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 …
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, …
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 …
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 …
baofeng - My UV-5r doesn't transmit to Bf-888 - Amateur Radio …
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 …
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 …
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 …
Newest 'vacuum-tubes' Questions - Amateur Radio Stack Exchange
How can I key low voltage and still keep a tube VFO running constantly? I'm interested in building a VFO based single tube CW transmitter. These devices are known to have issues with …
How to handle old stuck tuning slugs? - Amateur Radio Stack …
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 …
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 …