Just go to http://soldersmoke.com. On that archive page, just click on the blue hyperlinks and your audio player should play that episode.
http://soldersmoke.com
I really like the way Lex PH2LB measures and demonstrates the effectiveness of the Hi-Per-Mite CW filter designed by David Cripes NM0S. Watch the short video above. The blue trace is the audio input to the filter, the orange trace is the output. Watch the output change as Lex sweeps the audio frequency range. He wrote: After studying the schematic I shifting through my spare parts stock to collected the components and build one according there design on a breadboard (I changed the center frequency from 700 to 600Hz). I hooked up my signal generator with a amplitude of 2v max and sweeped it from 250Hz to 2KHz looking at the output on my rigol osciloscoop. On 2khz VMAX=0.04V, 885Hz=0.2V, 700Hz=1.5V, 662-585Hz=2V, 400Hz=0.2V, 500Hz=0.9V, 250Hz=0.04V. So a nice flat top between 585Hz to 662Hz. A full description of Lex's project (with more videos) is here: https://www.ph2lb.nl/blog/index.php?page=ubitx-mods3#ubitx-mod14 Lex's Knack Story and the intro to his blog is here: https://www.ph2lb.nl/blog/index.php?page=history
Crystal Radios • Re: School Challenge
-
If I were building this I might ditch the air core coil for a ferrite core
one, the q will be much higher, if you get a ferrite rod from an old
transistor ...
Instrument storage boxes
-
While getting some equipment off a shelf I knocked some thing down and they
landed on a nanoVNA, cracking the screen.
I think it is time to make some ...
2021 - The Year of Nostalgia. A 60 Year Trip
-
A 60 Year Time Trip!
Starting with Today -- The N6QW Conversion of the Dentron Scout HF SSB.
2/24/2021 ---- Update on Progress.
The interesting part abou...
Hunting For NDBs In CLE265
-
*WC - 332 White Rock, BC*
It's almost* CLE* time once again! '*CLE*'s are '*C*o-ordinated *L*istening
*E*vents, and NDB DXers around the world focus...
A Personal Milestone: Published on Paper
-
As far back as I can remember, I have had a fondness for words and
language. Even in the second grade, learning the roots of words, their
suffixes and pr...
Mt Feathertop (VK3/VE-002) 11th Jan 2021
-
Mt Feathertop (1,922 meters) is the second highest mountain in south
eastern Australia (Victoria), and according to many commentators, the most
picturesque...
Yet more new AVRs
-
In a previous blog I mentioned the new atmega4809 and AVR128DA parts. Well,
it seems I missed two other new families, the AVR128DB and AVR128DD series.
I’v...
Re-engineering my 1st “Shirt-pocket” transceiver
-
When the project of building a very small transceiver was accomplished 4
years ago, I still lacked lots of skills in setting up electronic circuits
using S...
The Complete DXer
-
Odds are that, if you're reading this, you're probably familiar with two
other jewels from the ARRL bookstore: *Solid State Design For The Radio
Amateur...
-
A Simple Speech Processor
(For QRP/SSB Homebrew Transceivers )
Over the last few weeks I had been thinking to build a small AF speech
processor to add to...
Modifications to the Dayton/FDIM-2019 Antuino
-
The Dayton Antuino has sub-optimal performance. This is a short note on
improving it to an 80 db range of measurements. The trouble with Antuino
2.0 (the o...
A New Look for your uBitx!
-
Adding a "Cool Blue" Display to your uBitx!
The standard "green background" with black lettering frequently reminds me
that I suffer from Chronic seasicknes...
No comments:
Post a Comment