I've been in electronics for 30+years.
Trust me, there always small variations in voltage on long cable
runs, even under no load.
--
On 10/18/2012 10:24 PM, Greg Ihnen
wrote:
That's what I thought... but... he said: "We
see 27.3 volts at the battery. And 27.1 volts at the top with no
load"
On Thu, Oct 18, 2012 at 3:57 PM, Chris
Fabien <[email protected]>
wrote:
No current = no voltage drop. Ohms Law.
On Thu, Oct 18, 2012 at 3:38 PM, Jeromie Reeves <[email protected]>
wrote:
> The resistance of the length of wire.
>
> On Thu, Oct 18, 2012 at 11:03 AM, Greg Ihnen <[email protected]>
wrote:
>> A voltage difference with no load? What's causing
the drop?
>>
>>
>> On Thu, Oct 18, 2012 at 10:06 AM, Justin Wilson
<[email protected]>
wrote:
>>>
>>> We see 27.3 volts at the battery. And
27.1 volts at the top with
>>> no load.
>>> Obviously load will have an impact on this.
>>>
>>> Justin
>>>
>>> -----Original Message-----
>>> From: Jeromie Reeves <[email protected]>
>>> Reply-To: WISPA General List <[email protected]>
>>> Date: Thursday, October 18, 2012 9:15 AM
>>> To: WISPA General List <[email protected]>
>>> Subject: Re: [WISPA] Another Ubiquity question
>>>
>>> >That depends on wire size. That distance is
not going to be ethernet
>>> >so I will assume #12 AWG, 400ft, copper
wire, etc. You should be
>>> >seeing a 5.6% drop under a 1amp load or
about 25v under load.
>>> >
>>> >
>>> >On Thu, Oct 18, 2012 at 6:02 AM, Justin
Wilson <[email protected]> wrote:
>>> >> 27 volts at the base. DC has
very little loss over 400-500
>>> >> foot
>>> >> distances. We are seeing about .1
volt loss on a 400 foot run.
>>> >>
>>> >> -----Original Message-----
>>> >> From: Scott Lambert <[email protected]>
>>> >> Reply-To: WISPA General List <[email protected]>
>>> >> Date: Thursday, October 18, 2012 12:16
AM
>>> >> To: <[email protected]>
>>> >> Subject: Re: [WISPA] Another Ubiquity
question
>>> >>
>>> >>>On Wed, Oct 17, 2012 at 10:14:03PM
-0400, Justin Wilson wrote:
>>> >>>> Many UBNT deployments running
at 27volts of clean DC power. Not
>>> >>>> saying it's ideal but it
works.
>>> >>>
>>> >>>27v at the ethernet port or 27v at
the base of the tower?
>>> >>>
>>> >>>--
>>> >>>Scott Lambert
KC5MLE Unix
>>> >>>SysAdmin
>>> >>>[email protected]
>>>
>>>_______________________________________________
>>> >>>Wireless mailing list
>>> >>>[email protected]
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>>> >>>
>>> >>
>>> >>
>>> >>
_______________________________________________
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>>>
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>>
>>
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