Author Topic: Hissing LA502

December 01, 2022, 04:30:02 PM
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igor.moreno

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Hi !
I've got LA502 I built years ago that I don't often use because of it's hiss, which can be too much depending on the sources.
Is there any way to atenuate the hiss ?

Thanks !

Igor


December 02, 2022, 03:52:10 PM
Reply #1

JPK

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What is your PCB revision number?
JPK

December 02, 2022, 06:44:50 PM
Reply #2

igor.moreno

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It's a REV 1.2.

December 05, 2022, 09:23:46 AM
Reply #3

JPK

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Do you know this modification?
JPK

December 05, 2022, 12:25:05 PM
Reply #4

igor.moreno

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No, I did not know this modification.
I'll try it as soon as I have time.

Thanks !

Igor

December 16, 2022, 01:51:44 PM
Reply #5

igor.moreno

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Hi,

One of the knobs screw broke, making the disassembly of the unit impossible...
Do you have any tip to remove the broken screw on the knob without making too much damage ?

Thanks,

Igor

December 16, 2022, 04:54:48 PM
Reply #6

JPK

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A 2.5mm drill into the hole. If the thread is damaged, it does not matter because there is another screw on these knobs.
JPK

December 17, 2022, 05:37:10 PM
Reply #7

igor.moreno

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OK, thanks, i'll try that !