Showing posts with label VFO. Show all posts
Showing posts with label VFO. Show all posts
Saturday, November 2, 2024

More Background on the Mythbuster II Rig (and a short video)

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Above is a short clip of me hearing an old friend on the new receiver.  TRGHS.  A couple of guys on Facebook asked for a schematic for thi...
7 comments:
Monday, September 23, 2024

Ham Radio -- How To Build Stable Oscillators

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Spasibo Vasily!   Wow, thanks a lot Todd.   There is some great wisdom in your video.  You clearly demonstrate that it is possible to build ...
4 comments:
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, April 29, 2024

Old Tricks, Lore, and Art -- Freezing and Baking our LC VFOs -- An Example from Cuba

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Pavel CO7WT explained why Cuban hams used a process of thermal endurance to improved the frequency stability of their homebrew rigs:    ----...
5 comments:
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:
Saturday, February 17, 2024

Nate KA1MUQ's Amazing Thermatron Receiver

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https://natesbasement123.blogspot.com/2024/02/thank-you-bill-dean-grayson-pete-and.html Wow, some really wonderful work is taking place in N...
1 comment:
Saturday, February 10, 2024

SolderSmoke Podcast #250 Dean KK4DAS joins Pete N6QW and Bill N2CQR

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SolderSmoke Podcast # 250 is ready for download:  http://soldersmoke.com/soldersmoke250.mp3 VIDEO VERSION:  (1707) SolderSmoke Podcast #250 ...
7 comments:
Wednesday, February 7, 2024

Videos from Mike AG5VG -- His Homebrew BITX Rigs

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Here are two great videos from Mike AG5VG showing his two homebrew receivers in action.  (The transmitter portions of Farhan's circuit w...
5 comments:
Tuesday, February 6, 2024

Pine Boards, Analog VFOs, and Homebrew BITX Transceivers -- AG5VG's Magnificent Creations

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Click in image for a better view This is amazingly cool.  WE ARE NOT ALONE!  There are others out there breaking the tyranny of the Si5351, ...
3 comments:
Friday, January 12, 2024

QF-1 Variable Capacitor Problem -- What Should I do?

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For years I have been heartlessly slaughtering innocent Heathkit Q multipliers, just to get these variable capacitors. Dean KK4DAS has join...
11 comments:
Sunday, October 22, 2023

DIAL SCALE LINEARITY -- Spreading out the Frequencies for the 15-10 BITX Rig

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Click on the image for a better view The 15-10 Rig has been performing very well, pulling in a lot of DX contacts on both bands.  But there ...
3 comments:
Tuesday, September 26, 2023

F6CRP's FB Homebrew Receiver

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I like F6CRP's homebrew receiver.  I like the way he presents it (block by block) and I like the inclusion of the W7ZOI IF board. The JF...
2 comments:
Friday, May 26, 2023

Coffee with Farhan VU2ESE (video)

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Early morning in the N2CQR shack, May 16, 2023 -- Propagation -- Web sites (RBN, PSK Reporter, others) -- CW -- Homebrew rigs -- VFOs
2 comments:
Thursday, April 13, 2023

The Franklin Oscillator: A Super-Stable VFO. Why No Attention? Why So Little Use?

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My Franklin VFO Lee KD4RE of the Vienna Wireless Society has been talking about the Franklin oscillator. He has been telling us that it is v...
20 comments:
Saturday, November 19, 2022

A 1966 73 Magazine Article on a Homebrew Permeability Tuned Oscillator (PTO)

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In April 1966, Lewis Fitch W4VRV of Columbus, Ohio built a Permeability Tuned Oscillator.  It is remarkably similar to the devices we are bu...
1 comment:
Tuesday, November 15, 2022

A Treasure Trove of Permeability Tuned Oscillator (PTO) Info and Links (Plus Info on Direct Conversion Receivers)

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There is really great info on this page , and even more in the links at the bottom of it.  While the page is about PTOs, the links often dis...
1 comment:
Friday, October 28, 2022

SolderSmoke Podcast #241 Mars, Direct Conversion, PTOs and Glue Sticks, Anniversary of the BITX20, Multus Proficio SDR, Boatanchor Station, MAILBAG

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The board I use to test DC RX circuits   SolderSmoke Podcast #241 is available Audio (podcast):    http://soldersmoke.com/soldersmoke241.m...
5 comments:
Saturday, October 15, 2022

DC Receiver: 100db Gain? Diplexer? VFO in a box?

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Here is a progress report on Direct Conversion Receiver developments. Dual Tuned Circuit, Diode Ring with Diplexer, PTO VFO from Farhan...
8 comments:
Wednesday, October 12, 2022

World's Most Interesting Man on PTOs and Glue Sticks

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  I mean, if they are good enough for the Dos Equis guy, maybe we should give them a chance.  (134) Glue Sticks! Chap Sticks! Paul Clark’s D...
1 comment:
Monday, October 10, 2022

Listening on 40 with a Glue Stick PTO in a Direct Conversion Receiver; Some PTO History

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Thanks to Paul WA1MAC for this idea.  He first shared it with us via the SolderSmoke mailbag in 2008!  Sorry it took so long for me to try o...
1 comment: