The Vintage Advance Components RF Signal Generator Type P, Model 1 Serial No. 447 is a high-quality signal generator designed in the United Kingdom. With a frequency range of 100KHz to 100MHz, this RF signal generator with AF modulator is perfect for testing, measurement, and inspection purposes. The Advance brand ensures reliability and precision in generating RF signals, making it a valuable tool for various industrial and office applications. This model is one of the first Type P. made approx. in the 1940s and is still in working order. This is a rare example of a valve instrument of the era. This is a two valve generator and also included is a schematic drawing.