TU - Tuning Unit

• TU-1, Transmitter Tuning Unit Frequency Range, 150 to 260 KC, BC-191
• TU-2, Transmitter Tuning Unit Frequency Range, 260 to 400 KC, BC-191
• TU-3, Transmitter Tuning Unit Frequency Range, 400 to 800 KC, BC-191
• TU-4, Transmitter Tuning Unit Frequency Range, 800 to 1500 KC, BC-191
• TU-5, Transmitter Tuning Unit Frequency Range 1500 to 3000 KC, BC-191, BC-375
• TU-6, Transmitter Tuning Unit Frequency Range 3000 to 4500 KC, BC-191, BC-375
• TU-7, Transmitter Tuning Unit Frequency Range 4500 to 6200 KC, BC-191, BC-375
• TU-8, Transmitter Tuning Unit Frequency Range 6200 to 7700 KC, BC-191, BC-375
• TU-9, Transmitter Tuning Unit Frequency Range 7700 to 10000 KC, BC-191, BC-375
• TU-10, Transmitter Tuning Unit Frequency Range 10000 to 12500 KC, BC-191, BC-375
• TU-11
• TU-12
• TU-13
• TU-14
• TU-15
• TU-16
• TU-17, Transmitter Tuning Unit Frequency Range 2000-3000 kHz, BC-223
• TU-18, Transmitter Tuning Unit Frequency Range 3000-4500 kHz, BC-223
• TU-19
• TU-20
• TU-21
• TU-22, Transmitter Tuning Unit Frequency Range 350 to 650 KC, BC-191,
• TU-23
• TU-24
• TU-25, Transmitter Tuning Unit Frequency Range 3500-5200 kHz, BC-223
• TU-26, Transmitter Tuning Unit Frequency Range 200 to 500 KC, BC-375
• TU-27
• TU-28
• TU-29
• TU-30
• TU-31
• TU-32
• TU-33
• TU-34
• TU-35
• TU-36
• TU-37
• TU-38
• TU-39
• TU-40
• TU-41
• TU-42
• TU-43
• TU-44
• TU-45
• TU-46
• TU-47, 2.0 to 2.5 Mc, BC-610
• TU-48, 2.5 to 3.2 Mc, BC-610
• TU-49, 3.2 to 4.0 Mc, BC-610
• TU-50, 4.0 to 5.0 Mc, BC-610
• TU-51, 5.0 to 6.35 Mc, BC-610
• TU-52, 6.35 to 8.0 Mc, BC-610
• TU-53, 8.0 to 12.0 Mc, BC-610
• TU-54, 12.0 to 18.0 Mc, BC-610
• TU-55
• TU-56
• TU-57
• TU-58
• TU-59
• TU-60, barrage jammer for use against enemy communications.