Friday, October 28, 2022

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

›
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?

›
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

›
  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:
Tuesday, October 11, 2022

SolderSmoke FOREVER! Archived in the WayBack Machine

›
  There were recently some stories about an effort to put on the Internet Archive recordings and other material from the history of ham radi...
Monday, October 10, 2022

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

›
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:
Sunday, October 9, 2022

Paul Clark's Dollar Store PTOs made with Glue Sticks or Chap Sticks

›
A few weeks ago Pete Juliano and I got some e-mails from Paul Clark about his use of Chap Sticks and Glue Sticks (acquired at a Dollar Store...
18 comments:
Friday, October 7, 2022

How the Diode Ring Multiplies by 1 and -1 -- "The Secrets of the Diode Ring" -- Plus another Bandsweep with the DC RX

›
A deeper look into how the Diode Ring detector works: "the particular go of it." Here I rely on a wonderful diagram from the RSG...
8 comments:
Thursday, October 6, 2022

How to Tap an Aluminum Heat Sink: Pete Juliano Shares Tribal Knowledge

›
This is a SolderSmoke Classic:  Pete Juliano N6QW coached me on how to tap (put screw threads) a piece of aluminum.  This is an important ho...

Adding a Diode Ring to the Direct Conversion Receiver, And How the Diode Ring Works

›
I take a look back at Wes Hayward's classic DC receiver from the November 1968 QST. I then try to describe how diode ring mixers work (...
2 comments:
Tuesday, October 4, 2022

Tim Hunkin's "The Radio Set" Drawing, and The Secret Life of the Radio (Remastered)

›
  Click on the image for a better view. Click here for the whole drawing:  https://www.secretlifeofmachines.com/secret_life_of_the_radio_set...
2 comments:

The Workshop and Bench of the QRP Home Builder, Todd VE7BPO

›
What a treat!  We have been learning so much, for so long from Todd VE7BPO.  I was really pleased to have this look at the workshop where al...
Sunday, October 2, 2022

Update on the Direct Conversion Receiver -- Now only 4 transistors

›
I took a new look at the receiver, did some measurements, and decided to take out the RF amplifier and the AF pre-amp. The receiver works ...