07-10-2012, 06:46 PM
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Silvertone 8103a and Coronado 990b
07-10-2012, 07:15 PM
As far as I know the Coronado sets were sold by the Gamble-Skogmo department store chain. I don't know who actually manufactured them, probably Wells Gardner, Belmont, Continental Radio & Television, and other private lable radio makers. The schematics are always listed under Gamble-Skogmo if you need to find one.
Is the speaker missing from the Silvertone? Is that why you need one? Regards Arran
07-10-2012, 10:33 PM
Silvertone here it's a 10 inch PM type Primary impedence (not resistance) should be 5,000.
The loctal output tube 7C5 is similar to the octal 6V6. More tube information here: http://www.nj7p.org/ There are methods to determine what the secondary impedence (not resistance) for you to google, but most likely an efficient 8 ohm speaker would be fine. Do nopt operate the set without a speaker. More info on the Silvertone here: http://www.nostalgiaair.org/PagesByModel...017828.pdf The Coronado info is here http://www.nostalgiaair.org/PagesByModel...007213.pdf All this stuff is free
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