开云体育

ctrl + shift + ? for shortcuts
© 2025 开云体育
  1. BITX20
  2. Messages
Single Messages Topics Expanded Polls

Re: A long long video on building feedback amplifiers

 

Thanks, Farhan. I was hoping an assembly manual might give info on shielding requirements and so on, plus more explanation of how it works. I was somewhat perplexed as to how square wave excitation could work without use of DSP, as in the nanoVNA for example. But I think I get it now as far as the superhet design with sharp filtering to reject the harmonic components.? It's very clever!

On the ugly FBA - I got inspired enough to give it a shot and managed to create a functional amplifier in an hour or so. I have those somewhat stringy equations from EMRFD in my "everything" excel ham workbook to assist in designing these things.

73

Nick, WA5BDU

On Tue, Sep 24, 2024 at 10:26?PM Ashhar Farhan via <farhanbox=[email protected]> wrote:

Nick, See this ?


On Wed, Sep 25, 2024, 12:24 AM Nick Kennedy via <kennnick=[email protected]> wrote:
That was a very informative video. I'm primed to try some ugly construction for the first time (more or less) since I build the Ugly Weekender back around 1999.
?
I wonder if anyone happens to have the manual for the Antduino, assuming there was one. If so, I'd love to have a copy of it.
?
73
?
Nick, WA5BDU
?
Join [email protected] to automatically receive all group messages.