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  1. ATCTech

    Companies that make professional level ATC 118-137 Mhz antennas

    This is probably the 100-400 MHz discone you mentioned above: https://antennaproducts.com/product/bcv-116m/
  2. ATCTech

    Companies that make professional level ATC 118-137 Mhz antennas

    DPV is another that I neglected to mention to you in our exchange of a few days ago. https://antennaproducts.com/product-category/dpv/
  3. ATCTech

    Bell FleetNet listed twice

    Take a look at the Peel County database (for example). It's there twice in succession. Twice as nice! I don't remember seeing it as recently as last night myself. But I am getting old and blind.... Bob
  4. ATCTech

    Bell FleetNet - Ontario Provincial Government Zone 1

    ...and Niagara Falls, or is it Saint Catharines, or whatever they call it.
  5. ATCTech

    Woodlawn tower

    No comment. (Saw that happen too... ;) )
  6. ATCTech

    Bell FleetNet - Ontario Provincial Government Zone 1

    On the Fonthill tower I'm currently hear Burlington OPP using T/G 8672 (OPS39) and MNR on their OPS 3, T/G 2800. Pretty quiet day for radio activity other than EMS otherwise.
  7. ATCTech

    Woodlawn tower

    Far from the first transmitter operating at 100% duty cycle to fail due to overtemp. I've been there, done that, many times. It can be a simple as the exhaust fan louvers on the equipment shelter failing to open under thermostatic control. The always-on stuff failing first is nearly always the...
  8. ATCTech

    ZOB Hi alt freqs.

    Thanks! Bob
  9. ATCTech

    ZOB Hi alt freqs.

    Hi alcahuete, Just curious, do you mean most sectors operate different frequencies at different sites (very common here too) or are you guys using equipment to operate the same frequency from multiple sites simultaneously? We do the latter around Hudson Bay here in Canada to cover a huge body...
  10. ATCTech

    ZOB Hi alt freqs.

    I had the opportunity to provide a tour to a group of FAA techs at CZYZ back in the 1980s. Even then our 1970s-designed Rockwell-Collins voice switch, which was RF FDM (300 RF channels, SSB, between about 7 and 10.7 MHz) that ran on 75 Ohm coax cable blew their minds. We had a whopping 32kB of...
  11. ATCTech

    ZOB Hi alt freqs.

    I'd take credit on NAV Canada's behalf but it's in part an Austrian-designed system. Google "Frequentis". The FAA buys from them too.
  12. ATCTech

    ZOB Hi alt freqs.

    Reference multiple RCAG sites not able to be crossed-coupled, I can think of one possible technical reason that our system already takes into account. I won't go into the entire description here but it has to do with another discussion in this forum about "PTT delay" between different RCAG...
  13. ATCTech

    ZOB Hi alt freqs.

    I'm not really certain what the question about acting as a "repeater" specifically refers to. In a positive control ATC environment, there's no requirement for aircraft to communicate with each other on ATC frequencies. Cross-coupling does in effect create a repeater though, so you are correct...
  14. ATCTech

    ZOB Hi alt freqs.

    BTW, if XC does mean Cross-coupled I wonder if "SC" means simulcast, meaning same controller but no coupling.
  15. ATCTech

    ZOB Hi alt freqs.

    Cross-coupling has been around in our systems since the 1980s. It allows multiple, ATC-selected combinations of frequencies in that specialty to "rebroadcast" to the other coupled frequencies assigned to the specialty so aircraft that need to be on geographically distanced PALS (RCAGs in...
  16. ATCTech

    Some Mississauga Unknowns

    That's what I'm seeing out here, CC13 and presumed to be the system noted in the previous post.
  17. ATCTech

    Peel Police Talkgroups

    Ahh geez, and here I am sifting through my old XML files from 2015! :rolleyes: (I do have the data right here though!)
  18. ATCTech

    Peel Police Talkgroups

    Old as in pre-P25 system?
  19. ATCTech

    ARTCC Microwave Towers

    AI7PM, that's an excellent summary and closely resembles what we did here in Canada over a couple of decades. And you're spot-on, rural farmer's fields, mountain tops and in our case Arctic tundra aren't particularly fiber-friendly or even reliable copper-pair places. We're using satellite in...
  20. ATCTech

    Ontario Public Safety before trunking

    That's the one radio that never appeared in the regular catalog. I was with Radio Shack from late 1977 to 1982 and we never had one in the store. For the masses that may not know that model, here it is: RadioPics Database - RadioShack/Realistic - COMP-100
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