[time-nuts] Power Supplies

Steve - Home steve-krull at cox.net
Sun May 3 14:26:07 UTC 2020


Hi Bob,

Main reason was I already have a few 15V ones and would like to reuse them. I have a gut feeling there’s not a major difference between the 12V and 15V models. I may get one of the 12V ones and open it up and do a comparison. I thought maybe someone had been down that path before. 

Steve
WB0DBS



> On May 3, 2020, at 9:15 AM, Bob kb8tq <kb8tq at n1k.org> wrote:
> 
> Hi
> 
> If you want to do it and get full output, the change probably involves nasty things
> like swapping out inductors …. Likely cheaper to just spend the $16 and buy
> a brand new one at the right voltage. 
> 
> https://www.trcelectronics.com/View/Mean-Well/LRS-100-12.shtml <https://www.trcelectronics.com/View/Mean-Well/LRS-100-12.shtml>
> 
> Given the risks of getting a mod “almost right”, it’s probably worth the piece of mind
> with a new one as well. 
> 
> Bob
> 
>> On May 3, 2020, at 9:53 AM, Steve - Home <steve-krull at cox.net> wrote:
>> 
>> Has anyone found schematics for the Mean Well supplies? I have a couple of 15V 7A ones that will adjust down to 14.1 and I’d like to get them down to the 12-13.8 range. 
>> 
>> Steve
>> WB0DBS
>> 
>> 
>> 
>>>> On May 3, 2020, at 8:43 AM, Bob kb8tq <kb8tq at n1k.org> wrote:
>>> 
>>> Hi
>>> 
>>> 
>>>> On May 2, 2020, at 8:10 PM, Perry Sandeen via time-nuts <time-nuts at lists.febo.com> wrote:
>>>> 
>>>> Learned Gentlemen,
>>>> I personally dislike equipment that uses *wall warts* due to quality concerns
>>>> One inexpensive way I've powered my Lucent equipment is using used laptop power supplies. They're easily found at HamFests or on ebay.  On Ebay prices very wildly.  If you buy 3 or 4 they can be $5 each shipped.
>>>> Another source to consider are the Mean Well SRPS at Jameco. 
>>> 
>>> If you are shopping for Mean Well supplies, TRC
>>> 
>>> https://www.trcelectronics.com/mean-well <https://www.trcelectronics.com/mean-well>
>>> 
>>> is a good place to shop. They are a (if not the) factory direct US distributor for the
>>> brand. That should eliminate the risk of getting one labeled Meen Well or Men Well or ….
>>> That sort of thing is pretty common on eBay.
>>> 
>>> At least on the stuff I’ve shopped for, their prices are pretty good. They deliver next 
>>> day on the cheap. Of course that’s probably because they are about 2 hours down the
>>> road from here :) 
>>> 
>>> Bob
>>> 
>>>> They run from 55 watts on up with a wide range of voltages.  They are have spec sheets.  Some SRPS's on ebay are cheap but their quality.......
>>>> Regards,
>>>> Perrier
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>> 
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