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Help me diagnose this noise.
Help me diagnose this noise.
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Old 11th January 2019, 12:47 PM   #1
rabading is offline rabading
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Default Help me diagnose this noise.

Thinking of picking up a old Yamaha amplifier but the guy has moved it to plug it in downstairs and its started making this noise. Doesnt sound like really clicking to me. Sounds to squeaky and high pitched.

IMG_0606.mp4 - Google Drive

Hopefully the link will work.
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Old 11th January 2019, 12:58 PM   #2
Mooly is offline Mooly  United Kingdom
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Help me diagnose this noise.
Hard to say. It reminds me of the sort of noise faulty SMPS can make...

Wound components and even transistors can make noises like that under certain operating conditions. It could be instability of some sort, there are many possible causes.

Sorry, no instant diagnosis on that one, you need to do more detailed tests and also just listen and locate the part making the noise.
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Old 11th January 2019, 12:58 PM   #3
dhaen is offline dhaen  Europe
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Are speakers connected?
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Old 11th January 2019, 01:43 PM   #4
rabading is offline rabading
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Thank you, I know it’s hard to diagnose problems without first hand experience. It’s just I’ve never come across a noise like that before. The problem is it’s a three hour drive to pick it up, so that’s the only thing I’ve go to go on at the moment.
No I don’t believe any speakers are connected to the amplifier.
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Old 11th January 2019, 01:53 PM   #5
JMFahey is offline JMFahey  Argentina
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In any case, its something to stop the purchase.

Neither he nor you will be able to troubleshoot and solve that within the time frame and possible $$$ involved in the transaction.

Im certain its something which can be solved, but who will pay the Tech fees?
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Old 11th January 2019, 01:59 PM   #6
rabading is offline rabading
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its with a yamaha ct1010 as well and the price is good enough that i should recover most of my cost from selling on the tuner. time isn't really a factor, it would be a shame that a ca1010 goes to trash just for a bit of time
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