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
My Best Homebrew Rig!
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*Update May 27th,2022 ~ My Best Homebrew Rig.*
Making such a determination is like asking which is your best child. THEY
are all good but some shine lik...
Xiegu G106 preliminary specifications and features
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Xiegu distributor, Radioddity, has now publicly announced a product page
for the new Xiegu G106. No pricing/availability mentioned, but we do learn
a few m...
Hunting For NDBs in CLE280
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It's CLE time once again. This is a challenge for all newcomers to NDB
listening and the ultimate test of your *medium frequency receiving
capabiliti...
HRWB 155 - General Q&A with Troy K4JDA
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In this episode, we do a round of "what's on your workbench?" Then we get
into a set of questions from our guest Troy K4JDA who asks about our
approach t...
QRP Labs QDX Rev 3 is here… all 2000 of them!
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Yep, get your wallet ready: The QDX Rev 3 is here. And there’s more. There
are shirts, a hat, a mug, and more. Check it out in the video below:
The post ...
VWS Direct Conversion Receiver Project
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I have been working on several projects, most of them not related to
electronics. The main electronic related one has made me look back on some
code I w...
Arduino Clock
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Initial code using a 120x120 TFT display and a realtime clock module.
/*************************************************************************...
QLG2-SE GNSS/GPS Receiver kit
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This GNSS/GPS receiver module kit is mostly SMD (pre-assembled), and
includes a high sensitivity active antenna with 2m coax and SMA connectors.
It has ...
More Projects with Telegram
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*In the past years I had always blogged my projects, but due to time,
effort and format I had stopped doing that. But my projects continued,
and I have ...
Pocket-sized homebrew 40m CW QRPp/QRP transceiver
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I built the receiver up stage by stage. First, the Band Pass Filter, based
on the QRPLabs design. It tuned up as expected. Then the BF960 RF amp.
Then, wit...
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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
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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!
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Adding a "Cool Blue" Display to your uBitx!
The standard "green background" with black lettering frequently reminds me
that I suffer from Chronic seasicknes...
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