This FM valve transmitter was obtained on a 1947 Radio Craft. L1 consists of 4 turns of wire 18 in a 2 cm shape without core and L2 is formed by 2 turns of the same wire next to L1. The antenna must be of the telescopic type. The circuit is critical for the high frequency, requiring assembly experience. Although the tubes have 7 V filaments a 6.3 V transformer was used for their supply.
