Posted by
Elecraft mailing list on
Jun 10, 2019; 5:50am
URL: http://elecraft.85.s1.nabble.com/Silent-power-supply-for-a-K3s-tp7652889p7652916.html
Somewhere around 1980 I was talked into buying a power supply at a hamfest by my good friend who was a great technician. He told me it was a terrific deal. He was right. I don't remember what I paid for it but I know it was lessthan $100. It was a 56 amp rack mounted Llamda metered supply. The model is an LM G12-M. I believe it weighs about 75 pounds. I used to have it in a relay rack at my old QTH shack. In my present shack I have it sitting on a furnituredolly which makes it easy to roll around on the floor. It sits under my desk. It developed an audible arc when turned on so I leave it on 24 - 7. I'm sure the new cost of it would be pretty high but I'm so glad I followed my friend's advice tobuy it. No RFI and no fans.
BillK3WJV
On Sunday, June 9, 2019, 4:30:07 PM EDT, Ken Winterling <
[hidden email]> wrote:
I use an IOTA DLS-55 SMPS power supply (
https://www.iotaengineering.com/dls55.htm). It provides 55 amps, doesn’t produce RFI, is audibly quiet,
and rugged. Mine is mounted under the radio table and is on 24/7/365.. I
never hear it. Iota also makes them in other output currents and voltages.
Ken
WA2LBI
On Sun, Jun 9, 2019 at 3:27 PM Bob McGraw K4TAX <
[hidden email]> wrote:
> I find Mark's point very important. Obtain and use a supply which is
> more than adequate for the service or load. Thus a 25 amp supply
> feeding a radio drawing 20+ amps will need lots of cooling. This is
> not the way to do it. Get a 50 amp supply for a radio drawing 20+ amps
> and the fan(s) will likely never come on. Go the cheap way and get
> the cheap results. Do it right and be happy. Don't be a cheap ham
> and then complain about the product you purchased.
>
> There is more to choosing a power supply than volts and amps. How about
> duty cycle? And CCS rated supplies vs. ICAS rated supplies. Humm.......
>
> 73
>
> Bob, K4TAX
>
>
> On 6/9/2019 2:12 PM, Mark Murray via Elecraft wrote:
> > Peter,
> >
> > Check out the high amperage 13,8 volt power supplies offered by Samlex
> > America at the following link, and in particular their 100-amp -plus
> > (continuous) supplies where the fans do not activate for low draws. You
> had
> > mentioned something about price not being so important. These ain't
> cheap.
> > 73 de Mark .w2or.
> >
>
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