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#1
11-24-2009, 10:54 PM
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   $362 for five 183 globe tubes!I might as well sell the one I just picked up for $2 rather than try to get some more. FIVE GLOBE SHAPE RCA SPARTON 183 
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#2
11-25-2009, 06:26 PM
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I made a note about subbing 71A's for 183's in the Sparton Jr. In another forum someone said you'll need to change the bias resistor that goes from the center tap of the 5 volt filament winding from 1250 to 1800 ohms 2 or 5 watt. If you don't change this resistor, the 71As will exceed the design max plate dissipation. Credit for this goes to Chuck D. KB9UMF over at ARF:
http://antiqueradios.com/forums/view...e61baa8b0f2a2f
__________________
John
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