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Model 118 shadowmeter
jerryhawthorne
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#3

02-28-2014, 03:35 PM
Steve, I'm not certain when Philco started adding the shunt resistor (external to display) but I have done radios with and without. It was added I suspect when engineers started realizing if the shadow meter coil opened the radio would die completely. The shunt would allow it to continue to operate. Not certain if they made a change in resistance of the coil when they added the shunt.
Jerry
A friend in need is a pest!  Bill Slee ca 1970.
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Messages In This Thread
Model 118 shadowmeter - by Steve D - 02-28-2014, 11:11 AM
RE: Model 118 shadowmeter - by morzh - 02-28-2014, 11:21 AM
RE: Model 118 shadowmeter - by jerryhawthorne - 02-28-2014, 03:35 PM
RE: Model 118 shadowmeter - by hsusmann - 02-28-2014, 07:48 PM
RE: Model 118 shadowmeter - by Steve D - 03-02-2014, 05:14 PM



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