
November: The RAE results are out! Please click
here for the full results. Well done on passing your
examinations, and please call in on air when possible - we would love to
hear you. 16 October. Shaun installed the
145.6625 repeater at Hilton - all is working very well so far 15 October. Shaun visited Gilboa, and
found all 3 circuit breakers had tripped. Our 10A 3 stage power
supply was u\s, and even though he managed to power up the uhf link
repeater, it seems to have lost its finals. He installed a temp 3A
charger 12 October. A late afternoon storm
hit us. Gilboa went off air, and the Pmb 750 repeater started
making funny sounds, and is motor-boating periodically. 10 October. Glad to report that
Gilboa is still up. Craig has been busy with repeater repairs as
per normal. The Estcourt 700 repeater is nearly finished.
The Hilton 6625 repeater is repaired, and Craig is just awaiting the
receive xtal to come in the post. We are hoping to have all these
repeaters back in position within the next two weeks. 03 October. The power at Gilboa is
still up, despite the cold and wet weather experienced. We left
the tone guard off on the 750 repeater, and only switched it back on
late on 02/10, due to excessive break through. It seems that tone
guarding is definitely necessary. Tone bursting was discussed, but
is impractical and expensive to implement at the moment, as the present
control boards in the repeaters will have to be replaced and new
software written to accommodate both CTCSS and tone bursting. We
are still awaiting quotes for CTCSS tone boards which we can retrofit
into old rigs. Craig has finished repairing the Hilton
repeater, which needed a new receiver board. The xtal for this
board should arrive within the next two weeks. This repeater can
then be reinstalled. Craig is also busy rebuilding the 700
repeater for Estcourt, and fitting a DTMF control board. 25 September. Shaun, ZR5S, and
Mike, ZS5ML went to Gilboa to make some changes. up there we found
Brian, ZR5BCB, who had switched everything back on after he replaced his
cable - rats had started eating his cable underground! So it is
possible that the rats have taken a liking to our cable as well, causing
the circuit breakers to trip. 24 September. Stanley, ZR5SEM, went
up to Gilboa to reset the tripped circuit breaker. He switched it
on at about 09h00, and the repeater switched back on at 09h09 when the
voltage was high enough. Unfortunately it tripped again at 10h29.
The battery managed to keep the repeater going until 20h09 that evening,
and then went to sleep once again. 19 September. We had a successful
meeting at the Groenekloof site, with a good turnout. A few
brought some antennas along and these were analysed with a miniVNA
analyser. Some redundant antennas were taken down, with Shaun
climbing the mast. Some photos can be viewed
here
We have 14 students doing the ZU course.
Special thank to Mike, ZS5BGV (logistics and admin), Craig ZS5CD, for
organising the tuition, and Evert, ZS5EFP, for helping and concluding
the lectures (Craig was struck down by Malaria). On behalf of the club, we
welcome our new student members, and hope to hear you on air soon.
You certainly have joined a great club and hobby! 07/09/09 ZS5S and ZS5ML proceeded
to Groenekloof, and fitted the Aircraft receiver/plotter after
organising an internet link there. We took down a uhf antenna to
make space for the new antenna. The APRS VHF IGate was also
transferred there. 10/09/09 Shaun met with ZS5JC, Jan
Coetzee, from the Hibiscus coast, at Groenekloof to discuss
alarming the room there. I then joined them at World's View, where
Shaun installed an IGate "repeater" to cover the CBD. We then
proceeded back to Groenekloof, and installed the X700 for the EQSO and
ship plotter. Two more old antennas were removed from the mast,
with the old coax. The remaining coax cables were then re-routed
and tidied up 12/09/09 ZS5ML drove up to Eshowe and met
with Willie, ZS5WI, who had looked after the two donated Polyscops.
The two heavy units were loaded into my Land Rover, together with old
copies of HHN dating back to about 1998. I then proceeded to the New Germany
Nature Reserve where I attended the Hamnet meeting where we displayed
our readiness wrt to vehicles and equipment. Not every one could
attend, but 10 fully self stainable stations were on show. Not a
bad showing! The individual stations were very impressive and
ranged from fully equipped 4x4s to fully equipped sedans, ensuring that
Hamnet here in KZN is well prepared for most eventualities wrt to
communications. All stations are self sustainable, and do not
relay on repeaters for communications, but have access to all should the
need arise, whether tone guarded or not! Some stations had their
own repeaters, which could be used where necessary as on some of our
regular yearly events. 19 September MARC held their
monthly meeting at Groenekloof. It was well attended, and the
topic was the testing of antennas using the miniVNA antenna analyser of
Shaun and Mike. For shade on this glorious day we used the awning
on Mike's Land Rover and a gazebo, in the fenced tower area.
Shaun did the hard work again by climbing the tower and removing 3 old
antennas, one of them a heavy phased uhf antenna setup. The 6m
mini loop was also lowered as it showed an open circuit on the miniVNA.
It became apparent that the matching stub had broken off. It was
resoldered using Mike's inverter and soldering iron (Eskom decided to
stay away during our meeting). The antenna was resealed with
silicone and self amalgamating tape. I climbed the tower, but ran
into an uncomfortable height, resulting in Shaun taking over again to
re-install the antenna. It was connected to the repaired beacon
(thanks, Craig, ZS5CID!) and is operational again. 20 September It was discovered that
the power had tripped again at Gilboa on Thursday, 17 September.
It could possibly have something to do with the wet cold front which
swept through there at the same time
Recent News
Gilboa, 24/08/09 - Shaun,
ZR5S, Mike, ZS5BGV, Peter, ZS5PJ and myself, ZS5ML,
braved the wet conditions and
thick mist, and proceeded into the permanent cloud layer, enshrouding Mt
Gilboa. We replaced the top X200 antenna (water-filled from a bad
joint), circuit breaker, surge protector and stays with stainless steel
stays, while boost charging the battery.
17/08/09 - The Gilboa repeater lost power
again 4 hours after it was restored. We suspect that the surge
protector might be faulty. As a result, the network will go off
air again today when the battery voltage gets too low. Due to work
commitments, this repeater can only be attended to at the earliest by
Friday, possibly even later. Volunteers are required to help with
lowering the mast so that the faulty top antenna can be changed at the
same time. Please contact Shaun if you can help
6/08/09 - The Gilboa repeater went off air,
and telemetry data showed that power was lost on 12 August, at 23h00,
the battery supplying power until 20h00 on 15/08/09. ZR5S and
ZS5ML went up to the site, and found that the circuit breaker was down.
No fault was found and the system was restored, with a boost charge for
an hour. 15/08/09 - 6 of our club
members assisted with communications for the Capital Climb race.
It was a glorious day, and the communications were a success. World's View "Antenna
straightening" On 12
January, Shaun, ZR5S, and Mike, ZS5ML, went up to World's View to
straighten the top antenna, which had swiveled through 45 degrees in the
strong winds.
Gilboa Repeater Repair #2 The uhf hub repeater at Gilboa was starting to
become a bit scratchy again, after our initial temporary repair, using
the original shortened pole which had snapped. The good thing
about this was that it ensured that the temporary repair did not become
a permanent repair... |
Some upcoming events
If you have anything of interest to post here, please email the info to zs5ml@marc.org.za Try 3D APRS tracking here. Enter the APRS station you want to follow and press "Track". Thanks ZR5S, for this link Some old photos submitted by Bob, ZS5CU can be found here If you have some old photos, please send them - I would love to display them here. If they are old paper photos, I can scan them in if necessary, as I did with Bob's photos. Class A and B
courses. Projects Page - initiated by Morris, ZS5MR PCB
design and construction course 13/14 February SARL HF Field Day The first leg of the SARL Field Day for 2010 took place at Villa Spa in Illovo on Saturday 13 February to 12h00 on Sunday 14 February. A number of members from MARC and HARC attended. Some camped and some stayed in the Bungalows.
The picture above from our veranda, showing some of the vehicles, and the one below of Ian in the back of his Land Rover
A lot of fun was had, and many contacts were made, even if the bands were not as good as on the last event at Midmar Dam APRS map of Pietermaritzburg and Hilton, with the calibration file. Click here SARL HF Field Day
Camping Weekend at Midmar Dam
Once again, we had a fantastic and successful weekend at Midmar dam, organised jointly by HARC and MARC. Three parties already pitched up on Friday night, in spite of the wet weather. Luckily the weather was dry on Saturday, and Sunday was a glorious sunny day. We had quite a few visitors on Saturday. Two radio stations were used, and consisted of an Icom 706MKIIg and an Icom IC-728, both with antenna tuners. The antennas used were a 40/80 dipole, strung high (15m) between tree trees, and a NVIS connected to Mike's Landrover (ZS5ML). Both setups were run off vehicle batteries. Band conditions were good, and well over 300 contacts were made on various bands. Craig, ZS5CD, gave an interesting talk and demo on antennas, and brought many of his projects along. A special thanks to Brian, ZR5BCB, who donated a new handheld radio to each club! It is being "raffled off" at R20 per ticket. The draw will be at the club's Christmas Braai at the clubhouse on 5 December. Should you wish to buy some tickets, please contact Mike, ZS5BGV, or come along to the Christmas braai, where you will be able to purchase a ticket or two before the draw. Peter, ZS5PJ, also donated a uhf radio to the club. This can be used as a link radio. Thanks Peter! Thanks to all who came along to make the outing a success. Hope to see you all again on the next outing - possibly for the next HF field day in March next year. More photos can be found here. The Midlands Amateur Radio Club are proud to announce another technological breakthrough facility for its followers. These are two Google Earth applications. The first link displays the local aprs and ship movements in KZN, and the second one large aircraft.
Tilt the Google map and see the
aircrafts altitude above earth. Note how fast they fly. (manipulate
the eye in the middle of the compass on the top-right of the map)
Turn up your ELEVATION EXAGGERATION from
1 to 3 in Tools, Options, 3d View
If you do not have Google Earth, download it here
The Highway Amateur
Radio Club have also been as progressive in that they have
produced a simple and effective kit to transform an EVEREADY FM
radio into an aircraft AM airband receiver. Now you can listen
to the planes you see on your Google Earth display. Get 2 or 3
to listen to the different channels.
Contact Craig
Hardman at
zs5cd@harc.org.za
for more info on these receivers.
Ham Bulletin Readers Quick-Links
The MARC Vision by Shaun Rudling, ZR5S Clubs and individuals need goals and visions to be progressive or else we stagnate. MARC has a dynamic vision and that is to stimulate “out of the box” thinking amongst its members and to be a benchmark for other clubs to follow. Imagine this, communicating with each other with light frequencies. Why not? It gets done with optic fiber with glass as a medium. Lets try it with air as a medium. In fact, hams are doing it right now using a torch parabolic reflector to add some gain to the transmitted light and using a digital camera pick-up as a receiver. Imagine the scene at night with light communications between each other. Even better would to be using laser lights. Aligning your antennas would be a cinch. Light is electromagnetic radiation just like the radio spectrum we use. Just a bit higher in frequency than what we are familiar with. This also applies to microwave, Gamma, infra red and ultra-violet radiation. Your eyes are sensitive antenna’s that receive a narrow bandwidth of this spectrum. We call it “visible light”. Really, your eyes are narrow-band, co-phased antenna’s capable of receiving electromagnetic radiation. Do your eyes have a bad SWR? Spectacles can help you align your eyeball antennas. Pause here a bit and exercise your brain before you move on. Visualize what you have just read with your antennas. Your eyes are reading this text in an analogue format. Digitize and pulse this light and with a bit of practice your brain could receive and decode digital signals. We challenge you to challenge us on these ramblings. Your thoughts and ideas will be published in the next HHN. What about upgrading our aging analogue vhf linked repeater network to a digital voice linked system. Icom have offered us a D-Star repeater that will seamlessly link repeaters to a network. Digital voice communications is how cell-phones work. We code your analogue voice into a digital format, then we modulate an analogue radio frequency with the digital data and it gets received by a repeater. The target destination receives and decodes the data and you hear a synthesized voice which should sound similar to the original source. D-star makes repeater linking easy. It allows crystal clear audio without interference. It allows a easy way to link up with other D-star repeaters around the world. Only listen to voice traffic destined for you. Send Text msgs. Send data files. See what call-sign is calling you on the display. The flexibility of this system allows for new ideas to be implemented by flashing a new firmware. Sounds expensive, doesn’t it? With a bit of effort we could have our first D-star repeater installed and working within 2 years. It will be the first one in Africa. Do not stagnate. Dream and visualize long enough and it will materialize. Amateur radio is not your granddaddy’s hobby. It is a rapidly developing science and often leads ahead of the commercial sector. Let our youth see the new technology we embrace. Explain to them how we acknowledge our forefathers achievements of the past, but always look forward for new ideas to quench our thirst for invention. Think this is far fetched? Think back to the time when SSB was introduced, and many swore that they would never embrace it.....
- every
member with an existing email address can be allocated a personalised email forwarder, where your email address
is your Also on offer is a full POP3 email address to members who do not have email addresses at the moment. You will need an internet connection however to access these, and this can be done a number of ways, like connecting to the internet using your cell phone as a modem, connecting directly with your cell phone, using internet cafes etc. Please contact the webmaster directly if you are interested and/or need more information (contact details are found in the "contact" link at the top of the page) New APRS maps New APRS maps of Namibia and Botswana have been uploaded to our map download section. They have been calibrated, and the calibration files are included in the compressed files. The new 40m band plan (as reported on the SARL website) South African Radio Amateur now have full access to the 40 meter band. The Government Gazette has amended annexure G of the radio Regulations as follows: The Amateur Radio allocation of the 40
metre band is now ZR Licensees may now use more of the 20 metre band. The new allocations is 14 225 - 14 350 kHz. The new 40 metre band plan is as follows
The
Amateur's Code 1. The Amateur is always
Considerate... 2. The Amateur is
Loyal... 3. The Amateur is
Progressive... 4. The Amateur is
Friendly... 5. The Amateur is
Balanced... 6. The Amateur is
Patriotic... Views expressed on this website do not necessarily echo those of MARC's members, in general
At MARC we are always looking for a new challenge, whether it's looking for new repeater sites to increase our footprint, helping new/old hams set up their hardware/software or simply finding a way to get away from work/family to spend some time with friends with the same technical interest! On this site you will find links related to MARC and sister amateur radio clubs. Please feel free to browse around and be sure to come back for regular updates. Remember to click your "Refresh" button periodically. This clubs members are mainly located in the Kwa-Zulu Natal Midlands on the east coast of South Africa. |
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rights reserved.
Last Modified:
10/03/2010 13:47