-------------------------------------------------------------------------------------------------------------------
                        July 24, 1978
SB-301                                          Bulletin No:
Ham Receiver                                    SB-301-1

                                  LMO Drift; Intermittent Frequency Shift

Check for a dirty or corroded phono conector on the rear of the LMO.
Clean if necessary.
-------------------------------------------------------------------------------------------------------------------
Thats everything I hold up to 1989 that covers the SB-301.  Enjoy!
-------------------------------------------------------------------------------------------------------------------
                        November 25, 1970
SB-303                                          Bulletin No:
Ham Receiver                                    SB-303-1

                     SB-303 Operation With SB-610 Monitor Scope

Envelope monitoring with the SB-610 is satisfactory with the SB-303.
Using the 1.0 uF coupling capacitor provided, approximately 1/4"
peak-to-peak deflection is obtained with an S-9 signal.  Connection is
made to the collector of Q503, 3rd IF Amp. on the IF/Audio board.
Retuning of [PN 52-125], T-503, is not required.  However, should more
deflection be required, a larger capacitor could be used and would
probably require a slight retuning of T-503.
--------------------------------------------------------------------------------------------------------------------
