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axorlov

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  1. Like
    axorlov got a reaction from WRVS497 in DC Blocker to protect SDR using Y-Cable splitter   
    DC blocker is not going to work for sure. Your radio already has this RF switch to protect it's own receiver. These switches are usually based on PIN diodes (here is more info: https://www.digikey.com/en/articles/how-and-why-to-use-pin-diodes-for-rf-switching). The practical solution would be to tap RF input for SDR after this RF switch in your radio. Search on the internet, there are solutions published for some popular radios. It may influence what are you going to buy. Below red arrow shows a good location for my radio (TK-880).

  2. Like
    axorlov got a reaction from WRWS304 in New LID Question   
    Unsightly antennas are bad. Put up only good looking antennas, the more the merrier! Your cabin will be gorgeous, and an envy of all neighbors. Your mother-in-law will be glad and will brag about your antennas on her facebook!
    That's would be tough to cover these bands with one antenna. Tri-band 6m-2m-70cm antennas do exist, but lumping 10m, 11m and 1.25m would be difficult. Antenna tuners also exist but mostly down to 6m. I'm not aware of auto-tuner for 2m and shorter. If it exists, it's going to be expensive. There are manual tuners for 2m - 70cm, but KAF6045 mentioned losses in the coax. 11m-10m-6m could be covered with one antenna, 2m-MUSR-70cm-GMRS with another, and 1.25 is an outlier. Any antenna can receive, but if you want to transmit, you likely will need a dedicated antenna for it.
  3. Haha
    axorlov got a reaction from Sshannon in New LID Question   
    Unsightly antennas are bad. Put up only good looking antennas, the more the merrier! Your cabin will be gorgeous, and an envy of all neighbors. Your mother-in-law will be glad and will brag about your antennas on her facebook!
    That's would be tough to cover these bands with one antenna. Tri-band 6m-2m-70cm antennas do exist, but lumping 10m, 11m and 1.25m would be difficult. Antenna tuners also exist but mostly down to 6m. I'm not aware of auto-tuner for 2m and shorter. If it exists, it's going to be expensive. There are manual tuners for 2m - 70cm, but KAF6045 mentioned losses in the coax. 11m-10m-6m could be covered with one antenna, 2m-MUSR-70cm-GMRS with another, and 1.25 is an outlier. Any antenna can receive, but if you want to transmit, you likely will need a dedicated antenna for it.
  4. Haha
    axorlov got a reaction from WRUU653 in New LID Question   
    Unsightly antennas are bad. Put up only good looking antennas, the more the merrier! Your cabin will be gorgeous, and an envy of all neighbors. Your mother-in-law will be glad and will brag about your antennas on her facebook!
    That's would be tough to cover these bands with one antenna. Tri-band 6m-2m-70cm antennas do exist, but lumping 10m, 11m and 1.25m would be difficult. Antenna tuners also exist but mostly down to 6m. I'm not aware of auto-tuner for 2m and shorter. If it exists, it's going to be expensive. There are manual tuners for 2m - 70cm, but KAF6045 mentioned losses in the coax. 11m-10m-6m could be covered with one antenna, 2m-MUSR-70cm-GMRS with another, and 1.25 is an outlier. Any antenna can receive, but if you want to transmit, you likely will need a dedicated antenna for it.
  5. Like
    axorlov got a reaction from AdmiralCochrane in GMRS regulations spreadsheet   
    Channel spacing and occupied bandwidth are different things. On narrowband channels, spacing is 12.5 KHz, while occupied bandwidth is usually 11 KHz and even less on some chinese radios. On wideband channels spacing is 25 kHz, while bandwidth is 20 kHz, and on many radios is actually 16 kHz. This is how interstitial channels fit (barely).
  6. Haha
    axorlov got a reaction from Bmadda in TPL vs DPL   
    You are going to answer to Motorola Coca Cola company!

  7. Like
    axorlov got a reaction from marcspaz in GMRS regulations spreadsheet   
    Channel spacing and occupied bandwidth are different things. On narrowband channels, spacing is 12.5 KHz, while occupied bandwidth is usually 11 KHz and even less on some chinese radios. On wideband channels spacing is 25 kHz, while bandwidth is 20 kHz, and on many radios is actually 16 kHz. This is how interstitial channels fit (barely).
  8. Like
    axorlov got a reaction from SteveC7010 in GMRS regulations spreadsheet   
    Channel spacing and occupied bandwidth are different things. On narrowband channels, spacing is 12.5 KHz, while occupied bandwidth is usually 11 KHz and even less on some chinese radios. On wideband channels spacing is 25 kHz, while bandwidth is 20 kHz, and on many radios is actually 16 kHz. This is how interstitial channels fit (barely).
  9. Thanks
    axorlov got a reaction from WRUU653 in GMRS regulations spreadsheet   
    Channel spacing and occupied bandwidth are different things. On narrowband channels, spacing is 12.5 KHz, while occupied bandwidth is usually 11 KHz and even less on some chinese radios. On wideband channels spacing is 25 kHz, while bandwidth is 20 kHz, and on many radios is actually 16 kHz. This is how interstitial channels fit (barely).
  10. Like
    axorlov got a reaction from wrci350 in GMRS regulations spreadsheet   
    Channel spacing and occupied bandwidth are different things. On narrowband channels, spacing is 12.5 KHz, while occupied bandwidth is usually 11 KHz and even less on some chinese radios. On wideband channels spacing is 25 kHz, while bandwidth is 20 kHz, and on many radios is actually 16 kHz. This is how interstitial channels fit (barely).
  11. Like
    axorlov got a reaction from Extreme in Any issue using DCS instead of CTCSS in Kenwood TK models   
    If it is a stable, close knit group, like a family or hunting buddies, they may have their radios set up for dense areas and for woods. And they don't want to hear any other chatter. Set up once, use forever, assign a button for a "home" channel. It is very fool-proof setup, also safe and practical to give to 5yo. It is how my family radios are set up.
    If the question is about advantages of DCS vs CTCSS, bigger pool of codes to chose from comes to mind. I can't think of other advantages.
  12. Like
    axorlov got a reaction from Extreme in Any issue using DCS instead of CTCSS in Kenwood TK models   
    Yes, called DQT in Kenwood-speak. Digital quiet talk. It also supports advanced feature Operator Selected Tone, if you program it correctly.
  13. Like
    axorlov reacted to Lscott in Motorola MTS2000 UHF   
    For those that want a PDF version see attached file.
    DPL _ DCS Squelch System.pdf
  14. Like
    axorlov got a reaction from Charliewreq466 in Motorola MTS2000 UHF   
    For some reason the original link (https://www.onfreq.com/syntorx/dcs.html) does not work, great thing we have Wayback Machine!
  15. Like
    axorlov got a reaction from Lscott in Motorola MTS2000 UHF   
    +246, +542, +653, -523, -647, -726  all are the same code. But it's unlikely Motorola will have any of them. More info here: https://web.archive.org/web/20220331074737/https://www.onfreq.com/syntorx/dcs.html
  16. Thanks
    axorlov got a reaction from Radioguy7268 in Motorola MTS2000 UHF   
    +246, +542, +653, -523, -647, -726  all are the same code. But it's unlikely Motorola will have any of them. More info here: https://web.archive.org/web/20220331074737/https://www.onfreq.com/syntorx/dcs.html
  17. Like
    axorlov got a reaction from WRUU653 in I bent my coax . . .   
    No easy/cheap way to know for sure. The very first test is to disconnect from radio and antenna and use ohm-meter to check for short between center and shield. If there is a short, coax is damaged beyond any hope. You'd need to cut off the damaged section and put new connector.
    If no short and the coax is of RG type, not an LMR type, you can try to carefully unbend it. RG has much more robust dielectric. The way to test the coax is to plug SWR/watt-meter and dummy load to the radio, and then put your coax between the radio and meter. If there is a huge difference in SWR and/or watts, coax is toasted.
  18. Like
    axorlov got a reaction from Sshannon in I bent my coax . . .   
    No easy/cheap way to know for sure. The very first test is to disconnect from radio and antenna and use ohm-meter to check for short between center and shield. If there is a short, coax is damaged beyond any hope. You'd need to cut off the damaged section and put new connector.
    If no short and the coax is of RG type, not an LMR type, you can try to carefully unbend it. RG has much more robust dielectric. The way to test the coax is to plug SWR/watt-meter and dummy load to the radio, and then put your coax between the radio and meter. If there is a huge difference in SWR and/or watts, coax is toasted.
  19. Like
    axorlov got a reaction from WRUU653 in Any issue using DCS instead of CTCSS in Kenwood TK models   
    If it is a stable, close knit group, like a family or hunting buddies, they may have their radios set up for dense areas and for woods. And they don't want to hear any other chatter. Set up once, use forever, assign a button for a "home" channel. It is very fool-proof setup, also safe and practical to give to 5yo. It is how my family radios are set up.
    If the question is about advantages of DCS vs CTCSS, bigger pool of codes to chose from comes to mind. I can't think of other advantages.
  20. Like
    axorlov got a reaction from WRUU653 in Any issue using DCS instead of CTCSS in Kenwood TK models   
    Yes, called DQT in Kenwood-speak. Digital quiet talk. It also supports advanced feature Operator Selected Tone, if you program it correctly.
  21. Like
    axorlov got a reaction from Charliewreq466 in Motorola MTS2000 UHF   
    +246, +542, +653, -523, -647, -726  all are the same code. But it's unlikely Motorola will have any of them. More info here: https://web.archive.org/web/20220331074737/https://www.onfreq.com/syntorx/dcs.html
  22. Like
    axorlov got a reaction from Sshannon in Any issue using DCS instead of CTCSS in Kenwood TK models   
    If it is a stable, close knit group, like a family or hunting buddies, they may have their radios set up for dense areas and for woods. And they don't want to hear any other chatter. Set up once, use forever, assign a button for a "home" channel. It is very fool-proof setup, also safe and practical to give to 5yo. It is how my family radios are set up.
    If the question is about advantages of DCS vs CTCSS, bigger pool of codes to chose from comes to mind. I can't think of other advantages.
  23. Like
    axorlov got a reaction from wayoverthere in Motorola MTS2000 UHF   
    +246, +542, +653, -523, -647, -726  all are the same code. But it's unlikely Motorola will have any of them. More info here: https://web.archive.org/web/20220331074737/https://www.onfreq.com/syntorx/dcs.html
  24. Haha
    axorlov got a reaction from WRUU653 in "Mobile Unit" Search   
    FTDX-101D can't do neither VHF nor UHF. It is certainly not a mobile, in a sense that it would not fit into single-DIN or double-DIN space. Try to look for 6 seconds, maybe?
  25. Like
    axorlov reacted to Lscott in Getting started!   
    I think most of us on this forum do as well. I try to remind people of the rules without being an A-Hole on the issue. People are adults and will make their own decisions, I just want to help them make an "informed" one. So long as I did what I think is the proper thing to do I let others make their decision whether I agree with it or not.
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