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 …
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 …
hf - Can the external VFO input in a Heathkit SB- (100, 101, 102) be ...
This model radio has a 9-pin Molex connector in the back, intended to connect an external auxiliary VFO. By design, this feature is intended to support "split" operation -- listening on a …
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 …
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 …
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, …
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 …