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  • K7KBN's Avatar
    Today, 01:05
    I wouldn't worry about it on 40 meters. Folding back the ends of a too-long dipole hurts very little on HF if the "fold" is less than 1/4 wavelength in radius. Experiment! Learn by doing - that's what Marconi did!
    3 replies | 91 view(s)
  • brandon lind's Avatar
    Yesterday, 17:32
    Since the majority of the radiation comes from near the feed point, letting the ends hang down (perpendicular to the antenna) should not be too much of an issue. Make sure the antenna ends are out of reach of people as the voltage on the tips can be quite high depending on your power level. Try to place the bends symmetrically. Another option would be adding loading coils to each side of the dipole and trimming the wires shorter. The purpose of loading coils in series with each element is to cancel the capacitance caused by having the elements physically too short. Some people attach the loading coils directly to the feed point, but I prefer to have them further down the dipole to increase the current in the antenna before the coil. Regarding bending the ends back on themselves... My first thought is no. Although bending the ends back on themselves should be the same as adding an inductor to the end of a shortened wire, I don't think it will be easy. In theory, the net result would be a hairpin under...
    3 replies | 91 view(s)
  • OH8GAD's Avatar
    Yesterday, 16:47
    What happens if you fold the ends of a dipole?: https://www.qsl.net/kk4obi/Center-fed%20Folded-end%20Horizontal.html
    3 replies | 91 view(s)
  • Okmike's Avatar
    Yesterday, 16:30
    Iím in Henryetta, testing in the morning in BA. Iíll try and catch a meeting soon. Mike Sent from my iPhone using Tapatalk
    2 replies | 2327 view(s)
  • VK4CCV's Avatar
    Thu 21st Feb 2019, 23:26
    Good Morning All, I have a Dipole up at the moment which is too long by about 3 meters on each side. The desired centre frequency is to be 7.150. To shorten the antenna, can I just fold back each leg on itself by 3 meters to achieve a physical shorter antenna, or will it still be seen as a longer wire?? Pete VK4CCV
    3 replies | 91 view(s)
  • K6CPO's Avatar
    Thu 21st Feb 2019, 23:05
    K6CPO replied to a thread HAM Licence Plates in The Junk Box
    The call sign plates should go with you, not the car. They do in California, but it's best to check the laws of the state where the car is registered.
    2 replies | 87 view(s)
  • K6CPO's Avatar
    Thu 21st Feb 2019, 23:00
    Again, "You get what you pay for." My experiences with the Yaesu software have been sketchy at best. RT Systems is the only way to go.
    4 replies | 157 view(s)
  • brandon lind's Avatar
    Thu 21st Feb 2019, 21:49
    I have the RigExpert AA-170 and love it. I have no trouble seeing my screen outside, but I have the non-colored screen. Not sure if that matters. I noticed on the SteppIR website that the SARK-110 uses an MCX connector with an included SMA adapter. I do not know how much that little connector can handle in terms of adapters and coax hanging off the analyzer if you need to go to a PL-259... Id be a bit afraid to connect my LMR-400 to such a little port while holding the analyzer! If the Spec charts on the SteppIR website are truthful, their device has about 0.2 ohm deviation across the 3 to 144 MHz span. My RigExpert has about 1 ohm deviation across the same span, but... mine has not been calibrated since I swapped the SO-239 with an N-Type connector and I don't think my dummy load was intended for VHF. I really like my RigExpert!
    1 replies | 54 view(s)
  • Obed's Avatar
    Thu 21st Feb 2019, 12:07
    Obed replied to a thread HF newby in Introduce yourself
    welcome to the forum...one nice thing about this hobby is the many areas to play in. Do what you enjoy. I am almost exclusively an HF operator, I have the VHF/UHF gear, just seldom use it.
    1 replies | 111 view(s)
  • Ricardoo's Avatar
    Thu 21st Feb 2019, 07:14
    I am thinking of getting a Rig Expert 230. But recently came across the Steppir SARK-110 analyzer. Does anyone know about it? I have seen a couple Youtube videos, but that is all. One critical remrak is that it can be hard to see the screen in bright light. Is that a problem with Rig Expert analyzers ? Thanks - KG6ABH
    1 replies | 54 view(s)
  • Ricardoo's Avatar
    Thu 21st Feb 2019, 07:06
    I just discovered the Steppir SARK-110 analyzer. It looks very promising, and a little less expensive than the Rig Expert. You tube videos show it has a lot of features. The only reported downside is that the screen can be hard to see in bright sun. Please post what you think about it. Ricardo - KG6ABH
    3 replies | 1408 view(s)
  • Ricardoo's Avatar
    Thu 21st Feb 2019, 06:48
    Ricardoo started a thread HF newby in Introduce yourself
    Good evening all, Ricardo here - KG6ABH in Nevada City California I am a retired civil engineer. I was a no code tech for about 15 years, not active. Almost a year ago I upgraded to General, and just upgraded to Extra last Saturday. Just bought my first HF rig - an Elecraft KX3; and am now pursuing all the ancillary stuff. I am thinking my interests will be SOTA and portable for camping trips. Sooo much to learn ! Guess you never stop learning with amature radio.
    1 replies | 111 view(s)
  • K7KBN's Avatar
    Thu 21st Feb 2019, 06:43
    K7KBN replied to a thread HAM Licence Plates in The Junk Box
    Here in WA, the ham license plate goes with the ham, not the vehicle. You're in Iowa, so YMMV. Whenever I've changed vehicles I let the seller know that I keep the plate and to please install it in place of the dealer plate. Never a problem. Sorry about your loss. We here in western WA just came through the snowiest February snowfall most of us could remember. Had a foot of it on the lawn - but I drive a Subaru. And it has snow tires. Studded ones. Even with that going for me, I didn't venture out until well after the worst was over. Born and raised in Las Vegas NV. It snows there about every 4 or 5 years. It sounds like you're wondering if there's some involvement by the FCC in the case of a ham plate. No. They issue the radio license. The State of Iowa issues vehicle licenses, and I'm pretty sure this isn't the first time something like this has happened. There might be a fee for transferring the plate to another vehicle, but that should be about it.
    2 replies | 87 view(s)
  • Jon Hudson's Avatar
    Wed 20th Feb 2019, 16:42
    The SDRplay downloadable SD card image for the Raspberry Pi3 is proving very popular both for introducing radio to RPi users, and enabling existing radio enthusiasts to have a lot of fun. The latest release includes RSP TCP Server software which opens up more ways of using an RSP remotely - you just need a Raspberry Pi, an RSP and an internet connection to allow most RTL-SDR compatible software to access the radio. Here then, is what comes pre-installed in the downloaded SD card image: The RPi3 operating system (you don’t need to mess with your current software set-up) Cubic SDR (complete SDR receiver software) GNU Radio Companion GQRX ADSB (Dump1090) QT-DAB receiver
    0 replies | 58 view(s)
  • KE0JZY's Avatar
    Wed 20th Feb 2019, 13:25
    KE0JZY started a thread HAM Licence Plates in The Junk Box
    Hi all, I'm new to the forum, but I've had a call sign for a couple of years now. I'm in kind of an odd situation and thought I'd check in here to see if anyone has ever been through the same thing. Last Tuesday (2/12/19) I was hit by an oncoming driver on my way home from bowling. The road conditions were far less than prime and there was simply nothing I could do except try to mitigate the damage as best as possible. Unfortunately, my car was officially declared totaled on Friday (2/15). I'm completely fine, BTW. The oddity of this comes in with my plates since I've got Amateur Radio plates. I know under normal circumstances that I'm supposed to relinquish the plates after a total loss accident. However, I'm realizing now that these don't qualify as standard or even standard vanity plates and that I'm the only person qualified to apply for and hold the plates with my call sign. So, has anyone been through this before? Do I turn in the plates and reapply for them on my next car? Can...
    2 replies | 87 view(s)
  • DougT's Avatar
    Wed 20th Feb 2019, 02:08
    The ft-70 is a better built unit, has fusion, and a 3 year warranty. I could never get the supplied yaesu programming software/cable to work on windows 10, and bought the rt Systems software/cable.
    3 replies | 584 view(s)
  • DougT's Avatar
    Wed 20th Feb 2019, 02:03
    I have spent several hours trying to get the supplied software/cable to work on windows 10. I have followed the multiple you tube instructions. Nothing works. Chirp does not work. So I gave in and purchased the rt Systems software/cable.
    4 replies | 157 view(s)
  • kc1dgg's Avatar
    Wed 20th Feb 2019, 00:37
    Sounds less distorted but still tinny with external speaker.
    2 replies | 109 view(s)
  • 5B4AJB's Avatar
    Tue 19th Feb 2019, 16:08
    Open it and change the speaker? Have you tried an external speaker?
    2 replies | 109 view(s)
  • kc1dgg's Avatar
    Tue 19th Feb 2019, 00:45
    Pulled my 2000h out of the jeep and brought it in the house for a base station. Hasn't been used in some time and when I checked into the net tonight the audio was very tinny with a noticeable amount of distortion. I don't remember it sounding so bad and my HT was much easier to understand. SOunds like when you turn the volume up to loud and it gets distorted but it makes it even at low volume.
    2 replies | 109 view(s)
  • barrett9950's Avatar
    Mon 18th Feb 2019, 18:06
    barrett9950 replied to a thread MURS Antenna Upgrade in Antennas
    Thank you for the reply. Can you think of any reason for this? or maybe it's just the units degrading (caps?).>>> I had one unit working good in the tree for about 10 years. Then all of a sudden it became very marginal (not acceptable). I had another unit that worked well for a couple years in another location...then I had it on the shelf for a couple years....I replaced the unit that worked good for 10 years (than now is marginal) with the shelf unit. That unit also worked very marginal in the tree.
    2 replies | 116 view(s)
  • brandon lind's Avatar
    Mon 18th Feb 2019, 17:53
    brandon lind replied to a thread MURS Antenna Upgrade in Antennas
    I would try repositioning the receiver first. That product should handle 1500 feet easily if the path is unobstructed. There are various reasons the signal could be weak. Is there a metal building in the path? Large hills? One reason VHF could behave that way is multipath fading. It is quite possible repositioning the receiver by a foot or so could clear it up. If the house has metal siding, try a window. Knife edge diffraction is useful at VHF, so there is a good chance at finding a "sweet spot". An external antenna is a viable option, but keep in mind that most coax is very lossy at VHF, keep the coax run as short as possible if you attempt that. There is little benefit to adding 3dB gain with a better antenna if the coax will eat 4dB. After looking at those antenna prices, I would just build one. If you know what MURS channel the device uses, making a ground plane antenna is very easy. There are calculators all over the internet. MURS 1 = 151.820 MHz MURS 2 = 151.880 MHz MURS 3 = 151.940 MHz...
    2 replies | 116 view(s)
  • brandon lind's Avatar
    Mon 18th Feb 2019, 17:10
    brandon lind replied to a thread Kenwood TS-130s in Kenwood
    These are great radios. Their biggest (and probably only) downfall is an undersized band switch that likes to make intermittent contact with age. If that is your problem, it will likely manifest itself in the beginning as a display problem as the counter only handles the kHz side of things ~ the band switch tells the display what goes to the left of the decimal point, not the counter board! This can usually be solved with some very careful contact cleaning and adjustment. Be careful when adjusting the contacts tighter, they easily bend too far so if the band switch suddenly stops turning, DON'T FORCE IT, they are hitting as they turn past each other! Carefully ensure proper switch rotation before closing the radio up if you do that. Could you describe your problem a bit more?
    5 replies | 2066 view(s)
  • K3SZZ's Avatar
    Sun 17th Feb 2019, 20:48
    K3SZZ replied to a thread Kenwood TS-130s in Kenwood
    Hello ... I have two kenwood ts130s. Neither work. I have heard that these models have a problem with solder not connecting. I have taken a board out but the solder looks OK. Is there something I should look for in the case of a bad solder joint? George K3SZZ
    5 replies | 2066 view(s)
  • barrett9950's Avatar
    Sun 17th Feb 2019, 17:00
    I have a base station transceiver Model M538-BS Multiple Use Radio Service (MURS) by Dakota Alert. I have the transmitter for the sensor about 15 feet up in a tree about 1500 feet away. That transmitter and underground sensor are known as the "Murs Alert Probe System" (MAPS). That is also made by Dakota Alert. The transceiver is in my living room. The reception is somewhat marginal.
    2 replies | 116 view(s)
  • hjeleas's Avatar
    Sun 17th Feb 2019, 16:36
    Hi, Thanks for the answer! I did not consider that. But, my idea was an analog mode. You have a set of noisy linear equations Ax = b, the overlay patterns and the observed reflection, with a certain error. The theory behind exists (of course) but it is very very complicated.... http://www.tapir.caltech.edu/~rom-gr/slides/Justin_Romberg.pdf
    4 replies | 527 view(s)
  • astrostar's Avatar
    Sun 17th Feb 2019, 11:21
    Hi, I have recently purchased a used Hustler 6BTV antenna and am looking to install a reinforced bottom tube in order to hopefully minimise any wind damage. I have a suitable aluminium tube which I can slide over the existing bottom tube but I am unsure of the required length needed. I would like to cut the tube so that it supports as much of the bottom tube as possible but looking at the DX Engineering reinforced tube it appears to be quite a bit shorter than I would wish. I have a 12m add-on which fits below the 10m trap so the tube will need to be short enough to accomodate this. If I make the outer tube longer than the DX Engineering one, would this alter the tuning ? If lengthening the outer tube affects the tuning can anyone with the genuine DX Engineering reinforced tube advise on the correct length ? Many thanks for your help. Graham
    0 replies | 84 view(s)
  • pmh's Avatar
    Sat 16th Feb 2019, 17:20
    pmh replied to a thread Yaesu FT-70DR works with Chirp? in Yaesu
    Why not use the Yaesu one? https://www.yaesu.com/indexVS.cfm?cmd=DisplayProducts&ProdCatID=249&encProdID=7CDB93B02164B1FB036530FBD7D37F1A&DivisionID=65&isArchived=0 Kind regards, Phil
    4 replies | 157 view(s)
  • WaveyDipole's Avatar
    Sat 16th Feb 2019, 15:58
    Please forgive my newbie questions but I am new to SDR and digital transmission. First a bit of background if I may. I had been thinking of purchasing a scanner, but it seems that everything is going digital these days including ham transmissions. Looking around there does not seem to be much in the way of a handheld radios or scanners that can do both analogue and digital. I figured that a secondhand analog scanners like AOR8200D might be worth considering, but in light of the digital revolution I am beginning to question whether that would be a wise spend? The AOR DV10 looks interesting, but evidently has frequency drift issues which according to at least one review makes it unusable. Having done quite a bit of reading, I must admit that am still finding the picture rather confusing. For the present, rather than paying a lot of money for a scanner, I decided to buy a secondhand SDRplay SDR radio to allow me to scan the bands, experiment and determine whether there is anything of interest to me that can...
    0 replies | 147 view(s)
  • K6CPO's Avatar
    Fri 15th Feb 2019, 21:15
    Just keep in mind the old adage "You get what you pay for..."
    4 replies | 157 view(s)
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