This transmitter for phone in the indicated ranges was found in an American documentation from 1941. The circuit has 7 tubes, with one count with a transformer. Output power is 25 watts with 6L6 tubes. The documentation describes its assembly.

This transmitter for phone in the indicated ranges was found in an American documentation from 1941. The circuit has 7 tubes, with one count with a transformer. Output power is 25 watts with 6L6 tubes. The documentation describes its assembly.