Voltage drop.

rollo · July 07, 2010, 09:44:40 AM

Our wonderfull utility company has dropped power to 105V today. How can this voltage affect our gear ? Will running at 105V do any damage ? Concerned.

charles

Barry (NJ) · July 07, 2010, 09:56:15 AM

Pretty sure a 'low voltage' situation won't do any harm, though things may not perform as well as when they've got a full 120v to work with. Blame Evan

evan1 · July 07, 2010, 10:10:05 AM

Quote from: Barry (NJ) on July 07, 2010, 09:56:15 AM
Pretty sure a 'low voltage' situation won't do any harm, though things may not perform as well as when they've got a full 120v to work with. Blame Evan

Thanks Barry

rollo · July 07, 2010, 10:42:03 AM

Quote from: Barry (NJ) on July 07, 2010, 09:56:15 AM
Pretty sure a 'low voltage' situation won't do any harm, though things may not perform as well as when they've got a full 120v to work with. Blame Evan

Thanks Barry. BTW have you spoken to Ron Bauman at Mapleshade with reference to your gallos. They Mod them and to my ears a wondefull improvement. One of our club members has them . Very impressive to say the least.

charles

Barry (NJ) · July 07, 2010, 01:27:25 PM

No, but Anthony did build them for me at his house

rollo · July 10, 2010, 08:19:57 AM

Quote from: Barry (NJ) on July 07, 2010, 01:27:25 PM
No, but Anthony did build them for me at his house

Cool. Ask anthony about the mods I believe he is familiar with them. Any way see ya the 24th.

charles

Barry (NJ) · July 10, 2010, 08:33:52 AM

I'll ask him about it, but I don't think Pierre has started modding the 3.5 yet.

Re: the 24th, that date is difficult for me, as I've got some prior family commitments, but we'll see.

tmazz · July 13, 2010, 04:45:00 AM

Quote from: rollo on July 07, 2010, 09:44:40 AM
Our wonderfull utility company has dropped power to 105V today. How can this voltage affect our gear ? Will running at 105V do any damage ? Concerned.

charles

Any high quality power supply should have good enough regulation to maintain its rail voltages in the face of a 10-16% input voltage drop. So there should be no risk to the operating section of the component itself. However; in order to provide the normal power to the component (in terms of rail voltages and current) the power supply would have to pull more current from the wall to make up for the lower input voltage. While may not pose much of a problem for a power supply that is running at the lower end of its capacity it could cause damage in a power supply that is approaching it's maximum output in the first place. For example a 200 WPC power amp that is only putting out about 20 watts would have plenty of "headroom" to pull the extra current without causing any damage. However if you are running an 8watt set amp at 7 1/2 watts there might not be enough spare capacity in the power supply and running it at a lower voltage/higher current could possibly end up damaging something in the power supply itself (and I say maybe because I have not way of knowing how much the power supply in any given component has been overbuilt.

How about hearing from some of our EEs and PEs. Does this sound reasonable to you guys or am I way off base? (and while any of this may or may not be true in theory, in practice does any of it really matter or are all power supplies purposely overbuilt to handle this exact situation.) The summer is far from over and I am sure we will have to contend with voltage reductions several more times before the Fall.

evan1 · July 13, 2010, 04:39:58 PM

Heat wave is approaching

richidoo · July 13, 2010, 04:50:34 PM

I hope you're well rested from the last one, Evan!

Nice cool wet spell in NC now, but it won't last...

evan1 · July 13, 2010, 04:52:40 PM

Quote from: richidoo on July 13, 2010, 04:50:34 PM
I hope you're well rested from the last one, Evan!

Nice cool wet spell in NC now, but it won't last...

Last Friday was a 16 hr day . Started on Thursday at 7pm and finished at Fri at 11 am

Come on guys conserve a little

Nah , WE WANT OT

rollo · July 14, 2010, 08:25:55 AM

Quote from: evan1 on July 13, 2010, 04:52:40 PM
Quote from: richidoo on July 13, 2010, 04:50:34 PM
I hope you're well rested from the last one, Evan!

Nice cool wet spell in NC now, but it won't last...
Last Friday was a 16 hr day . Started on Thursday at 7pm and finished at Fri at 11 am

Come on guys conserve a little

Nah , WE WANT OT

Ah Ha so its all your fault.

Power to the people.

charles

Barry (NJ) · July 14, 2010, 09:59:58 AM

Quote from: rollo on July 14, 2010, 08:25:55 AM
Quote from: evan1 on July 13, 2010, 04:52:40 PM
Last Friday was a 16 hr day . Started on Thursday at 7pm and finished at Fri at 11 am

Come on guys conserve a little

Nah , WE WANT OT

Ah Ha so its all your fault. Power to the people.

charles

That's what I said in my initial reply to this thread...
What, you didn't believe me(?)

evan1 · July 14, 2010, 12:15:50 PM

Quote from: rollo on July 14, 2010, 08:25:55 AM
Quote from: evan1 on July 13, 2010, 04:52:40 PM
Quote from: richidoo on July 13, 2010, 04:50:34 PM
I hope you're well rested from the last one, Evan!

Nice cool wet spell in NC now, but it won't last...
Last Friday was a 16 hr day . Started on Thursday at 7pm and finished at Fri at 11 am

Come on guys conserve a little

Nah , WE WANT OT

Ah Ha so its all your fault. Power to the people.

charles

And you still have power ?