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Old 22nd Nov 2020, 12:34 pm   #5
DonaldStott's Avatar
Join Date: Aug 2015
Location: Glasgow, UK.
Posts: 1,143
Default Re: Bush DAC90A Speaker Problems

Swapped the speaker over for the one from a DAC10 and the buzzing noise has stopped, even at low volume!

So this points toward the speaker being the problem??

@Cobaltblue - thanks Mike, the grid coupling caps were replaced and preliminarily checks carried out before first live switch on, with lamp limiter of course. I'm familiar with most of the DAC90A modifications thanks to kaleee20 and these will be implemented as I progress. I've also got a spare UL41 which I will substitute. The reservoir and smoothing caps in the big can will be tested and replaced if necessary.

I've never had a speaker sound as bad as this and wonder if it's a lost cause? Is it worthwhile even attempting to fix the detached speaker suspension if I have rust and dirt etc. in the voice coil?
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