Ham Radio Horizons Magazine

The vintage amateur radio magazine Ham Radio Horizons has been archived for posterity and PDFs are available for download 

The magazine, targeted at newcomers, was published by Communications Technology, Inc. who also produced Ham Radio magazine. It ran from March 1977 to 1981 when it was incorporated into Ham Radio magazine which in turn ceased publication in 1990. 

Ham Radio Horizons - https://archive.org/details/hamradiohorizons