SR105B AMPLIFIER CONVERSION
| PARTS |
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| MATERIALS |
| Shure | Description | Qty. | Description |
Qty. | Part No. | |||
1 | 51A244 | Transformer, 70V | 2 | Locknuts, |
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| Output (T3) |
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1 | 55C131 | Switch, Slide, DPDT | 2 | Machine Screws, |
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| 6 4 ) |
| Phillips Round |
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| Head, | |
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| |
1 | 56A204 | Terminal Strip, 3- | 4 | Machine Screws, |
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| Phillips Head, | |
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1 | 90A2038 | Filter Circuit | 4 | Machine Screws, |
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| Board Assembly |
| Phillips Head, |
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| (A21 |
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| - | Wire, Hookup, |
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| 16 Gauge AWG, |
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| Stranded Copper, |
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| Vinyl Insulation |
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| - | Wire, Hookup, 20 |
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| Gauge AWG, Stranded |
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| Copper, Vinyl |
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| Insulation |
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| - | Solder, |
11
/I
I(
11
II II
TOOLS
Description
Pliers, Diagonal, or Wire Stripper
Pliers,
Screwdriver
Screwdriver, Phil- lips Head
Soldering Iron, Low Wattage
Wrench,
Two locknuts are presently securing lamp socket assemblies; two more are required.
*'Four machine screws presently securing
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| T 3 |
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| GRN | RED |
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| YEL |
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| r | BLK |
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| - | J4 - J 7 | |
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| WHT | |
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| WHT |
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| I- |
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| - |
TS 2 0 | 0 | 0 |
| d | 0 TS I |
COM | CT | 7 0 V |
| 2 8 V | GND |
FROM FILTER CIRCUIT |
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| s4- | OFF |
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BOARD PIN V |
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FROM MAIN CIRCUIT | YEL/BLK |
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BOARD PIN J |
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FROM FILTER CIRCUIT | BLU | 0 |
| 0 |
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BOARD PIN T |
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| 7 0 V |
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FIGURE 15. 70-VOLT CONVERSION: ADDED CIRCUITRY
16