This converter for WWV time reference station signals was found at Popular Electronics. The 15 MHz signals are now received on a medium wave radio at 1 MHz.
This circuit uses a JFET CA3140 operational amplifier to convert a low frequency sinusoidal signal...
This circuit is from the National Semiconductor Audio Handbook. The amplifier operates with 6 V...
This simple amplifier was found in a Radio Electronics magazine from July 1970. The transistors are...