[Elecraft] K3/100 power supply

[Doug Person]

Samlex are not reliable?  They are sold re-labled by Kenwood.  My two 
have been around for 2 decades, in constant use nearly every day.  They 
power everything in my shack.  If you look hard enough, you can find 
people with complaints about everything ever manufactured.  I guess if 
my Samlex failed, I would just fix it.  They aren't really that 
complicated.  The Powerex is well made, but I don't find the fan to be 
that bad.  The smaller the supply the more critical it is to cool.  The 
Powerex fan is just above the background noise.  The bottom line is that 
nothing is 100% reliable.  Even stuff installed on spacecraft.

Doug -- K0DXV

On 4/14/2011 8:40 PM, n5ge at n5ge.com wrote:
> I use two 100 amp supplies here that are made by Walt Williams W5YUO  They are
> quiet and bullet proof, but if you want one you will have to come to Texas, as
> he only sells local and only makes them on order.
>
> They are very heavy, so shipping would be a problem...
>
> Tom
> N5GE
>
> On Wed, 13 Apr 2011 16:51:03 -0700 (PDT), VK5ABQ<shanewh at gmail.com>  wrote:
>
>> Thank you for all your replies but I've found negative comments about most
>> (the power supplies that is....
>> boom boom)
>>
>> I found the following complaints/restrictions -
>> Powerwerx : noisy fan
>> Diamond 3000: poor reliability on later models
>> Astron: Linear's are only suitable for 110VAC not 240. Some complain about
>> fan noise and interference on their switchers.
>> Samlex: poor reliability
>> Barrett: $700.
>> Kenwood: generates electrical interference on 80 and 160m.
>>
>> XP Power's CCM250 (sold by Amtex,
>> http://www.amtex.com.au/power_pdf/CCM250.pdf) still looks interesting as it
>> is convection cooled, weighs 780g and is very small. The 15V model can be
>> trimmed down to 14.55V but I this may still be too high? Also only rated for
>> 16A continuous and 20A peak. Cost is $380 and lead time 7 weeks. Yes,
>> interest has diminished.
>>
>> Conclusion: I'll put off buying the K3/100 for now until I can bothered to
>> have another look for an electrically and audibly quiet 20A power supply
>> suitable for 240V.
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