Jump to content


  • Posts

  • Joined

  • Last visited

  • Days Won


Everything posted by mbrun

  1. Let’s not derail this thread. If the original poster wants to start a GMRS radio group, that is their right. If one individual is not blessed to have the discretionary resources for original equipment plus the ongoing operating and maintenance expenses for a repeater and a group of folks decide to share the expense of doing so, so be it. Michael WRHS965 KE8PLM
  2. For reference, the power draw of the XS20G’s big brother, the KG-1000G, is as follows: @Idle @5w @20w @50w Conventional wisdom is to choose/design a power system so that the steady/continuous draw of the load is no more than 80% of the power system. For the 20w setting above, this would suggest a 7.5A supply.. However, this theory does not necessarily account for power-up surges which can be high. A 1.5-2x (and more) increase in power supply system capacity can at times be required. This would suggest a supply that can handle surges 9-12A (which would explain the 15A fuse). Most power supplies include some degree of surge capacity, which may be very well be 10% and more of their continuous rating. A well designed 10A continuous rated supply therefore would, in all probability, comfortably hand surges of 11A and greater. So assuming the KG-XS20G falls into the same 6A load draw as its big brother, a 10A + continuous rated supply would seem to be of sufficient size. While smaller sizes may also work well on receive, depending upon the quality of design and internal headroom of the supply and how long your transmission are, you may experience performance gremlins that have you scratching your head when transmitting. In the end, there is nothing wrong with the manufacturer’s 15A recommended power supply. It provides a very good and responsible safety margin. It also provides some extra power available for other things when you need it. Regards. Michael WRHS965 KE8PLM
  3. Here a link to the spec sheet for standard LMR400 https://timesmicrowave.com/DataSheets/CableProducts/LMR-400.pdf. Bend radius specifications are included within. They give two ratings. A once and done installation rating and another where repeated flex will occur. Yes, you can using a different cable for jumper, but is should be a 50-ohm jumper. Use the shortest practical length that suits your application. Do not deform your cable. Do not kink it. Do not secure it so tight that shape of the cable changes. Take and record reference measurements of your antenna system (feed-line, adapters, antenna) before permanently installing anything. Make sure all is acceptable first. If all is good, then install. Take SWR measurements along the journey so you can immediately spot any issues you have caused (such as kinking or deforming cable, effect of adapters, etc…). Yes, in most cases you can leave an SWR meter in circuit. Mine remains in circuit full time. I power it up when I need or want view readings, otherwise it remains off. It continues to pass signal when no power is applied. Michael WRHS965 KE8PLM
  4. mbrun


    My personal experience over the last two years has been 10-48 hours. During that time, I have applied for license using the ULS for myself, and on behalf of some blind operators. Feel free to log back in to the FCC using your FRN number and double check your status. If a callsign appears you are golden. Check the data you entered while there to make sure it is all correct too, including your email. Michael WRHS965 KE8PLM
  5. Does anyone have a link to an audio file of what the existing data transmissions sounds like that the current legal crop of GMRS radios with location and texting data bursts produce? Michael WRHS965 KE8PLM
  6. Welcome to myGRMS. Enjoy the forum. Michael WRHS965 KE8PLM
  7. Dayton has a super high profile repeater on the 462.700 frequency. I use it when I am in town. I can also communicate through it from by base station 50 crow-miles away. The repeater owner owns a number of high-profile repeaters in the region. He is a communications professional and great guy. The owner requires a phone call from you to gain permission. Phone number is with his myGMRS listing. He has one in Cincinnati as well, but different PL. Until recently it was the highest profile in town. Michael WRHS965 KE8PLM
  8. The comet 712 is what is called a “Collinear” design antenna. A collinear antenna is an antenna that is actually comprised of multiple antenna arrayed together that, when paired they way they are, alters the overall radiation pattern and improves the effective gain. In the case of the 712, the gain of the antenna is 9dBi. Its coverage pattern is more like a disc, whereas the basic dipole antenna has coverage pattern more like a fat round donut. The most popular commercial antennas used for high-performance commercial UHF radio installations are also collinear designs. Commercial grade antenna may have reliable service lives of dozens of years. Michael WRHS965 KE8PLM
  9. Welcome to the forum @ShadetreeMechanic . Michael WRHS965 KE8PLM
  10. Thanks @IanM . I am glad you have managed to get some resemblance of useful DTMF functionality working. I will do some additional experimentation to experience the behavior first hand. I appreciate the detailed steps. Michael WRHS965 KE8PLM
  11. You’re welcome. Enjoy! Michael WRHS965 KE8PLM
  12. Glad to learn it is in writing in this case. Michael WRHS965 KE8PLM
  13. The radio should have a factory installed GMRS image already stored within it. However, there is an issue with the radio in that after a reset, the radio does not boot up into channel mode. Instead it boots up into VFO mode. That likely explains your issue. To resolve your issue, activate the Area A radio by pressing ‘Band’. Then press the #6 button 3 times. Then switch to the Area B receiver and do the same. You should be back in business. If these steps do not work, then you radio may not have been supplied with the factory GMRS image. In which case you will need to follow @Jwilkers advise. Michael WRHS965 KE8PLM
  14. I agree. In addition, a manufacturer with integrity would actually publish a maximum value the radio can safely handle, rather than hiding it in their back pocket and pulling it out when they want to deny a warranty claim. If it is not published they are then in a position to move it at will so as to always suit them. Also, a good design would include a substantial safety margin to ensure the longevity of the product under varied typical conditions. Michael WRHS965 KE8PLM
  15. As the settings affect the transmit characteristics, I adjusted them in the 905G used for Tx and observed the results on two other 905G as well as two other models of radio. Michael WRHS965 KE8PLM
  16. I did explore this, and yes indeed the Tx time per digit and interval between digits can be changed. I made a variety of changes and still experienced unreliable decoding whereas my other radios were always rock solid regardless of which of the few combinations I tried. Michael WRHS965 KE8PLM
  17. Good Day Ian. I have not been able to get any form of useful calling function operational on the KG-905G radio. While I have no current use for it, I do not like a product with menus and apparent functions that do nothing, or at least nothing useful. There seems to be a lot of that going around. The radio does have a ‘Call’ function that can be assigned to the PF1L and PF2S buttons. In the software there is a place to enter up to twenty (20) discrete 6-digit DTMF calling codes. If you enter a number into one of these twenty slots, and if that slot ID (calling code ID) happens to be assigned to the channel you are using, then pressing the corresponding PF button will cause the radio to transmit the DTMF code you entered. While this is all well and good, I have not yet found a way to get the receiving radio to do anything with that code other than reproduce its audio in the same way every other radio does. The ability to assign a calling code in the field does not seem to exist either. It appears that one has to program the code in from the software, which will not be useful in the GMRS world. My view of calling codes is that they need to be field assignable to support the needs of ever changing group outings. There are also menu options in the software for tailoring ring behavior, presumably companion settings for the calling feature functionality. I have tried different combinations in radios none of which has yielded any fruit. Maybe you will have better luck than I guessing. I think what has happened is that when the radio firmware was adapted from the radio is was based on, a lot of balls got dropped and the radio got developed only to about 60% completion. I sure would like to see a firmware upgrade for this radio because there is stuff I like about it. My previous comments regard the decoding where based on the inability of all my 905G to accurate decode DTMF signals from other radios, and the inability of the radio to accurately decode the PTT-ID/ANI-ID of even another 905G. Wouxun has also failed us by not suppling the ability to set the ID directly into the radio as is the case in many other of their models. Wouxun keeps including (theoretically) the ability to use DTMF codes as an alternative to CTCSS and DCS. Not sure anyone in the U.S. does this or will ever do this, and I have yet to test it to see if it even works. I suspect not. If it does, I imagine one would have to use the Calling Code slots present in the software and then assign them to the channels before flashing the radio. Enough for now. No good news on the calling front, but perhaps some useful insight for you. Michael WRHS965 KE8PLM
  18. Welcome to myGMRS. Within a few days after you have had your license, myGMRS should recognize it when you try to add it to your account. At that point you should gain the ability to request permission from repeater owners for access to their repeaters. Enjoy. Michael WRHS965 KE8PLM
  19. FCC rules changed disallowing the sale of multi-service radios like that. I interpret the FCC intent is to require use of separate physical radios for each communication service. Michael WRHS965 KE8PLM
  20. No, not that I am aware of. Worth exploring. Michael WRHS965 KE8PLM
  21. DTMF decoding all my KG-905G is very poor (to the point of being completely worthless), but rock solid on some other models I have. When another radio with DTMF sends out its ANI-ID/PTT-ID (usually 3-6 digits) the radio display should reflect the code it just received. Or, if the transmitting radio has DTMF buttons and sends out characters followed by #, the 905 should display them. If you have two units you can perform a test. Use the software to program two different PTT-ID codes into the radios and enable it to transmit each time you press PTT. So far the uses I have learned for DTMF include: Identification of the transmitting radio, use in some radio calling functions (to alert another radio), to control certain repeater functions, as an alternative to PL codes for opening squelch on another radio, for gaining access to a repeater, for dispatch software recognition of the radio transmitting. Michael WRHS965 KE8PLM
  22. Congratulations on getting your ham ticket. Michael WRHS965 KE8PLM
  23. Admittedly I am not familiar with your radio, but it surely sounds like you picking up interference from either a local electronic noise source or perhaps digital audio transmissions on or off frequency. You may also have a defective radio. I recently tested a radio from another manufacture that exhibited unexplained and unacceptable noises on quite a number of channels fresh out of the box. Although the radio was in-fact using the settings loaded into it from the factory, performing a factory reset resolved all of the noise issues. Michael WRHS965 KE8PLM
  24. If the cables are poorly shielded, yes, the potential exists that when transmitting you could get some leakage into your over-the-air antenna coax. I would suggest RG-6 or RG-11 quad-shielded coax for your TV coax, the same high-grade stuff that the cable TV utility should be using as drop cable to your home. The bigger issue you may have to contend with if you are thinking of putting both antennas on the same mast, is actually over-the-air leakage from your GMRS transmitter getting into your antenna. If a family member is not watching TV and/or you are not DVRing a show it may not be an issue. I have been known to mess up a recording or two while talking on the radio at my place. Michael WRHS965 KE8PLM
  25. There is nothing inherently wrong with running the coax inside the pole, be it a metal or fiberglass mast. It is really no different than running the feed line in conduit. It could make for a nice looking installation. Be aware that if the mast is collapsible you must have provisions at the bottom to evacuate excess feed-line when mast is collapsing. Different considerations are necessary if it is a tilt over. Michael WRHS965 KE8PLM
  • Create New...

Important Information

By using this site, you agree to our Terms of Use and Guidelines.