RECEIVING RF SIGNAL DISTRIBUTION - (reference NAVSHIPS 91047 and
NAVSHIPS 900,121)
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| SYSTEM |
RF and AF Signal Distribution System Type A,
B, C
- for communications stations - photo
and info page |
manual is NAVSHIPS 91047 - please send
me e-mail if you have a copy
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| AN/FRA-3 |
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RF switching group for shore station installations
Allows 5 operators to remotely select one of 40 antennas
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RF distribution diagram
NAVSHIPS 91500 - please send
e-mail if you have a manual or any parts of AN/FRA-3
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| CU-837/SRC |
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network matching switch
2-3 mc
3-5 mc
5-17 mc
7-12 mc
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| J-237/G |
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RF jack panel used in shore station installations - contains
eleven UG-294/U feed-through jacks
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UG-294/U - Navy Type jack feed-through to UHF jack on
rear
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manuf
CN - National Electrical Supply |
| J-238/G |
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RF bridging jack panel used in shore station installations - contains
eleven NT-491729 modules
 |
NT-491729 module with 4 front NT-49120
jacks and 3 rear UHF
jacks all tied together
 |
manuf CIA - Dumont Radio
CIA-491729
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| J-239/G |
need photo |
RF switching jack panel used in shore station installations - contains
eleven NT-491688 modules
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NT-491688 module
 |
"Normal-Through" operation - the loop between two UHF
jacks on rear is broken when NT-49121 plug is inserted in front
jack
manuf CIA - Dumont Radio
CIA-491688
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NT-23404
NT-23405
NT-23406
NT-23407 |
NT-23406 |
receiving antenna patch panels
23404 -
30 antennas, 30 rcvrs
23405 -
18 antennas, 18 rcvrs
23406 -
9 antennas, 18 rcvrs
123407 - 2 antennas, 12 rcvrs
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each antenna (or interspace cable) is connected to 4 jacks,
1 directly and 3 through 600 ohm decoupling resistors
uses NT-49120 jacks and NT-49121
plugs
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| NT-28006A |
need photo |
Receiver Protective Device
50 or 100 watt light bulb in a cylindrical can to protect rcvr front end,
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| NT-49120 |
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mating jack for NT-49121 plug
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NT-49121
NT-49121A |
photo thanks to W7QHO |
Connector used for RF patch cords
(also for RBB/RBC and other receivers)
Type CN-49121A Antenna Plug, Navy Stock Number
N17-C-71120-4869
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Connector, Plug: 1 round female contact; straight type;
over-all 2-7/8" long by 13/16 " diameter; RF connector;
cylindrical body; brass; nickel plated; Bakelite insert; 13/32 max cable
opening.
diagram thanks to N7RHU |
manuf
CN - National Electrical Supply
CN-49121A |
NT-49122
NT-49123
NT-49150 |
need photos |
Patch cords using NT-94121 plugs
49122 - 18" long
49123 - 36" long
49150 - 48" long |
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|
SA-136/G
SA-137/G
SA-138/G |
need photos |
RF switch panels used in shore station installations
SA-136/G is 20 position panel
SA-137/G is 40 position panel
SA-138/G is 60 position? |
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SA-274/U
switch |
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4 position selector switch |
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SA-275/U
switch |
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6 position selector switch |
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| SA-598/U |
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switching jack module - replaces NT-491688 in J-239/G but
with TMC QDS front panel jacks
Note - Mating plug is UG-968/U |
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manuf TMC model SW-195 |
| SB-346/S |
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antenna patch panel
12 receivers, 3 antennas
type C connectors for patch cords?, type N connectors for rcvrs &
antennas - need more info
 |
 |
Photos to left look like two units in one cabinet?
manuf Federal Television
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| SB-931/U |
need better photo |
replaces J-237/G panel but with eleven TMC QDS front panel
jacks |
QDS on front, UHF on rear |
manuf TMC model QDP-411A |
| SB-932/U |
 |
RF switching jack panel used in shore station installations
- eleven modules
- replaces two J-239/G - uses two TMC QDS jacks on front and two UHF jacks
on rear |
Dual "Normal Through" - the loop between two UHF
jacks on rear is broken when QDS plug is inserted in either front
jack |
manuf TMC model SPP-3
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