4 ms·

Not buying they’re running 100,000 watts, nor much over a few kilowatts. Which, isn’t in any way acceptable for a service that limits AM to 5 watts. Splatter

by kmbfjr 3y ago

Not buying they’re running 100,000 watts, nor much over a few kilowatts. Which, isn’t in any way acceptable for a service that limits AM to 5 watts. Splatter isn’t indicative of large amounts of power, just an RF amplifier going very non-linear.

bob1029 3y ago
100kW ERP would make more sense. A transmitter that actually consumes 100kW of electricity would be a monster.
- BuildTheRobots 3y ago
  > A transmitter that actually consumes 100kW of electricity would be a monster. Before we switched to DTV from analogue, the TV transmitter tower near me was broadcasting FIVE 870kW channels. Admittedly these were between 600-700mhz and I'm not sure if that's ERP or not, but "monster" sized RF transmitters were surprisingly common.
  - bob1029 3y ago
    Oh it's common, just not something you could casually hook up in a residential setting. You'd need access to 480v/3ph service to do this realistically. Moving 100kW at residential voltages to a single device is not happening. Your wires would have to be cartoon-sized.
    - nixgeek 3y ago
      This is a 50kW AM tower in some amount of detail — https://youtu.be/Aax-ehkRTnQ?si=Hy0YklPl06XM4tfR https://youtu.be/Aax-ehkRTnQ?si=Hy0YklPl06XM4tfR
deleted 3y ago
[deleted]
cf1241290841 3y ago
Apparently this is the kind of hardware they are using. http://www.xforceamps.com/item/Straight-64Pill---Krazy-Xtreme-Duty---64KW-M-338 http://www.xforceamps.com/item/Straight-64Pill---Krazy-Xtrem... > Straight 64Pill - Krazy Xtreme Duty - 6.4KW-M > Together they can draw up to 1280amps total off your mobile. > The combined output power of the two units is +16000w PEP when supplied with enough electrical power. edit: Larger one from 10 small ones with a maximum ampere draw of 980. http://www.xforceamps.com/item/Straight-480Pill---Krazy-Xtreme-Duty---480KW-M-415 http://www.xforceamps.com/item/Straight-480Pill---Krazy-Xtre... > Straight 480Pill - Krazy Xtreme Duty - 48.0KW-M > Maximum Recommended Dead Key Output 12000w > The combined output power of the Ten units is +130000w PEP when supplied with enough electrical power. edit1: Also https://www.worldwidedx.com/threads/if-your-128-pill-amp-isnt-enough.180754/page-2 https://www.worldwidedx.com/threads/if-your-128-pill-amp-isn... >Puts 48kW amp in car, gets effective radiated signal no better than a couple of kilowatts does due to the fact the car is a crap ground plane to start with. >Someone commented that commercial AM stations are limited to a couple of kilowatts more. If you look at the antenna ground system AM stations use, there's a whole lot more metal involved than is in the body of a car. edit2: Video from a smaller car https://www.youtube.com/watch?v=aOT63GUdQDc https://www.youtube.com/watch?v=aOT63GUdQDc edit3: More specialized cars https://www.youtube.com/watch?v=daKDu6FT2Xs https://www.youtube.com/watch?v=daKDu6FT2Xs edit4: Truck that claims 60kw dead key output https://www.youtube.com/watch?v=S1YWke8cseg https://www.youtube.com/watch?v=S1YWke8cseg

by kmbfjr 3y ago

bob1029 3y ago

100kW ERP would make more sense. A transmitter that actually consumes 100kW of electricity would be a monster.

BuildTheRobots 3y ago
> A transmitter that actually consumes 100kW of electricity would be a monster. Before we switched to DTV from analogue, the TV transmitter tower near me was broadcasting FIVE 870kW channels. Admittedly these were between 600-700mhz and I'm not sure if that's ERP or not, but "monster" sized RF transmitters were surprisingly common.
- bob1029 3y ago
  Oh it's common, just not something you could casually hook up in a residential setting. You'd need access to 480v/3ph service to do this realistically. Moving 100kW at residential voltages to a single device is not happening. Your wires would have to be cartoon-sized.
  - nixgeek 3y ago
    This is a 50kW AM tower in some amount of detail — https://youtu.be/Aax-ehkRTnQ?si=Hy0YklPl06XM4tfR https://youtu.be/Aax-ehkRTnQ?si=Hy0YklPl06XM4tfR

deleted 3y ago

[deleted]

cf1241290841 3y ago

Apparently this is the kind of hardware they are using. http://www.xforceamps.com/item/Straight-64Pill---Krazy-Xtreme-Duty---64KW-M-338 http://www.xforceamps.com/item/Straight-64Pill---Krazy-Xtrem... > Straight 64Pill - Krazy Xtreme Duty - 6.4KW-M > Together they can draw up to 1280amps total off your mobile. > The combined output power of the two units is +16000w PEP when supplied with enough electrical power. edit: Larger one from 10 small ones with a maximum ampere draw of 980. http://www.xforceamps.com/item/Straight-480Pill---Krazy-Xtreme-Duty---480KW-M-415 http://www.xforceamps.com/item/Straight-480Pill---Krazy-Xtre... > Straight 480Pill - Krazy Xtreme Duty - 48.0KW-M > Maximum Recommended Dead Key Output 12000w > The combined output power of the Ten units is +130000w PEP when supplied with enough electrical power. edit1: Also https://www.worldwidedx.com/threads/if-your-128-pill-amp-isnt-enough.180754/page-2 https://www.worldwidedx.com/threads/if-your-128-pill-amp-isn... >Puts 48kW amp in car, gets effective radiated signal no better than a couple of kilowatts does due to the fact the car is a crap ground plane to start with. >Someone commented that commercial AM stations are limited to a couple of kilowatts more. If you look at the antenna ground system AM stations use, there's a whole lot more metal involved than is in the body of a car. edit2: Video from a smaller car https://www.youtube.com/watch?v=aOT63GUdQDc https://www.youtube.com/watch?v=aOT63GUdQDc edit3: More specialized cars https://www.youtube.com/watch?v=daKDu6FT2Xs https://www.youtube.com/watch?v=daKDu6FT2Xs edit4: Truck that claims 60kw dead key output https://www.youtube.com/watch?v=S1YWke8cseg https://www.youtube.com/watch?v=S1YWke8cseg