Showing posts with label regen. Show all posts
Showing posts with label regen. Show all posts
Wednesday, May 25, 2022

HF Bandsweep with the Hammarlund HQ-100 (video)

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It has been a while since we last did a bandsweep.  Too long.  Here is one using my recently fixed up Hammarlund HQ-100.  Repair details are...
Friday, May 6, 2022

Working On My Old Hammarlund HQ-100 (Part 1)

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I like this old receiver, with all its shortcomings.  I picked it up in the Dominican Republic in 1993 or 1994.  I've been using it on A...
Thursday, November 11, 2021

Scott WA9WFA's Beautiful HBR-13 Receiver (3 videos)

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This is Scott WA9WFA's first homebrew construction project.  He did an amazing job on a very complex project:  a 13 tube superhet receiv...
1 comment:
Wednesday, October 20, 2021

Super-Regeneration is Super-Strange

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Farhan VU2ESE is largely responsible for this.  He has recently been talking about VHF.  (More about this in due course.).  This started me ...
6 comments:
Friday, October 4, 2019

Single Transistor Transceiver On the Air

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I got my version of the ET-1 transceiver working.  As I described in previous posts, I first got the transmitter and the receiver worki...
4 comments:
Monday, August 26, 2019

Single Transistor Regen Has QSO Potential (Video)

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In my previous blog post I'd expressed skepticism about using a single transistor regen on the air.  But over the years I've learn...
1 comment:
Wednesday, August 21, 2019

Another Bout of Minimalist Regen Madness

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My success with the Fish Soup 10 QRPp transceiver got me interested in further minimalization.  About ten years ago I built a rig presente...
6 comments:
Saturday, February 17, 2018

KD4PBJ's Acorn AM Broadcast Band Regen

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From Chris, KD4PBJ:  This is my AM band regen I built during December and early January.  It uses a 955 acorn tube and is a rea...
2 comments:
Sunday, April 9, 2017

Video of a REAL Homebrew QRP Contact (by WU2D)

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I think Mike's video does a good job of showing what it is really like to get on the air with simple, homebrew QRP gear.   It takes so...
1 comment:
Saturday, October 24, 2015

German Thermatron Homebrew

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Michael DF2OK has been melting solder in Germany.  Above is a short video of the first sounds made by an AC-1 replica he built.   Michael ...
Wednesday, September 16, 2015

AA7EE's Beautiful Sproutie MK II

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  This is almost too much.  Sensory overload is a real risk here.  Go check out AA7EE's amazingly beautiful regen receiver .  On ...
Friday, September 19, 2014

Long Delayed Echo on Radio China International

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Several people have e-mailed me suggesting that the weird echo I have been hearing on shortwave broadcast stations is in fact one of the f...
1 comment:
Saturday, September 13, 2014

SolderSmoke Podcast #165 Arduinos!

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SolderSmoke Podcast #165 is available:  http://soldersmoke.com/soldersmoke165.mp3 September 13, 2014 Workbench Update:  Bill's...
6 comments:
Friday, September 12, 2014

Schematic for "Off the Shelf" Regen

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NOTE (May 2024) The eagle eye of Walter  KA4KXX spotted an error in this schematic.  The source resistor in the MPF-102 stage should be aro...
6 comments:
Thursday, September 11, 2014

Shortwave Echo Mystery on Yet Another SW Station. What is this?

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A few weeks ago I noticed a strange echo on Radio China International's signal.  If you scroll down a bit you can see my YouTube recor...
3 comments: