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HR 2510 and KL-503 to many watts

RF stands for receiving frequency it's not a variable for power that I know of

RF stands for Radio Frequency and the knob adjusts the RF power output aka the power output of the Radio Frequency being transmitted. Never, nowhere, at any time does/did RF stand for Receive frequency.
 

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  • @ BJ radionut:
    Scheduled for Jul 4, 2026 Saturday Live Streams:
    To celebrate the 250th birthday of our great nation. We are giving away not just one, but multiple antennas! The Grand prize is the CaHR-Tenna Hydra Antenna, along with several other antenna prizes that will be announced throughout the giveaway. Whether you're a new ham, portable operator, POTA activator, or an experienced HF operator, this is your chance to upgrade your station. Prizes Include: HRA Hydra Antenna (Grand Prize) Additional antennas from HRA More prizes may be added during the giveaway!
  • @ BJ radionut:
  • @ BJ radionut:
    CQ Worldwide VHF SSB/CW Contest: 1400Z, Jul 4 to 1400Z, Jul 5