Wednesday, May 29, 2024

2014 "Off the Shelf" Regen Comes Off the Shelf (Two Videos)

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Walter KA4KXX spotted an error in the schematic of my 2014 "Off the Shelf" regen receiver: The source resistor on the MPF-102 sho...
1 comment:
Monday, May 27, 2024

Ham Radio in China -- Interesting info from 高大伟 David Cowhig

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Chinese Radio Licenses and Operating Certificates David Cowhig (aka WA1LBP,  aka Gao Da Wei) was Hambassdor for 73 Magazine on Okinawa when ...
Sunday, May 26, 2024

A Really Cool Homebrew Computer

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Wow, very cool.  On Hack-A-Day this morning: https://hackaday.com/2024/05/26/homebrew-computer-from-the-ground-up/ It caught my eye because ...
1 comment:
Saturday, May 25, 2024

Pete Juliano's Amazing Videos -- 318 of Them!

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Blogs come and go, but (hopefully) YouTube is more permanent and accessible.  This morning I re-found Pete N6QW's YouTube channel.  When...
3 comments:
Friday, May 24, 2024

Version II of 15-10 Rig -- Updates on Bal Mod, AF amp, and RF Amp, DX

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Version II of the 15-10 rig is mostly done. I did a lot of work on the AF amp, balanced modulator, Mic amp, carrier oscillator, and filter....
1 comment:
Thursday, May 23, 2024

Charlie ZL2CTM's New Receiver

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It is truly a thing of beauty.   I really like that variable capacitor.  (Where did that come from?  How can I get one?)    Charlie's ca...
1 comment:
Wednesday, May 22, 2024

Rigs on Vertical Boards -- Then and Now

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  I saw this on Facebook today.  G1AVQ (SK) Rig The G1AVQ rig reminded me of the N3FJZ rig that I worked in 2015: https://soldersmoke.blogsp...
5 comments:
Tuesday, May 21, 2024

Laser Communication in London 2007 -- a Pointer, a VW Solar Panel, and Radio Kismet

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Hack-A-Day has an article today about using a laser for data transmission.   This reminded me of a discussion I had with Mike KL7R about sim...
Friday, May 17, 2024

Band Imaging Rigs (Receivers and Transceivers) -- Video from WA7MLH

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In the video above (from 16 years ago) we see Jeff Damm, WA7MLH's  band-imaging receiver for 75 and 40 using an IF of 1.750 MHz and a VF...
7 comments:
Thursday, May 16, 2024

A Light-beam QSO in Hollandia, Christmas 1944

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This old QST article caught my eye, largely because my father was also in Hollandia on that  Christmas day in 1944.  He was in the Navy hos...
1 comment:
Wednesday, May 15, 2024

CuriousMarc Looks at Phase-Locked Loops (PLL)

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I really like Marc's (AL6JV) videos. It is great fun and very educational to watch him and his team troubleshoot some of the old gear th...
4 comments:
Monday, May 13, 2024

Ragnar LA1UH's Wonderful Museums in Norway

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Here are two more great museum visits by Helge LA6NCA.  In these two he visits Ragnar LA1UH.   Ragnar has a lot of maritime experienc...