Home Forums Electronics Restoration RCA Nipper V schematic discrepancy

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  • #7453
    Les Dickson
    CVRS Member

    I just acquired a RCA Nipper V and found a schematic at pacifictv.ca. However, R2 is displayed as 270 K in one section (p4 – parts list) and 470 K in the Chassis View (also p4). It’s displayed as 470 K on p3 in the schematic. Anyone experienced anything similar? Do I assume 470 K is correct because it’s displayed that way 2/3 time?

    #7455
    Les Dickson
    CVRS Member

    I tried uploading the schematic as PDF but it failed.

    #7460
    John Greenland
    CVRS Member

    Evening Les;

    A cute little radio. I have seen a couple but never owned one. In looking at the schematic, R2 is associated with the grid bias on the IF tube and thus the AVC for the radio. It is in a circuit which normally draws no current, so its value is probably of little effect on the radio. In some radios there is actually no resistor at all in this sub-circuit of the radio.
    Good luck with the restoration.
    Regards; John G.

    #7461
    Jean Marcotte
    CVRS Member

    In my RCC archives, R2 is 470K everywhere and it is a standard value for the time. Other standard values would be 220K or 330K so 270K would have to be for very special use wich is not the case here. So go with the yellow-violet-yellow.

    Jean

    #7464
    Les Dickson
    CVRS Member

    Thanks John & Jean. I’ll go with the 470K. Much appreciated.

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