This is a 1946 post-war model radio. The 3-tube receiver has a long-known tube configuration.
The maximum frequency of the oscillator shown in figure 10 is on the order of 5 MHz, depending on the...
This direct-coupled two-transistor amplifier stage was published in the September 1958 Radio...
The indicator for this circuit is a 0 to 1 mA milliammeter. The operational is from the 70s, when...