By George Jacobs W3ASK,
Theodore J. Cohen N4XX
and Robert B. Rose K6GKU.
A comprehensive review of the principles and theories of shortwave propagation prediction. Reviews: ionosphere, sunspot cycles, forecasting, unusual HF & VHF propagation, etc. Generous use of charts and diagrams makes it understandable for hams and shortwave listeners. ©1995 Second Printing 1997 CQ 150 pages.

Order #2053 ..... $19.95