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
  • kc1dgg's Avatar
    Today, 00:37
    Sounds less distorted but still tinny with external speaker.
    2 replies | 75 view(s)
  • 5B4AJB's Avatar
    Yesterday, 16:08
    Open it and change the speaker? Have you tried an external speaker?
    2 replies | 75 view(s)
  • kc1dgg's Avatar
    Yesterday, 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 | 75 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 | 82 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 | 82 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 | 2049 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 | 2049 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 | 82 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 | 513 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 | 70 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
    2 replies | 123 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 | 133 view(s)
  • K6CPO's Avatar
    Fri 15th Feb 2019, 21:15
    Just keep in mind the old adage "You get what you pay for..."
    2 replies | 123 view(s)
  • jmsolf's Avatar
    Fri 15th Feb 2019, 19:20
    Hello everyone I’m looking for a tutor in the Kansas City or liberty Missouri area. I’ve been a ham operator for many years and have forgotten everything I’ve ever learned. I have a Alinco DR-110 and a Kenwood TS-450S but haven’t a clue how to operate them anymore. If anyone would care to help this aging ham how to figure this out I would certainly appreciate it thank you. Oh crap. One more thing, my license has expired. I just wanna be a General Class again.
    0 replies | 101 view(s)
  • DougT's Avatar
    Fri 15th Feb 2019, 16:10
    I have a new Yaesu FT-70DR. I have not found any way to use Chirp to program the radio. I would like to use Chirp, since I like Linux a lot more than Windows.
    2 replies | 123 view(s)
  • Steffen_W's Avatar
    Tue 12th Feb 2019, 09:43
    Hi Ibtissam, first of all, thanks again for your help. If I switch 57 9600bps Mode OFF, the communication doesn't work correct, even with the audio connection from pc soundcard. 63 USB2/DATA1 Func can only be set to or , but not to So I cannot try your suggested settings. Best regards
    9 replies | 2684 view(s)
  • Paul1's Avatar
    Mon 11th Feb 2019, 19:52
    Paul1 started a thread Base Radios FT 450 AT in Yaesu
    Hi guys I would like to know if there is any chance that the radio catport could be accidentally switched off, maybe by a crash. The radio has lost contact with my contest program, N1MM and I can't reset the radio. I have eliminated the comport of the PC and also the catlead. so that leaves either the radio catport output or a config error. I have been using N1MM classic for years and am sure the config is correct. I have tried N1mm classic and also N1MM+ and N1mm site isn't much help, so please any suggestions? Thank you 73 Paul/M0SEV
    0 replies | 121 view(s)
  • KC3KSB's Avatar
    Sun 10th Feb 2019, 21:58
    KC3KSB replied to a thread Handheld Radios FT-70 Select Memory Bank to Scan in Yaesu
    I got it working. The file I sent to the radio had memory channels in banks 1, 2, and 3. Here is what I had to do...in memory mode (normal memory mode, not memory bank) select a random memory, press and hold V/M key. "F" blinks in display. Rotate the dial to a bank that you don't have memories registered to. Press the V/M key to save. Now, while in memory mode, pressing "band" switches between all memories and memory bank mode. Memory mode displays "memory" for a moment, memory bank mode will display the "bank number/name" for a moment. In memory bank mode, press "F" then "band", now use the knob to select what bank you want, then press "band". Pressing "F" then "scan will scan just the bank previously selected.
    8 replies | 1463 view(s)
  • brandon lind's Avatar
    Sun 10th Feb 2019, 20:46
    That's interesting. It reminds me of Hellscriber. In "hell", each letter is composed of an 8x5 grid of blocks that are either black or white. The presence or lack of a carrier at a given time sets the blocks black or white. As far as I can tell, it goes from top down and left to right in an 8x5 grid. "Slow hell" is slow enough to hear that, given "1" is signal and "0" is no signal, "11000011 00100100 00011000 00100100 11000011" would print "X". A photo in gray scale could be sent in the same manner by increasing the number of blocks to 800x600 and changing number of bits per color to represent levels of gray. But your idea is different from that... you want to go over each of the 800x600 blocks with one bit several times to selectively increment the black content. Its a good idea and may spread out and lessen the contrast of errors. However, in the first paragraph, 800x600 positions at 7 bits of data per position (for 2^7=128bit gray scale), comes to 800x600x7 = 3,360,000 bits of data to transfer the...
    4 replies | 513 view(s)
  • K6CPO's Avatar
    Sun 10th Feb 2019, 20:36
    K6CPO replied to a thread Handheld Radios FT-70 Select Memory Bank to Scan in Yaesu
    My suggestion is to get rid of ADMS-10 and buy the RT Systems programming (and cable) for the radio. Yaesu programming software is notoriously bad and very limited compared to the RT Systems product. I did this with my very first Yaesu HT and I haven't looked back...
    8 replies | 1463 view(s)
  • KC3KSB's Avatar
    Sun 10th Feb 2019, 19:46
    KC3KSB replied to a thread Handheld Radios FT-70 Select Memory Bank to Scan in Yaesu
    I know this thread is old. I had resolved the issue, and was able to scan one bank at a time. My radio was reset while using ADMS-10. I sent the file I had stored on the computer to the radio. The information is back on the radio, but now it is back to scanning all the memories, and I again can't get it ti scan just one bank. In fact it says "no bank" again, even though I manually registered memory channels to banks, which fixed it the first time around.
    8 replies | 1463 view(s)
  • hjeleas's Avatar
    Fri 8th Feb 2019, 18:45
    Hi, Thanks for the respons. Yes, I'm proposing a new communication mode to send images. I'm thinking of a mode like SSTV. As there are N^2 patterns and an equal number of observations needed to completely encode an NxN image, you'll need a lot of carriers ; Basically, the mode encodes N*N linear equations on the spectrum for an NxN image. It is possible to spread the equations over time, to achieve a slower version with lower bandwidth. I think we need to assign a frequency, a number, to a Hadamard pattern.
    4 replies | 513 view(s)
  • brandon lind's Avatar
    Fri 8th Feb 2019, 00:05
    This article is a good one. It gets right into the theory and math. 6 pages. http://bcpink.com/KB3IFH/files/Download/Gamma%20Match%20article.pdf
    1 replies | 170 view(s)
  • KJ6UQQ's Avatar
    Thu 7th Feb 2019, 05:27
    I am in the process of building a dual band handheld yagi for satellite contacts. I have a question, how far away from the driven element should the gamma match be? Like the distance between the two parallel rods? Sent from my moto x4 using Tapatalk
    1 replies | 170 view(s)
  • KM4COF's Avatar
    Wed 6th Feb 2019, 20:09
    Thank you essbee. HF is on my horizon.
    2 replies | 194 view(s)
  • essbee's Avatar
    Wed 6th Feb 2019, 20:01
    Hello from Lynchburg, VA - not so far from you. I want to welcome you to the forums. You have quite a background in comms. I enjoy 2M/440, and also HF. Sent from my SM-G950U using Tapatalk
    2 replies | 194 view(s)
  • 5B4AJB's Avatar
    Wed 6th Feb 2019, 18:04
    That's pretty much your only constraint - I've made a few of these antenna and they all worked great (to a degree). They're performance is similar to a dipole but with far less noise. Bear in mind, if you put 100W into it your capacitor should be rated for about 10kV so mount it out of reach of children & animals. Performance at ground level is pretty good, although I used a 1.5m diameter one just sitting on the carpet on the first floor (worked all continents). Anyway, try to find a nice big variable capacitor and make up a remote tuning device with lots of gear reduction...
    3 replies | 185 view(s)
More Activity