Dynaco Audio Research Mod St-70-c-Hum Problem?

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My unit hums and it is getting worse what do I do to fix?
John

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Topic - Dynaco Audio Research Mod St-70-c-Hum Problem? - jl1024 22:00:04 07/08/01 (3)

Re: Dynaco Audio Research Mod St-70-c-Hum Problem? - overclocker 22:08:55 07/08/01 (2)

How high have you measured the St-70 power supply voltage to? - PeterCapo 15:21:20 07/10/01 (1)

Re: How high have you measured the St-70 power supply voltage to? - Overclocker 16:16:02 07/10/01 (0)

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