12-06-2013, 02:33 PM
""Looking at the third one more closely I suspect it would use OC44 & OC45 transistors as there appear to be pads for the feedback/neutralising components in the IF stages. It also looks to have the audio amplifier stages but it's difficult to see if it's a transformer coupled amp or is a complementary pair. Any way it looks like an early 60s design""
The first solid state superhet I made was from a design in a mag (PW?) circa 1964 (ish) it used weyrad round IFT's plus OC44- 45 etc, I can't remember if there was a custom PCB for it at the time, there might well have been, I ended up building mine on a sheet of paxolin, all the small component holes being made with a sharpened up cheapo jewelers screw driver set (needs must)
Lawrence.
The first solid state superhet I made was from a design in a mag (PW?) circa 1964 (ish) it used weyrad round IFT's plus OC44- 45 etc, I can't remember if there was a custom PCB for it at the time, there might well have been, I ended up building mine on a sheet of paxolin, all the small component holes being made with a sharpened up cheapo jewelers screw driver set (needs must)
Lawrence.
