Activity Stream

Filter
Sort By Time Show
Recent Recent Popular Popular Anytime Anytime Last 24 Hours Last 24 Hours Last 7 Days Last 7 Days Last 30 Days Last 30 Days All All Photos Photos Forum Forums
  • KevinJones's Avatar
    Today, 17:02
    I am turning to the ham community as I have not been able to find answers anywhere else. I am interested in making a dipole antenna with a gain higher than what the nominal 1/2 wave dipole achieves. I hope to achieve around 9db gain omnidirectional in the horizontal plane (maybe more). This is for the 2.4 GHz band used on wifi equipment. I have tried to do a lot of research on the web, but am still finding I have specific questions which are not being answered. I am familiar with the fact that 6db and 9db direct screw-on antennas are sold for 2.4GHz wifi equipment. The ones I have seen have been called dipoles. The closest thing I have come to which addresses somewhat in detail is a Youtube video (https://www.youtube.com/watch?v=bs8hvXGJdhM&t=94s) where the presenter dissects one such antenna. I have included screen shots which show the dimensions of element. Note that in the author's notation regarding the length of the coil, the 70mm refers to the length of the wire section before coiling. ...
    0 replies | 0 view(s)
  • camerart's Avatar
    Today, 12:13
    Hi, I've found a page that shows that Zadig causes problems, and instructions on how to reverse the problem, which changed some aspects, so now the Funcube shows as each SDR is started, but still not quite connecting. C
    3 replies | 78 view(s)
  • KD9KVS's Avatar
    Yesterday, 19:18
    I was looking at the buddipole/buddistick setup, thinking this is great. I saw the price and said thanks but no thanks. Here are some links to build your own without the sticker-shock. Something fun and useful, for not much money. https://docs.google.com/viewer?a=v&pid=sites&srcid=ZGVmYXVsdGRvbWFpbnx3M2ZmaG9tZXBhZ2V8Z3g6MWMzZjExODFhZTAzNzVjMw https://docs.google.com/viewer?a=v&pid=sites&srcid=ZGVmYXVsdGRvbWFpbnx3M2ZmaG9tZXBhZ2V8Z3g6MWMzZjExODFhZTAzNzVjMw Whip from buddipole.. http://www.buddipole.com/lotewh.html
    0 replies | 93 view(s)
  • camerart's Avatar
    Yesterday, 13:24
    Hi, I've tried this, and at anytime the dongle is plugged in, then it shows in 'Audio inputs and outputs' and 'sound, video and game controllers' I've tried disabling and enabling, deleting and installing a new driver, plus deleting then using Zadig. Thanks, C.
    3 replies | 78 view(s)
  • 5B4AJB's Avatar
    Yesterday, 13:08
    Try opening your device manager with the dongle plugged in & click remove device. Unplug it and plug it back in...
    3 replies | 78 view(s)
  • camerart's Avatar
    Yesterday, 10:25
    Hi, I have two Windows 10 computers. My Funcube works on one and not the other. I've: tried a 'system file check' cleared Funcube from REGEDIT reinstalled SDR programs. Re-loaded the Funcube DLL from the website. The Funcube shows as LINE IN In all SDR cases Funcube is not showing, in one case there is no 'souncard' box where there is on the second computer.
    3 replies | 78 view(s)
  • K7KBN's Avatar
    Thu 13th Jun 2019, 01:09
    Experiment and study what works and what doesn't. You'll need some test equipment and plenty of writing stuff for recording dimensions, frequencies and such. In general, a multiband mobile antenna doesn't really lend itself to fixed station (not "base station") operation. YMMV.
    2 replies | 114 view(s)
  • Psi*'s Avatar
    Wed 12th Jun 2019, 21:48
    Define what you consider effective? For me, the answer is that using antennas with design would be an exceptionally poor match. Meaning very little power delivered to the antenna and not effective at all.
    2 replies | 114 view(s)
  • Je Brown's Avatar
    Wed 12th Jun 2019, 13:38
    I have an old Transel TAB5T multiband mobile antenna. I have used this on my van in years past, and it worked fine. If used as a base station antenna, a monoband vertical should have a radial system. But what about the TAB5T used as a base station antenna? Does the addition of 4 different band resonators (3 at right angles to the mast, and 1 vertically at the top) make it, in effect, ground independent? Not to say that a radial system would hurt, but are radials necessary or effective as in a monoband?
    2 replies | 114 view(s)
  • jimisbell's Avatar
    Tue 11th Jun 2019, 23:31
    He is a SK. Dont know if he is on the air or where...........I think it wasnt what I thought it was. I havent put it together yet but from the few poor pictures I have it may be the internal CoAx that is inside the driven element and will be covered up when I put the extensions on. May be normal part of the drive matching transformer. I hadnt looked closely enough at it since I picked it up last night.
    2 replies | 134 view(s)
  • 5B4AJB's Avatar
    Tue 11th Jun 2019, 17:37
    5B4AJB replied to a thread Introduction in Introduce yourself
    Welcome from 5B4 land!
    1 replies | 70 view(s)
  • Edward52316's Avatar
    Tue 11th Jun 2019, 17:30
    Hi My name is Edward KG5QLA my QTH is in Houston TX. EL 29kn
    1 replies | 70 view(s)
  • Psi*'s Avatar
    Tue 11th Jun 2019, 16:12
    Eventually you will need a balun to get to the coaxial input of your transceiver. Many commercial baluns have a ground terminal that provides a DC connection to both sides of the dipole. And that drains off static accumulaton from any of several natural sources ... nearby lightning storms, snow, etc. So ... ladder line provids a quieter antenna that coax fed. Call it anecdotal evidence, but for me disconnecting/reconnecting the balun ground lug made a noticable difference in QRN on my rcvrs.
    2 replies | 96 view(s)
  • 5B4AJB's Avatar
    Tue 11th Jun 2019, 13:02
    As with a lot of Amateur Radio, suck it and see, experiment, your mileage may vary...
    1 replies | 62 view(s)
  • 5B4AJB's Avatar
    Tue 11th Jun 2019, 13:00
    You should be good to go with open feeder on 40. The losses are far less at low frequencies, so, provided you have a good fundamental resonance, you should have less noise...
    2 replies | 96 view(s)
  • timemeddler's Avatar
    Tue 11th Jun 2019, 10:03
    Hello, been putting together a 40 meter dipole with a tuner for other bands, inverted v planned for final setup. I am debating the merits of ladder line vs coax. I know there's no point to using a tuner on coax other than saving the transceiver. however I live in an urban area where RF noise is a concern, is there any appreciable difference between shielded coax and open ladder line? The run will be about 100 feet.
    2 replies | 96 view(s)
  • Advisesoonest's Avatar
    Tue 11th Jun 2019, 06:46
    Advisesoonest replied to a thread Chameleon Antenna in Antennas
    Thank you Sir, I figured i needed a spectacular radial system or get it up into the air! I assume you need a short mast to mount the telescoping pole to? Mount the Chameleon to the tescoping pole, get it up into the air, then mount the telescoping pole to the mast This is not exactly stealth but feasible!
    9 replies | 224 view(s)
  • K7KBN's Avatar
    Tue 11th Jun 2019, 06:00
    That's one that should be answered by the previous owner(s).
    2 replies | 134 view(s)
  • Advisesoonest's Avatar
    Tue 11th Jun 2019, 04:30
    Advisesoonest replied to a thread Chameleon Antenna in Antennas
    Thank you so much I figured either I needed a great radial ststem or get it up off the ground. I assume the improvement was significant?
    9 replies | 224 view(s)
  • jimisbell's Avatar
    Tue 11th Jun 2019, 01:47
    I just aquired a Mosley CL-33 tri band antenna. I will be refurbishing it before putting it on an 80 foot tower. The parts dont look exactly like the assembly pictures. One of the elements does NOT have solid aluminum stubs on the loading coils. Instead it has what looks like RG8 pigtails. Why?
    2 replies | 134 view(s)
  • K6CPO's Avatar
    Mon 10th Jun 2019, 20:31
    Since the qualification question was added to the application form. I have had several people come through with positive answers. As far as I know, most of them have had their licenses granted within several months. I don't know what the OP's offense was, but I seriously think that if the FCC hasn't granted the license after almost two years, it isn't going to grant one at all. It's time to stop agonizing over this and move on.
    49 replies | 5031 view(s)
  • cake's Avatar
    Mon 10th Jun 2019, 18:49
    I plan to buy a signal booster for a phone (60db gain for car/rv, wideband) and attach a yagi type antenna. According to the plot form the manufacture (link) https://ibb.co/Mgf9cRB does this mean I have a range of about 30 degrees each way when aiming it? I only ask because I am wondering how accurate I need to be when I aim that style of Antenna. I know this is shortwave/ham forum, I figure you guys would know. My whole situation that I am trying to solve is Internet on a cargo ship. I have 2 windows for my room (port and aft) and the walls are steel. I was thinking to put a "Proxicast 11 dBi Yagi" behind a window and just aim it at land providing I have 60 degrees of arch. The ship is always moving, so I would guess I would just need to adjust it once in a while.?
    1 replies | 62 view(s)
  • KJ7EVA's Avatar
    Mon 10th Jun 2019, 16:51
    KJ7EVA started a thread Base Radios DJ-500T in Alinco
    As a recent baby tech I have been gifted an Alinco DJ-500t. I have tired running it through an ftdi chip (2 actually to double check it wasn't the chip). I have tried every possible wire combination that I could think of. Nothing seems to be working right. It won't load the radio in the Alinco program. I'm stuck trying to program it by hand for now. Does any body have (dumb, baby tech proof) instructions for how to program this radio? Everything I have found online is saying to plug it in and that's it. Maybe an actual writing diagram for the plug to the ftdi chip and whether or not the radio needs to be in clone mode or not? Any help is appreciated! Sent from my SM-N960U using Tapatalk
    0 replies | 63 view(s)
  • jimisbell's Avatar
    Mon 10th Jun 2019, 13:32
    I guess I am just one of those people that always sets the parking brake before I get out of the car. 82 years has taught me not to assume ANYTHING.
    49 replies | 5031 view(s)
  • Obed's Avatar
    Mon 10th Jun 2019, 12:30
    it is not like he is the only one to ever buy a radio before his license came in. I know several people who bought gear before they ever took the test. Most folks have some minimal confidence in their abilities.
    49 replies | 5031 view(s)
  • selectcase's Avatar
    Mon 10th Jun 2019, 11:20
    Many thanks for the welcome...I may well be asking for advise on power supplies etc in the near future.currently swatting up on the differant frequencies etc its very interesting Sent from my SM-A520F using Tapatalk
    3 replies | 83 view(s)
  • AndyG0CCX's Avatar
    Mon 10th Jun 2019, 08:28
    Welcome to the hobby! Having something that you can't use can be great motivation. When I got my Class B Licence in 1984, I was doing my HF listening on a Yaesu FRG7700 receiver. I traded it in against a Yaesu FT101ZD transceiver, and gave the mike and rear jumper plug (that stopped it transmitting) to a local friend who had a Class A Licence for safe keeping. So I could listen but not transmit and looking at the radio every time I walked past it (the shack was in between the lounge and the kitchen) and knowing that I couldn't use it fully frustrated the heck out of me! I really enjoyed VHF for a few months, and actually operating on air, building antennas and shack equipment (rather than just taking the exam) taught me a heck of a lot, but I very soon got started on the CW to get the full Class A Licence. So I'd unbox it and make it stare at you! :)
    3 replies | 83 view(s)
  • 2E0FVL's Avatar
    Mon 10th Jun 2019, 07:51
    Welcome to the Forum and the world of amateur radio. :encouragement:
    3 replies | 83 view(s)
More Activity