Martin Bösch
CH Articles: 260
Schem.: 61
Pict.: 1154
03.Jun.07 19:00
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murphy: B40 : Valve layout / tube layout
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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.
This article was edited
03.Jun.07 19:17 by
Martin Bösch .
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