ARRL Single Sideband for the Radio Amateur 1970 p193 et seq.
"An Engineer's Ham-Band Receiver"
I've duplicated the PLL for another radio and copied ideas for radios I have built.
They worked very well.
Three reasons its not a fit for uBITx......
One: the MOSFets used disappeared in the late 70s.
Two: Its a narrow band front end using varicap tuning, usually called a preselector. Lots of band coils.
Three: is it would require much switching to take it out of the transmit path.
Allison
