JH8SST Build's Pete's Simpleceiver (video)

Jun JH8SST made this nice video about his version of Pete Juliano's Simpleceiver.   I like the approach of putting the stages on separate boards, but perhaps Jun could have made things easier by using Manhattan-style construction on those boards.  And of course I like the breadboard-style aluminum sheet.  FB Jun.  

Jun writes:

I've built a simpleceiver, which is a modified version.   My first main board didn't work because of several problems, and that's why I decided to divide the board into several separated PCB's with some circuit modifications.

 

RF and Mixer stages are original, but I employed an 8pole 9MHz ladder Xtal filter.   The J310 X 2 is used in IF amplifiers, but load resonant circuit is modified to use a type 10K coil form and a ceramic capacitor.

J310 product detector is original and built on a tiny PCB, as shown in attached photo and YouTube Video.

 

This modified Simpleceiver has high sensitivity and more than enough gain. I needed to reduce RF/IF gain to eliminate product detector distortion caused by stronger signals.

 

This simpleceiver works really nicely.

 

I'm going to re-modify it to make it as original as possible.

 

The block diagram is:  J310X2 RF－DBM－9MHz 8 pole X'tal Filter－J310X2 IF－J310X2 IF－J310 product detector－AF　μA741－AF LM380 with NFB.

 

I'm going to re-modify it as:  J310X2 RF－DBM－J310X2 IF－12MHz 4 pole X'tal Filter－J310X2 IF－J310 product detector－AF　μA741－AF LM380 with NFB.

 

I'm also going to add an AGC system using a modified W1FB AGC circuit.