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SV, SV-a, SV-1 SEARCH RADAR


SV antenna (left).
SV antenna (left). This is not a photo from Pampanito.

Description.-An 8 cm. aircraft warning radar for use on submarines to supersede the SD.
SV-1 has instantaneous automatic volume control, fast time constant. Also uses SS indicating unit.

Number of operators.-One

Weight installed.-3,400 lb.

Power suppIy. 6 kva, 115 volts, 60 cps, 1 phase.

Maximum reliable range. (miles):
  Bombers, at 30,000 ft    7.5
  Bombers, at 10,000 ft    10
  Fighters, at 10,000 ft   12
  Battleships              12.5
  Cruisers                 15
  Destroyers               10
  Submarines, surfaced     7.5
Resolution:
  Range (yd.)              5.7
  Bearing (deg.)           5
Accuracy:                 SV       SV-1
  Range (yd.)          +-(50+0.1%). 15+-1%.
  Bearing (deg.)           +-2.      1/2.

Minimum range (yd.)      400.      400.
Indication and data output:
Range: SV uses SJ-1 indicator (5 inch A scope with 10, 30 mi. ranges). SV-1 uses SS range indicator (3 inch A scope 10, 30 mi. ranges).
Bearing: SV-1 uses SS bearing indicator (3 inch B scope with 4,000 yd. range).
P.P.I.: 5-inch scope. Provision for four radar repeaters.
Ranges: 4, 10, 40 miles on SV; 4, 10, 20, 80 miles on SV-1
Other: Provisions for IFF trigger and display.
Antenna specifications:
  Total weight (lb.)    500 including pedestal but
                          not torque tube.
  Feed                  Wave guide.
  Reflector:
    Type                Slotted csc2 parabola.
    Size                2 ft. high x 4 ft. wide.
  H.P. beam width:
    Horizontal          5.5 degrees.
    Vertical            60 degrees.
  Polarization          Horizontal.
  Gain (db)             30.
  Scan                  360 degrees at 0 to 6 r.p.m. by
                          motor. D-c motor control.
Transmitter specifications:
  Frequency (Mc.)       3400-3700.
  R-f Source            Magnetron.
  R-f Lines             Wave guide.
  Pulser type           Nonlinear coil.
  R-f peak power (kw)   500.
  R-f average power     SV-0.2; SV-1-0.15.(kw).
  Pulse rates (pps)     SV-300 +-5%;  SV-1-300 +-5%.
  Pulse length (micro sec) 1.
SV Radar PPI
SV Radar PPI.

SV Range Indicator
SV Range Indicator

Receiver specifications:
 Type               Superheterodyne.
 Stages             7 i.f. 2 video.
 Local oscillator   2K29.
 Intermediate freq. 60.(Mc.).
 Band pass (Mc.)    2 i.f.; 3 video.
 Mixer Crystal      IN21B.
 Noise, db above    13.
   theoretical.
Tube complement.-2 type 1B27; 1 type 2AP1; 1 type 2K29; 2 type 3B24; 4 type 5D21; 2 type 371B; 10 type 6AG7; 6 type 6AK5; 7 type 6AL5; 1 type 6S5GT; 18 type 6SN7GT; 1 type 6V6GT; 3 type 705A; 1 type 807; 1 type 4J36; 1 type 2X2; 5 type 5HP1; 17 type 6AC7; 4 type 991; 7 type OD3/VR150; I type 6Y6-G; 1 type 3B24; 1 type SFP7; 1 type 6H6GT; 2 type 6L6-GA; 2 type 991; 6 type SR4GY; 2 type 393A; 2 type C6J.

Literature.-Instruction book, Ships 340.

              Dimensions and weights
       Unit            Navy Type  Length Width  Depth  Weight   Pampanito
                                  Inches Inches Inches Pounds   Serial #
Antenna projector        66AJV      27    48      36    400
Transmitter-receiver     43ACW      22    21      70    800   C.R.
Echo box                 13ABG      16     8       7     10
Torque tube drive        10AFB      16    22      30    500
 unit.
Motor drive gear unit    10AFD      11    18      13    125
Motor drive shaft                  (#1)  (#1)    (#1)    14
Spline shaft drive unit. 1OAFC      11    17       9     50
Spline shaft                       (#2)  (#2)    (#2)   100
Spline shaft upper       10AFE       8     6       8     25
 bearing unit.
Synchro unit             21ADE      12    17      11     90
Main control unit        23AGD      18    21      18    100   #28,C.R.
Range unit               23ACC      19    10       7     60   #28,C.R.
PPI                      55ADE      20    12      15    120   #28,C.R.,#6,C.T.
Range indicator          55AGE      21    17      13    110   #28,C.R.
Regulated rectifier      2OADN      27    20      18    250   #28,C.R.
Auxiliary rectifier      20ADO      27    20      18    200   #28,C.R.
Wave guide switching     24AAK      20    13       9     75   C.R.
 unit.
Dummy antenna            66AJW      20                   11   C.R.
Motor controller unit.   23AGE      12    12      14     50   #28,C.R.
Motor control rectifier. 2OADP      27    20      18    300   #28,C.R.
Antenna drive motor.     21ADC      21    11      11    260
Adaptor control unit     23ABX       5     6      10      7   C.T., C.R.
Frequency power meter    TS-295/UP  10     9       9
(#1) 1.5 diameter. Length cut on job.
(#2) 2.25 diameter. 14' in length.

REFERENCES:

The information enclosed here is excerpted from:
Catalogue of Naval Electronic Equipment-April 1946- NavShips 900,116.

 

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Version 2.00, 11 Sep 2006