Showing posts with label VHF. Show all posts
Showing posts with label VHF. Show all posts
Wednesday, August 12, 2026

A German Builder Makes a 2 Meter Receiver - Warts and All!

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First, you probably need to turn on closed captioning, and select autotranslate, probably to English.   This video is worth it.  This fellow...
1 comment:
Saturday, August 8, 2026

Using a 5 inch Naval Gun Mount as a Rotor and Being Asked by NASA to Listen for Artemis -- Why no lightning strikes?

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Wow, this is very cool.  I don't have a 5 inch naval gun mount.  And NASA has never called me for any reason.   This is all almost too m...
1 comment:
Monday, July 27, 2026

Understanding Super Regeneration (Good luck!)

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Edwin Armstrong presenting the superregenerative receiver at the June 28, 1922 meeting of the Radio Club of America in Havemeyer Hall, Colum...
4 comments:
Sunday, July 26, 2026

UK Homebrew VHF Matchbox Bugs

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There is a lot of interesting tech in these little boxes:   -- T he way they are powered (hearing aid batteries).  -- The way they are modul...
Thursday, May 21, 2026

School for Danger -- the SOE, and Radio, in Nazi Occupied France

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Hack-a-Day had a link to this film .  It is really good.  There is some stuff about radio, and especially the S-Phone system.  But the bigge...
3 comments:
Thursday, January 29, 2026

Attempting 2 meter contact, Dominican Republic to Puerto Rico

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It is about 100 miles across the Mona Channel.  That is a longshot on 2 meters, but I got the idea when, this past summer, I regularly hear...
12 comments:
Friday, September 26, 2025

Maybe it is Tropospheric Ducting After All -- 99.5 FM WIDI Puerto Rico Received in the Dominican Republic

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  Invest 94L moved arcoss the Mona Passage yesterday, lowering temperatures, bringing lots of rain and relatively high winds to the area.   ...
3 comments:
Sunday, September 14, 2025

Do I really NEED Tropo to hear the Puerto Rican FM Broadcast Station? Or are we just close enough to do this line-of-site?

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  WIDI 99.5 FM from western Puerto Rico continues to put a full quieting signal into the eastern Dominican Republic.   The station is so reg...
3 comments:
Thursday, September 11, 2025

Puerto Rico -- Dominican Republic Tropo on 99.5 FM? Yes, probably

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  Our friend Todd K7TFC in Portland found this in the 1950 ARRL Handbook at an, uh, opportune moment.  TRGHS.  This seems to describe what a...
1 comment:
Wednesday, September 10, 2025

Puerto Rico FM Broadcast Station Heard in the Dominican Republic -- But How? WIDI 99.5 FM

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WIDI 99.5 FM. Booming in during daylight here on the eastern tip of the Dominican Republic. Their antenna is about 2100 feet above average ...
3 comments:
Thursday, May 8, 2025

Wow! DOVAD and Doppler at White Sands Missile Range

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EI7GL has a really interesting blog post about a VHF system used at White Sands to accurately track early rocket tests:  https://ei7gl.blogs...
Tuesday, June 18, 2024

Amazing Homebrew from Japan -- 7L4WVU's All Homebrew Station

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Thanks to Roy WN3F for alerting me to this.  Tadashi-san has really built some beautiful stuff.  Especially impressive to me is his use of t...
1 comment:
Wednesday, May 31, 2023

Farhan VU2ESE FDIM Interview (#6) by Bob Crane W8SX: VHF Rig, sBITX, and Good News on Raspberry Pi 4

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It was great that Bob was able to catch up with Farhan and talk to him about his VHF rig and about the sBITX.       Farhan said that the VHF...
1 comment:
Tuesday, May 30, 2023

Rick Campbell KK7B at FDIM: Interview #5 by Bob Crane W8SX

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/KH6 Having recently been involved in an effort to teach students about radio electronics, I found Rick's comments especially interestin...
Saturday, May 20, 2023

Farhan Describes his New 2 Meter SSB Transceiver (Video)

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On May 16, 2023 Farhan gave us a look at his new BITX23 2 Meter Transceiver. Two days later he made a presentation on this rig at the Four ...
Friday, August 26, 2022

PA3CRX's 6 Meter BITX in an Old CB Case

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Thanks to Rogier PA1ZZ for alerting me to this video and to the PA3CRX YouTube channel.  I like what Chrix did with the old CB transceiver c...
Wednesday, November 17, 2021

SolderSmoke Podcast #234: PSSST, KWM-1, VHF Woes, Mighty Midget, TinySA, 17-12 Dual-Bander Advice Needed. MAILBAG

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http://www.gadgeteer.us/17SSB.HTM SolderSmoke Podcast #234 is available:  http://soldersmoke.com/soldersmoke234.mp3 Roots of SolderSmoke: Th...
5 comments:
Sunday, November 7, 2021

JPL, Mars Helicopter, Cube Sats, Ham Radio and more: N5BF talks to Eric Guth 4Z1UG

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This morning Eric Guth has a really interesting interview on his QSO Today podcast.   Courtney Duncan N5BF had a full career at JPL and is t...
Tuesday, November 2, 2021

Farhan's Amazing Knack Story: From a Boyhood SW Receiver to the Design of the sBITX SDR

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The presentation starts at about the 4 minute point.  I think if I were only allowed to watch one YouTube video in the next year, I'd ma...
2 comments:
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 ...
7 comments: