Author Topic: C5 or not c5

January 30, 2022, 11:48:40 AM
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Pierre

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I just quite finish my 502
Everything 's ok

But, i'm not sure i have to solder c5.
In the document "parts list" come in the box with my 502, on the lune c5 , it's writed "not connected"
But on the picture on the guide, the c5 is soldered
It's renovation 23

Should i solder it or not ?

Thanks

January 31, 2022, 07:57:21 AM
Reply #1

JPK

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Yes solder C5.
It is an error in parts list.
JPK

January 31, 2022, 09:13:55 PM
Reply #2

Pierre

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Ok! Thanks

July 05, 2025, 01:25:42 PM
Reply #3

UrbanOsterman

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Hello
When I insert my LA502 into my Microphone-preamp-chain, I loose a bit of Bottom from my Sound.
Is there a way not to loose the lower frequency in the LA502? or is it part of the design?
Is this normal or did I make some error in my soldering?

Regards
Urban Osterman

July 07, 2025, 09:09:26 AM
Reply #4

JPK

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This is not normal.
Are you driving it from a low impedance?
The attenuation at 20Hz should not be more than 0.3 dB.
Check the value of C1, C2, C3, C4.
JPK

 

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