[TheList] [NZART-Members] Wouxun cheap transceivers chargers.

Sun Jul 15 15:43:19 AEST 2012

Thanks David,

So it is a common problem yet the battery melting isn't.

Good to know there is no problem with them literally turning into little 
Lucifer's.

Sounds like the owners would be well advised to fit heatsinks all the 
same though.

Regards,

Neill.

On 15/07/2012 5:27 p.m., David G King wrote:
> It seems that having that transistor fail is a common problem, although not with the same
> heat problems.
>
> See  http://groups.yahoo.com/group/Wouxun_KG-UVD1/message/9023
> for a summary of the problem.
>
>
> -ZL1DGK
>
> On 15 Jul 2012 at 16:44, Neill Ellis wrote:
>
>> Hi John,
>>
>> It isn't that far down the road yet...
>>
>> I have no way of knowing if someone had previously altered this charger
>> to put a lower power transistor in back to front to get it going. The
>> bulk of them may have the correct transistor fitted with a heatsink.
>>
>> Hence my request for feedback.
>>
>> Regards,
>>
>> Neill ZL1TAJ.
>>
>>
>> On 15/07/2012 4:25 p.m., John Martin wrote:
>>> Hi Neil
>>>
>>> Given that these are actively promoted within RSGB Bulletins.   I
>>> suggest a widespread information campaign be established as well.
>>>
>>> Within latest RSGB, Bulletin, companies such as www.moonraker.euare
>>> selling them.
>>>
>>> Including Martin Lynch & Sons: ML&S www.hamradio.co.uk.
>>>
>>> Infoline might also be a good place to place warnings as well or NZART
>>> web site.
>>>
>>> 73
>>>
>>> de ZL1GWE
>>>
>>> John
>>>
>>>
>>>
>>>
>>> From: Neill Ellis <tgsnoopy at gmail.com>
>>> To: NZART Members Reflector <nzart-members at lists.nzart.org.nz>
>>> Date: 15/07/2012 04:15 p.m.
>>> Subject: [NZART-Members] Wouxun cheap transceivers chargers.
>>> Sent by: nzart-members-bounces+john.martin=nz1.ibm.com at lists.nzart.org.nz
>>> ------------------------------------------------------------------------
>>>
>>>
>>>
>>> Hi Guys,
>>>
>>> I've just had a friend who had imported a cheap Wouxun transceiver bring
>>> to me what's left of the radio/charger. It kind of turned little Lucifer
>>> on him.
>>>
>>> The charger itself has a shorted pass transistor and it seems the
>>> increased voltage and subsequently the current has caused the lithium
>>> based transceivers battery to potentially almost catch fire (It got hot
>>> enough to seriously distort the plastic etc). In this case it's owner
>>> smelt it and shut of the power, relocating it outside. Potentially a
>>> lucky escape.
>>>
>>> Of concern the PCB of the charger indicates the fitted device should be
>>> a 2SB546 and should be fitted with a heatsink. What's fitted is a 2SB772
>>> (reversed) without a heatsink.
>>>
>>> If anyone else has one of these Wouxun (1A31KG-2 or KG-HN-2?) Li-Ion
>>> chargers that take 12V in and charge at 8.4V 400mA, please check it! I'd
>>> suggest at very least you fit a heatsink to the pass transistor if one
>>> isn't already fitted to it.
>>>
>>> I'd appreciate anyone who has one passing feedback to me, as I in all
>>> honesty do not know if this is an isolated case or common problem. If
>>> it's likely to happen again we need to warn people.
>>>
>>> Thanks,
>>>
>>> Neill ZL1TAJ.
>>> _______________________________________________
>>> NZART-Members mailing list
>>> NZART-Members at lists.nzart.org.nz
>>> http://lists.nzart.org.nz/mailman/listinfo/nzart-members
>>>
>>>
>>>
>>>
>>> _______________________________________________
>>> NZART-Members mailing list
>>> NZART-Members at lists.nzart.org.nz
>>> http://lists.nzart.org.nz/mailman/listinfo/nzart-members
>>
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>
>
> ---
> d_king at xtra.co.nz
>
>
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