USS Cobia Radio Restoration

Vacuum Tubes are needed as spares for the WWII submarine USS COBIA (SS-245).

If you have any of these tubes, please consider making a donation.

*updated 05/16/19

If sending parts, please address your package to the following address

Wisconsin Maritime Museum
Attn: Electronics Shop
75 Maritime Drive
Manitowoc, Wisconsin 54220

Your donation will help support the ongoing restoration and operation of
the radio and radar equipment on the boat. If you have questions send an email to Museum@WisconsinMaritime.org with “vacuum tubes” in the Subject Line.

Questions? Contact us!

NOS tubes are desired but used tubes that test “good” are welcome.

Parts in bold are urgently needed.
  • C3, (VR105-30)
  • 0D3, (VR150-30)
    1N21 (SJ-1 Radar mixer diode – need any version but particularly the “F” or above)
  • 2A3
  • 2J50
  • 2K25
  • 2X2
  • 3B24
  • 4PR60 (SJ-1 Radar pulse modulator)
  • 5D21
  • 5FP7
  • 5HP1
  • 5R4
  • 5Y3
  • 5Z3
  • 6A7
  • 6AC7
  • 6AG7
  • 6AK5
  • 6AQ5
  • 6C6
  • 6D6
  • 6E5
  • 6H6
  • 6J5
  • 6K6
  • 6K7
  • 6L6 (Metal version really needed)
  • 6SA7
  • 6SC7 (Running low on these)
  • 6V6
  • 6X4
  • 6X5
  • 6Z4
  • 12A6
  • 12AU7
  • 12H6
  • 12K8
  • 12SR7
  • 12SA7
  • 12SF7
  • 12SG7
  • 12SJ7
  • 12SK7
  • 12SQ7
  • 41
  • 42
  • 75
  • 76
  • 77
  • 80
  • 84
  • 322 Pilot Lamp
  • 703-A
  • 705A
  • 706AY, BY (SJ-1 is currently tuned for AY version)
  • 717A
  • 721A/B (SJ-1 Radar TR/ATR Switch)
  • 723A/B
  • 724B
  • 726B (SJ-1 Radar local oscillator)
  • 803
  • 836
  • 860
  • 874
  • 876
  • 955
  • 991 (NE-16)
  • 9005
  • 38160
  • 38205
  • 38250
  • 38803

Equipment utilization of vacuum tubes used aboard the USS COBIA (SS-245)

1MC Alarm & Announcement Sytem
  • 6C6
  • 76
  • 6D6
  • 6L6 (metal)
  • 84
  • 6Z4
  • 5Z3
  • 6SC7
  • 6X5
SJ-1 Radar
  • 1N21(*)
  • 2X2
  • 5D21
  • 4PR60
  • 5FP7
  • 5HP1
  • 705A
  • 3B24
  • 706AY,BY,CY
  • 717A
  • 721A
  • 726B
  • 836
  • 5U4
  • 6AC7
  • 6AG7
  • 6H6
  • 6L6
  • 6SN7
  • 6SQ7
  • 6V6
  • 6X5
  • 807
  • 991
  • 0C3
  • VR105-30
  • 38205
  • 0D3
  • VR150-30
  • 38250
  • 322 Pilot Lamp
  • 47 Pilot Lamp
APR-1 Receiver
  • 9005
  • 955
  • 703-A
  • 6E5
  • 6AC7
  • 6H6
  • 6AG7
  • 5Y3
ST Radar
  • 6SN7
  • 6V6
  • 6AK5
  • 6H6
  • 5D21
  • 705A
  • 723A/B
  • 724B
  • 2K25
  • 2J50
RAK and RAL receivers
  • 6D6
  • 41
  • 5Z3
  • 874
  • 876
  • 80
RBO receivers
  • 6K7
  • 6J5
  • 6SA7
  • 6SK7
  • 6H6
  • 6J5
  • 6SJ7
  • 6K6
  • 6E5
  • 6X5
TBL Transmitter
  • 860
  • 38160
  • 803
  • 38803
  • 2A3
TCS-12
Transmitter/Receiver
  • 12A6
  • 1625
  • 12SK7
  • 12SA7
  • 12SQ7
  • 5R4
  • 5U4
  • 6X5
RBS-2 Receiver
  • 12SG7
  • 12H6
  • 12SJ7
  • 12SK7
  • 12A6
  • 5U4
  • 6V6
LM-12 Frequency Meter
  • 76
  • 77
  • 6A7
  • 991
AIM-215 Amplifier
  • 6AQ5
  • 6X4
  • 12AU7

Your donation helps support the ongoing restoration and operation of the radio and radar equipment on the USS Cobia.

USS Cobia & Manitowoc Subs Submarine USS Cobia USS Cobia Radio Restoration