I noticed that the longer i used my Peavey Vypyr Vip3 practice amp. The more it was gaining a hiss and the sound quality was going down. Checking the back of the cabinet, it was very warm. So i dropped the chassis out of the amp, to see if any thing was wrong. Everything appeared to be OK. I suspected the problem stemmed from too much heat retention. The problem it seemed was the fine Chinesium fin-less aluminum heat sink mounted to the steel chassis. So i mounted a small finned heat sink to the aluminum original and "heat retention begone". On testing most of the hiss went away and the sound quality remained steady.
Now for the Playstation part.
Unfortunately my due care in cleaning up the tapped holes, wasn't as thorough as I had thought. So shortly after reassembly, the faint smell of magic smoke became apparent in the room and the amp shut down. :duh:
Luckily all was not lost. A quick tear down located the stray fleck of aluminum and the problem it caused back on the power board. Enter the mighty multi meter to find absent voltages on one of the outputs. At 1st i couldn't locate the problem, But a magnifying glass (ya I'm getting old) turned up the culprit. Enter one fried SMT Ferrite bead. In English-i had killed a filter choke that was about 1/2 the size of a grain of rice. I located the circuit diagram and parts manifest PDF on line, luckily.
So it's 10 O'clock PM. Where the heck am i going to find one these this time of night. :smack:
Into the cash of dead circuit boards for parts i go.
Guess what i found on the back of dead PS3. :biglaugh:
So a long story short. Now my Peavey is a little bit Playstation. :werd:
So the moral of this is, do as i say and not as i do. If you find the need to augment your solid state amp cooling. Completely remove your heat sink before any drilling and tapping.
Cheers
Now for the Playstation part.
Unfortunately my due care in cleaning up the tapped holes, wasn't as thorough as I had thought. So shortly after reassembly, the faint smell of magic smoke became apparent in the room and the amp shut down. :duh:
Luckily all was not lost. A quick tear down located the stray fleck of aluminum and the problem it caused back on the power board. Enter the mighty multi meter to find absent voltages on one of the outputs. At 1st i couldn't locate the problem, But a magnifying glass (ya I'm getting old) turned up the culprit. Enter one fried SMT Ferrite bead. In English-i had killed a filter choke that was about 1/2 the size of a grain of rice. I located the circuit diagram and parts manifest PDF on line, luckily.
So it's 10 O'clock PM. Where the heck am i going to find one these this time of night. :smack:
Into the cash of dead circuit boards for parts i go.
Guess what i found on the back of dead PS3. :biglaugh:So a long story short. Now my Peavey is a little bit Playstation. :werd:
So the moral of this is, do as i say and not as i do. If you find the need to augment your solid state amp cooling. Completely remove your heat sink before any drilling and tapping.
Cheers
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