Explanation of VFO as one part of the the tuning variables in mixers
Jan 26, 2022 · In a superhet, the tuned frequency can be the sum (or difference) of multiple oscillators, one of them often a VFO (an oscillator variable in frequency by changing a variable capacitor, or …
What is the use of dual VFOs? - Amateur Radio Stack Exchange
Jul 29, 2020 · What is the value of more than one VFO in an HF transceiver? Many novice rigs only have a single crystal oscillator, and a vast number of famous classic transceivers, HF kits, and QRP …
diy - How to convert a crystal controlled tranceiver to VFO (aka ...
The Heathkit HW-7 offered the option of crystal or VFO control via front-panel pushbutton switch. Pierce crystal oscillator Q5 was repurposed as a buffer amplifier for use with a VFO by switching out the …
How can I key low voltage and still keep a tube VFO running ... - diy
Sep 22, 2023 · I'm interested in building a VFO based single tube CW transmitter. These devices are known to have issues with frequency drift and chirp; frequency drift can apparently be mitigated by …
ICOM IC-705 Feature Walk-Through - QRZ Forums
Sep 5, 2020 · XFC: (On most Icom hf rigs for the last 25 yrs) Primary function- hold down to adjust your TX Freq&mode (vfo A/B) during split operation. Compression (speech proc)= turn on for ssb voice Qs.
QRZ-1 Explorer, Ham Radio Review And Walkthough!!
Aug 20, 2022 · The dual VFO function is nice and I wish my Yaesu had that. And my Yaesu is a brick while this radio is lighter but still feels solid. My only nit is that scan is buried in the menus. I dont do …
Easy Instructions to use the NEW Retevis Rt-82 & TYT MD-2017
Jun 29, 2017 · Long press the "BACK" key to change Channel mode to VFO mode. Wow…is arrived the Battery Eliminator for 12V car ham-radio activity ! 73 de IW2BSF
Does the waveform of the VFO necessarily have to be sinusoidal?
Does the VFO signal necessarily have to be a sinusoid? Absolutely not. For each frequency component on a mixer's inputs, it produces at the output the sum and difference of those frequency components. …
Ailunce HD1 Dual Band DMR Amateur Radio - QRZ Forums
Aug 10, 2017 · In channel frequency mode, you can change vfo and channel mode by short press “EXIT”. Long press “Exit” will change analog and digital in vfo mode. 3. Radio ID Some hams may …
Making a VFO to Transmitter Matching Transformer | QRZ Forums
Jul 16, 2021 · Modern VFO technology, including digital signal generators, often lack enough voltage output to drive the oscillator in a tube rig. Greg Latta, AA8V demonstrates a simple, low cost way to …