[Elecraft] Power Supplies for K3

[Fred Smith]

There is a much newer one in QST in the last 18 mo or so don't remember any
of those on it but maybe the Daiwa maybe a different model.


73,
Fred/N0AZZ
K3 Ser #'s 6730/5299--KX3 # 2573--K2/100--KAT100
P3/SVGA--KPA500--KAT500--W2



-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Reinaldo Leandro,
YV5AM
Sent: Thursday, June 13, 2013 1:17 PM
To: 'Elecraft Reflector'
Subject: Re: [Elecraft] Power Supplies for K3

The July 2006 issue of QST carries an updated article reviewing power
supplies:
Switching Power Supplies:
• DAIWA SS-330W
• KENWOOD KPS-15
• MFJ-4125
• TEN-TEC 963

Do not forget the Gamma Research HPS-1a Switching Power Supply, reviewed in
Sep 2007.
I use it when operating away from home. Nothing can beat the small size and
weight.
73

Reinaldo, YV5AM

-----Original Message-----
From: Dave Hachadorian [mailto:k6ll.dave at gmail.com]
Sent: miércoles, 12 de junio de 2013 15:28
To: Elecraft Reflector
Subject: Re: [Elecraft] Power Supplies for K3

It was interesting to re-read the ARRL reviews of some of the switching
supplies:
http://www.arrl.org/files/file/protected/Group/Members/ProductReview/pdf/pr0
001.pdf

The switchers were fairly RF-quiet at low current draw, and then created
more noise as they drew more current.  This is fine for the usual
single-transmitter ham station, but could be an issue in so2r or multiop.

I use a single Astron RS-35A analog supply for so2r with two K3's.  It works
great, and it is a fail-safe way to ensure that both K3's can not transmit
at the same time. The supply will simply groan and give up!

Astron linear supplies also have a simple (internal) voltage adjustment, so
you can pump the voltage up to 14.5 for reduced IMD.

Dave Hachadorian, K6LL
Yuma, Arizona











































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