500 kc/s Pup transmitter

This is a circuit of the “PUP” transmitter that was used at the receiving station Auckland Radio ZLD.

This transmitter was used to communicate on 500 kc/s and was in use until the station closed in 1993.

To build this most Amateurs would find the parts in their “Junk” box.

As most commercial amateur transceivers will not transmit on this band, this transmitter would be an ideal project for experimenters to copy.

ZLD 500 kcs Pup Transmitter circuit