The only thing that bit me: Astron XX does not mean XX amps. I have an
Astron 25M and I was trying to figure out why my K2/100 would power off
on 15M at 100W when I finally figured out that that the Astron 25 is a
20 amp power supply and my K2 needed a bit more. It would even fold
back the voltage. After more debugging (and lots of bypass caps &
chokes and dummy loads and a brand new oscilloscope) and I found that RF
in the shack could be part of the problem but just swapping to an Astron
35M was my fix.
Unfortunately, the Astron puts out a lot of heat, and my shack happens
to be in a room that gets pretty warm even with the A/C on. So I changed
to a 25A switching power supply which unfortunately has a fan. Now the
tradeoff is heat vs. fan.
On Tue, 19 Nov 2013, Don Wilhelm wrote:
Bob,
The old reliable Astron 35 is a very good linear supply - I do not have the
metered version, and mine sits quietly on the floor under the desk, no need
to look at meters there.
I also have an Astron SS30 which does a great job at the workbench. Again no
need for meters, and even though a switcher, I have not found any switching
noise created in the ham bands.
As backups, I have an MFJ 25 amp switching supply and an Alinco 340M linear -
the advantages of those supplies is that the output voltage is front panel
adjustable. No noticeable noise from the switcher and the current is more
than sufficient for the K3/100.
If you have other accessories, you might want to look at a 35 amp supply, but
20 or 25 amps is all that is needed for the K3.
73,
Don W3FPR
On 11/19/2013 9:35 AM, Robert Nobis wrote:
I m about ready to place an order for a K3 and P3, and wonder if there are
recommendations on a reliable DC power supply for the Elecraft 100-W
transceiver.
73,
Bob - N7RJN
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
--
Hisashi T Fujinaka - ht...@twofifty.com
BSEE(6/86) + BSChem(3/95) + BAEnglish(8/95) + MSCS(8/03) + $2.50 = latte
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
