Two-color, QST Ham Radio Magazine 2-page print advertisement from September 1964 for "Harp cathode in new AMPEREX SSB twin tetrode permits full talk-power in 100 millisceonds!".

Excellent condition, with no tears or stains. Please ignore any cross-hatch pattern in the photo, it is not in the ad, I may have had the scanner resolution set too high. Please see photo for further details.

Securely packaged.