Direct Conversion Receiver On 40m

This video introduces my build of the

The NM0S-designed Hi-Per-Mite is an audio filter for CW reception. The 3dB bandwidth is 200Hz, and it can be configured for ...

This is a second version of

A description of this build is at https://aa7ee.wordpress.com/2025/12/04/the-soldersmoke-

I did a modification today to slow down the tuning rate. We had been going from 7.0 to 7.3 MHz with only 5 or 6 turns of the dial.

Hello again my friends , this is Razi Naji , Amateur Radio with Call Sign ( YI1RZ ) . Today my

This is one of 2 videos of this

A very basic crystal radio for

https://eax.me/2020/2020-08-26-

Hello again everybody This is Razi Naji ( YI1RZ ) , in this video I will show you my personal design of

This video shows the measurement of the Minimum Discernable Signal level (MDS) of the Soldersmoke Challenge

Several mods and improvements mentioned in this video. I experimented with switching the RF and Audio ports. I turned down the ...

Simple

49 this is a

This is essentially the circuit shown in Chapter 1 of Experimental Methods in RF Design. I built a version of this 12 years ago but it ...

Quick video looking at testing using the radio configured as a

Receiving Test on

Direct Conversion Receiver