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  1. S

    Robyn SB 520 D

    Thanks for all the help got the power supply fixed. It was the capacitor C418 .1 on TR401 Voltage Regulator. Thanks Again Dale
  2. S

    WTB Rf Power Meter

    WTB A Rf power meter for Robyn 520 D Thanks Dale
  3. S

    #673

    #673
  4. S

    Rf power signal meter

    WTB RF power signal meter for Robyn 520 D Thanks Dale
  5. S

    Robyn SB 520 D

    Sorry yes I did misidentified the terminals of TR302 and yes I did switched base and emitter of TR301. I looked at the schematic and it shows a picture of TR302 and shows indent then says front view I was confused.On TR 301 is says bottom view confused again. If i check the voltage at T401 red...
  6. S

    Robyn SB 520 D

    Touched up all the soldier joints in the power supply made no difference in the voltage on B-C
  7. S

    Robyn SB 520 D

    This is the first radio I have ever tried to trouble shoot so hang in there with me. D406 Pin 1 24.37 DCV P 2 12.55 P 3 00.00 P 4 12.56 TR401 C 24.33 E 15.68 B 16.30 TR302 C 24.32 E 5.968 B 16.33 D302 16.38 TR301 C 5.970 E 6.71 B 5.926 D301 5.911
  8. S

    Robyn SB 520 D

    Thanks a lot for the reply checked the zener diodes and transistors they check ok.. Cleaned the trimmer pot it is working. Where do we go from here ? Thanks again Dale
  9. S

    Robyn SB 520 D

    The power supply is putting out to many volts. I have changed the two electrolytic capacitors. C302 C304 I have checked the value of the resistors. When I adjust RT 301 variable resistor if I go to the right the volts start to climb if I go to the left they start to drop when I get to center...
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