[Amps] TL-922 crackling noise

[Ludo de Boeck]

Hi,

I decided to get rid of my TL-922, which acted as my backup amp for about 
1.5 years. Before selling it I just wanted to switch it on again, to see if 
the Voltage was still ok (it was not connected to the exiter at that time). 
After having enjoyed the sound of a TL922 again for a few seconds, the amp 
started to make a crackling , crisping sound. The meter showed that the HV 
was kinda fluctuating a bit. Off course we switched off the amp soon after.
Before I tested I removed some dust close to the fan, but after the 
'failure' i checked it again , and it seemed that I had indeed forgotten to 
clean some parts (the choke next to the tubes for instance). The rest looked 
rather dust-free.
We will now clean the entire amp, to make sure there's no dust left before 
we start operating it.
Anyone has experienced this before ? Any ideas, comments, are welcome !

Regards,

Ludo

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