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December 05, 2019, 04:52:47 AM

Author Topic: Shunt Regulator wiring: ok to use heavier gauge?  (Read 276 times)

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Offline Deke609

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Shunt Regulator wiring: ok to use heavier gauge?
« on: September 22, 2018, 07:58:36 PM »
Last night's install of the Shunt Regulator upgrade was plagued by a comedy of errors ... all ultimately traceable to me having mixed up B-reg with A-reg, an error I missed twice when rechecking every step in the manual!  I caught it the third time.

I fixed the mix up, but in the process of error-checking I snapped the thin gauge hook-up wire in a number of spots - sometimes repeatedly: i.e., I'd snap the wire, de-solder and replace it with a new piece, only to snap it again.  To the point where I ran out of the supplied hook-up wire and used remnants of the heavier gauge wire supplied with the SR main kit in 2 or 3 spots.  Is that problem? Voltage checks were bang on and where called for in the manual I got the same voltage readings on both A and B sides with no more than 1 volt difference.  And it sounds amazing.  The heavier gauge wire was only used to connect the Shunt board to the main panel/board, not to connect between different points on the Shunt board.

But if it is better to use the thinner gauge, I will order some teflon wire (28ga? 30ga?) and rewire the entire install (b/c I'm not entirely confident that the other thin wires aren't on the verge of breaking if poked and prodded while replacing the heavier gauge substitutions).

Each of the snapped wires broke off where they met the shunt regulator board. When I examined the broken end, it looked like the wires had been overcooked - I think I over heated them. I'm guessing those thin wires and pc board points don't dissipate heat nearly as rapidly as the heavier gauge or as rapidly as the same thin gauge connected to a terminal strip (none of them snapped at a terminal connection). It's also conceivable that I nicked them when wire-stripping - but that would be surprising b/c I used a stripping groove one size up (bigger in diameter) than the wire -- and checked to see that the bare wire would make no contact with the strippers. 

Many thanks in advance,

Derek
Derek
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Roon Intel NUC ->  Yggdrasil DAC -> BeePre (w/ BeeQuiet and EML 300B)  -> Kaiju (w/ DCFil and EML 300B) or Stereomour II (2A3 [EML Mesh] and 45 Conversion [EML 45B])  -> Audeze LCD4

Online Paul Birkeland

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Re: Shunt Regulator wiring: ok to use heavier gauge?
« Reply #1 on: September 23, 2018, 04:43:55 AM »
The teflon coated wire provided with the upgrade is better quality wire that won't melt if you touch it with your soldering iron and is somewhat easier to work with when performing rework.  Using the PVC insulated wire that came with the kit is OK, and if it's working I wouldn't bother going back in and replacing it.

-PB
Paul "PB" Birkeland

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Offline Deke609

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Re: Shunt Regulator wiring: ok to use heavier gauge?
« Reply #2 on: September 23, 2018, 06:40:12 AM »
Many thanks again, Paul.  I will leave it be.  Once the amp is done burning in, I think I'll recheck the voltages on the Shunt Reg board to see if anything has gone out of spec - and if so, I will rewire then.

Derek
______

Roon Intel NUC ->  Yggdrasil DAC -> BeePre (w/ BeeQuiet and EML 300B)  -> Kaiju (w/ DCFil and EML 300B) or Stereomour II (2A3 [EML Mesh] and 45 Conversion [EML 45B])  -> Audeze LCD4