The 6 amp Astron would not do the job. He needs a supply capable of
more like 20 to 25 amperes to handle the load presented by the rig plus
the amplifier. The Astron 20 or 35 ampere models should do the job,
with the 35 amp version having some extra reserve so he could run the
rigs he describes plus something else, such as a separate VHF/UHF FM
transceiver.
My K2 plus the combination KPA100 / KAT100 in an EC2 draws 17 to 20
amperes at 100 watts output, depending on band and the actual voltage of
the "12 volt" source.
As you state, there are are some good 25 amp switchers out there, such
as the MFJ 4125 and the Astron SS-25 that have been tested for low RF
noise.
- Jim, KL7CC
On 6/26/2013 7:36 PM, Don Wilhelm wrote:
The Astron 6 amp linear supply comes to mind. There are some good
switchers out there, see the ARRL Product reviews for an independent
assessment.
73,
Don W3FPR
On 6/26/2013 6:24 PM, kg4olw wrote:
Just as an update I am trying to tune in a very weak signal am radio
station.
Another thing i noticed today while messing around is that besides noise
from the pc, I also experienced additional noise when it is plugged
into my
bargain bin pyramid 25amp switching power supply. I never noticed
this on
HF, so maybe it is just more pronounced on AM. Any suggestions on a good
linear power supply that will also support the draw of the kxpa100?
--
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