shunt regulator slow start

Jeroen · 1287

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Offline Jeroen

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on: June 08, 2015, 10:45:19 AM
When testing the voltage on D1  I put the power on and after a couple of seconds all 4 LED's on the shunt regulator lit up. Then I put the power off. When putting the power on again for measuring the voltage on D6 it took 5 minutes before all 4 LED's lit up.  I did a couple of more tests and every time it took 5 minutes before the LED's starting to lit up (and the voltage on D1 and 6 drops).

Is this something I have to worry about?

Voltages on D1 and D6 are both 222 volts and hardly fluctuate.

Best Regards,

Jeroen


Offline Paul Birkeland

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Reply #1 on: June 08, 2015, 11:04:35 AM
Quote from: Jeroen on June 08, 2015, 10:45:19 AM

Voltages on D1 and D6 are both 222 volts and hardly fluctuate.
This is the important part.  The other timing issues are the 12BH7 warming up.

-PB

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline Paul Joppa

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Reply #2 on: June 08, 2015, 11:35:33 AM
Five minutes is very slow, though. What is your power line (mains) voltage?

Paul Joppa

Offline Jeroen

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Reply #3 on: June 08, 2015, 06:30:44 PM
Line voltage is about 227 volt at the moment. 

While typing this post I powered the amp on and within 40 sec. all 4 Led's light up.

I think the line voltage was lower the moment I did the first measurements..


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