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Alignment for the DX 88HL Frequency Counter (EPT210010) (This is the older/larger model)

  1. Set band button to high
  2. Set band switch to "A"
  3. Set mode switch to "AM"
  4. Set clarifier fine/coarse to 12 o'clock
  5. Set channel selector to 1
  6. Connect oscope to C618
  7. Adjust T601 for peak
  8. Connect frequency counter to IC 608 pin 9
  9. Adjust VC603 for 3.27675
  10. Connect frequency counter to IC 607 pin 1
  11. Set mode switch to "USB"
  12. Adjust T602 for 2.67310
  13. Set mode switch to "AM"
  14. Adjust VC602 for 2.67375
  15. Set mode switch to "LSB"
  16. Adjust VC601 for 2.67435
  17. Set mode switch to "USB"
  18. Re-adjust T602 for 2.67315
  19. Repeat steps 13 through 18 until all frequencies are correct