Keyers TG-10-A, TG-10-B, TG-10-C, TG-10-D, TG-10-F, TG-10-G, TG-10-H and TG-10-J - USA Voorschrift, Technical Manual, 11-447 Radio sets SCR-193-A, SCR-193-B, SCR-193-C, SCR-193-D and SCR-193-E - USA Voorschrift, Technical Manual, 11-273 Test sets 1-61-A, 1-61-B and 1-61-C - USA Voorschrift, Technical Manual, 11-346
