Paolomar VLF converter: schematic
 

Its a cold, rainy day here so I decided to pull out this VLF
comverter and take a look at it. Seems to work OK, but I've
noticed that part of the PC board has not been loaded with
parts. Seems to be a preamp. A search on the web didn't turn
up anything.

I've found there are (at least) two versions. One uses a J-FET and
NPN transistor in the preamp (board 1269B), but the version I
have only uses an NPN transistor (board 1269D). Does anone
out there have the schematic for the 1269D version?

Thanks!
Steve