- USS North Carolina
| Shipboard Wire Antenna Installation
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Receiving Antenna Installation Detail
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Antenna Trunk
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Antenna Trunk Detail
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| Shipboard Wire Antenna installation
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Shipboard Wire Antenna hardware
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Cylindrical trunks and insulators - USS North Carolina
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Wire Antenna & Trunk Hardware |
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Note: Insulator nomenclature changed: e.g. NT-61335 (1940's) became IL-18/U (1960's), then became NL222B31-203 (1970's) |
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| MX-407B/U end seal (feed-through insulator) NT-91836 |
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about 8.5" long
used to connect RG-18/U, RG-218/U, RG-220/U coax to antenna tuning and matching network enclosures |
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| MX-1460/U end seal (feed-through insulator) | need photo | used to connect RG-18/U coax to antennas. | - |
| MX-1461/U end seal (feed-through insulator) NT-92180 |
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about 6" long
used to connect RG-10/U, RG-213/U coax to antenna tuning and matching network enclosures |
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| NT-24206 Antenna Disconnect Switch |  SPDT, 200 amps @ 7500v "closed" or "grounded" |
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manuf Powercraft Corp. CYP-24206 |
| NT-24223 Antenna Disconnect Switch | need photo SPDT, 100 amps @ 2500v "closed" or "grounded" |
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| NT-24270 Antenna Disconnect Switch |  SP3T, 200 amps @ 15kv "ground", "closed", or "open" |
used in 9"x11" antenna trunk | - |
| NT-10658A antenna wire turnbuckle |  |
used to feed antenna wire - Fiege connector clamps wire rope | manuf CBEP-10658A |
| NT-61019 outside entrance insulator (ceramic is NT-61234) (NL422B58-055) |
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used to connect antenna lead-in to antenna trunk. Also used
as trunk bulkhead feed-through
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manuf CAL-61019C CBJ-61019C |
| NT-61??? | 
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used to feed antenna trunk center conductor through bulkhead?
2.5" tall, mounts in 2.75" hole
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| NT-61174 pedestal standoff insulator |  |
3.3" tall
used to stand off center conductor in antenna trunk |
manuf Lapp CBO-61174B |
| NT-61175 pedestal standoff insulator |  |
used to stand off center conductor in 6"x8" antenna trunk see trunk drawing above
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manuf Lapp CBO-61175A |
| NT-61180 pedestal standoff insulator |  |
used to stand off center conductor in antenna trunk see trunk drawing above |
manuf National Porcelain CPP-61180B |
| NT-61276 antenna base insulator |  |
whip antenna base - need more info | - |
| NT-61335 antenna base insulator | need photo | whip antenna base - need more info see drawing above |
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| NT-61338 standoff insulator | need photo see drawing above |
used to stand off center conductor in 18"x20" antenna trunk see trunk drawing above |
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| NT-61339 pedestal standoff insulator |  not sure of part number |
used to stand off center conductor in 9"x11" antenna trunk see trunk drawing above |
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| NT-61350 antenna base insulator | need photo see drawing above |
whip antenna base - need more info see drawing above |
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| NT-61455 |  |
purpose? |
manuf CMP-61455 |
| NT-61475 outside entrance insulator (NL422B58-122) |
 used to connect transmitting antenna lead-in to antenna trunk - see trunk drawing above - (ceramic part is NT-61476) |
 USS Slater - trunk and insulators Note - red paint indicates transmitting antenna |
manuf CBJ-61475 |
| NT-61479 strain insulator (NL422B71-112) |
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ceramic about 10" long used as shown in figure 3-32 above |
manuf CBJ-61479 |
| (NL422B71-167) | as above | ceramic about 15" long | - |
| (NL422B71-207) | as above | ceramic about 20" long | - |
| NT-61481 strain insulator | need photo | used as shown in figure 3-32 above | - |
| NT-61493 strain insulator | need photo | used as shown in figure 3-32 above | - |
| NT-61494 strain insulator | need photo | used as shown in figure 3-32 above | - |
| NT-62111 end seal (feed-through insulator) |
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| NT-62119 end seal (feed-through insulator) |
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| NT-90835 antenna mount feed-through insulator |  |
5.75" diameter 7/8" x 3.5" antenna mount 9/16" threaded connector |
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| NT-91836 end seal see MX-407B/U above |
see MX-407B/U above | - | - |
| NT-92180 end seal see MX-1461/U above |
see MX-1461/U above | - | - |
| PT Boat Whip Antenna Base
Need Info???? |
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| CU-836/U matching transformer |  |
For receiving antenna use - connecting to feedline or rhombic antennas 2-32 mc matches 600 or 200 ohms to 70 ohm coax feed TMC model RAC-32
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| NT-471138 matching transformer
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For receiving antenna use - connecting to feedline or rhombic antennas 3-22 mc matches 700 or 250 ohms to 70 ohm coax feed Similar to CU-128B/U except different transformer shielding and mount |
manuf Washington Naval Gun Factory RW-471138
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 coax input terminal 2, ground terminal G |
 250 ohm output terminals 4-7 700 ohm output terminals 3-8 |
TMC TRC-500Spec sheets |
500 watt, 72 ohm to 600 ohm 2-30 mc
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TMC TRC-3500 - similar to CU-729/URT (50 ohm, 3500w) & CU-1076/URT (72 ohm, 3500w)
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3500 watt, 50 ohm to 600 ohm 2-30 mc
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TMC TER-500 - 600 ohm, 500wSpecs Sheets
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