[Elecraft] K-Line Addition - DC Power Supply (Suggestion)

Fred Smith mfsj at mo-net.com
Wed Sep 19 05:25:36 EDT 2012 

I see no need for Elecraft to produce such a simple and mass produced
product from all over the world for prices that start at dirt cheap and go
up. It would be a very limited market for sure and hams like myself
sometimes want a better product for an application that we have. There are
power supplies available that top quality and noise free if a person wants
to purchase one. I'm one who thinks that the supplies should be out of the
way for the most part my VS supplies I do like to keep an eye on to make
sure nothing has changed.

I have owned several different supplies in the past and now have settled on
4 that I have kept 2 Samlex a 1223 and a 1235 one is a spare and one is used
on my MicroHAM devices as some need connections to a power supply other than
the one radios are connected to. The other 2 are both Astron a RS and a
VS-70-M's that supply the rest of the shack and 2 amps. With all these
supplies there are no supply noise at all the Samlex is a good supply and a
QST rated best buy. You can never go wrong with an Astron Linear Supply in
the proper size for your shack. 

If you're getting hum you need to do some checking on your install I would
think I have "NONE" with any of mine on my 2 K3's a K2, FTDX-5000MP or an
SRR-IQ for just a few.

73,
Fred/N0AZZ



-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of N4QS
Sent: Tuesday, September 18, 2012 5:33 PM
To: Joe Subich, W4TV; elecraft at mailman.qth.net
Subject: Re: [Elecraft] K-Line Addition - DC Power Supply (Suggestion)

I for one would like to see Elecraft produce a power supply optimized for
the K3 and matching Elecraft accessories.  For years I owned a Kenwood PS-50
power supply and regretted selling it a few years ago.  It was rock solid
and absolutely quite and yet matched my TS850S.  I currently own two Astron
RS-35 power supplies, but they do not have the fit and finish of the
Kenwood.  Any yes, both of mine have a small but noticeable amount of hum. 
The Kenwood PS-50 fit in an enclosure that is just slightly larger than the
P3.  I am sure that Elecraft would ensure top notch rf filtering, light
weight and with plenty of auxilliary outputs for running various Elecraft
devices including the KRC2, P3 and KAT500.

See this link:  http://www.universal-radio.com/catalog/hamps/ps50.html

Dave, N4QS

----- Original Message -----
From: "Joe Subich, W4TV" <lists at subich.com>
To: <elecraft at mailman.qth.net>
Sent: Tuesday, September 18, 2012 4:06 PM
Subject: Re: [Elecraft] K-Line Addition - DC Power Supply (Suggestion)



> I do not think it is in the best interests of Elecraft to attempt a
> power supply design given that it would require UL compliance
> certification (as well as other countries certification) which can be
> an expensive process for a power supply that would likely have a
> volume of less than 10,000 units even at product life end.

*IF* Elecraft were to produce a power supply, the most economical
solution would be to use a modular OEM switchers that already has UL,
CE, CSA, etc. certifications and wrap it in an Elecraft case with IEC
cord, additional filtering, external power switch, and maybe metering.
OEM supplies - available in many quality levels, form factors and price
points - are used by several other manufacturers as the core of their
"matching" (or internal) power supply offerings.

73,

    ... Joe, W4TV


On 9/18/2012 4:44 PM, Don Wilhelm wrote:
> In my opinion, power supplies should be relegated to something like the
> AC receptacle on the wall or the 12 volt battery under the hood of an
> automobile.  It should do its thing, but not be obvious.  IMHO the place
> for a power supply is on the floor under the operating desk (or
> workbench).  No need for meters on the supply itself, I have measurement
> stuff above the tabletop.  I use an Astron 35 linear at the operating
> position and have an Astron SS-30 switcher at the workbench (along with
> several other lower current supplies). There are no 13.8 volt power
> supplies above the desktop - If I need other voltages, yes, I do have a
> +/- 15 volt supply along with +5V on the workbench along with a variable
> voltage positive supply for special needs - but I don't think those are
> relevant for powering the K2, K3, or KX3.
>
> Bottom line, power supplies are on the floor out of the way and treated
> just as an energy source.
>
> So, my answer to your question is NO.  The RigRunner does sit on the
> desktop with fuses to match the wire sizes exiting from it.
> I do not think it is in the best interests of Elecraft to attempt a
> power supply design given that it would require UL compliance
> certification (as well as other countries certification) which can be an
> expensive process for a power supply that would likely have a volume of
> less than 10,000 units even at product life end.
>
> I would put this in the "it would be nice -- but" bucket.
>
> 73,
> Don W3FPR
>
> On 9/18/2012 10:27 AM, rich kennedy wrote:
>> How do Elecraft users feel about the possible addition of a
>> high-quality DC power supply that matches both the physical dimensions 
>> and
>> veneer of the existing K-Line?  The power
>> supply could even be sized to set above/below the new KAT500 and should, 
>> IMHO,
>> have multiple DC outlets such as PowerpolesR and screw lugs.  I'd be 
>> willing to pay a premium for a quiet DC
>> power supply with very low emission characteristics.  Thanks, 73, Rich, 
>> K3VAT
>>
>
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