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Old 05-14-2016, 06:54 PM
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zeno zeno is offline
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Join Date: Mar 2013
Location: New Hampshire
Posts: 4,672
On IC's it may not have used them. They went disco in the
80's IIRC. The way the IF is built I would NOT go
there unless needed.

If the main filter is not the hum check the outputs next
& any transistors direct coupled to them. They will probably get HOT fast.
Its probably the transistors mounted on the chassis in round
holders.

73 Zeno
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