Big Game
Stern Electronics, 1980You're currently viewing posts by Pinsider G-P-E.
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VR1 was originally a 1/2W zener diode 1N959B. 1N959B's are somewhat hard to find, replacement of same size is 1N5237B. The 1W version (larger yet acceptable replacement) would be 1N4738A.
To check VR1 -- With black meter to ground - measure both sides of VR1 to see if it is OK. Cathode (banded) side should be roughly 12V (should be same as TP2). Anode (non-banded) side should be approx 8 volts.
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Omaha, NE