murphy: B40 : Valve layout / tube layout

ID: 142076
This article refers to the model: Naval Communications Receiver B40 (Murphy Radio Ltd.; Welwyn Garden City)

murphy: B40 : Valve layout / tube layout 
03.Jun.07 19:00
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Martin Bösch (CH)
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Martin Bösch
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.

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