Showing posts with label crystal radio. Show all posts
Showing posts with label crystal radio. Show all posts
Monday, March 11, 2024

Radio Items Picked-up at VWS Winterfest 2024 Hamfest

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As always, click on image for a better view Above you can see what I picked up at the Vienna Wireless Society's 2024 Winterfest Hamfest....
4 comments:
Wednesday, March 6, 2024

N6ASD Builds a Zinc-Oxide Negative Resistance Transmitter (and a Spark/Coherer rig)

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I saw this video and post on Hackaday this morning: https://hackaday.com/2024/03/05/making-a-crystodyne-radio-with-zinc-oxide-and-cats-whisk...
3 comments:
Sunday, January 14, 2024

QRP Trigger Warning! 500 kW from WLW (great video)

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Wow, this video will make you appreciate the simplicity of QRP!  My favorite part was when  they required the use of "dark welding gogg...
2 comments:
Thursday, November 16, 2023

The Grid Leak Detector -- Follow-up from Yesterday's Post on the Whole Earth Catalog's "Hippy" One Tube Receiver

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Click on image for a better view When I first looked at it in the Whole Earth catalog circuit, I thought it was a regen.  But a commenter c...
1 comment:
Tuesday, October 31, 2023

Building a Crystal Set (Videos)

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Andreas DL1AJG in Germany sent the above video to me.  Andreas is the fellow who ran the course in which his university-level students built...
1 comment:
Thursday, February 23, 2023

Early (1912?) Ham Station

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  Perhaps a bit overdressed by today's standards, but he's got a familiar look on his face.  Confidence and pride in his rig, and a ...
2 comments:
Wednesday, February 22, 2023

The Transistor at 75, and the Raytheon CK722 (Pete's First Transistor)

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  https://www.eejournal.com/article/the-transistor-at-75-the-first-makers-part-1/ Part 4 is especially interesting to us because of the N6Q...
2 comments:
Sunday, May 15, 2022

"Dream It - Make It" -- Rich WB4TLM, Mrs. Filoramo, and C.F. Rockey W9SCH (aka The Rock)

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  Rich WB4TLM spotted my bog posts about famed QRPer C.F. Rockey  W9SCH.  He followed up by sending me a link to the WB4TLM blog.   It is a ...
Friday, January 21, 2022

"From Crystal Sets to Sideband" -- A Great Book about Homebrew Radio by Frank Harris K0IYE (FREE!)

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I first came across the above picture of K0IYE's inspirational, completely homebrew station many years ago in the pages of "World R...
8 comments:
Thursday, June 3, 2021

Remastered! The Secret Life of Radio -- With Updated Comments from Tim Hunkin

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Thanks to Stephen 2E0FXZ for alerting us to this important video.  We first posted about the original many years ago.  We were delighted to ...
1 comment:
Friday, November 27, 2020

6EQUJ5 -- SNR, the Big Ear Radio Telescope, and the "Wow" Signal

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https://hackaday.com/2020/11/25/the-wow-signal-and-the-search-for-extraterrestrial-intelligence/#more-448808 This Hack-A-Day article explain...
1 comment:
Friday, July 24, 2020

Radio Schenectady

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A while back I posted a picture (see below) of the shortwave dial of an old receiver used by my wife's grandfather.   I noted the odd...
1 comment:
Saturday, June 17, 2017

SolderSmoke Podcast #197: Farhan, Fame, 'Fest, Testgear, SSB History, Dishal Dystopia, QRP CW, MAILBAG

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SolderSmoke Podcast #197 is available: http://soldersmoke.com/soldersmoke197.mp3 Up in NYC, met Dave W2DAB. got Steve Silverman...
3 comments:
Wednesday, June 7, 2017

The Leon Lambert Crystal Radio

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Above you see another gem from the Manassas hamfest.   I didn't know what this was.  And I don't think the seller knew what it was...
4 comments:
Tuesday, June 6, 2017

The Philmore Fixed Crystal Detector

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I was at the Manassas, Virginia hamfest on Sunday.  An old timer had a box of crystals for sale.  It was obviously the kind of "box ...
1 comment:
Sunday, May 29, 2016

Great "QSO Today" Interview with H.P. Friedrichs AC7ZL -- "My nature is to build."

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Eric 4Z1UG has a really wonderful interview with H.P. "Pete" Friedrichs AC7ZL .   Pete is the author of "The Voice o...
Sunday, December 27, 2015

"Receiver Here is My SWR meter OM..."

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Santa managed to include in his delivery some of the materials that I needed to build my 160 meter inverted L antenna.   You see, Steve Silv...
5 comments:
Monday, December 21, 2015

The Secret Life of Machines -- The Radio (Video)

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Thanks to Rick N3FJZ for sending this to us.  In 25 minutes these fellows manage to capture and explain much of the "magic" of r...
2 comments:
Tuesday, November 24, 2015

M1GWZ's Knack Story: From Crystal Sets to BITXs

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M1GWZ writes: "Just to establish my DIY radio credibility, here is a photo of my contest-winning crystal radio. Unpowered, it has...
1 comment:
Monday, March 31, 2014

SolderSmoke Podcast #159: Hamfests, Herring Aids, and Tuna Tins

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  SolderSmoke Podcast #159 is available.    http://soldersmoke.com/soldersmoke159.mp3 April 1, 2014 Vienna Wireless Hamfest ...
5 comments: