Seems to me Elecraft already has a great linear DC supply: It's built into the
KPA500. Repackage it as a stand-alone, done.
73,
Mike, KW1ND
Knoxville, TN
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I must say I have a number of projects I would rather have
Elecraft engineering work on rather than built yet another power
supply. For example:
#1: Direct digital computer I/O for the K3, eliminating all the
A/D and D/A conversions now required between the DSP and the
computer.
Alan Bloom wrote:
I'm not sure what you mean about the regulator not being quiet. The LM723
is a simple linear I.C.; no switching noise and no acoustical noise.
...
It's true that the 723 is a really ancient IC - it was designed back in
the 70's I believe.
Ancient is not always bad, because
@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
I may have missed it if anyone else made this suggestion..I would like to be
able to purchase a P3-size empty case into which I could install a switching
supply board such as an Astron SS-30, with some additional filtering, in order
to
have a matching supply for my K3
Perhaps the blank
On Sep 19, 2012, at 9:09, Ian White GM3SEK gm3...@ifwtech.co.uk wrote:
The classic reference for this style of detailed, up-close circuit
design is 'The Art of Electronics' by Horowitz and Hill - one of the few
college-level engineering texts that belongs on the workbench as well.
Highly
I would not like to see Elecraft spend it's limited engineering
resources designing a power supply either. There are literally hundreds
of options available.
I like the idea of Elecraft offering K3, P3 and W2 blank cases. This
could probably be done with little or no engineering effort on
I like the idea of Elecraft offering K3, P3 and W2 blank cases.
speaker grill and ventilation slots
i would buy yes.
bill ny9h
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Help:
The New Elecraft D3 power supply.
Features:
- Software defined power supply.
- Software upgrades via the web.
- Microprocessor controlled voltage and current meters with LED bar
graph.
- RS232 connection to K3 so you can monitor you current and power draw
with your PC.
-
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
I think that is a great idea. My current power supply been around a while and
is Noisy.
73 Paul
kc2nyu
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Post:
Depending on cost, I'd bite, and it would be a nice addition to the K-line. I
have picked through several switchers, none of which were dead RF quiet. I
ended up defaulting to my Xantrex HPD 30-10 lab supply, which is a hybrid
switching front-end/linear tracking output regulator. It is dead
That seems a good idea except for two reasons:
1. It wouldn't work for me unless it could handle 100 amps. I have
2m and 70cm RF amps that require 50 or 60 amps and I have just about
finished replacing all of my 12v wall warts with a buss that runs
them with power from that same 13.8v PS that
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
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
I guess it depends upon which Astron model you are working with. I've worked
with a great many RS and RM Astron supplies in Ham and Commercial systems
over the years and have never encountered one that made more than a very,
very quiet hum.
I'm not sure what you mean about the regulator not
Of Don Wilhelm
Sent: Tuesday, September 18, 2012 1:44 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K-Line Addition - DC Power Supply (Suggestion)
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
On Tue, 2012-09-18 at 14:14 -0700, Ron D'Eau Claire wrote:
...
I'm not sure what you mean about the regulator not being quiet. The LM723
is a simple linear I.C.; no switching noise and no acoustical noise.
...
It's true that the 723 is a really ancient IC - it was designed back in
the 70's I
@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
Regarding the certifications for mains power equipment running off of various
mains circuits in various countries, don't forget that Elecraft has already
done that with the KPA500.
73 Ron AC7AC
-Original Message-
...Don mentioned certifications for each country. Don't forget the
I've fixed two Astrons for friends. One had a burned-out IC and the
other had a damaged board where the capacitor mounting screws had
loosened and generated heat. Both failed without producing overvoltage.
I have one that I've been using for perhaps 15 years with no problems.
On 9/18/12 2:14
The Astron supplies usually have a crowbar on the output which shorts the
output if the voltage rises above 15 Volts.
Sent from my iPad
On Sep 18, 2012, at 5:51 PM, Vic, K2VCO k2vco@gmail.com wrote:
I've fixed two Astrons for friends. One had a burned-out IC and the
other had a damaged
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