[TrunkCom] 250 heat issue

Fri, 10 Jan 2003 23:50:51 -0500

The Pro Power 3 uses a timer circuit to prevent over charging. After charging for a 
set amount of time, it switches to trickle charge.

Dave

[email protected] wrote:
> In a message dated 1/8/03 11:05:37 PM Central Standard Time, 
> [email protected] writes:
> 
> 
> 
>>[email protected] wrote:
>>
>>>If any of you are having trouble with your 250s heating up, I would 
>>
>>suggest 
>>
>>>calling Uniden.  They shouldn't do that.  Uniden might have gotten wrong 
>>>chargers.  500mah instead of 200/300mah.  Unless 500mah is needed for 
>>
>>power 
>>
>>>only with the digital card installed.
>>
>>The pre-production model I did an early review on for National 
>>Communications also came with the 500ma wall wart.
>>
>>The included pack is a NiMh pack, and 500ma would be charging at the C/3 
>>rate. I don't recall the exact specs for NiMh batteries, but getting 
>>this warm is not a good thing.
>>
> 
> 
> Tom and the group, I remember reading somewhere that the current limiter 
> inside the scanner (there should be one) cuts down the current going to the 
> battery pack to 200ma. I believe Uniden used a 500ma wal-wart to supply 
> enough current to charge the battery WHILE USING the scanner. I'm not sure 
> what the current draw is but I'm sure it's more than the BC-245 especially 
> with the BCi25D card installed.
> 
> I also have the Metrowest Pro-power 3 charger/scanner stand that I used for 
> my BC-235/245/3000 but it only puts out 130ma so I don't know it it will 
> actually charge the battery if I have the scanner on while charging. Even if 
> the scanner is off I wonder if 130ma is enough to get through the current 
> limiter and charge the battery? Any electonics gurus have an idea?
> 
> I might try to modify the charger to put out 200ma.
> 
> I just got my BC-250D and BCi25D on Wed and haven't had much time to play but 
> it seems to work great on Moto Type II conventional and Astro Digital TRS's 
> It sounds just like my Astro Saber on the digital TRS.
> 
> Dave                        Chicago Area Radio Monitoring Association
> N9DAV                      Chicago FireNet / Incident Page Network
> [email protected]                SARC / WAFAR / FISHFAR
> [email protected]            145.230   443.600    442.900
> 
> 

-- 
Dave Marshall N8OAY
[email protected]

All Ohio Scanner Club
http://www.aosc.org/

TrunkCom Administrator
http://mailman.qth.net/