Explorer for all ranges (T1098E)

This circuit was found in a Radio Craft from October 1946. Power supply not shown, and tubes are 1.5V filament types.

Operational Pulse Generator 1 (CB14830E)
We found this circuit in a French technical documentation from 1982. The circuit can be...
Magnetic Phonocaptor Preamplfier (CB15818E)
This circuit, suitable for record players with magnetic phonocaptors (pickups), has RIAA...
Wireless Alarm Transmitter (CB25208E)
We found this circuit in the May 1989 issue of Radio Electronics magazine. The circuit uses...