![Short-distance Tx80-b 80-meter Band (3.5mhz Frequency Band) Radio Signal Source - Air Conditioner Parts - AliExpress Short-distance Tx80-b 80-meter Band (3.5mhz Frequency Band) Radio Signal Source - Air Conditioner Parts - AliExpress](https://ae01.alicdn.com/kf/Hf8f4ea988a714df09570b3b8c16ea4ecP.jpg_640x640Q90.jpg_.webp)
Short-distance Tx80-b 80-meter Band (3.5mhz Frequency Band) Radio Signal Source - Air Conditioner Parts - AliExpress
![QST . found on thelower frequencies. The entire dial covers 350 kc, giving plenty ofbandspread. (Two crystals are required in theh.f. oscillator to cover all of the c.w. portion ofthe 80-meter QST . found on thelower frequencies. The entire dial covers 350 kc, giving plenty ofbandspread. (Two crystals are required in theh.f. oscillator to cover all of the c.w. portion ofthe 80-meter](https://c8.alamy.com/comp/2CRN9BN/qst-found-on-thelower-frequencies-the-entire-dial-covers-350-kc-giving-plenty-ofbandspread-two-crystals-are-required-in-thehf-oscillator-to-cover-all-of-the-cw-portion-ofthe-80-meter-band-by-using-a-350-kc-crystal-in-the-hf-oscillatorto-cover-the-75-meter-phone-band-a-dial-readingof-500-kc-is-4000-kc-450-kc-is-3950-kc-and-soon-the-calibration-will-stay-put-indefinitely-the-automatic-noise-limiter-was-added-atlittle-additional-labor-or-expense-it-will-jdrove-when-it-was-first-tested-on-a-long-wire-an-tenna-this-receiver-had-rather-high-image-re-sponse-however-when-2CRN9BN.jpg)
QST . found on thelower frequencies. The entire dial covers 350 kc, giving plenty ofbandspread. (Two crystals are required in theh.f. oscillator to cover all of the c.w. portion ofthe 80-meter
![Not a Ham yet, but questions about HF frequencies? Use, etc? - Amateur Radio (Ham) - myGMRS.com Forums Not a Ham yet, but questions about HF frequencies? Use, etc? - Amateur Radio (Ham) - myGMRS.com Forums](https://files.mygmrs.com/forums/monthly_2023_11/Frequencies.jpg.a4e7f2be5708e030c10b3e347f25f403.jpg)