[Elecraft] K3/100 power supply

[Pete Smith]

There is an excellent review of the Samplex SEC 1235M by AD5X at 
<http://www.ad5x.com/images/Presentations/SEC1235M%20Review.pdf>.  He is 
right on target with everything including the need for a simple mod to 
quiet the on-demand internal fan.  These cost US$140 at US retail, or 
about US$120 without the meters.  Mine has been FB for a year, and I 
would not hesitate to buy another.

It delivers 13.8 volts (not 13) with 30 amps continuous and 35 amps peak 
at out line voltage - 115-120VAC - I have never seen the voltage meter 
so much as flicker at full K3 power.

73, Pete N4ZR

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On 4/12/2011 8:14 AM, VK5ABQ wrote:
> Dear Group,
>
> I am considering a suitable power supply for the K3/100.
>
> One manufacturer whose supplies are readily available on our Australian
> market and well documented is XP Power. These supplies are manufactured in
> China but judging by their datasheets, they seem much better quality than
> those from our retail stores. Only other alternatives such as Powerbox are
> twice the price or I could import an Astron switcher (their linear supplies
> are 110VAC only).
>
> An XP Power model I’m considering is the LCL300PS12, from their LCL series;
> datasheet is shown at http://www.xppower.com/pdfs/LF_LCL.pdf . They sell for
> about $180 ea.
>
> I have some questions for readers and Elecraft please -
>
> 1. The LCL300PS12 can provide 25A and has an adjustable output range of 11.0
> to 13.0V. Is this suitable for the K3/100? XP Power’s 12.5 to 14.5V model
> isn’t available here.
>
> 2. Pages 8 onwards of the data sheet show spectrum plots of the supply’s
> conducted emissions. I don’t have a feel for dBuV, so are the levels shown a
> concern? I can’t see any plots for radiated emissions.
>
> 3. Has anyone used these supplies and been happy with their emissions and
> level of audiable noise?
>
> 4. Should I consider something else? Found this which looks expensive:
> http://www.barrettcommunications.com.au/2022.html Also have noticed a lack
> of mention in Elecraft’s forum of TenTec’s model 941.
>
> Thanks,
> Shane
> VK5ABQ
>
> -----
> Shane
> K3/10: S/N 2127, KBPF3, KFL3B-FM, KFL3A-6K, KFL3A-2.8K, KFL3A-400, KTCXO3-1&  KXV3.
> --
> View this message in context: http://elecraft.365791.n2.nabble.com/K3-100-power-supply-tp6264879p6264879.html
> Sent from the Elecraft mailing list archive at Nabble.com.
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