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Antique Radio Technical Forum
L-49B Ballast tube. What are the resistor values inside?

Posted by Dave Froehlich on 04/27/2010 17:03

Warren,
It turns out that this works very well. I made the mistake of connecting the capacitor from pin 3 to pin 7 instead of to pin 8. I made the correction and the "capacitor" ballast works just fine and no modification has to be made to the radio at all.

Thanks,

Dave
:Warren,
: I do not want to "modify" the radio to work with a non-standard ballast tube. Everything has to be in the Ballast tube and nowhere else. In the article about these capacitor ballast tubes, the person uses a resistor in the ballast tube for the dial lamp and it works. How does he get it to work, is what I'd like to know.
:
:Thanks,
:
:Dave
:
::To make the dial lamp work, use a #44 bulb. Lift the last tubes heater connection going to ground, now add the dial lamp in series with that last tubes heater going to ground. Put a 47 ohm 1 watt resistor across the dial lamp. ( A Shunt ) No need for any resistor in place of the ballast tube for the dial lamp.
::
::IPAddress: ***.81.198.0
:
:IPAddress: ***.58.185.194

IPAddress: ***.58.185.194


L-49B Ballast tube. What are the resistor values inside? 
Dave Froehlich 01/13/2010 20:42 
Warren 01/13/2010 23:32 
Dave Froehlich 01/14/2010 17:01 
Warren 01/14/2010 19:05 
Warren (P/S) 01/14/2010 20:39 
Dave Froehlich 01/15/2010 16:31 
Warren 01/15/2010 17:04 
Dave Froehlich 03/17/2010 15:00 
Warren 03/17/2010 15:32 
Dave Froehlich 03/17/2010 15:49 
Dave Froehlich 03/17/2010 15:50 
Dave Froehlich 04/27/2010 15:15 
Warren 04/27/2010 16:00 
Dave Froehlich 04/27/2010 16:12 
Dave Froehlich 04/27/2010 17:03 
Warren ( That's cool then ) 04/27/2010 19:46 
Warren 04/27/2010 17:18 
Dave Froehlich 04/27/2010 15:21 
Chuck 02/09/2010 02:04 

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