[NJARC] Help with an Old TV

[Grant Buford]

Hi Marty,
 Thanks for the tip.  I got the Howard Sams information for this set and checked
the voltages with those shown in the voltage table.  Interestingly the set
information says the B+ from each 5U4 should be 280VDC, but I actually measure
460VDC.   The B+ was higher than that shown all over the set.  I was very
confused.  I have replaced all of the old paper caps but have not replaced the
large multi-section caps.
Grant

Radiomf@aol.com wrote:

> Hi Grant.
>  The lack of both height and width would indicate low B+. (not HV) This could
> also have an effect on the picture  quality. Check to see if the rectifier is
> weak. Some early sets used 2 rectifier tubes, usually 5U4s. IF the set uses
> seleniums, they also would be suspect. If this thing uses a voltage doubler
> circiut, make sure those caps also are ok.
> Marty Friedman
>
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