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Shadow meter question
#1

Hi,

I have a Philco 37-670 with an inoperative shadow meter (the newer style). Not familiar with this meter; it's the first time I've dealt with one. Pretty cool! Anyway, here is what I know and have done so far. Any suggestions?

1. The meter coil is good. It measures out to about 1,450 ohms.
2. I removed the magnet from the coil assembly. I've read that they lose their magnetism. I tried to remagnetize it with a neodymium magnet and think I succeeded; it's now magnetized enough to pick up a small paper clip.
3. I reinstalled the magnet, etc. The shutter that swings back and forth is in good condition, moves freely.
4. With the radio on, I am getting about 215 volts on either side of the shadow meter coil. The voltage doesn't change much (a few volts) when I tune in and out of a strong station. The vane moves a touch, but barely enough to make much difference in the width of the shadow.

Any suggestions on what to try? Should I be seeing a greater variance in voltage in/out of stations? 

Thanks! Here's the schematic:

http://imgur.com/NozIIBg


Messages In This Thread
Shadow meter question - by Diverted - 02-04-2015, 11:56 AM
RE: Shadow meter question - by klondike98 - 02-04-2015, 12:02 PM
RE: Shadow meter question - by Steve Davis - 02-04-2015, 12:22 PM
RE: Shadow meter question - by Diverted - 02-04-2015, 12:46 PM
RE: Shadow meter question - by Diverted - 02-04-2015, 04:28 PM
RE: Shadow meter question - by codefox1 - 02-04-2015, 05:22 PM
RE: Shadow meter question - by klondike98 - 02-04-2015, 07:04 PM



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