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  • OK1RP's Avatar
    Today, 13:20
    OK1RP started a thread Base Radios Orion upgrade options availability in Ten-Tec
    Hello, sorry to bother over here but I would like to ask kindly if someone can let me know if it is possible to buy somewhere second receiver (subRX) board for Orion II and/or internal auto-tuner board please? I have chance to buy Orion II w/o these options which are mandatory (almost) for me so I am interresting if it is chance to find them somewhere additionaly and install it to it after purchasing the Orion... Many thanks, 73 - Petr, OK1RP
    0 replies | 12 view(s)
  • AndyG0CCX's Avatar
    Yesterday, 07:46
    Well, if you've just got your license and want to check out what's on 2m and 70cm near to you (and you don't want to spend a heap of money) the the little Baofengs will do the job (you'll have read through all the comments about them or you wouldn't have called them 'sub-par'). I have a couple and they do just fine, for local simplex on 2m and for running through local repeaters on 2m and 70cm. If I should drop one or it gets stolen, it's £25. My wife and I had a meal out on Saturday that cost more than that, so I won;t be crying! But you could also look around and get a used Yaesu dual bander for little money. Does the same job, but better. If you haven't yet got your licence, then that's the first step, of course. Find local clubs and meet up with other hams. Find out what YOU want to get out of the hobby and go down that path. 2m and 70cm is a good start but you might find yourself drawn to HF SSB, digital modes or microwave frequencies!
    1 replies | 109 view(s)
  • cobalt75's Avatar
    Yesterday, 00:04
    Hello all! I am totally new to this and have what most might consider a sub-par radio in a BaoFeng UV-5R. I am looking however to get the most out of it in my area. If you can help guide me to posts or links I would be very appreciative. Thanks in advance.
    1 replies | 109 view(s)
  • brandon lind's Avatar
    Mon 15th Jul 2019, 14:01
    Even using lora, you are not getting 500 miles out of a 10w VHF transmitter reliably. For VHF to work that far (without legal limit power and a prohibitively expensive antenna array and feed line) you would need to have an extensive knowledge of RF propagation and a keen eye on the weather. It is an absolute mystery to me why preppers (im one too) always jump straight to VHF for their communication needs when HF is super reliable for DX work... Actually prepping for a communications blackout will require far more than an arduino and a few youtube videos, no offense intended. Heck, even CB is more reliable for 500 miles than what you wish to do. Get an HF radio/license and study radio wave propagation. Each band is specific in how it refracts or absorbs in the various layers of the ionoshpere (for HF) or atmosphere (for VHF and up), which is why the military use radios that periodically probe the ionoshpere back and forth and automatically set to the best frequency for a given scenario. At 500 miles,...
    6 replies | 4859 view(s)
  • KI5BUC's Avatar
    Mon 15th Jul 2019, 04:48
    KI5BUC started a thread New Call Sign in Username Changes
    Hello, Can you please change my user name to reflect my new call sign. It's K5DBC. 73
    0 replies | 76 view(s)
  • jcane's Avatar
    Fri 12th Jul 2019, 05:33
    jcane started a thread KM6FMR Intro in Introduce yourself
    Greetings everyone, Looking to grow my radio skills and become more active in the HAM community. Currently running with Echolink and want to get my indoor radio kit/antennae setup soon. I'm currently doing research on indoor and mobile setups, any recommendations are appreciated. Also very interested in Packet Radio and Mesh networks. Would love to get more exposure to this technology and how to utilize it. Cheers, KM6FMR
    0 replies | 113 view(s)
  • Sparks1973's Avatar
    Wed 10th Jul 2019, 15:27
    My son lives 500 miles away from me and being prepper. the thought of him in a rid down situation just kills me. I would like to set up a lora message system and voice over ham to be able to communicate with him and others. how many meters wave length with what sort of linear amplifier and antenna should I look at that is both compact compadable with a Shield?
    6 replies | 4859 view(s)
  • AB6WP's Avatar
    Wed 10th Jul 2019, 08:29
    AB6WP replied to a thread Base Radios Yaesu FT-900 with no Power output in Yaesu
    Dear Brandon, I value your comments greatly. Once I get to the FT-900, I will make the few static measurements with the DMM as you suggested in your last posting. For now have been able to construct an RF probe as per VA7OJ/AB4OJ article on the net. I can also make a simple oscillator to put out a few milliwatts. 73 de AB6WP
    6 replies | 346 view(s)
  • Redbicycle's Avatar
    Mon 8th Jul 2019, 17:47
    Try stop bits of 1. You can try installing the arduino development en. It comes with a very nice serial port terminal that will let you see what the port is or is not tx/rx. Sent from my iPhone using Tapatalk
    2 replies | 143 view(s)
  • Ots's Avatar
    Mon 8th Jul 2019, 15:52
    Ots replied to a thread Base Radios Kenwood TS-2000 CAT connection and parameters in Kenwood
    Kenwood's web site has a download for using the Kenwood control software and it covers interfacing with a pc. It's not much but maybe it'll help.
    2 replies | 143 view(s)
  • brandon lind's Avatar
    Mon 8th Jul 2019, 03:16
    brandon lind replied to a thread Base Radios Yaesu FT-900 with no Power output in Yaesu
    it is unlikely you would hear the signal trying to drive the final. I have had a few instances where I know for sure it didnt make it out of the radio.. Just start out seeing if the diode junctions in the final transistors are functioning with a DMM on a diode test setting. Unplug radio, get to final section. Positive lead to base and negative lead to collector and emitter. there should be a reading of around .65 to .75 volt if they are good
    6 replies | 346 view(s)
  • W5KAP's Avatar
    Mon 8th Jul 2019, 00:09
    I recently decided to go ahead and interface my TS-2000 with my Dell laptop. I'll be using Log4OM and Omnirig which was downloaded as part of the Log4OM download. I purchased a serial cable with the FTDI chip set in it and downloaded the drivers onto my Dell. I can't seem to get the two communicating. I used 4800 baud, no parity, and two stop bits. Since that didn't work, I tried very combination I could and none of them o=worked. I can tell my computer sees the cable as a com 5 because "com ports" disappears when I remove the cable. I cannot find any thing oertaining to proper CAT settings in my Kenwood TS-2000 manual. Any help would be greatly appreciated. 73 de Kenn W5KAP
    2 replies | 143 view(s)
  • Dale's Avatar
    Sun 7th Jul 2019, 20:33
    Dale replied to a thread Balun for Underwater Antenna in Antennas
    Thanks for your interest in this topic. When I started this project I was surprised how well HF and VHF propagate in fresh water. As you can see in the following paper, the losses are much lower in fresh water than in sea water. https://file.scirp.org/pdf/JEMAA20110700001_18390291.pdf I have validated and extended these calculations to better address our particular needs. Our proof-of-concept used an Archimedean spiral antenna (because the math and antenna construction are straightforward) with +10 dBm input and we had good rx strength in nearly 10 m of lake water and a distance to shore of 200 m. https://vtechworks.lib.vt.edu/bitstream/handle/10919/25963/Caswell_etd_Ch2.pdf However, the form factor of the Archimedean spiral won't work for our application (diameter is way too large) so I designed a QFH, which, although tall, has a diameter of only 13 cm and does not require a ground plane. I simulated the antenna in air using openEMS (by scaling due to e_r of about 80) and got good results. ...
    2 replies | 199 view(s)
  • K6CPO's Avatar
    Sun 7th Jul 2019, 19:33
    K6CPO replied to a thread Handheld Radios Advice on FT-60R accessories in Yaesu
    I would recommend against the VOX headset. VOX can be difficult to adjust for optimum operation, especially in high noise environments. And they are pricey to purchase. Instead I recommend the Heil HTH-Y HT headset. These can be had for about $30 and are superior in audio quality to the Yaesu VOX headsets. My friend and I were working a large military air show and the net control operator said we had the best audio of anyone else, including two operators with the Yaesu VOX headsets. My HTH-Y worked like a dream until I ran over it with my truck. I immediately went out and bought another. (I'm now in the process of piecing the broken one back together with super glue, just to see if I can get it working again.) I didn't like the stock antenna on the FT-60 because it would easily get bent (mostly from my fat mid-section) and was difficult to straighten. Also, it's not the best in terms of reception and transmitting. As a replacement antenna, most people buy the Diamond SRH77CA dual-band antenna. I...
    4 replies | 232 view(s)
  • OH8GAD's Avatar
    Sun 7th Jul 2019, 18:46
    Unless your anticipated range is less than one metre, I wouldn't use 27 MHz. In most cases I have heard UW comms takes place below 30 kHz (reference: https://en.wikipedia.org/wiki/Communication_with_submarines#Very_low_frequency) There are cases where folk are trying to use 2,4 GHz (reference: https://www.mdpi.com/1424-8220/16/6/890/pdf)
    2 replies | 199 view(s)
  • fauxfly's Avatar
    Sun 7th Jul 2019, 12:11
    Getting back to Hamming after about 20 years off...I used to run a small qrp rig for 40 meter CW and loved it- Now I'd like a small amp to add a little more power - I'm curious about these Chinese amps you see on Utube and for sale on Ebay/Amazon for only a few dollars. Do they really work?? Are they worth it or pretty much junk?? Recommendations for a HF amp - maybe 25 Watts or so?? Thanks guys!! (just wrote element 2 and 3 yesterday and am waiting for a new call sign - had to start over from the beginning as I had expired a few years back. I'd like to have a jump on the ability to transmit)
    0 replies | 130 view(s)
  • SNOGAL's Avatar
    Sat 6th Jul 2019, 20:23
    SNOGAL replied to a thread Handheld Radios Advice on FT-60R accessories in Yaesu
    AC5PS, thank you for your reply. I was drawn to HAM radio for emergency/disaster purposes. I knew nothing of electronics or radios until the first day of the 2-day Tech class and then crammed some Gen'l test questions into my brain and passed both after the 2 day class plus 2 more days of studying. Now I have a General license but know next to nothing. I think you make good points. My plan is to get the FT-60R just to get on the air and get going with something, while I continue to actually learn some of this stuff. I'm joining my local RACES club. I hope to get to know people a lot more knowledgeable than I am, maybe get to see and try out some radios, see what other HAM interests may develop and go from there. I looked at reviews of more powerful and more expensive transceivers and I see comments about people who prefer easier knob-driven rigs with less functionality or others who prefer more functionality in a menu-driven setup. Until I get out there and try some things, I don't know what I...
    4 replies | 232 view(s)
  • Redbicycle's Avatar
    Sat 6th Jul 2019, 14:35
    Redbicycle replied to a thread Handheld Radios Advice on FT-60R accessories in Yaesu
    Comet sells a mobile antenna I think it is sb5 that will work with no groundplane. It could work for your base station antenna. I am using one on a mobile mag mount sitting on top of my central air unit. I use the same setup on my truck roof. Sent from my iPhone using Tapatalk
    4 replies | 232 view(s)
  • AC5PS's Avatar
    Sat 6th Jul 2019, 12:53
    AC5PS replied to a thread Handheld Radios Advice on FT-60R accessories in Yaesu
    The FT-60 is a good HT, I have one. What you are wanting to do will get you started but you probably will not be %100 satisfied. HTís are really not meant to be used as a mobile or fixed station. As a mobile you may have difficulty hearing with the built in speaker and 5 watts is not much power for a mobile. You need a 2M / 70CM duel band mag mount antenna that has a connector that matches the ft-60. Used as a fixed station with a high gain antenna you may receive a lot inter modulation.
    4 replies | 232 view(s)
  • W5FCX's Avatar
    Sat 6th Jul 2019, 00:51
    W5FCX replied to a thread Questions about G5RV Jr. in Antennas
    I would suggest a ZS6BKW instead of G5RV. You can see the differences here: https://www.w5ddl.org/files/Zs6bkw_vs_G5rv_20100221b.pdf I havenít used the Jr variant but have built and used ZS6BKW and regular G5RV. The G5RV has a lot of trouble getting out. I could hear okay but received many poor signal reports and even more no responses when I could hear them just fine. I have also built my own stealth ZS6BKW antenna for an HOA home. It uses #26 polystealth black wire and is virtually invisible. The apex is only 20í up on 2nd story and itís legs slope outward, making it a sloping bee. Very much a compromise antenna. Itís resonant on 20 and 40 and tunes up on all others 80m through 10 (with tuner). If I can hear them, they can usually hear me on 100 watts (without pileups). If it were m, Iíd skip the G5RV Jr and graduate to the ZS6BKW. Hope thatís helpful.
    1 replies | 238 view(s)
  • SDBiker's Avatar
    Fri 5th Jul 2019, 21:38
    SDBiker started a thread Base Radios Kenwood 830s needs help in Kenwood
    I have recently came by a Kenwood 830s. It receives fine, but I do not seem to be able to tune it up for transmission. When I set it up for tuning, I am unable to dip the drive. Can anyone give me some insight into what the problem may be.
    0 replies | 106 view(s)
  • SNOGAL's Avatar
    Fri 5th Jul 2019, 21:25
    SNOGAL started a thread Handheld Radios Advice on FT-60R accessories in Yaesu
    I have just passed my Tech and General exams and I have decided to start with an FT-60R HT. I would appreciate advice on antennas - - which one to replace the rubber duck antenna that it comes with for outdoor, portable use? - which one for putting on my car for in-car use? What else is needed to make it stick to car roof? - Do I need another one if I am using it in my house? I'm pretty intimidated about setting up a large antenna at the moment. Regarding other accessories, this is what I'm thinking and either validation of these or additional recommendations would be helpful: - VOX Headset: VC-25 - Lithium-Ion Battery Pack: Vertex FNB-RG-67LI
    4 replies | 232 view(s)
  • Dale's Avatar
    Fri 5th Jul 2019, 18:44
    I have designed and built a 27 MHz QFH antenna for a fresh-water wireless sensor system (1.2 m wavelength in water). The QFH presents a balanced load. Since the medium is water, the antenna impedance is low, measuring 13+j0 ohms at 27 MHz with an antenna analyzer (MFJ-259C with a half-wavelength of coax to the antenna). The radio module is 50 ohm unbalanced, hence the need for a balun. I wound a balun on a TDK B62152A0001X001 binocular core using #26 magnet wire: 8 turns and 4 turns. After installing the balun at the antenna feed point, I measure Z = 52+j34 ohms. The real part of Z is good but not the reactive part. Should I use a capacitor to compensate? Alternatively, given that this is a low-power (+15 dBm) narrowband application, would I get better performance by using a LC balun network?
    2 replies | 199 view(s)
  • sundancer398's Avatar
    Fri 5th Jul 2019, 16:58
    first off, good morning. Im new to here. KN4PWE. My Yaesu FT8900 will not communicate from the radio to the computer. Radio has been to Yaesu and received good bill of health and did in fact clone for them. Each time you attempt to get data from Radio it registers "error" (on Radio) FT systems are stymied. Anyone else have this problem and if so offer suggestions? I appreciate any info.
    0 replies | 114 view(s)
  • W5FCX's Avatar
    Fri 5th Jul 2019, 13:42
    Hi, Iím working on a new software defined antenna project that uses wireless relay boxes instead of traps. The key to success is very low power operation. In order to keep the power low, I need a means of detecting a wireless (non conductive) wake up signal that requires very little current drain (a few microamps or less ideally). The wake up detector senses the signal to awaken, at which point sub-GHz ISM band RF communications that consumes up to 5 milliamperes of power ensues to receive the actual switching information via Arduino or PIC MCU, which drives a latching relay to switch antenna segments in/out. I have researched the latest state of the art Wakeup RX papers. They all seem to suffer from limited distance - just a few meters. Attempting to further amplify the incoming wakeup signals involves preamps whose quiesce currents are in the milliamperes range and thus far all experiments and research suggests this is not technically feasible today via an RF wakeup approach. Whatever solution...
    0 replies | 113 view(s)
  • AB6WP's Avatar
    Fri 5th Jul 2019, 08:37
    AB6WP replied to a thread Base Radios Yaesu FT-900 with no Power output in Yaesu
    Since I keyed the FT-900 next to a known working receiver, at the same frequency and with both antennas a couple of feet from each other, and did not get any faint signal on the receiver, I would estimate there is no drive to the final amp. My logic, however non-academic and without any means of signal detection such as oscilloscope, RF probe, etc., was to remove the input to the final ampl., feed it with a low power signal, then key the FT-900 to see if there was any actual power out of the final ampl. If there is any power out, then the problem is with the drive or pre-drive. Have not done the above because I am traveling and away from the radio, but will heed your warning and start with very low power first, as you said, in the milliwatts range. Clearly, the above is nothing short of a "hack" to fool the radio, but I am also weighting the economics of repair: a 12 lb radio will cost nearly $100 to ship round trip for repairs and the repair itself may be $200-400. So the cost could easily add to $500. One...
    6 replies | 346 view(s)
  • brandon lind's Avatar
    Thu 4th Jul 2019, 05:42
    brandon lind replied to a thread Base Radios Yaesu FT-900 with no Power output in Yaesu
    Not sure what you mean. Are you trying to drive the final inside the ft900 with an external source? If everything else on the radio still works, just no PO, I would start by testing the voltages around the final transistors (Q4004 and Q4005, both 2SC2879's), or at least test the voltage drop across the junctions when powered off to see if they are still working. Don't try to drive the ft900 final with an external rf source, the bias networks for the amplification stages only has power during TX, which is controlled by the radio. Also, I think the input for the final unit is in the mW range, not sure. I dont know how the rest of the radio will like a foreign signal being back-fed into the radio.
    6 replies | 346 view(s)
  • Louis's Avatar
    Wed 3rd Jul 2019, 11:46
    Hi HamRadioForum, I am an engineer commissioning a small satellite ground station for my university and have now come to the stage of looking at the software side of things... I have already looked into the dashboards and foxtele etc. offered by AMSAT, which look useful, however the ground station needs to be moderately simple to use in operation, therefore best not to have a huge plethora of different pieces of software for each different satellite. What I would like to know is how I might go about writing my own decoding software, to take the raw signal coming into the computer, via a sound card, from our transceiver, demodulate it, then decode the resulting demodulated binary and present it in an understandable way. for a start all we would be looking to do is decode telemetry for any satellite we can listen to, the antenna set-up being crossed Yagis on VHF and UHF. Also where might I be able to find documentation for the format of the telemetry data of each satellite, to determine how to decode it?...
    0 replies | 107 view(s)
  • AB6WP's Avatar
    Wed 3rd Jul 2019, 06:41
    AB6WP replied to a thread Base Radios Yaesu FT-900 with no Power output in Yaesu
    Tnx fer reply. Yes, the Tx/Rx relay clicks when pushing MOX, TUNE, and when Keying on CW. Also tested the functioning of the ground switch near that relay. After such a long time, the original microphone is lost so cannot test the PTT on it, but FT-900 goes into transmit if using the built-in keyer while on CW and VOX is on. Still NO PO. At present time, trying to find out how much drive to put into final ampl. Have a Norcal 40A capable of putting out 2 to 4 Watts (QRP rig). Any comments?
    6 replies | 346 view(s)
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