Mercury Model 501 Component Substitutor Manual $8.50 Mercury Model 501 Component Substitutor Manual quantity Add to cart Category: Mercury Description Description For sale is reprint of Mercury 501 Component Substitutor Manual. Manual is 11 pages long, include part list and Circuit Diagram . Related products Mercury 1100 1100A 1100B Tube Chart 1978 $9.99 Add to cart Mercury 1000 Tube Tester Tube Chart Updated 1971 version $8.49 Add to cart MERCURY 1101 Tube Tester Manual and Tube Charts $8.49 Add to cart Mercury 1100CK Tube Tester Assembly Manual $8.99 Add to cart