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  • KD9KVS's Avatar
    Today, 01:49
    KD9KVS replied to a thread The lovely C.B. in Non-Ham Radio
    Maybe I view things a little differently, if someone takes time to do the studying to learn how to build or do anything with anything, they are doing what they can to better themselves. Trying to remember that you were probably at that place at some point, and remaining humble to what they are doing. Maybe congratulate them and make suggestions on how they can improve it from one you built years ago. Maybe I think to simplistically, but life is to short to be haughty over anything. As Ms. Frizzle would say, take chances, make mistakes and get messy!!! Do not forget to have fun. When you have a bad memory, and have had a near death experience that forever changes your life, it is even easier to appreciate the small things. I will get off my soapbox and hush for the time being. I really do appreciate reading others stories and experiences. Thank you all for sharing, and keep them coming.
    10 replies | 195 view(s)
  • maalikm's Avatar
    Today, 01:41
    Thank you for your suggestion, however, I've found a $35 Rigblaster Plus on eBay and decided to give that a try. What is the procedure for using this interface?
    2 replies | 110 view(s)
  • 5B4AJB's Avatar
    Yesterday, 13:28
    No, you already have it working :p Those interfaces you mention only offer a seperate soundcard interface and PTT. You can use your existing PC sound interface for the same effect. The best solution for transmit interfacing without a specialised box is to try and find an old dial-up modem card, desolder the 1:1 transformer from that and connect it between the PC output and radio input. The radio output to the PC input is simply connected. For the PTT signal, the serial port RTS signal is used. Download the manual for your motherboard and see if there's a serial header on the board you can use. Here is my old faithful using an opto-isolator (recommended).
    2 replies | 110 view(s)
  • 5B4AJB's Avatar
    Yesterday, 13:17
    5B4AJB replied to a thread The lovely C.B. in Non-Ham Radio
    That's not uncommon, especially if it's an OT club, happened to me. I'd just got my first callsign, built a Double Diamond for 2m and took it to a friends club where I was asked how I designed it and replied that it was built from a book, immediate mockery followed, which kind of put me off clubs for a long time...
    10 replies | 195 view(s)
  • 5B4AJB's Avatar
    Yesterday, 13:10
    Have you tried an old satellite dish with a simple USB dongle at the feedpoint?
    2 replies | 84 view(s)
  • Tempstar's Avatar
    Yesterday, 13:10
    https://www.streakwave.com/itemdesc.asp?ic=APG5HacT2HnD&eq=&Tp=&o1=0 I use this 3/4 mile away daily.
    2 replies | 84 view(s)
  • 2e0sve's Avatar
    Yesterday, 12:09
    Does any one have any experience and recommendations on long range WiFi antenna. The kind of things I mean is using remote WiFi with an external antenna. I am particularly interested in experience in urban environments. Kind of thing I mean is like these (these are just from a fairly simple google). https://uk.rs-online.com/web/p/products/7839634/?grossPrice=Y&cm_mmc=UK-PLA-DS3A-_-google-_-CSS_UK_EN_Computing_And_Peripherals-_-Wireless_Components_And_Modules%7CWifi_Antennas-_-PRODUCT_GROUP&matchtype=&pla-428943044526&gclid=EAIaIQobChMI-5by5YGq4gIVjpTtCh1GawdKEAQYASABEgItAPD_BwE&gclsrc=aw.ds https://www.aliexpress.com/item/VOBERRY-New-Long-Range-3KM-High-Power-5800MW-58DBI-USB-Clipper-Wireless-Wifi-Adapter-Antenna/33000800086.html?spm=a2g0o.productlist.0.0.76b94295MmeFsD&algo_pvid=2ceae380-e246-4d80-bd61-c1e4e164f843&algo_expid=2ceae380-e246-4d80-bd61-c1e4e164f843-1&btsid=a4089da0-35d9-4cba-a63c-543a75df3ae1&ws_ab_test=searchweb0_0,searchweb201602_5,searchweb201603_52 ...
    2 replies | 84 view(s)
  • KD9KVS's Avatar
    Sun 19th May 2019, 23:40
    KD9KVS replied to a thread The lovely C.B. in Non-Ham Radio
    I'll have to give it a go. Won't be tonight as storms have been rolling through, but soon. I still enjoy cb. Sent from my SM-S767VL using Tapatalk
    10 replies | 195 view(s)
  • brandon lind's Avatar
    Sun 19th May 2019, 19:11
    I decided to compare VF measurements using 4 different pieces of equipment on the same coax cable. Equipment used: RigExpert AA-170, Picoscope 3206D with homemade TDR, Bside component tester, and a Klein Tools MM400 DVM. The cable was an OPEK RG-58/U (radio shack variety) previously cut as a 1/2 wavelength 11m cable for measuring antenna feed point impedance's. To my surprise, the Bside component tester managed to yield a number almost identical to the TDR measurement. I shared the PDF of all the pictures i took along the way on google drive. its 14 something MB https://drive.google.com/open?id=1ThJ6zrwlD6vQRavGTGX92HG9m61x7G3Z
    0 replies | 86 view(s)
  • maalikm's Avatar
    Sun 19th May 2019, 17:39
    I have an Icom IC-725 and I have been able to use it to listen to digital modes by connecting the "phones" output to the line in on my PC. However, I am unsure how to transmit on these modes using this radio. Will I have to purchase a rig to sound card interface such as the "Rig Blaster" or the "Signalink" or is there a work around? If I do indeed require an interface, how would I use it to connect my PC to the radio. And if I don't what is the method? What is the difference between the Signalink and the Rigblaster? I predominately wish to use the PSK31 mode. Any help would be very appreciated.
    2 replies | 110 view(s)
  • brandon lind's Avatar
    Sun 19th May 2019, 16:42
    You can also measure velocity factor with a DVM. At this point, a dozen people are ready to yell at me, so here’s the disclaimer: The DVM needs to have the ability to make very accurate capacitance measurements, your average Walmart DVM isn’t going to cut it here. The concept is sound and it’s fun to try, so here it goes. Take a capacitance measurement (F) of the open-ended cable and divide it by the number of feet in that cable. This is capacitance per foot. Multiply that by the characteristic impedance of the line. The result will be the time in seconds it takes for a signal to go down one foot of that line. Being we know it takes light 1.017ns to go a foot in free space, dividing that by the cable time gives the velocity factor. I just did this with my Klein Tools MM400 DVM and came to .61VF. I know this cable to be .66VF using stub resonance at HF. Not bad for a Walmart DVM  http://www.montana.edu/blameres/courses/eele461/information/TDR_AppNote_Agilent_MeasCL_apr96a11.pdf
    3 replies | 85 view(s)
  • brandon lind's Avatar
    Sun 19th May 2019, 14:23
    brandon lind replied to a thread The lovely C.B. in Non-Ham Radio
    The 11m band has been simply amazing the last few weeks, the sun has treated us well and mother nature has been lifting her skirt almost every day this month!. Hook one up, you might hear "Loose Wire" aka "WR786-Northern Minnesota" on 38LSB! Dig through that box and find one with a nice big crystal filter like a cobra 140 or a midland 13-892 and give me a shout! In the US, 4 watts is the AM limit. sideband you can run 12 watts. 12 watts is more than sufficient! 73, KE0KOY Brandon
    10 replies | 195 view(s)
  • brandon lind's Avatar
    Sun 19th May 2019, 14:07
    What I like to do is connect the open-ended transmission line with a 50ohm resistance in parallel (or 300 ohm in your case and assuming your analyzer can be set to a 300ohm system impedance) at the analyzer end. Then do an SWR sweep with the analyzer with a range in the expected neighborhood. Then lessen the range and do it again for a closer look at the dip. Since a half-wavelength open-ended transmission line will have an infinite impedance at the input end, and this is in parallel to the resistor, the only load the analyzer will see is the resistor. This gives you an SWR dip at the half-wavelength frequency and avoids attempting to make the measurement at the limits of the analyzers capability where accuracy is compromised. EDIT: It is likely that the second peak not being where you expect could be because, as frequency changes, so does the skin effect. When the skin effect changes, the current distribution in the conductor changes which in turn changes the inductance. Being inductance is one of the...
    3 replies | 85 view(s)
  • KD9KVS's Avatar
    Sun 19th May 2019, 12:49
    KD9KVS replied to a thread The lovely C.B. in Non-Ham Radio
    I enjoy hearing about so many starting on CB, or using it before being licensed. It really does seem as though CB is used more similarly to ham in the UK, rather than another species completely, as it is here in the US. Sent from my SM-S767VL using Tapatalk
    10 replies | 195 view(s)
  • KD9KVS's Avatar
    Sun 19th May 2019, 12:44
    KD9KVS replied to a thread The lovely C.B. in Non-Ham Radio
    Andy that's a cool story, surprised about the radio club not even talking to you, that's pretty wild! In the US 11 meters is the CB "band". Frim what I understand, UK has 11 meter open for use, and with less restrictions than we have here. We are allowed am, ssb without a license on the CB, but we are limited to 4 watts, which most CB radios I think exceed that out of the box now. The regulations have become so loose here it is not funny. Most people, it seems, have abandoned radio communication for the speed and convenience of cellphones. I figure that leaves airwaves open for those of us who prefer it. So have things changed as far as the groups go? When I went to an amateur radio group here, they were open to listen and converse about things. I learned from them, and they learned some newer things from me. I enjoyed it, and had a lot of fun, and hope I have an opportunity to rejoin them at some point. Sent from my SM-S767VL using Tapatalk
    10 replies | 195 view(s)
  • OH8GAD's Avatar
    Sun 19th May 2019, 09:55
    OH8GAD replied to a thread The lovely C.B. in Non-Ham Radio
    I didn't actually start with CB - my dad was a licensed radio amateur for many years and a SWL for a long time before that. But, I used CB before getting my amateur license.
    10 replies | 195 view(s)
  • 5B4AJB's Avatar
    Sun 19th May 2019, 09:02
    I was always told open feeder had the lowest loss (at H.F. anyway). Try it with a load on the end, or a simple short and see what happens...
    3 replies | 85 view(s)
  • W6TZI's Avatar
    Sun 19th May 2019, 05:54
    W6TZI replied to a thread Dipole support question. in Antennas
    Boom truss, boom truss assembly, boom truss support... seems you are thinking of a boom truss. Hope this helps 73 W6TZI
    2 replies | 182 view(s)
  • VK2AJS's Avatar
    Sun 19th May 2019, 02:19
    I got the bright idea of trying to use an N1201SA portable vector impedance analyser to find the velocity factor of some 300 ohm TV ribbon. I figured just connect a random length of open circuit ribbon to the analyser, note the lowest frequency where the impedance peaked & that would correspond to half a wavelength. So I hooked up a 156mm length & noted the impedance peaked at 1094MHz. Now 1094MHz is a wavelength of 274mm, a half wavelength of 137mm. So my physical 156mm half wavelength line at 1094MHz has an electrical half wavelength of 137mm, meaning the velocity factor is 137/156=0.88. So far so good. Next I noticed another impedance peak at 1980 MHz. This has me worried because I expected the full wavelength peak to be at 1094 x 2 = 2188MHz. The 1980 value gives me a velocity factor of 0.97 I get the feeling I'm missing something?
    3 replies | 85 view(s)
  • AndyG0CCX's Avatar
    Sat 18th May 2019, 23:42
    AndyG0CCX replied to a thread The lovely C.B. in Non-Ham Radio
    I held off from illegal AM or SSB in the UK until FM was legalised in 1981. Like many, I soon got fed up with some of the inane rubbish, and migrated, along with many of the more serious locals, on to SSB and FM on, er, not quite legal frequencies. But with only a handful of people to talk to locally, and having made a few trans-Atlantic QSOs, it got me thinking about getting a ham licence. After some dithering and with some of my friends having deserted CB for 2m amateur, I kicked myself in the proverbial butt and gave myself just two months to take and pass the Radio Amateurs Examination in 1984, becoming licensed as G1ICE and then taking the CW test to get the Class A call sign I hold now. So although it's knocked by many, I have a lot to thank CB for, and from what people tell me (and I must admit that although I still have a couple of CB 27/81 FM sets but don't use them) it would seem that the inane babble from the idiots has largely gone. Would I go back to it? Well, I don't really need to, and for...
    10 replies | 195 view(s)
  • KD9KVS's Avatar
    Sat 18th May 2019, 21:55
    KD9KVS replied to a thread The lovely C.B. in Non-Ham Radio
    This is a very good point. I have always been a hands on learner. If you want to teach me let me do it so I can remember. All that to say, being active is important. I also know some people prefer to see someone else do it, so having the option for them to watch as the hands on guys are doing it is a great way for everyone to learn. Great recollection of how things went for you. Thank you for sharing. Sent from my SM-S767VL using Tapatalk
    10 replies | 195 view(s)
  • 5B4AJB's Avatar
    Sat 18th May 2019, 18:23
    5B4AJB replied to a thread The lovely C.B. in Non-Ham Radio
    I did. It is a good way to start off - visiting a huge scout camp in Switzerland many years ago, they had a C.B. station set up to talk to the other end of the camp. I was fascinated by it, went outside and saw there were no wires to the other end, it was all downhill from there pretty much... My brother-in-law gave me a radio, antenna & power supply to start me off, when the UK PR-27 band came out, I got one, it was pretty dead down there, but made a few contacts. The 934MHz C.B. band was a bit of an eye-opener, many of the users were already licensed radio amateurs and encouraged me to take the test, which I did with a small group of locals. We progressed onto 2m, 70cm and eventually, sat the test for H.F. Probably the most enlightening aspect for a beginner is joining an active club. I've been through quite a few inactive ones and although they are a good way to socialise etc, an active club always keeps your interest, as more members do different, new things.
    10 replies | 195 view(s)
  • KD9KVS's Avatar
    Sat 18th May 2019, 16:27
    KD9KVS started a thread The lovely C.B. in Non-Ham Radio
    Okay, I know I can talk around the world with ham, and C.B. radio had a period where it went down hill pretty severely. Yes I've got my ham license, no I don't want to hear how bad it is I use C.B. too. Okay, so I got a box of C.B. radios for next to nothing, and they have been properly tuned and amplified, again I am aware that anything over 4 watts is illegal, aka tweaked and peaked. These radios are great for road trips and such and CB is where I got started and has held my interest for years. It seems as though use overall in my area is down to very little except some true oldtimers. Is there anyone else willing to say they started on a CB and it's still a great way for unlicensed communications, and has a viable spot on the shelf next to the all bander, or even in the all bander transmission list low power? Just a brain picker question. Sent from my SM-S767VL using Tapatalk
    10 replies | 195 view(s)
  • 5B4AJB's Avatar
    Sat 18th May 2019, 11:05
    5B4AJB replied to a thread Base Radios Icom 7600 in Icom
    Sounds like a stuck relay or a faulty final?
    1 replies | 64 view(s)
  • Deputygeorge's Avatar
    Fri 17th May 2019, 21:14
    Deputygeorge started a thread Base Radios Icom 7600 in Icom
    When I push putt on Desk Mic or hand held, radio goes into txmt fine, but when button released, radio does not seem to go back to full receive. About half volume until I press putt again. Tried several different Mic. Same thing. Grounds check fine. HELP
    1 replies | 64 view(s)
  • 5B4AJB's Avatar
    Fri 17th May 2019, 12:29
    For receiving anything above about 30MHz, you need antenna height & low-loss coax. A wideband masthead preamplifier can be useful here, but the signal gain can overwhelm most receivers. Mounting any antenna inside a roof is fine, until it rains, then the antenna is effectively shielded. If you can get away with mounting a vertical outside, you will pull in more signals for the same height. Fibreglass/plastic coated antennas have less noise during rain than exposed aluminium/stainless ones, each rain drop carries a small charge which is picked up by your receiver when it touches Earth. Go ahead and acquire some old scanners, you can never have too many radios...
    2 replies | 408 view(s)
  • WaveyDipole's Avatar
    Fri 17th May 2019, 10:11
    Well its been three months since I made this post and not a single comment!. Well I think that the SDR radio was the right way to go as a starting point. The folks over on SDRPlay, DSD+ and elsewhere have been helpful and I have been able to decode some DMR and Fusion signals using DSD+ as well as experimenting with DIY antennas with reasonable success. Question 1 was answered when SDRPlay released SDRuno v1.31 which now has a scanner feature and this does seem to work quite well. With regards to question2, which I perhaps could have phrased better, the answer seems to be very little. Apart from some HF broadcast stations, I did pick up some voice on the amateur radio bands (80m, 40m) but mostly in languages other than English. There seemed to be no analogue voice on the 2m or the PMR band or with the exception of airband, anywhere else on VHF/UHF. In answer to question 3 I picked up a couple of local amateur radio repeaters transmitting digital signals which I decoded with DSD+. I have still not...
    2 replies | 408 view(s)
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