MC1496 Product Detector .
All components are easy to to find except the old MC1496 . luckily I've got one piece.
Initial tests gave a good result. Injected 14 MHz at 1st input and RF via a long wire to 2nd input (without pre-selector ) . Next I will add pre-selector and 386 IC.
Back ground -Solid State Design by Wes Hayward W7ZOI and Douug DeMaw W1FB .