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Search results

  1. freecell

    Which mobile antenna would you choose for distance?

    3M aluminum foil adhesive backed tape in a 2 - 2.5 inch width can be used to lay out a ground plane grid either underneath or on the top of the fiberglas roof. i make it a rule to avoid side panel and bumper mounts. antennas don't perform well when the body running away from the base of the...
  2. freecell

    Which mobile antenna would you choose for distance?

    the one with the least amount of loss and the highest radiation efficiency. • Physical antenna length = 45° (λ/8) • L = 1.37 meters • Design frequency = 27.205 MHz. • Ground-system loss resistance = 15 Ω. Quarter-wave full size (reference values): Rrad = 36 Ω Rground = 15 Ω Rant loss = 0 Ω...
  3. freecell

    welcome to the forum.

    welcome to the forum.
  4. freecell

    Top loaded whip vs. base loaded antenna

    • Physical antenna length = 45° (λ/8) • L = 1.37 meters • Design frequency = 27.205 MHz. • Ground-system loss resistance = 15 Ω. Quarter-wave full size (reference values): Rrad = 36 Ω Rground = 15 Ω Rant loss = 0 Ω Zfeed = 51 Ω Eff = 71% Loss = 1.5 dB Top-loaded vertical...
  5. freecell

    Northstar's hot August 36LSB Contest.

    realtime hf propagation prediction https://duckduckgo.com/?q=hf+propagation+prediction&t=h_&ia=web high levels of solar x-ray activity are ionizing the d-layer causing attenuation and absorption of hf signals and preventing them from reaching the f1 and f2 layers necessary for long distance hf...
  6. freecell

    Why people are not using FM on CB in States?

    4. Section 95.967 is amended by revising paragraph (a) to read as follows: § 95.967 CBRS transmitter power limits. * * * * * (a) When transmitting amplitude modulated (AM) voice signals or frequency modulated (FM) voice signals, the mean carrier power must not exceed 4 Watts. * * * * * 5...
  7. freecell

    HR2510 Increase Output.?

    find the am power control and set the unmodulated carrier for +or- 6.25 watts. there's nothing seriously wrong with the transmitter. those power levels are near perfect for driving a 4 transistor amplifier.
  8. freecell

    Call channel for FM, on the legal channels?

    maximum deviation limit is controlled by the transmitter. 6. Section 95.973 is amended by revising paragraph (a) to read as follows: § 95.973 CBRS authorized bandwidth. * * * * * (a) AM and FM. The "authorized bandwidth" for emission types A3E and F3E is 8 kHz. * * * * * same as + or - 4 khz...
  9. freecell

    Realistic TRC-427 Audio Mod 'GoldFinger'

    "People can’t hear sounds < 20 Hz and > 10,000 Hz very well. If you turn up the volume on your device to compensate, you could expose yourself to harmful sound levels and your speakers to harmful currents. To be safe, note the volume level that allows you to listen to a 1,000 Hz tone without...
  10. freecell

    Base Top 10 States

    just ask mmm. but hey, that was a sixteen element linear phased array (yagi-beam) on a 117 foot boom. he'll probably never lose that tower buried in a base of 15 cubic yards of concrete.
  11. freecell

    4.7UH Surface mount inductor question with picture.

    http://www.rigpix.com/rs-realistic/radioshack_htx10_service.pdf
  12. freecell

    Base Top 10 States

    even in the top ten states you should always be ready to put the big antenna into stationkeeping and lower the support structure when dangerous weather approaches.
  13. freecell

    Base Top 10 States

    Winter Temperature Averages for Every State. https://www.currentresults.com/Weather/US/average-state-temperatures-in-winter.php
  14. freecell

    Base Top 10 States

    they receive a lot of sunlight during the winter, it's hard on the ice.
  15. freecell

    4.7UH Surface mount inductor question with picture.

    electret condenser microphones require a small external voltage source and this is usually provided by the radio through the mic line. the only "stock" mic. that will work on that radio is the one supplied with the radio or another electret condenser mic, wired for an htx-10. there are two 4.7...
  16. freecell

    Seeking Schematic for SuperStar SS-3000HP

    check out these search engine results. https://duckduckgo.com/?q=Schematic+for+SuperStar+SS-3000HP&t=h_&ia=web https://www.worldwidedx.com/threads/need-info-on-a-ss3000hp-w-300010a-pcb.25440/ https://www.worldwidedx.com/threads/looking-for-information-ss-3000hp-ept300010a-board.201946/ receive...
  17. freecell

    check out these search engine results...

    check out these search engine results. https://duckduckgo.com/?q=Schematic+for+SuperStar+SS-3000HP&t=h_&ia=web
  18. freecell

    Base Top 10 States

    is freezing rain and ice loading up your favorite directional antenna in the winter? here are the top ten states where this will be much less of a problem, although you may still have to contend with some blowing winds. better one than both. .#1. hawaii .#2. arizona .#3. california .#4...