Wireless Set No. 52 Canadian - Project

[David Dunlop]

Finally finished with the reconnection of the AC Line Cord to the chassis of the ZE-11 Remote Supply. In the attached photo you can see one lead just left of centre, curving past a hex nut and up to a terminal on a toggle switch, and just left of that, the second longer lead arcing up towards the camera and then on down to a terminal on the AC Selector Socket.

Having done that, I plugged in the supply and turned the electrons free. Low tension came in on target at +12V AC, but the high tension output was only +15V DC instead of the anticipated +150V DC. The input voltages to the OZ4 checked out at +201 V AC, so the transformer is OK, Downstream of the OZ4 checked out with the correct amount of resistance, so back to retest the OZ4. Bummer! It came in at barely 8% effective. Can’t really complain. It is probably the original 1943 Marconi OZ4.

Now to track down a good OZ4 and try again.


David