Found in an April 1977 Radio Electronics issue, this circuit uses the well-known XR2206. The C1 values for the various frequency bands are given next to the diagram.
This field strength meter is intended for the VHF range, above 100MHz. The lowest voltage or...
We found this circuit in an English publication in 1976. The circuit is based on the use of a...
This antenna tuner was found in a 1995 publication in the 1993 Electronics Hobbyists Handbook. The coil...