1943, U.S. ARMY, SIGNAL CORPS, TELEPHONE EE-8-A, Kellogg Switchboard and Supply Company
民國32年，美國陸軍，通信部隊，EE-8-A 野戰電話，凱洛格交換機及供應公司《Black Water Museum Collections | 黑水博物館館藏》
EE-8 野戰電話的聽筒與現代電話相仿，差別在TS-9型話筒上有一個類似無線電麥克風的蝴蝶型通話鈕，說話時再打開可節省電池電力，雙向通話，結構堅固耐用，多數EE-8 野戰電話至今仍然可以正常工作。
美軍陸軍從民國24 年(1935)到越戰期間持續使用 EE-8 野戰電話。使用被覆線最大傳輸距離為11公里。 EE-8 使用 1號(D)電池供電，當電池電壓下降，話筒音量也隨之下降。EE-8 野戰電話用手搖發電機發電，使另一端的電話響鈴。早期型是皮製攜行袋，二戰後期為節省成本改為帆布製攜行袋。在第二次世界大戰期間，野戰電話比無線電更受歡迎，因為EE-8 野戰電話比背負式 (SCR-300)無線電和手持式無線電 (SCR-536) 可靠得多。
Versions
The differences in the versions amount to minor construction variaions and early phones have leather cases and later phones have canvas cases. They all operate in the same way. They all use the TS-9 handset with a Turn-To-Talk switch.
EE-8
case 9 3/8 x 7 1/4 x 3 1/2"
Leather case with cutout above hook switch to allow case to be closed, yet handset can operate hook switch.
Aluminum chassis
GN-38 , 3 external horse shoe magnets
CA-209, CA-177-A & CA-259 individual capacitors
EE-8A
case 9 9/16 x 7 11/16 x 3 1/2"
Aluminum chassis
GN-38
CA-355 combined capacitor
EE-8B
case 9 9/16 x 7 11/16 x 3 1/2"
Steel chassis
GN-38-A external coils enclosed shaft, GN-38-B, smallest with exposed shaft
CA-355 combined capacitor