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mbrun

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mbrun last won the day on August 25

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  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

    Licensing

    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
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