# Link to SARL VHF, UHF & MICROWAVES DX TABLE Click here
IF YOU ARE STUCK WITH A VERTICAL ANTENNA THEN ADD A HORIZONTAL LOOP – Many Hams who are townhouse dwellers are often restricted to a vertical antenna on 144 MHz and limited to repeater and mobile operation. RCA has proven many years ago that horizontal VHF radio waves travel much further and with less loss over the curvature of the Earth than vertical waves. So if you could mount a small loop antenna (or 1/2 wavelength halo) at the bottom of your vertical then you could really extend the range of your 2 metre activities and make the best of both polarizations.
All the long distance ZR/ZS stations including the VHF DX are all horizontally polarized and located at the bottom end of the 144 MHz band as well as all the beacons. A small loop antenna with a diameter of about 30 centimetres and fed with a gamma match could be mounted on the side of your metal mast. Alternatively if your vertical is mounted on a length of PVC pipe above a metal mast then the loop can be located around this pipe and will look less conspicuous. Full details of VHF loop antennas are available on the Internet or Amateur Radio Handbooks. You could stack two loop antennas above each other and realize a gain of 3 dBd or 5,15 dBi in most directions on 144 MHz.
TRANSATLANTIC TESTS ON 144 MHz – Marcos Turbo, PY1MHZ, at Rio de Janeiro reports that he will be on vacation in August for 30 days and in January 30 days more. He will make Transatlantic attempts from his other QTH near the sea at locator GG98ma, and is working on a new rope ladder type long Yagi antenna. He is currently monitoring the V51VHF beacon as well as fellow Pieter V51PJ on 144,300 MHz JT65b using 2x12 LFA Yagis. Marcos is also running a beacon from his home QTH in Rio de Janeiro GG98ic: PY1ESP/b on 144,290 MHz CW and it is horizontally polarized. Keep a lookout for it.
CRAIG SMITH, ZS5AV, IS COMING BACK ON VHF SOON – Craig Smith, ZS5AV, who was a keen VHF-er disappeared off the VHF map for many years. He informed us that he is coming back and explained his absence, he says that he experienced two heart attacks, a bypass, a stroke and in April a pacemaker. His HF rigs need to go to the garage for fixing, after 20 years off the air! He is planning to make a 4 x12 LFA Yagis (G0KSC design) on 7,1 metre boom and hoping to get about 17 dBd gain from the array on 144 MHz. Bob ZS5CU gave him a QQE 0640 amplifier, which needed a bit of fixing and can run about 100 Watts. On 50 MHz he will use 2 x 6 el Yagis on a 7,2 (G0KSC type) with a gain of 12,8 dBd, but is equipped with a QQE 0640 amplifier with an output of about 90 Watts.
He was reading some old Radio ZS magazines and was thinking about 4-400 amplifier for 6 metres and has a FT-690 to drive it, and he would love to have some serious power for 2 and 6 metres. In the old days from Durban he worked Van ZS5LW in Germiston, Willie ZS2OW from Komgha, his best was Hal ZS6WB at Pretoria on 2 metres, also Bloemfontein, Welkom and Harrismith using 350 Watts on a single 13 element Yagi and no pre-amp. Craig says he has a lot to be sorted out like getting his tower and antennas up and will then make some noise. He says that all we need are more VHF stations on the air!
IS ANYONE ON 70 MHz in CAPE Town
L. Jordan ZS1LG asks the question: “I want to know if there is anybody on 4 metres in Cape Town. I was cleaning out the shack over the weekend and stumbled across a Anytone 4 metre rig."
Wouter ZS6KE: "Paul ZS1V has an APRS igate out in Somerset West. I have a Midland where I programmed the EPROM but I’m not sure it’s on the right frequencies."
Please note: A 4 metre net is still running every Monday evening on 70,200 MHz from 19:00 CAT at Port Elizabeth and they would love to work Cape Town stations.
BEACON REPORTS – Carl ZS6CBQ reported that according to Bernie ZS4TX the Bloemfontein beacon, ZS4AFV on 144,4145 MHz, is back on the air. Dick ZS6BUN heard it at KG43gm on Tuesday afternoon at 5/3 around 14:00 CAT on his 2x12 element H-pol Yagi array into a TS2000 with no LNA. At the time Willem’s ZS6WAB/b on 144,410 MHz was coming in at 5/5 with the same set-up. Ken ZS6KN heard ZS6WAB at 1/5 at KG44bj
LATE VHF NEWS FROM CAPE TOWN – “Thursday evening we had a great turn out for our 2m SSB net :ZS1K, ZS1AX, ZS1TK, ZS1CF, ZS1ROD, ZS1WWW, ZS1EZ, ZS1OPB, ZS1TAF & ZS1VDV. Last week we were not able to communicate with Charles ZS1CF in Langebaan, but this week there were 2-way reports between Charles and ZS1WWW, ZS1AX & ZS1K.
“Most stations for the sake of the Net are vertically polarized, but there are a few of us that are horizontal: ZS1TK, ZS1ROD, ZS1PDY, ZS1LS & ZS1TAF. So any stations further afield that want to try work CPT you can contact me via this forum, or The Radio Shack forum, email or our VHF WhatsApp group - 73 de Mike ZS1TAF. Cell No.076 278 5622.”
THE RISE OF MACHINES CREATED BY ARTIFICIAL INTELLIGENCE – Dr. Hugo de Garis, an Artificial Intelligence researcher, claims that Artificial Intelligence (AI) will equal the human being around 2020, and thereafter will supersede it. What once appeared only as science fiction is now beginning to manifest in intelligent robots and it is not going to end there. AI chips in the future could be a trillion times more effective than the human brain. Future robots could solve current scientific problems and make discoveries that we have not even dreamed of. Conscience and emotions could be programmed into robots, and they could reach a stage where they could replicate themselves too. The danger is that sophisticated robots of the future might regard the human race as inferior and erase them!