[NJARC] Current limiting Devices

[Charles Blanding]

Going by the tube line up, this radio has the famous "Autodyne Converter"
circuit. Look it up for a description. In a nutshell, it is an all American
4 that was a lower cost radio for inner city use where signals were strong
and peoples incomes were low. GE made clock radios with this same circuit.
The resistor is needed since the tube lineup is 12 volts short of the All
American 5 filament total to make up the line voltage. I doubt that surge
protection feature is needed with the stability of today's power line
voltage. Back when this radio was new however, power surges would have been
more of an issue, especially in big city industrial areas where many of
these radios were sold. 

-----Original Message-----
From: NJARC [mailto:njarc-bounces at mailman.qth.net] On Behalf Of
antqradio at sbcglobal.net
Sent: Tuesday, November 29, 2016 1:11 PM
To: njarc at mailman.qth.net
Subject: Re: [NJARC] Current limiting Devices

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