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KX3 - inexpensive - 14 volt @ 4 amp P/S

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Jim Sheldon

KX3 - inexpensive - 14 volt @ 4 amp P/S

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
>

Matt Zilmer

Re: 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
>>
>______________________________________________________________
>Elecraft mailing list
>Home: http://mailman.qth.net/mailman/listinfo/elecraft
>Help: http://mailman.qth.net/mmfaq.htm
>Post: mailto:[hidden email]
>
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>Please help support this email list: http://www.qsl.net/donate.html

W4SK

Re: KX3 - inexpensive - 14 volt @ 4 amp P/S

And they're sold out.
________________________________
John T. Gwin
[hidden email]
[hidden email]
----- Original Message -----
From: "Matt Zilmer" <[hidden email]>
To: "Jim Sheldon" <[hidden email]>
Cc: "Elecraft Mailing List" <[hidden email]>
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
>>>
>>______________________________________________________________
>>Elecraft mailing list
>>Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>Help: http://mailman.qth.net/mmfaq.htm
>>Post: mailto:[hidden email]
>>
>>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:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
>
> -----
> No virus found in this message.
> Checked by AVG - www.avg.com
> Version: 2012.0.2221 / Virus Database: 2637/5478 - Release Date: 12/22/12
>

Dr. William J. Schmidt, II

Re: KX3 - inexpensive - 14 volt @ 4 amp P/S

Dell makes a AD-4214N power supply that is about the same thing... that you
can find at the flea markets for almost nothing...

Dr. William J. Schmidt - K9HZ / J68HZ/ 8P6HK/ ZF2HZ

Owner - Operator
Big Signal Ranch
Staunton, Illinois

email: [hidden email]

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of W4SK
Sent: Saturday, December 22, 2012 3:25 PM
To: [hidden email]; Jim Sheldon
Cc: Elecraft Mailing List
Subject: Re: [Elecraft] KX3 - inexpensive - 14 volt @ 4 amp P/S

And they're sold out.
________________________________
John T. Gwin
[hidden email]
[hidden email]
----- Original Message -----
From: "Matt Zilmer" <[hidden email]>
To: "Jim Sheldon" <[hidden email]>
Cc: "Elecraft Mailing List" <[hidden email]>
Sent: Saturday, December 22, 2012 2:05 PM
Subject: Re: [Elecraft] KX3 - inexpensive - 14 volt @ 4 amp P/S

>>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
>>>
>>______________________________________________________________
>>Elecraft mailing list
>>Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>Help: http://mailman.qth.net/mmfaq.htm
>>Post: mailto:[hidden email]
>>
>>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:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
>
> -----
> No virus found in this message.
> Checked by AVG - www.avg.com
> Version: 2012.0.2221 / Virus Database: 2637/5478 - Release Date: 12/22/12
>

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2013.0.2805 / Virus Database: 2637/5978 - Release Date: 12/22/12

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

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Please help support this email list: http://www.qsl.net/donate.html

Jim Sheldon

Re: KX3 - inexpensive - 14 volt @ 4 amp P/S

Yup, it's a power supply that works with some Dell and Samsung monitors. Might be identical to the Ktec supply I got off ebay - pretty much same specs. Since it's meant to power a computer monitor, I'd bet it's pretty quiet in the RFI department as well.

Look up Dell AD-4214N on Google and you'll get a host of replacement ones. Cheapest one I saw in the "new" department was $19 but like Bill said, you can probably find one at a ham (or other) flea market for next to nothing.

W0EB

> Dell makes a AD-4214N power supply that is about the same thing...
> that you
> can find at the flea markets for almost nothing...
>
>
> Dr. William J. Schmidt - K9HZ / J68HZ/ 8P6HK/ ZF2HZ
>
> Owner - Operator
> Big Signal Ranch
> Staunton, Illinois
>
> email: [hidden email]
>
>
> -----Original Message-----
> From: [hidden email]
> [mailto:[hidden email]] On Behalf Of W4SK
> Sent: Saturday, December 22, 2012 3:25 PM
> To: [hidden email]; Jim Sheldon
> Cc: Elecraft Mailing List
> Subject: Re: [Elecraft] KX3 - inexpensive - 14 volt @ 4 amp P/S
>
> And they're sold out.
> ________________________________
> John T. Gwin
> [hidden email]
> [hidden email]
> ----- Original Message -----
> From: "Matt Zilmer" <[hidden email]>
> To: "Jim Sheldon" <[hidden email]>
> Cc: "Elecraft Mailing List" <[hidden email]>
> 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
>>>>
>>> ______________________________________________________________
>>> Elecraft mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:[hidden email]
>>>
>>> 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:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list:
>> http://www.qsl.net/donate.html
>>
>>
>> -----
>> No virus found in this message.
>> Checked by AVG - www.avg.com
>> Version: 2012.0.2221 / Virus Database: 2637/5478 - Release Date:
>> 12/22/12
>>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> -----
> No virus found in this message.
> Checked by AVG - www.avg.com
> Version: 2013.0.2805 / Virus Database: 2637/5978 - Release Date:
> 12/22/12

Keith Heimbold

Re: KX3 - inexpensive - 14 volt @ 4 amp P/S

In reply to this post by W4SK

I bought one about five minutes after that post arrived today. Fits well in my KX3 travel pack.

Keith
AK6ZZ

Sent from my iPhone please excuse typos

On Dec 22, 2012, at 1:25 PM, "W4SK" <[hidden email]> wrote:

> And they're sold out.
> ________________________________
> John T. Gwin
> [hidden email]
> [hidden email]
> ----- Original Message ----- From: "Matt Zilmer" <[hidden email]>
> To: "Jim Sheldon" <[hidden email]>
> Cc: "Elecraft Mailing List" <[hidden email]>
> 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
>>> ______________________________________________________________
>>> Elecraft mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:[hidden email]
>>>
>>> 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:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>>
>>
>> -----
>> No virus found in this message.
>> Checked by AVG - www.avg.com
>> Version: 2012.0.2221 / Virus Database: 2637/5478 - Release Date: 12/22/12
>
> ______________________________________________________________
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