Inactive

Thirty (30) Machlett Laboratories (ML) 6697A Electron Tubes (10 each year for three years) manufactured by Communications & Power Industries (CPI), which provides the final power amplification for the... Thirty (30) Machlett Laboratories (ML) 6697A Electron Tubes (10 each year for three years) manufactured by Communications & Power Industries (CPI), which provides the final power amplification for the Army-Navy/Frequency Radio Transmit-31 (AN/FRT-31) Very Low Frequency (VLF) transmitter.