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Bookmark or Share- What is the use of dual VFOs? - Amateur Radio Stack Exchange4 Answers. Sorted by: 4. Dual VFOs are needed for transmitting on one frequency but listening on another. The reason why this is done is nicely explained here. This is called operating "split" and it takes a certain amount of skill to work a DX operator working split and even more to operate split.
- Variable Frequency Oscillators (VFOs)Frequency conversion is covered in Chapter 11. Considering the size of most HF ham bands, a VFO needs a tuning range of at least 0.5 MHz. The higher the basic frequency of the VFO, the wider the tuning range you can achieve. ARRL handbook VFO projects have various frequencies ranging from 1.75 to 9 MHz.
- Variable-Frequency Oscillartors (VFO) - DiscoverCircuitsVariable-Frequency Oscillators circuits, schematics or diagrams free collection of links. DiscoverCircuits has 45,000+ free electronic circuits.
- Variable Frequency Oscillators (VFOs) - QRP ARCIConsidering the size of most ham bands, a VFO needs a tuning range of at least 0.5 MHz. The higher the basic frequency of the VFO, the wider the tuning range you can achieve. ARRL handbook VFO projects have various frequencies ranging from 1.75 to 9 MHz. My CW transmitter VFO ranges from 3.5 to 4.0 MHz. My receiver VFO tunes from 5.0 to 5.5 MHz. In
- Variable-frequency oscillator - WikipediaA variable frequency oscillator (VFO) in electronics is an oscillator whose frequency can be tuned (i.e., varied) over some range. It is a necessary component in any tunable radio transmitter and in receivers that works by the superheterodyne principle.
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