[access-uk] Re: Mains supplies/chargers?
- From: David W Wood <g3yxx@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>
- To: access-uk@xxxxxxxxxxxxx
- Date: Tue, 22 Mar 2005 19:07:38 +0000
Andy
a charger may have some extra circuitry in it to detect the charge state
of whichever kind of rechargeable battery is being used.
As far as your current situation is concerned, I don't think that the
nature of the power unit will have any relevance unless, as Tris has
said, the wave form is an issue.
David
In message <003b01c52eda$497611f0$198ee550@box1>, Andy Collins
<Andy@xxxxxxxxxxxxxxxxxxx> writes
>Thanks David, I will do this later when seeing a friend. The charger doesn't
>have the facility to change the voltage, I think it originally came with a
>personal CD player, or an Answer machine! It might just be a power supply
>and not a charger, I don't know, will that make a difference?, and if it is
>a charger and I've got ordinary AA batteries in the radio could that cause a
>problem when connected to the mains?
>
>Andy
>----- Original Message -----
>From: "David W Wood" <g3yxx@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>
>To: <access-uk@xxxxxxxxxxxxx>
>Sent: Monday, March 21, 2005 9:08 PM
>Subject: [access-uk] Re: Mains supplies/chargers?
>
>
>> Andy
>>
>> your radio may be getting hot because the voltage of the charger is too
>> high.
>>
>> Check the running voltage of the radio
>>
>> also check the voltage to which the charger is set.
>>
>> David
>>
>>
>> In message <082e01c52e25$0a84a520$198ee550@box1>, Andy Collins
>> <Andy@xxxxxxxxxxxxxxxxxxx> writes
>>>Tristram - So far, I have only used the radio powered this way for about
>>>3-4
>>>hours, and nothing has happened! I have noticed however, that the radio
>>>does
>>>get quite warm, could that be something to be worried about?
>>>
>>>Andy
>>>----- Original Message -----
>>>From: "Tristram Llewellyn" <tris-l@xxxxxxxxxx>
>>>To: <access-uk@xxxxxxxxxxxxx>
>>>Sent: Monday, March 21, 2005 1:56 PM
>>>Subject: [access-uk] Re: Mains supplies/chargers?
>>>
>>>
>>>> Andy asked
>>>>
>>>> "In other words, are all these power supplies standard,
>>>> whether they double as chargers or not?"
>>>>
>>>> Firstly you must hever hook a CD power adaptor (most are) to something
>>>> expecting an AC input you'll blow it up. There are some occasions,
>>>> mostly
>>>> cheap DJ mixers that actually use a AC power adaptor with what looks
>>>> like
>>>> a
>>>> DC power jack, be careful.
>>>>
>>>> Assumkng you've determined AC/DC generally you have to watch for the
>>>> power
>>>> supply voltage, too little and you may not get your unit started, too
>>>> much
>>>> and you may cause damage. Also pin polarity at the connector may be an
>>>> issue potentially though I haven't knowingly seen much variation here.
>>>>
>>>> Assuming you may have all these right and the connector fits you may
>>>> still
>>>> not get an operating unit, current draw may exceed what the power supply
>>>> is
>>>> able to deliver. You must make sure the current capacity specified
>>>> often
>>>> as
>>>> Milli-amps (mA) is equal to or exceeds that of the unit you are trying
>>>> to
>>>> power, too little and the lights might not comon as it were.
>>>>
>>>> Sounds like you have something suitable already but check the voltage on
>>>> the
>>>> power supply you are using. It doesn't matter what the adaptor was
>>>> supplying power too in it's past be it charger or some other gizmo it's
>>>> all
>>>> power, but it might matter in the voltage is too hot.
>>>>
>>>> Regards.
>>>>
>>>> Tristram Llewellyn
>>>> Sight and Sound Technology
>>>> Technical Support
>>>> www.sightandsound.co.uk
>>>>
>>>> ----- Original Message -----
>>>> From: "Andy Collins" <Andy@xxxxxxxxxxxxxxxxxxx>
>>>> To: <access-uk@xxxxxxxxxxxxx>
>>>> Sent: Monday, March 21, 2005 12:42 PM
>>>> Subject: [access-uk] Mains supplies/chargers?
>>>>
>>>>
>>>> Hi all -
>>>>
>>>> I'm using the Ministry Of Sound personal dab radio which seems to eat
>>>> it's
>>>> way through batteries every 4-5 hours! To save on this, I have hooked it
>>>> up
>>>> to my surround sound system, using a mains power adapter/charger. The
>>>> one
>>>> I'm using didn't come with the radio, but I have lots of these
>>>> powerpacks
>>>> from all kinds of different appliances I have bought through the years,
>>>> and
>>>> I'm wondering if because the radio is working using one of them, if it's
>>>> actually safe? In other words, are all these power supplies standard,
>>>> whether they double as chargers or not? Am I safe doing what I'm doing?
>>>> Could doing this damage the radio? I'm guessing that it's safe, but
>>>> needed
>>>> to check for peace of mind.
>>>>
>>>> Thanks
>>>>
>>>> Andy
>>>>
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>>
>> --
>> David W Wood
>>
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David W Wood
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