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"WHAMMY" Pass DIY headphone amp guide
"WHAMMY" Pass DIY headphone amp guide
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Old 21st September 2018, 03:49 PM   #571
jwjarch is offline jwjarch  United States
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Quote:
Originally Posted by 6L6 View Post
0.3v difference is fine.

Don't worry about the LEDs extinguishing. Many circuits have different current draws on the rails. Plus, if you are looking at this under no load, it's essentially meaningless.

Carry on.

To the LEDboyz. Mine do that as well. I thought it was strange at first too. But, they were discussed a few pages back. Nothing to worry about apparently.
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Old 21st September 2018, 08:06 PM   #572
mod_sonic is offline mod_sonic  United Kingdom
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Default LED Extinguishing Time

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Originally Posted by jwjarch View Post
To the LEDboyz. Mine do that as well. I thought it was strange at first too. But, they were discussed a few pages back. Nothing to worry about apparently.
I have seen the posts telling me it's not a problem, but I haven't seen an explanation why one side of the Whammy will draw a significantly larger current than the other, when both sides have essentially the same capacitor and resistor values (ignoring tolerances) arranged in an identical way :-)

When you pull the power plug the energy stored in the capacitors dissipates through the LEDs. The stored energy is a function of the voltage applied. As both sides get the same voltage, and both sides have the same capacitance and resistance, then both sides should have the same amount of stored energy, so surely the length of time the LEDs take to extinguish should be approximately the same ?

What am I missing please ?
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Old 21st September 2018, 10:06 PM   #573
6L6 is offline 6L6  United States
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"WHAMMY" Pass DIY headphone amp guide
That the draw on the rails is not symmetrical.
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Old Yesterday, 10:42 PM   #574
batty is offline batty  Australia
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Have finished mine now, initially it was very quiet and hugely distorted, checked everything for dry joints and polarity, all good. Swapped the IC and everything is sweet.
1 DOA 833, swapped it for an OPA2134 I had.

I have added a pair of RCSa on the back panel and will hook them up to the output at some stage as Pre amp outs.
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Old Today, 04:27 AM   #575
batty is offline batty  Australia
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RCAs
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