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  • OH8GAD's Avatar
    Today, 16:00
    I wouldn't think a PC component could affect the tuning of an aerial. It could create RFI/noise, yes, but affect the tuning/VSWR, I really doubt it.
    1 replies | 1 view(s)
  • kj5yn's Avatar
    Today, 15:32
    This is an odd question and it puzzles me. I have a Kenwood TS-2000, MFJ Tuner 969 and using a folded dipole. Until recently, no matter how hard I tried I couldn't get the tuner to tune to an acceptable SWR. The only thing that has changed is that I installed an ASUS video card in my Dell OPtiplex 760 so I could connect DVI to my monitor (digital) instead of VGA (analog). Is it possible that the VGA connection in my PC somehow interfered with tuning 5mHz?
    1 replies | 1 view(s)
  • pmh's Avatar
    Today, 14:20
    On a positive you can re-enter the old password, and save. There is no need to actually change it. Kind regards, Phil
    1 replies | 87 view(s)
  • paulears's Avatar
    Today, 08:46
    paulears replied to a thread Antennas in Antennas
    There are loads of versions of the same antenna, and my deep suspicion is that most are made in the same factory, or by somebody just copying them. In general - they are a tiny bit better on the design frequency and worse on anything else - worse than the one that comes with the radio in fact. So if you like the marine band, the chances are the better antenna is worse! Here is what I found. https://youtu.be/LVzlFTIMV5A
    1 replies | 100 view(s)
  • paulears's Avatar
    Today, 08:42
    Why is there a need on a forum to insist people change their passwords? I don't use my banking password on a forum, just a more memorable one, and I have too change mine because it's 370 days old, wow! My credit card one is ten YEARS old and still is, by their description VERY strong. On top - the forum remembers old passwords and will not let me go back to the previous one. For essential internet access, passwords are important - but we're a chat forum, the forum, know very little about their members and loads of people have anonymous usernames and no personal information. What secrets could be of use to anyone else. Just seems a bit OTT, and worse, my iPad could not change it - the passwords didn't match, on the MacBook, the passwords were happily accepted?
    1 replies | 87 view(s)
  • Joevano's Avatar
    Yesterday, 23:17
    Hopefully putting up my first antennas next weekend and looking for a tilt base like the Gap Tilting Base or the Hy-Gain ATB-75. Planning on using 16-20 feet of mast which will be secured to my fascia at about 10í. On top Iím mounting a J-pole, and a discone for now. What do you recommend for the base?
    0 replies | 87 view(s)
  • xdm's Avatar
    Yesterday, 19:14
    xdm started a thread Antennas in Antennas
    So yesterday on the 18th of august I took my Technician Exam. I passed happily. I now want to purchase a new antenna for my baofeng UV-5R2+. I currently have the stock rubber duck antenna which I know is not the greatest. I'm on amazon right now looking at Nagoya antennas. https://www.amazon.com/Authentic-NA-771-15-6-Inch-SMA-Female-BTECH/dp/B00KBZLOHC/ref=pd_sbs_107_2?_encoding=UTF8&pd_rd_i=B00KC4PWQQ&pd_rd_r=GCR93WS47GC4W78MBBCW&pd_rd_w=UDRmN&pd_rd_wg=hzU7Y&refRID=GCR93WS47GC4W78MBBCW&th=1 I'm looking for an antenna around the 8 inch mark. I don't mind the longer antennas but for the moment I'm looking for something a bit mobile. I see two Nagoya 701s listed on amazon. One is NA-701 amateur and the other is NA-701C Commercial. What is the difference? If you also recommend anything better or different even longer over my choice. Please feel free to encourage me what the best option is.
    1 replies | 100 view(s)
  • camerart's Avatar
    Yesterday, 10:54
    Hi, I changed the 9pF cap for a 10pF, and the result is the same SWR 4 C.
    19 replies | 333 view(s)
  • pmh's Avatar
    Yesterday, 10:47
    pmh replied to a thread Balun in metal box in Antennas
    As baluns are wound on a core, any nearby metal object will have an effect; exactly to what extent I can’t say. All the baluns I have wound are in plastic outdoor electrical enclosures. All the commercial ones ai have seen are also in plastic enclosures. Kind regards, Phil
    1 replies | 117 view(s)
  • OH8GAD's Avatar
    Yesterday, 09:15
    Many years ago, I used a Slim-JIM (a bent over J-pole). It was made from solid aluminium rod, but later I learned that the width of it was too narrow. I always had a SWR between 1,3 and 1,5 with it. I originally had it in our attic, but reception was pretty poor. The roof was made from clay roof tiles, with some sort of bitumen matting underneath for water proofing. I moved the aerial out onto a pole mounted on the side of the wall - the top of the aerial was still below the top of the roof, but the performance was dramatically improved, I was getting simplex contacts around the 50 to 75 km mark, and occasionally out to 100 km. I could consistently get into the North Kent repeater, which was about 80 km south from me. Later I got a longer pole, so the top half of the aerial was above the roof top, I got even better range. With VHF & UHF, height is paramount.
    3 replies | 135 view(s)
  • KD3WB's Avatar
    Yesterday, 01:04
    If it's the Astatic PDC1, the second page of the manual says it only supports power level measurements below 148 MHz. https://www.bobscb.com/PDGManuals/AST-PDC1.pdf Local ground wave signals are heavily affected by terrain. It sounds like your rig and antenna are doing just fine. Ben
    3 replies | 135 view(s)
  • BJS's Avatar
    Sat 18th Aug 2018, 21:49
    BJS started a thread Balun in metal box in Antennas
    A metal box verses a plastic box. Does the balun care? If metal, any concern if the balun and/or wire is mounted solid against a metal wall? If so, amount of spacing?
    1 replies | 117 view(s)
  • BJS's Avatar
    Sat 18th Aug 2018, 20:04
    BJS started a thread Short Vert. Dipole in Antennas
    I know this has been beaten to death, however I am looking for some gut feel and help. Recently moved and starting over with ant. Want something very simple yet reasonable signals. Because of location and neighbors, at this time no long wires or high obvious "ham antenna". ---- Thinking about a 20 m dipole, mounted vertical to an all wood and composite shop type building. It has a cement floor, so a normal vertical ant. with radials is questionable as they could only fan out 180 degrees. The building is 13 feet where I am thinking about a support. I would build the ant. out of aluminum tubing so it could be mounted extending above the roof-line several feet. Prefer not to have any guy lines. Would put a balun (1:1) in the center and then what? Would it work to put a small loading coil on each side of the balun, therefore allowing the actual elements to be shortened down to about ten or twelve feet each, thus keeping the overall height to maybe 20 to 24 feet? How close to the ground could...
    0 replies | 102 view(s)
  • NCLivingBrit's Avatar
    Sat 18th Aug 2018, 18:02
    I'm stunningly new to this, but got several BF888s and a UV5Ra the other day and I had tons of issues programming them..... until I got an FTDI chipset cable. I did buy one of the knockoff Prolific 3.2.0.0 cables and it was absolute trash, even with the backdated drivers to deal with the bootleg chipset clone. I ordered the FTDI cable ($20 compared to the $5 knockoff Prolific) and it works easy as falling off a pie. One good piece of advice that Chirp gave me was to make sure the volume is maxxed out when reading or writing to the radio. Also Chirp was tons easier than the awful Boafeng software. Hope it all works out for you!
    4 replies | 1200 view(s)
  • Richierich's Avatar
    Sat 18th Aug 2018, 17:48
    I made contact on 2 meter band to a station about 8 miles away. His signal was strong and my contact was good. However I could bearly hear his contacts only 6 or so more miles futher away. Where I put my antenna in the attic there is a pipe about 2 feet away going vertical. It is 2" vent pipe and is not grounded because it converts to PVC at the attic floor level. Could this be hindering my antenna? I also see a couple of wires that go vertical 2 feet away for a weahter station.
    3 replies | 135 view(s)
  • camerart's Avatar
    Sat 18th Aug 2018, 13:55
    Hi P, I have looked at it through lens and there is something there, which could be another digit, and would make more sense as 9pF is pretty small. The missing digit, is not inline with the K as with all of the other caps. Just found an image with one coil and a 7pF cap, so perhaps it is correct. Let's change it and see what happens. C.
    19 replies | 333 view(s)
  • DenPem's Avatar
    Sat 18th Aug 2018, 13:03
    DenPem started a thread Interference in Activity Forum
    HI, I think I know the answer to this question but I need to ask it. I have 2 radio, 3 antennas a mixer, 4 monitor speakers (active) a compressor and 2 computers. My office/shack is small, 11' x 8', the 2 vertical antennas are just above the office window, the GR5V is about 50 ft away in the garden. When I key up on either radio the speakers go mad with noise and the computer screens jump about, I am using 10 to 100w, is this a common problem? As you can see from the above image things are on top of each other, just to the left is a PC and to the right Is a mac. Any ideas?
    0 replies | 83 view(s)
  • pmh's Avatar
    Sat 18th Aug 2018, 12:22
    pmh replied to a thread Tuning Diamond V-2000 Antenna in Antennas
    I don’t think that is 9j, there appears to be another digit first, though it is hard to see. Kind regards, Phil
    19 replies | 333 view(s)
  • camerart's Avatar
    Sat 18th Aug 2018, 11:06
    Hi P, All snippets of information can be helpful, thanks. In the image at #15 the NPO 9J cap which I assume to be 9pF is reading 57pF. Actually 9pF is a very small capacitance, and suspect, I'm going to change it and see what happens. C.
    19 replies | 333 view(s)
  • pmh's Avatar
    Sat 18th Aug 2018, 09:32
    pmh replied to a thread Tuning Diamond V-2000 Antenna in Antennas
    The manual being American makes no difference to general assembly. The original pictures you posted are of little value to assist. The adjustable radial is, indeed, for the 6m band. If you used a capacitance meter to check the capacitors, then you should get a reasonable reading, though the exact value will be affected if components are tested in circuit. You could drop one showing open circuit and test it as an isolated component. I doubt all capacitors will have gone - you could always try changing them as a precaution if you are still unsure they are ok. My X50 is on the apex of the house, clearing the roof by 3/4 of a metre max, and performs perfectly.
    19 replies | 333 view(s)
  • camerart's Avatar
    Sat 18th Aug 2018, 08:27
    Hi, I checked the capacitors, 1x between the connection point and 5x at the base and they all showed open circuit. I checked my chinese capacitor tester with a known cap and it read ok, but it does seem suspicious. Here's a photo of the base Cap and values. C
    19 replies | 333 view(s)
  • BJS's Avatar
    Fri 17th Aug 2018, 22:52
    BJS started a thread Vert. radial, sort of in Antennas
    Tried to delete this
    0 replies | 61 view(s)
  • GEOFF3's Avatar
    Fri 17th Aug 2018, 21:57
    I would like to thank everyone for their kind advice. A lot of things have changed in the amateur radio world but not, I'm pleased to say, the friendliness and the willingness to assist those who ask even the most basic of questions. I think I will look to build a basic 2m/70cm base station and chat around just to get the feel of things and look into expanding into other bands as I feel and get more confident in what will be involved. I'm pretty sure I will not be able to reach any of the repeaters from my home in the Scottish Highlands, (it really is quite remote and I'm surrounded by hills and mountains), or how active 2m / 70cm is around here. Still, I wont know until I try. Again, thanks for your help and support. Geoff G6VRU
    7 replies | 186 view(s)
  • pmh's Avatar
    Fri 17th Aug 2018, 16:24
    pmh replied to a thread Base Radios FT450d built in ATU...how good. in Amateur Radios
    Dear. I know, Keep trying, and on different bands. When conditions drop I turn to digital modes, such as FT8. Recently, when band conditions were reported as very poor, I still managed Indonesia, Oman, India, and regularly hit America and Canada, so you might want to consider this as a bit of a fall back. Kind regards,
    5 replies | 658 view(s)
  • pmh's Avatar
    Fri 17th Aug 2018, 16:18
    pmh replied to a thread New Old Ham G6VRU in Introduce yourself
    Hello Geoff, And welcome back. There is nothing wrong with the cheap Chinese radios, they fill a spot, and are easily programmable via a free to download program called Chirp. I have two, which get used regularly. A very well made, and capable, handheld radio is the Yaesu FT-60E, which can be picked up second hand for around £70. Mine was mint and, again, is used quite often. A big advantage over the Chinese radios is that this has a proper S Meter. You are correct, they are aerials, and not antenna, originating from the Latin.
    7 replies | 186 view(s)
  • Richierich's Avatar
    Fri 17th Aug 2018, 13:23
    My first Radio is a Icom 2730a dual band. I am using it as a base station. I bought a power supply which puts out 13.7 vdc. I made a copper J pole antenna.Made to specs as per many posts on internet. I put this in my attic in a pvc pipe stand. Ran coax 50' to radio. Did not ground antenna. I bought a Astatic pcb1 meter and a 3' coax. I connect that to radio and antenna lead near radio. I set the swr meter and it reads 1.3. However when I put meter on power to test watts it flys to max either on 10 or 100 watt settings. I have my Icom set at low power output. Astatic says if this happens there may be something wrong with antenna system. NOTE I have been able to contact anyone with this radio so far. Also I scan and hardly hear many transmissions. But I heard some hundreds of miles away, I guess on repeaters. I am located on Long Island NY.
    3 replies | 135 view(s)
  • Nickjaxe's Avatar
    Fri 17th Aug 2018, 08:51
    Nickjaxe replied to a thread Base Radios FT450d built in ATU...how good. in Amateur Radios
    Hi guys...got my 450D a month or so ago when I retired from work and had the time to dedicate to it. Been a SWL since I was a kid so had some understanding...but the way the sunspot cycle is right now I picked a bum time to buy. But we have what we have....I can only work 40m as I only have an antenna for 40...a half wave dipole at present and am more than happy with that...finding 40m very interesting. It as interesting as I thought I would....vhf/uhf just did not float my boat...seems very cb like...sorry guys. Up to now I have worked quite a few stns around the 1500ml range but would like to work into the USA...
    5 replies | 658 view(s)
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