SolderSmoke Daily News -- Ham Radio Blog

  This one is for 20 meters (no need for 75) and will go to the Dominican Republic. 6 crystal filter at 5.2 MHz. VFO from old Yaesu FT-101 ...

  I'm not exactly sure why I pulled this old rig off the shelf, but I'll write up what I did -- I often use this blog as a kind of n...

It is really simple.  I had one of the +/- 3kHz (6 kHz wide) 455HT filters on hand.  The spec sheets call for 2000 ohms at both ends, but lo...

 https://hackaday.com/2021/08/06/sbitx-hackable-hf-sdr-for-the-raspberry-pi/

The really cool part comes at the end when I put the scope probe on the output, then on the input of the bandpass filter.  Exciting stuff my...

This is a 5.2 MHz crystal filter. I used the G3UUR method for determining the crystal's motional parameters. I then used Dishal and AA...

I continue to work on the "Mythbuster" rig,  but I am taking it slow, trying to learn something from each stage.  I'm especial...

As I said a couple of days ago, Farhan has put out a very informative video on amplifier design. During the video we can see him determin...

Farhan has produced a really excellent video explaining the theory behind the feedback amplifiers that we use in so many of our circuits....

Bill's uBITX with HB keys and the mic that used to be the podcast mic!  SolderSmoke Podcast #216 is available  21 December 2019 ...

Farhan had given me one of the early Dayton Hamvention models of the Antuino SWR/PWR/SNA RF test lab.  He later identified the need for ...

Both messages from the BITX20.io email group. 26 July 2019   Peeps: The Antuino has been in use for ove...