The FL2 was designed as a replacement for the FL1 and was styled in the aluminium wrap-around case. It could be configured as dual BP filters or independantly tuned HP and LF filters. For some reason the auto-notch of the FL1 was omitted, this could be purchased as a retro-fit board FL2/A. This was latterly available as the FL3 with the auto-notch fitted.

• Download FL2 operating instructions PDF (760kb).

Thanks to Jim G4RGA I now have the full set of instructions as supplied with the FL3. This comprises of the FL2 instruction sheet, a spec sheet and an additional sheet for the auto-notch facility.

• Download FL2 operating instructions (1Mb).
• Download FL3 data sheet (300kb).
• Download FL3 additional instructions (240kb).