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alba 662 record player
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Old 2nd January 2019, 09:30 PM   #1
pointy is offline pointy  United Kingdom
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Default alba 662 record player

I found an old alba 662 record player and was digging around inside it and discovered a melted component. It was light blue about 30mm H x 15mm w x 5mm it looks to be part of the PSU and has "WK129 PM01" written on it (some of it was too melted to read). can anyone help me identify what this would have been.
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Old 2nd January 2019, 10:31 PM   #2
MAAC0 is offline MAAC0  Portugal
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I would say it's a capacitor. How about a picture of the component or PSU ?
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Old 2nd January 2019, 10:32 PM   #3
Galu is offline Galu  Scotland
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Hi Pointy!

If it looks strange to you, it could be an old selenium rectifier.

Need more description - a photo perhaps?
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Old 3rd January 2019, 03:31 AM   #4
Ian Finch is offline Ian Finch  Australia
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Most selenium rectifiers of more than a few watts rating were open framed. i.e. they looked like a stack of metal plates, square or round, spaced a few mm apart for air cooling. Thankfully, most had disappeared from consumer products, before the 1970s. Selenium Rectifiers

If the component has partly melted, it's obviously covered in a thermoplastic material which would be unwise on any type of rectifier. The description may fit a simple safety device protecting the motor or amplifier, though. Perhaps a small, auto-resetting thermal relay? At least you could check around the power supply for other signs of silicon or even germanium type diodes or bridges from the era.
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Old 3rd January 2019, 06:03 PM   #5
pointy is offline pointy  United Kingdom
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it looks like this.? "I hope you can see the picture"
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File Type: jpg S3020011.JPG (470.1 KB, 35 views)
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Old 3rd January 2019, 10:34 PM   #6
Galu is offline Galu  Scotland
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Need to see where this component is located in the circuit. Could you photograph the whole amplifier/power supply section for us?

Agree with Ian that it may be a thermal fuse.

Last edited by Galu; 3rd January 2019 at 10:44 PM.
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Old 7th January 2019, 10:47 PM   #7
pointy is offline pointy  United Kingdom
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its where the bridge rectifier should be ........so thats what it will be ( selenium rectifier )

i will replace it with a new one ....... the unit uses AD161 and AD162s and claims to have an out-put of 25watt (stereo)

thats about 2 amps so a replacement rated at 8 amps and 1000 volts should stay cool.

i hope i've got that right ........ and many thanks
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