SB-008

Service Notes on R-599A/D                            11-2-77

1.  VFO drift:  Bad Q1 3SK22 (Y) (X40-0016-18).  Also change R1 from
    270K to 1 Meg Q1 bias.

2.  Low sensitivity:  Check Q1 3SK22 (GR)  (X44-0020-00).

3.  No transceive operation:  Check for dirty contact of transceive switch
    or broken wires at switch.

4.  Receiver sensitivity:  Q4 2SC733 (Y) on IF unit (X48-0011-00).

5.  No receive with transceive switch in the TX or reverse:  Check for cut
    coax at VFO terminal of IF unit (X48-0011-00).

6.  No VFO receiver:  Check L3 at Q1 in VFO (X40-0016-00).

7.  Receiver 10 to 20 dB down:  Check protection diodes D1, D2 1N60 at
    (X44-0020-00).

8.  FM doesn't work:  Check T-8 discriminator transformer on (X48-0011-00).