And they're sold out.
________________________________
John T. Gwin
[email protected]
[email protected]
----- Original Message -----
From: "Matt Zilmer" <[email protected]>
To: "Jim Sheldon" <[email protected]>
Cc: "Elecraft Mailing List" <[email protected]>
Sent: Saturday, December 22, 2012 2:05 PM
Subject: Re: [Elecraft] KX3 - inexpensive - 14 volt @ 4 amp P/S
Most in this class of PSU use PTCs, not fuses.
73,
matt W6NIA
On Sat, 22 Dec 2012 13:08:27 -0600, you wrote:
Hi all you KX3 guys,
After Chuck, KE9UW posted the link to this little 14 volt supply on eBay,
I ordered one and said I'd report back after it came in. Got it this
morning and measured the output voltage. Mine sits right at 13.8 volts,
so I immediately hooked it up to the KX3. Full load with the KX3 key down
putting out 12 watts, the thing sits pretty much rock solid at 13.6 and
key up it goes back to 13.8 and stays there so it's got good regulation
and will handle the rig nicely. The power cord is ferrite choked right
where it comes out of the supply and the plug, even though it isn't a
right angle one, fits the KX3's power jack perfectly.
Next, I started looking for birdies using the KX3 with a 4" pickup loop I
made with a BNC to double binding post adapter. The P/S box has an LED
indicator on it and with the loop laid on the case near the LED, I got
some pretty loud broadband noise that covered everything from 160-6
meters, but fell off and was undetectable with the loop 4 inches from the
box. I ran through each band individually and could find no birdies
attributable to this power supply in any ham band 160-6 meters. This was
confirmed by shutting the supply down whenever I found noise or carrier
type birdies and they stayed where they were.
For less than 9 bucks this supply appears to be really pretty decent to
carry along. It has at least a 3 foot AC cord that plugs into the box and
the output cord is very close to 5 feet long so you have a lot of leeway
in P/S placement. According to the specs shown on eBay, it has both over
current and over voltage protection. I didn't short out the plug to find
out if it shut down would blow an internal fuse as the supply is sealed
and I didn't want to chance ruining it before getting a chance to take it
on a trip.
I've been using it this morning to power the KX3 on the bench and hanging
out around 14.060 looking for QRP contacts. The KX3's voltage monitor is
indicating right at 13.8 volts and .250 milliamps of current. Backlight
is on, audio set to 20 with VFO noise reduction on, RX isolation on and
the 20db preamp is on so 250 milliamps is just about right for current
draw at 13.8V.
Pretty decent lilttle supply for the money and RF wise, it's extremely
quiet compared to some I've seen.
Jim - W0EB
I use this one...14 volts, 4 amps. The plug on it fits the KX3 and
the open ckt voltage is 14 vdc exactly.
http://www.ebay.com/itm/KSAS065-65W-Adapter-power-supply-Output-
14Vdc-4A-2-1mm-plug-NEW-FREE-SHIP-
/261135859531?pt=US_Monitor_Power_Supplies&hash=item3ccce8ff4b
Chuck, KE9UW
Lionel Trains, TCA, LCCA, LRRC
aka Jack, BMW Motorcycles BMWMOA #224
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