Quote:
Originally Posted by radio nut
. . . . . . . . . . .Yes there is a high voltage cap below the high v rectifier . . . . . . . . .
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The most common basic 1951 Muntz chassis was used in set model M31 and a bunch of other adjacent numbers indicating cabinet variations . The M31 schematic in Beitman's 1951 page 101
does NOT show a 500mmF underneath the 1B3, but it
does show an aquadag coating on the CRT. To lessen horizontal streaking on a CRT one needs some HV capacitance. This could be either an early repairman's fix or a factory modification to use some 16DP4A's that Muntz or the repairman happened to have.
When one looks at the three alternate CRTs used with this chassis, one will see both the 19DP4A and 16RP4A carry an aquadag coating while the 16DP4A has no aquadag! So, this chassis could be a production line substitution where Muntz used a different CRT that they purchased for a few cents less than the cost of a 500mmF doorknob, or it could be just a serviceman's replacement CRT because he could not quickly locate a correct tube.
Jas.