DYNACO PAT-4 Assembly Manual - Page 8
Browse online or download pdf Assembly Manual for Amplifier DYNACO PAT-4. DYNACO PAT-4 20 pages. Power supply
Also for DYNACO PAT-4: Assembly Manual (16 pages)
Figure 2-New transistor with heatsink installed on PCB
Figure 3-MPSW45A Pinout
Figure 4-circuit board as seen from solder side. The modification replaces Q4
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