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Naval Communications Receiver B40

Naval Communications Receiver B40; Murphy Radio Ltd.; (ID = 353799) Receiver-C
 
Naval Communications Receiver B40; Murphy Radio Ltd.; (ID = 353801) Receiver-C
 
Naval Communications Receiver B40; Murphy Radio Ltd.; (ID = 353802) Receiver-C
 
Naval Communications Receiver B40; Murphy Radio Ltd.; (ID = 353803) Receiver-C
 
Naval Communications Receiver B40; Murphy Radio Ltd.; (ID = 353805) Receiver-C
 
Naval Communications Receiver B40; Murphy Radio Ltd.; (ID = 353806) Receiver-C
 
Naval Communications Receiver B40; Murphy Radio Ltd.; (ID = 353807) Receiver-C
 
Naval Communications Receiver B40; Murphy Radio Ltd.; (ID = 353808) Receiver-C
 
Naval Communications Receiver B40; Murphy Radio Ltd.; (ID = 353811) Receiver-C
Naval Communications Receiver B40; Murphy Radio Ltd.; (ID = 359772) Receiver-C Naval Communications Receiver B40; Murphy Radio Ltd.; (ID = 96257) Receiver-C
Naval Communications Receiver B40; Murphy Radio Ltd.; (ID = 96258) Receiver-C Naval Communications Receiver B40; Murphy Radio Ltd.; (ID = 96259) Receiver-C
Naval Communications Receiver B40; Murphy Radio Ltd.; (ID = 309375) Receiver-C Naval Communications Receiver B40; Murphy Radio Ltd.; (ID = 359773) Receiver-C
Naval Communications Receiver B40; Murphy Radio Ltd.; (ID = 359775) Receiver-C Naval Communications Receiver B40; Murphy Radio Ltd.; (ID = 468548) Receiver-C
Naval Communications Receiver B40; Murphy Radio Ltd.; (ID = 654146) Receiver-C Naval Communications Receiver B40; Murphy Radio Ltd.; (ID = 654147) Receiver-C
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Naval Communications Receiver B40; Murphy Radio Ltd.; (ID = 359772) Receiver-C
Murphy Radio Ltd.;: Naval Communications Receiver B40 [Receiver-C] ID = 359772 548x600
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For model Naval Communications Receiver B40, Murphy Radio Ltd.; Welwyn Garden City:
Variant C
 
Country:  Great Britain (UK)
Manufacturer / Brand:  Murphy Radio Ltd.; Welwyn Garden City
Year: 1953–1956 Category: Commercial Receiver (may include amateur bands)
Valves / Tubes 14: CV4014 CV2128 CV4009 CV4014 CV4015 CV4015 CV131 CV4007 CV4007 CV131 6BA6 0A2 CV493 CV493 CV2136
Main principle Superhet with RF-stage; ZF/IF 500 kHz; 2 AF stage(s)
Wave bands Broadcast plus more than 2 Short Wave bands.
Details
Power type and voltage Alternating Current supply (AC) / 115/230 Volt
Loudspeaker Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 7 cm = 2.8 inch
Power out 2 W (unknown quality)
from Radiomuseum.org Model: Naval Communications Receiver B40 - Murphy Radio Ltd.; Welwyn
Material Metal case
Shape Boatanchor (heavy military or commercial set).
Dimensions (WHD) 13 x 19 x 16 inch / 330 x 483 x 406 mm
Notes The Murphy B40 Series of Naval Communications Receivers are receivers for shipboard use (British Navy, submarine), coverage 640 kHz to 30600 kHz in five ranges, IF-selectivity 1kHz/3kHz/8kHz, BFO. Also fix-frequency xtal-option. Model suffix A, B, C or D, the B40A, B40B, B40C and B40D, are some in details different variants. Also referred as "lighthouse- or tower-receiver".
Net weight (2.2 lb = 1 kg) 46 kg / 101 lb 5.1 oz (101.322 lb)
Price in first year of sale 500.00 BP
Collectors' prices  
Mentioned in Shortwave Receivers - Past & Present (3rd ed.)

Model page created by Alexander Küffer. See "Data change" for further contributors.



All listed radios etc. from Murphy Radio Ltd.; Welwyn Garden City
Here you find 319 models, 207 with images and 201 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.



 


Forum contributions about this model
Murphy Radio Ltd.;: Naval Communications Receiver B40
Threads: 2 | Posts: 2
Hits: 3099     Replies: 0
murphy: B40 : Valve layout / tube layout
Martin Bösch
03.Jun.07
  1 B40/A/B/C
Circuit Reference Stage CV no. Equivalent
V101 First RF CV327 EF52
V102 Second RF CV303 EF22
V103 Mixer CV302 ECH22
V104 Oscillator CV327 EF52
V201/2/3 1st, 2nd, 3rd IF CV303 EF22
V204 Det. and AGC CV140 EB91, 6AL5, CV4025
V205 Noise Limiter CV140 EB91, 6AL5, CV4025
V206 BFO CV303 EF22
V301 AF Amp CV303 EF22
V302 Output CV304 or CV2136 EL22, 7C5 or 6BW6, 6061
V303 Rectifier CV346 or CV1790 EZ22 or 7Z4
V304 Stabiliser CV287 150B3

B40/D (FSK Option)
Circuit Reference Stage "Preferred"
CV no.
Equivalent "Reliable"
CV no.
Equivalent
V101 First RF CV138 EF91 CV4014 6064
V102 Second RF CV454 EF93 CV4009 5749
V103 Mixer     CV2128 ECH81
V104 Oscillator CV138 EF91 CV4014 6064
V201/2/3 1st, 2nd, 3rd IF CV131 EF92 CV4015 M8161
V204 Det. and AGC CV140 6AL5 CV4007 5726
V205 Noise Limiter CV140 6AL5 CV4007 5726
V301 AF Amp CV454 EF93 CV4009 5749
V302 Output CV2136 6BW6 CV4043 6061
V303 Rectifier CV493 6X4 CV4005 6063
V304 Rectifier CV493 6X4 CV4005 6063
V305 Stabiliser     CV1832 0A2

In most cases, "Preferred" valves were fited by the manufacturer, and when replacements were necessary, "Reliable" types were used if available. Excerpt from original manual.
 
Hits: 3028     Replies: 0
murphy: Murphy B40 variants
Martin Bösch
02.Jun.07
  1
Model No. /
Admirality Pattern
 
B40 prototype
57140
Typenumber engraved in flat cover above dial
modes CAL, R/T, Tune system, CW high/low, listen through
dial lock in left lower corner of main tuning knob.

B40A
57140A
Typenumber above dial moulded in cast front panel
modes CAL, R/T, Tune and CW high/low.
Speaker switch lefthand under speaker grid.
Physical changes in layout, mechanical changes to facilitate maintenance, substitution of improved components.
 
B40B
57140B
Typeplate above dial screwed
Re-designed tuning drive, addition of crystal filter in circuit, note filter deleted.
AGC switch left under speaker and speaker switch fitted above mains switch.

B40C
57140C
Typeplate above dial screwed,
AGC switch left under speaker and speaker switch fitted above mains switch.
RF assembly modified to allow Common Aerial working (use of several receivers on same antenna).

B40D
57140D
Typeplate above dial screwed
Modes CAL, R/T, Tune, FSK narrow CW high/low and FSK wide high/low
additional control for Oscillator Trim (fine tuning) left under CRYSTAL switch.
Different valve layout (additional rectifier, EF9x series).

B41 VLF variant
Typenumber above dial moulded, lettering printed on faceplate.

B41 VLF variant
Typeplate above dial screwed, faceplate with lettering screwed on set.

62B VLF / HF general coverage variant.
Typeplate screwed above dial, AGC switch underneath speaker grid, speaker switch above mains switch.
 
Murphy Radio Ltd.;: Naval Communications Receiver B40
End of forum contributions about this model

  
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