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  • sallisawfireman's Avatar
    Today, 00:09
    sallisawfireman started a thread TS-440s in Kenwood
    Any one have any experience with a TS-440S ?
    0 replies | 77 view(s)
  • sallisawfireman's Avatar
    Yesterday, 22:55
    sallisawfireman replied to a thread Amplifiers in Accessories
    So if a 500 watt is hooked to a base station that puts out 100 watts , what output of watts would be the outcome , sorry my terminology is correct, being new Iím just trying to learn
    2 replies | 58 view(s)
  • Mobius1's Avatar
    Yesterday, 22:34
    I've looked over the mobile radio site, but I haven't found anything on the site that pertains to anything outside the vehicle side itself. But in my case that's only half the setup. A Yagi would only work if I knew where she was going exactly, but that's rarely the case. I like the phased dipole idea, because I could focus gain on certain areas, yet still obtain omni-directional capability (If I'm understanding it correctly.). I'm trying to find more information on it, so that I could hopefully make my own. Do I connect them in parrarel? In series? I don't even know where to start! I guess I really need to hit the books... As far as power is concerned, I was wondering if the extra power would help get through some of the woods and mountainous areas. Both ends would be transmitting at 50w if I went with the tranceiver I was thinking of (The Retevis DMR mobile unit.).
    11 replies | 326 view(s)
  • camerart's Avatar
    Yesterday, 21:24
    camerart replied to a thread Tuning 40Mtr antenna in Antennas
    Hi, Thanks for the replies, especially vu2nan, and the calculation. I have spent a while using the above suggestions, and failed so far. I am trying to avoid going up ladders, and one end is under the eaves of the house. In my earlier attempts I folded the ends back and wound them back round the antenna, in case I took too much off. I was talking to someone at my Ham club, and he explained the at the ends of the antenna, shortening/lengthening effects if an end is near to a building/tree, (for example) Also, winding the ends back, as I did also affects the length in a capacitance way. First unwrap and cut the folded back sections, while checking. When I asked the question, I thought a simpler % kind f answer would give me a guide. C.
    4 replies | 189 view(s)
  • camerart's Avatar
    Yesterday, 21:08
    Hi, Just bumped into this: https://www.rtl-sdr.com/rtl_hpsdr-rtl-sdr-hpsdr-translation-server/ C.
    6 replies | 573 view(s)
  • N4CQD's Avatar
    Yesterday, 20:29
    I am looking for a Cable that will enable me to connect my Yaesu FT DX1200 to my Desktop iMAC computer. For use with RUMlogNG logging software. TIA, N4CQD
    0 replies | 77 view(s)
  • paulears's Avatar
    Yesterday, 20:00
    Ha! We have a laugh about the US loud voice technique - no offence intended - but we're quite used to folk on the HF bands who run full tilt maximum power, but can never hear the replies! As to the arrays - forget the phasing thing - the phasing harness is just the way to connect multiple antennas together so the antennas match each other and present a 50Ohm load to the transmitter. Look up things like 4 stack - or look in the amphenol-JBeam documents. For commercial VHF and UHF, you stack 4 dipoles above each other. You can choose to mount them at 90 degrees to each other which produces a pretty even omnidirectional pattern in the horizontal plane - that is what you see viewed from above, but is a Vertically Polarised signal, for mobile antennas and hand-helds. WZ7U's idea of a vertical beam could be attractive, if you know where the distant station will be. Mount a yagi (a dipole, with added directors in front and a reflector behind) on a rotator, and you can quite easily get 10dB gain over a dipole -...
    11 replies | 326 view(s)
  • N4CQD's Avatar
    Yesterday, 19:30
    N4CQD started a thread Base Radios Problem: Yaesu FT DX 1200 in Yaesu
    I just received my new Yaesu FT DX 1200, hooked it up to power, it lit up just fine. However, NONE of the buttons on the front panel of the radio respond. The Tuning Knob works, but nothing else on the front panel. Someone PLEASE tell me how to get this radio to work... I really don't want to pack it up and send it back... Tnx in advance, N4CQD Problem solved!
    0 replies | 64 view(s)
  • AndyG0CCX's Avatar
    Yesterday, 19:28
    AndyG0CCX replied to a thread Amplifiers in Accessories
    Firstly, we don't usually talk about an amp or a radio putting out 'amps'. Power is measured in watts. To answer your question - no, it would not. There would be no point in doing that. That 100 watt amp would not be looking for a 100 watt input but something rather less, maybe 10 watts or so. You would more likely run a 100W radio into something like a 500 or 1000W amplifier - where it's legal to do so.
    2 replies | 58 view(s)
  • EA7HG's Avatar
    Yesterday, 18:26
    Visual Rotor is a software create for Arduino Mega 2560, with TFT touch-screen of 4.3 ď WQVGA de 480*272 and micro SD memory card, that allows to handle almost any rotor that exists in the market in an easy and intuitive way ,adding some functions such as communication port RS232 serial or USB, supporting the protocol of Prosistel so it can be governed from a PC, voice function for the blind, change of course from the screen, start / stop ramp, etc. Visual Rotor is fully updatable by software and has been developed in 6 languages: Spanish, English, French, German, Italian and Portuguese. It allows the use of up to four rotors, being able to define all the parameters according to the rotor model used. You can choose between Azimuth and Elevation , If you want to start and stop smoothly, if the rotor allows rotation of more than 360 degrees, if the center of the rotor is North or South, etc . It is easy to install inside the rotor control and simple to calibrate, you only need to indicate the left stop...
    0 replies | 25 view(s)
  • sallisawfireman's Avatar
    Yesterday, 17:25
    sallisawfireman started a thread Amplifiers in Accessories
    As a newby ,when adding an amplifier as an example,radio puts out 100 amps and if a 100 amp amplifier is added , does this combo give a total of 200 amps ?
    2 replies | 58 view(s)
  • wbreslin951's Avatar
    Yesterday, 14:21
    Hey guys! I recently acquired this c band dish for free (it was a bear getting it loaded in my truck!) I was hoping someone on here might be able to guide me in the right direction as to where to find some documentation on it. I have no idea who manufactured it, what model, etc. I'd like to get my hands on a data sheet and maybe a parts list in case I end up having to replace anything on the motor assembly. I will be using it for radio astronomy
    0 replies | 68 view(s)
  • WZ7U's Avatar
    Yesterday, 08:34
    WZ7U replied to a thread Base Radios Icom 745 - No reception on CW Mode in Icom
    Possibly if there is no CW filter installed and the filter is selected, the audio chain would be broken at that point. Check if the narrow filter button is activated. If so, turn it off. That would be the easy fix.
    1 replies | 78 view(s)
  • WZ7U's Avatar
    Yesterday, 08:32
    WZ7U replied to a thread Base Radios Icom 746 Pro problem? Please help... in Icom
    OK. There is a strong possibility a menu setting is askew. Or simply a bad connection in the hardware. Or it could be as complicated as a relay failure in the PA. Anybody have experience with a 746 Pro? I have never owned one myself, but there must be a You Tube out there about this. Sorry, but all I have left would be to try a search engine query about a 746 no transmit, or such. Sorry I can't be more help for you. :distress:
    3 replies | 126 view(s)
  • WZ7U's Avatar
    Yesterday, 08:26
    WZ7U replied to a thread Hello to the Group in Introduce yourself
    Welcome in, glad you could make it. Most here are very helpful to new comers, so fear not the "silly" question. Congratulations David! Get the General, it will expand the possibilities. 73!
    3 replies | 127 view(s)
  • WZ7U's Avatar
    Yesterday, 08:22
    Mount a beam at home in the vertical plane so the energy will be more in phase with the energy from the vehicle, since most car antennas are vertical. Horizontal polarization is good for SSB or CW signals, home to home/field. You will need a way to turn the home antenna for maximum gain towards your spouse, lots to consider here. 50 watts is a good power level, better than 10 for use in hilly terrain. Look here for mobile ideas - https://k0bg.com/
    11 replies | 326 view(s)
  • BJS's Avatar
    Fri 19th Oct 2018, 22:26
    BJS started a thread R F I Problems in Activity Forum
    Recently moved and setting up my antennas and equipment. At this point looking at the HF bands. I have major RFI from a shop fairly close by. The noise is coming from their T-5 fluorescence lighting fixtures. When they are off my noise is down about S-1. Turn the lights on and the S meter immediately jumps to S-8 & 9. Tried disconnecting the lights from the main power system and running them off of an inverter in my PU. Everything totally isolated. No help, so it appears the RFI is being broad-casted rather than being carried along the power lines. Now what? ? ? Looking for ideas suggestions, and what has worked for others. Thank You
    0 replies | 82 view(s)
  • Mobius1's Avatar
    Fri 19th Oct 2018, 15:10
    Well, if 10w got the job done, I could just connect the antennas to the HT's I planned on getting. The AiLunce HD1 is 10w, and from what I've seen from tests, it is true to that wattage at high power. If that could get me by for now, that would be nice. I'd still want to get tranceivers eventually, but at least getting the wife on board initially would be easier! If I understanding this correctly, the horizontal beam pattern matters, since that is where the gain is focused, and that's where I'll be transmitting to and receiving from, so my signal vertically isn't so important? Does anyone know of a good site that compares radiation patterns of antenna types? And as far as the phased dipoles go - What would be the advantage of that over say, an omni-directional array of yagi antennas? Is it just a matter of size? I'm still interested in the IsoPole antenna, but I can find very little info about them, other than a few people claiming they are amazing. I even did a search on these forums and not...
    11 replies | 326 view(s)
  • paulears's Avatar
    Fri 19th Oct 2018, 14:02
    paulears replied to a thread Tuning 40Mtr antenna in Antennas
    I concur - never been able to make measurements reflect what you get in practice!
    4 replies | 189 view(s)
  • paulears's Avatar
    Fri 19th Oct 2018, 14:01
    No - there's a small difference in the horizontal radiation pattern between the J Pole variations and a dipole - but they have no practical gain. 5/8th antennas are either assumed to have gain (typically a 3dB figure) but others claim they don't. Probably the best solution if you want gain is a phased stack of two or 4 dipoles - in fact, assuming you need more gain in one direction rather than a perfect omnidirectional pattern, you can stack 4 dipoles on one side of a mast and get a squished omnidirectional pattern, favouring a certain direction - 6dB gain over the single dipole is possible. Colinear antennas, containing multiple elements that are only modestly long might get you 4.5dB or so gain over a dipole - which is the standard all antennas are judged against. I can't see much point going much of around 10-20W because it's two way. No point in them being able to hear you with your loud voice when you can't hear their weak one. 10W seems to be to me balanced - , and perhaps even a bit much compared with...
    11 replies | 326 view(s)
  • Obed's Avatar
    Fri 19th Oct 2018, 11:04
    Obed replied to a thread Hello to the Group in Introduce yourself
    welcome to the hobby and the forum. Have fun.
    3 replies | 127 view(s)
  • pmh's Avatar
    Fri 19th Oct 2018, 07:53
    pmh replied to a thread Hello to the Group in Introduce yourself
    Hello, Welcome to the forum, and congratulations on your exam pass. 2m has different levels of popularity, dependant upon location, but is certainly a usefu band. Pity it is under utilised in some areas. Once you move up the levels, and try HF, the world is your oyster. Kind regards,
    3 replies | 127 view(s)
  • KI5BUC's Avatar
    Fri 19th Oct 2018, 02:41
    Hello everyone. Just wanted to say hi. Just passed my tech exam a couple of weeks ago. Probably going to take the general this weekend. Been talking a little on an HT on a local 2m repeater, but I am looking to get a 2m mobile set up in my car soon and a base station at home. The end goal is to get my wife licensed as well and have radio as a back up communication plan. I spend a lot of time on the road with my job and I would feel safer knowing that I had a second way to get a signal home. Plus there's a fun community around it all that I can't believe I've never been a part of. I'm also a big fan of RC and I'm looking forward to finding out what kinds of new things I can do with that now that I'm licensed. Anyways, just wanted to drop in and introduce myself. 73 KI5BUC
    3 replies | 127 view(s)
  • N4CQD's Avatar
    Thu 18th Oct 2018, 20:26
    N4CQD replied to a thread Base Radios Icom 746 Pro problem? Please help... in Icom
    Did a Reset on the transceiver, still no Tx.
    3 replies | 126 view(s)
  • N4CQD's Avatar
    Thu 18th Oct 2018, 20:24
    N4CQD started a thread Base Radios Icom 745 - No reception on CW Mode in Icom
    I have an old Icom 745 as a backup rig. Using it today on 20 Meters, FB on SSB, however, when I go to CW frequencies, there is NO reception with transceiver set to CW Mode. I confirmed on another transceiver, that there are CW stations working in the 20 Meter CW portion of the band. Any suggestions? TIA Doug N4CQD
    1 replies | 78 view(s)
  • Mobius1's Avatar
    Thu 18th Oct 2018, 17:06
    Thanks for the links! I can't wait to get a radio and compare the predicted results with real world results. I've been doing a lot of reading on 2 meter antennas, and if there's one thing I've learned, height is king, and what is "best" is highly subjective. At the moment I am focusing more on my base antenna, since that's what I need to get built before winter (Or at least I hope to.). At this point, I've decided that mounting from my second story is probably the better choice, based on what I feel comfortable doing at this time. With a mast, I could get some pretty significant height. From what I understand (and please correct me if I am wrong!), for my simplex situation, gain is really going to make a difference. If I understand correctly, J Pole antennas have 0 gain, and dipoles just a little bit of gain? I see a lot of recommendations on the web for Collinear antennas (The Ringo Ranger seems to come up a lot.), which seem to have great gain. But I also was wondering if an IsoPole antenna could be...
    11 replies | 326 view(s)
  • vu2nan's Avatar
    Thu 18th Oct 2018, 15:25
    vu2nan replied to a thread Tuning 40Mtr antenna in Antennas
    Hi OM Camerart, Measure actual length on one side (assuming both sides are equal!) = L Length to be trimmed on each side = L x It would be wise to follow Obed's advice - 'a little bit at a time'! Repeat the process till you get the lowest SWR at 7.1 MHz.
    4 replies | 189 view(s)
  • Obed's Avatar
    Thu 18th Oct 2018, 11:03
    Obed replied to a thread Tuning 40Mtr antenna in Antennas
    a little bit at a time.
    4 replies | 189 view(s)
  • camerart's Avatar
    Thu 18th Oct 2018, 10:50
    camerart started a thread Tuning 40Mtr antenna in Antennas
    Hi, My 40 MTR dipole antenna, tunes to a low SWR at 6.66MHz. How much should I shorten each end to tune to 7.1MHz please? Camerart
    4 replies | 189 view(s)
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