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Down sides to parallel wire runs in PSU?
Down sides to parallel wire runs in PSU?
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Old 26th March 2018, 09:18 PM   #1
brucew268 is offline brucew268  United Kingdom
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Default Down sides to parallel wire runs in PSU?

Given that the trace in my Veroboard is not especially wide, I thought that for the main pos & neg trace I might parallel the longer bits (2") with some 20AWG insulated wire, just soldered through the holes between components.

Is there any tradeoff to this? I know it beefs up the amount of copper carrying the signal, but due to the bends, the 20AWG wire being a bit larger than the trace, etc., could there be any performance downside?
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Old 26th March 2018, 09:20 PM   #2
DF96 is offline DF96  England
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Sounds OK to me.

The nice thing about Veroboard is that you are more or less forced to use a bus ground and think about the order in which you connect things to it - better than using a 'star' and not thinking.
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Old 26th March 2018, 09:49 PM   #3
brucew268 is offline brucew268  United Kingdom
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When I first pulled the PSU and added the parallel wire runs, the bass and lower mids were emphasized a bit more and the HF sounded less precise. I was trying to decide if I could have introduced some time smearing in some way or if it was just a psycho-acoustic effect of the change in frequency emphasis. I ran it in for a couple days and listened again. Now the HF seems to have settled back a bit. Maybe the new solder joints needed a little juice for a couple days?
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Old 26th March 2018, 09:54 PM   #4
scottjoplin is offline scottjoplin  Wales
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Old 26th March 2018, 09:56 PM   #5
DF96 is offline DF96  England
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No. Solder does not need 'burn-in'. 'Time smearing' is a myth, except in loudspeakers.

You may have slightly changed hum levels, interchannel crosstalk etc. Unlikely to have changed the frequency response, unless the amp is poorly designed.
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Old 26th March 2018, 10:06 PM   #6
brucew268 is offline brucew268  United Kingdom
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I thought that would stir the pot. Thx for the clarification DF96.
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