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 …
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 …
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 to reduce VFO sensitivity to the hand capacitance?
Sep 20, 2021 · Which part of the variable capacitor is grounded? I think I vaguely recall that in old valve-based literature it was recommended to ground the rotating part for minimising or avoiding hand …
baofeng - My UV-5r doesn't transmit to Bf-888 - Amateur Radio Stack ...
Aug 31, 2024 · Screenshots are hard to read. Dumps from chirp tell us nothing about the state of the radio. These chirp dumps are not even slightly similar, so I don't see why you think they would work …
QYT KT-8900D programming 70cm - Amateur Radio Stack Exchange
Nov 20, 2024 · But for 70cm no shift, not tone is stored. For example: 439.225 / 431.625 tone 88.5 with 12.5kHz In VFO Mode, the 70cm repeater works. Has anybody had this issue? I have ordered …
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 …
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 …
How to handle old stuck tuning slugs? - Amateur Radio Stack Exchange
Feb 7, 2022 · My Swan 350 radio has tuning slugs in the VFO to handle different bands. The 10-meter band has a slug that wont come out, I may need to use a longer wrench but these old slugs break …