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Emerson 560 restoration
#9

Finally able to get back to this radio. I worked through the circuit and did not see any mis-wiring issues. I rechecked voltage readings and all were the same except pin 4 on 1S5. It now was at 15 or 16 v instead of 0. Its most likely I simply measured incorrectly (perhaps wrong pin) last time since I did not really change anything. In any event the radio was still dead silent so I decided to check the speaker. It did not show an open voice coil and the transformer ohmed out OK. I put 1.5v across the voice coil by intermittently touching a lead to it...nothing. That seemed strange, I should at least hear some static since its a PM speaker. I figured, what the heck and moved to a 9v battery and a quick tap on the voice coil. I heard a loud pop...darn, did I just fry the voice coil? I went back to the 1.5v battery and lo and behold now I'm getting the static and clicking I expected. I think at the end of the day I simply had a stuck voice coil and the 9v jolt freed it up. Playing like a champ now. First thing I picked up was talk radio but then I got the Phillies vs Mariners...being a Philly phan on the west coast it was a real treat!

[Image: https://www.dropbox.com/scl/fi/l64hpty54...tbcd&raw=1]
[Image: https://www.dropbox.com/scl/fi/5mmfefhzo...bhxp&raw=1]


Messages In This Thread
Emerson 560 restoration - by klondike98 - 07-26-2025, 10:10 PM
RE: Emerson 560 restoration - by klondike98 - 07-30-2025, 10:11 PM
RE: Emerson 560 restoration - by Arran - 07-31-2025, 10:09 PM
RE: Emerson 560 restoration - by klondike98 - 08-01-2025, 12:33 PM
RE: Emerson 560 restoration - by klondike98 - 08-01-2025, 09:20 PM
RE: Emerson 560 restoration - by klondike98 - 08-02-2025, 07:43 PM
RE: Emerson 560 restoration - by RodB - 08-02-2025, 09:29 PM
RE: Emerson 560 restoration - by MrFixr55 - 08-03-2025, 08:42 AM
RE: Emerson 560 restoration - by klondike98 - 08-20-2025, 02:04 PM
RE: Emerson 560 restoration - by Paul Philco322 - 08-20-2025, 09:08 PM
RE: Emerson 560 restoration - by MrFixr55 - 08-21-2025, 01:37 AM
RE: Emerson 560 restoration - by morzh - 08-21-2025, 07:16 AM
RE: Emerson 560 restoration - by RodB - 08-21-2025, 10:03 AM
RE: Emerson 560 restoration - by klondike98 - 08-21-2025, 11:59 AM



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