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FT-990 documentation
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Scan of original FT-990 operating manual
FT-990 Technical Supplement LPF schematic
MD-100 owner's manual
QST November 1991 product review for FT-990
FT-990 LPF section of schematic with meter readings
SP-6 external speaker and LL-5 phone patch user manual
FT-990 Service manual
NT7U - FT-990 receiver audio hiss reduction modification
FIF-232C owner's manual
FT-990 options set from front panel
Installation of optional IF filters in the FT-990
CAT interface for Yaesu HF transceiver
FT-990 schematic on 44 inch by 31 inch paper
SQ5BPF's FT990 External relay wetting circut mod
Sound card interface schematic
FT-990 scan of original brochure
FT-990 47Mhz IF out mod
MC-60 to FT-450 wiring diagram
G7VOT's manufacturing dates from serial number
FT-990 47Mhz IF out mod schematic
DVS-2 digital voice recorder user manual
FT-990 technical bulletin dated 12/1992 for improved IMD
FT-990 low pass filter mod - board changes
HB3YDH FT-990 & Signalink hints
K1MMI's FT-990 troubleshooting suggestions
FT-990 IMD mod for noise reduction
Assorted CAT command strings
K1MMI's notes on FT-990 ROM versions
FT-990 RF board tap point
FT-990 band data cable
DL6MBI's notes on FT-990 ROM versions
Place tuner in the RX/TX path
FIF-232C owner's manual
FT990 tuner mod before
SP-6 external speaker and LL-5 phone patch user manual
FT990 tuner mod after
Yaesu FT-817ND CAT Display In Python
FT-990 RF unit - location of T1005 and T1010