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                        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.

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Thats everything I hold up to 1989 that covers the SB-301.  Enjoy!

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                        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.

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