Note
Electronics World, Jun 1971, p. 70.
Ham Radio, Jun 1972, p. 85.
Ham Radio, Jan 1973, p. 61.
The STR-1 receives continuous standard time and frequency broadcasts from WWV on 5, 10, and 15 MHz. Optional coverage is also available for Canadian standard time broadcasts from CHU on 7.335 and 14.670 MHz. Note that CHU is no longer using those frequencies.
The only controls are the volume control with on-off switch and the channel selector.
Sensitivity is 0.25 uV for 10 dB signal-plus-noise to noise. Dual-gate MOSFETs are used in the front end to achieve high sensitivity, low noise and good AGC characteristics. Ten transistors, two silicon diodes, one germanium diode and one zener diode are used in the circuit. The STR-1 operates from and AC line or from an internal 12-volt battery.
References
Brief description. Electronics World, Jun 1971, p. 70.
