The history of the receivers OK-102/I & OK-102/II

OK-102/I & OK-102/II are Polish marine communication receivers designed by eng. R. Żebrecki and produced by MORS factory in Gdynia from 1958 till 1975.
The OK-102/I could be used as a direction finder.
OK-102/I with RG-141 antenna was the first maritime direction finder made in Poland. The OK-102/II had support for higher HF bands, but lacked the DF circuit and the 200-550kHz band was dropped.
Both receivers was used by Polish hams.

OK-102/II - RX Test