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Looking for miniature 14-V power supply for travel use

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wayne burdick

Looking for miniature 14-V power supply for travel use

Administrator

I'm going to take a KX3 with me on vacation this summer, and I like to
travel light. I'll have internal batteries for field operation, but
for indoor use, I'm hoping to find a miniature power supply that meets
these criteria:

- very small (say 4 x 3 x 1 inches)
- light weight (less than 1 lb)
- 2 A min. peak output current
- 13 to 14 VDC output voltage
- input AC voltage range of 100-130 V
- low noise

I'm sure it will have to be a switching supply. The question is
whether any exist with this form-factor that are also quiet from an RF
perspective.

Anyone know of such a unit?

73,
Wayne
N6KR

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Nick Garner

Re: Looking for miniature 14-V power supply for travel use

I use one of these:
http://www.gammaresearch.net/hps-1a.html

73,
Nick
N3WG
On Jul 4, 2011 2:23 PM, "Wayne Burdick" <[hidden email]> wrote:

> I'm going to take a KX3 with me on vacation this summer, and I like to
> travel light. I'll have internal batteries for field operation, but
> for indoor use, I'm hoping to find a miniature power supply that meets
> these criteria:
>
> - very small (say 4 x 3 x 1 inches)
> - light weight (less than 1 lb)
> - 2 A min. peak output current
> - 13 to 14 VDC output voltage
> - input AC voltage range of 100-130 V
> - low noise
>
> I'm sure it will have to be a switching supply. The question is
> whether any exist with this form-factor that are also quiet from an RF
> perspective.
>
> Anyone know of such a unit?
>
> 73,
> Wayne
> N6KR
>
>
>
> ______________________________________________________________
> 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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Robert Friess

Re: Looking for miniature 14-V power supply for travel use

In reply to this post by wayne burdick

Jameco has a lot of these. Not sure how quiet, but they are cheap enough
that you could buy 2 or 3 and pick the best.

Bob, N6CM

On Mon, Jul 4, 2011 at 2:23 PM, Wayne Burdick <[hidden email]> wrote:

Rick Dettinger-3

Re: Looking for miniature 14-V power supply for travel use

In reply to this post by wayne burdick

Well, Chief Engineer Wayne, sounds to me like a good idea for a mini
kit !

73,
Rick Dettinger K7MW

On Jul 4, 2011, at 2:23 PM, Wayne Burdick wrote:

wayne burdick

Re: Looking for miniature 14-V power supply for travel use

Administrator

In reply to this post by Nick Garner

Yes, the HPS-1a is a great supply. But it's about twice the size and
weight I'm looking for.

A "wall wart" supply would be fine as long as it meets all of the
criteria and is well-regulated.

Wayne
N6KR

On Jul 4, 2011, at 2:27 PM, Nick Garner wrote:

> I use one of these:
> http://www.gammaresearch.net/hps-1a.html
>
> 73,
> Nick
> N3WG
>
> On Jul 4, 2011 2:23 PM, "Wayne Burdick" <[hidden email]> wrote:
> > I'm going to take a KX3 with me on vacation this summer, and I
> like to
> > travel light. I'll have internal batteries for field operation, but
> > for indoor use, I'm hoping to find a miniature power supply that
> meets
> > these criteria:
> >
> > - very small (say 4 x 3 x 1 inches)
> > - light weight (less than 1 lb)
> > - 2 A min. peak output current
> > - 13 to 14 VDC output voltage
> > - input AC voltage range of 100-130 V
> > - low noise
> >
> > I'm sure it will have to be a switching supply. The question is
> > whether any exist with this form-factor that are also quiet from
> an RF
> > perspective.
> >
> > Anyone know of such a unit?
> >
> > 73,
> > Wayne
> > N6KR
> >
> >
> >
> > ______________________________________________________________
> > 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

wayne burdick

Re: Looking for miniature 14-V power supply for travel use

Administrator

In reply to this post by Rick Dettinger-3

Can't roll our own in time for my vacation :)

Wayne
N6KR

On Jul 4, 2011, at 2:39 PM, Rick Dettinger wrote:

> Well, Chief Engineer Wayne, sounds to me like a good idea for a mini
> kit !
>
> 73,
> Rick Dettinger K7MW
>
>
>
>
> On Jul 4, 2011, at 2:23 PM, Wayne Burdick wrote:
>
>> I'm going to take a KX3 with me on vacation this summer, and I like
>> to
>> travel light. I'll have internal batteries for field operation, but
>> for indoor use, I'm hoping to find a miniature power supply that
>> meets
>> these criteria:
>>
>> - very small (say 4 x 3 x 1 inches)
>> - light weight (less than 1 lb)
>> - 2 A min. peak output current
>> - 13 to 14 VDC output voltage
>> - input AC voltage range of 100-130 V
>> - low noise
>>
>> I'm sure it will have to be a switching supply. The question is
>> whether any exist with this form-factor that are also quiet from an
>> RF
>> perspective.
>>
>> Anyone know of such a unit?
>>
>> 73,
>> Wayne
>> N6KR
>>
>>
>>
>> ______________________________________________________________
>> 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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Bob Nielsen-2

Re: Looking for miniature 14-V power supply for travel use

In reply to this post by wayne burdick

I have used a MFJ-4103 with my K2 with good results. It's close to your desired form factor and was quiet on 20 meters (I haven't tried it on other bands). I also used it on 220V/50Hz in EU.

Bob, N7XY

On Jul 4, 2011, at 2:23 PM, Wayne Burdick wrote:

_____
N7XY DX Cluster Node - telnet to n7xy.net, port 7300

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Rick Dettinger-3

Re: Looking for miniature 14-V power supply for travel use

In reply to this post by wayne burdick

OK, but it would still make a great mini kit. Especially since there
may not be an acceptable substitute.

Rick K7MW

On Jul 4, 2011, at 2:44 PM, Wayne Burdick wrote:

> Can't roll our own in time for my vacation :)
>
> Wayne
> N6KR
>
> On Jul 4, 2011, at 2:39 PM, Rick Dettinger wrote:
>
>> Well, Chief Engineer Wayne, sounds to me like a good idea for a
>> mini kit !
>>
>> 73,
>> Rick Dettinger K7MW
>>
>>
>>
>>
>> On Jul 4, 2011, at 2:23 PM, Wayne Burdick wrote:
>>
>>> I'm going to take a KX3 with me on vacation this summer, and I
>>> like to
>>> travel light. I'll have internal batteries for field operation, but
>>> for indoor use, I'm hoping to find a miniature power supply that
>>> meets
>>> these criteria:
>>>
>>> - very small (say 4 x 3 x 1 inches)
>>> - light weight (less than 1 lb)
>>> - 2 A min. peak output current
>>> - 13 to 14 VDC output voltage
>>> - input AC voltage range of 100-130 V
>>> - low noise
>>>
>>> I'm sure it will have to be a switching supply. The question is
>>> whether any exist with this form-factor that are also quiet from
>>> an RF
>>> perspective.
>>>
>>> Anyone know of such a unit?
>>>
>>> 73,
>>> Wayne
>>> N6KR
>>>
>>>
>>>
>>> ______________________________________________________________
>>> 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
>

wayne burdick

Re: Looking for miniature 14-V power supply for travel use

Administrator

In reply to this post by Bob Nielsen-2

This one does look promising, Bob--thanks.

I've also found some possible units at Jameco, which happens to be
about a mile down the road (thank you, N6CM, for reminding me).

Wayne
N6KR

On Jul 4, 2011, at 2:46 PM, Bob Nielsen wrote:

> I have used a MFJ-4103 with my K2 with good results. It's close to
> your desired form factor and was quiet on 20 meters (I haven't tried
> it on other bands). I also used it on 220V/50Hz in EU.
>
> Bob, N7XY
>
> On Jul 4, 2011, at 2:23 PM, Wayne Burdick wrote:
>
>> I'm going to take a KX3 with me on vacation this summer, and I like
>> to
>> travel light. I'll have internal batteries for field operation, but
>> for indoor use, I'm hoping to find a miniature power supply that
>> meets
>> these criteria:
>>
>> - very small (say 4 x 3 x 1 inches)
>> - light weight (less than 1 lb)
>> - 2 A min. peak output current
>> - 13 to 14 VDC output voltage
>> - input AC voltage range of 100-130 V
>> - low noise
>>
>> I'm sure it will have to be a switching supply. The question is
>> whether any exist with this form-factor that are also quiet from an
>> RF
>> perspective.
>>
>> Anyone know of such a unit?
>>
>> 73,
>> Wayne
>> N6KR
>>
>>
>>
>> ______________________________________________________________
>> 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
>
> _____
> N7XY DX Cluster Node - telnet to n7xy.net, port 7300
>
>
>
>
>
> ______________________________________________________________
> 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

wayne burdick

Re: Looking for miniature 14-V power supply for travel use

Administrator

In reply to this post by wayne burdick

Thanks, Randy. This is even smaller than the MFJ-4103.

The web site indicates a noise problem without proper grounding. Have
you found this to be an issue? They mention supplying a "2-pin"
standard power connector, which is *not* what you want if you're
trying to get a good common ground back to the AC jack. Is that a typo
-- i.e., do they actually supply a 3-pin AC plug?

Thanks,
Wayne
N6KR

On Jul 4, 2011, at 3:00 PM, Randy Moore wrote:

> Wayne, I've had good luck with this:
>
> http://www.mtechnologies.com/cup/
>
> 73,
> Randy, KS4L
>
> On Jul 4, 2011, at 4:23 PM, Wayne Burdick <[hidden email]> wrote:
>
>> I'm going to take a KX3 with me on vacation this summer, and I like
>> to
>> travel light. I'll have internal batteries for field operation, but
>> for indoor use, I'm hoping to find a miniature power supply that
>> meets
>> these criteria:
>>
>> - very small (say 4 x 3 x 1 inches)
>> - light weight (less than 1 lb)
>> - 2 A min. peak output current
>> - 13 to 14 VDC output voltage
>> - input AC voltage range of 100-130 V
>> - low noise
>>
>> I'm sure it will have to be a switching supply. The question is
>> whether any exist with this form-factor that are also quiet from an
>> RF
>> perspective.
>>
>> Anyone know of such a unit?
>>
>> 73,
>> Wayne
>> N6KR
>>
>>
>>
>> ______________________________________________________________
>> 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

GARY-2

Re: Looking for miniature 14-V power supply for travel use

In reply to this post by wayne burdick

Wayne,
Take a look at these:
<http://www.automationdirect.com/static/specs/rhinopss.pdf>
I realize they're a little bigger than you're looking for but not by much.
The 12Vdc/100 watt unit sells for less than $30. Output is adjustable
11-14Vdc.
Gary
N6LRV

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of Wayne Burdick
Sent: Monday, July 04, 2011 2:23 PM
To: Elecraft Reflector
Subject: [Elecraft] Looking for miniature 14-V power supply for travel use

I'm going to take a KX3 with me on vacation this summer, and I like to
travel light. I'll have internal batteries for field operation, but
for indoor use, I'm hoping to find a miniature power supply that meets
these criteria:

- very small (say 4 x 3 x 1 inches)
- light weight (less than 1 lb)
- 2 A min. peak output current
- 13 to 14 VDC output voltage
- input AC voltage range of 100-130 V
- low noise

I'm sure it will have to be a switching supply. The question is
whether any exist with this form-factor that are also quiet from an RF
perspective.

Anyone know of such a unit?

73,
Wayne
N6KR

______________________________________________________________
Elecraft mailing list
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Rick Tavan N6XI

Re: Looking for miniature 14-V power supply for travel use

In reply to this post by wayne burdick

Or consider sticking with batteries using the inexpensive and tiny PST-3P10 charger on the same page at Mtechnologies. I haven't used it but the specs look good.

Rick

On Jul 4, 2011, at 3:09 PM, Wayne Burdick <[hidden email]> wrote:

> Thanks, Randy. This is even smaller than the MFJ-4103.
>
> The web site indicates a noise problem without proper grounding. Have
> you found this to be an issue? They mention supplying a "2-pin"
> standard power connector, which is *not* what you want if you're
> trying to get a good common ground back to the AC jack. Is that a typo
> -- i.e., do they actually supply a 3-pin AC plug?
>
> Thanks,
> Wayne
> N6KR
>
> On Jul 4, 2011, at 3:00 PM, Randy Moore wrote:
>
>> Wayne, I've had good luck with this:
>>
>> http://www.mtechnologies.com/cup/
>>
>> 73,
>> Randy, KS4L
>>
>> On Jul 4, 2011, at 4:23 PM, Wayne Burdick <[hidden email]> wrote:
>>
>>> I'm going to take a KX3 with me on vacation this summer, and I like
>>> to
>>> travel light. I'll have internal batteries for field operation, but
>>> for indoor use, I'm hoping to find a miniature power supply that
>>> meets
>>> these criteria:
>>>
>>> - very small (say 4 x 3 x 1 inches)
>>> - light weight (less than 1 lb)
>>> - 2 A min. peak output current
>>> - 13 to 14 VDC output voltage
>>> - input AC voltage range of 100-130 V
>>> - low noise
>>>
>>> I'm sure it will have to be a switching supply. The question is
>>> whether any exist with this form-factor that are also quiet from an
>>> RF
>>> perspective.
>>>
>>> Anyone know of such a unit?
>>>
>>> 73,
>>> Wayne
>>> N6KR
>>>
>>>
>>>
>>> ______________________________________________________________
>>> 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]
>
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Phil Salas

Re: Looking for miniature 14-V power supply for travel

In reply to this post by wayne burdick

Wayne - I originally bought a CUP36 a number of years ago to use with my
FT-817. You DO have to purchase an AC cord (it doesn't come with one) - and
it is a 2-pin power cord. I found that the CUP36 was very RF noisy -
particularly from 160-40 meters. I wound up buying a MFJ-4103 which I found
to be RF quiet.

Phil - AD5X

"Thanks, Randy. This is even smaller than the MFJ-4103.

The web site indicates a noise problem without proper grounding. Have
you found this to be an issue? They mention supplying a "2-pin"
standard power connector, which is *not* what you want if you're
trying to get a good common ground back to the AC jack. Is that a typo
-- i.e., do they actually supply a 3-pin AC plug?

Thanks,
Wayne
N6KR"

______________________________________________________________
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wayne burdick

Re: Looking for miniature 14-V power supply for travel

Administrator

Someone else mentioned the same issue. I asked if he had tried RF
chokes, and he hadn't; he just put them on, and the noise disappeared.

Wayne

On Jul 4, 2011, at 5:34 PM, Phil & Debbie Salas wrote:

> Wayne - I originally bought a CUP36 a number of years ago to use
> with my
> FT-817. You DO have to purchase an AC cord (it doesn't come with
> one) - and
> it is a 2-pin power cord. I found that the CUP36 was very RF noisy -
> particularly from 160-40 meters. I wound up buying a MFJ-4103 which
> I found
> to be RF quiet.
>
> Phil - AD5X
>
> "Thanks, Randy. This is even smaller than the MFJ-4103.
>
> The web site indicates a noise problem without proper grounding. Have
> you found this to be an issue? They mention supplying a "2-pin"
> standard power connector, which is *not* what you want if you're
> trying to get a good common ground back to the AC jack. Is that a typo
> -- i.e., do they actually supply a 3-pin AC plug?
>
> Thanks,
> Wayne
> N6KR"
>
> ______________________________________________________________
> 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

Phil Hystad-3

Re: Looking for miniature 14-V power supply for travel

I bought some nice A123 Li batteries for this kind of thing. A 3-cell or 4-cell works great and may even last all day and then some with QRP power. If you had a 100 watt amp, you could run that too! I bought these from Buddipole and they work great. Get the little 10s charger too. Pricey solution but very conveniet. Batteries are extremely RF quiet.

73, phil, K7PEH

On Jul 4, 2011, at 5:51 PM, Wayne Burdick wrote:

> Someone else mentioned the same issue. I asked if he had tried RF
> chokes, and he hadn't; he just put them on, and the noise disappeared.
>
> Wayne
>
> On Jul 4, 2011, at 5:34 PM, Phil & Debbie Salas wrote:
>
>> Wayne - I originally bought a CUP36 a number of years ago to use
>> with my
>> FT-817. You DO have to purchase an AC cord (it doesn't come with
>> one) - and
>> it is a 2-pin power cord. I found that the CUP36 was very RF noisy -
>> particularly from 160-40 meters. I wound up buying a MFJ-4103 which
>> I found
>> to be RF quiet.
>>
>> Phil - AD5X
>>
>> "Thanks, Randy. This is even smaller than the MFJ-4103.
>>
>> The web site indicates a noise problem without proper grounding. Have
>> you found this to be an issue? They mention supplying a "2-pin"
>> standard power connector, which is *not* what you want if you're
>> trying to get a good common ground back to the AC jack. Is that a typo
>> -- i.e., do they actually supply a 3-pin AC plug?
>>
>> Thanks,
>> Wayne
>> N6KR"
>>
>> ______________________________________________________________
>> 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

Jim Sheldon

Re: Looking for miniature 14-V power supply for travel

In reply to this post by wayne burdick

Jim Sheldon

Re: Looking for miniature 14-V power supply for travel

In reply to this post by wayne burdick

Well, it didn't completely disappear, but is attenuated to the point that atmospheric noise is far more of a problem than the p/s noise. On a very quiet band, you'd still hear the p/s but any signals would be strong enough that even a S2 signal would be readable over it. If the KX3's noise blanker/noise reduction is even close to a K3, you'd be able to live with it. Not my choice for a primary QRP power supply, but certainly I'm keeping mine around as backups.

My primary station supply for the 100 watt K3 is an MFJ 4245MV 40 amp Switcher and there is absolutely no noise out of that one that I can find. Far too big to work as a vacation supply.

Jim - W0EB

> Someone else mentioned the same issue. I asked if he had tried RF
> chokes, and he hadn't; he just put them on, and the noise
> disappeared.
>
> Wayne
>
> On Jul 4, 2011, at 5:34 PM, Phil & Debbie Salas wrote:
>
>> Wayne - I originally bought a CUP36 a number of years ago to use
>> with my
>> FT-817. You DO have to purchase an AC cord (it doesn't come with
>> one) - and
>> it is a 2-pin power cord. I found that the CUP36 was very RF
>> noisy -
>> particularly from 160-40 meters. I wound up buying a MFJ-4103
>> which
>> I found
>> to be RF quiet.
>>
>> Phil - AD5X
>>
>> "Thanks, Randy. This is even smaller than the MFJ-4103.
>>
>> The web site indicates a noise problem without proper grounding.
>> Have
>> you found this to be an issue? They mention supplying a "2-pin"
>> standard power connector, which is *not* what you want if you're
>> trying to get a good common ground back to the AC jack. Is that a
>> typo
>> -- i.e., do they actually supply a 3-pin AC plug?
>>
>> Thanks,
>> Wayne
>> N6KR"
>>
>> ______________________________________________________________
>> 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
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>
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Al Gulseth-2

Re: Looking for miniature 14-V power supply for travel use

In reply to this post by wayne burdick

Wayne,

When you do find what you're looking for in a power supply please let us know
what it is and how it works out. I'm sure I'm not the only one who'd be
interested in the results of your "research".

BTW other than most of them are marked as 12V (with typical output actually in
the 12-12.6V range) little switchers of this type made for consumer
electronics are very plentiful at thrift shops and yard sales (sometimes for
less than a buck.) However, needless to say YMMV on the RFI issue though....

TNX/73, Al

On Mon July 4 2011 4:23:14 pm Wayne Burdick wrote:

Dick Dievendorff

Re: Looking for miniature 14-V power supply for travel use

In reply to this post by Rick Dettinger-3

Maybe Gamma Research's HPS-1a at http://www.gammaresearch.net/hps-1a.html
will meet your needs.

It's 3.37" x 1.55 x 5.25", specified to provide 5A continuous and 22A at a
25% duty cycle. It weighs 1.25 pounds (which probably doesn't include the
line cord)

I have one for my K3, and it works acceptably on CW, but I wouldn't use it
for a RTTY contest.

I recall that it has about a 5 Farad output capacitance and the caps are
operated very close to their rated limit. My recollection may be fuzzy.

Their web site shows "temporarily out of stock" and to expect a delay after
placing an order.

Perhaps one of your employees might loan his if you can't get one in time.

73 de Dick, K6KR

On Jul 4, 2011, at 2:23 PM, Wayne Burdick wrote:

> I'm going to take a KX3 with me on vacation this summer, and I like to
> travel light. I'll have internal batteries for field operation, but
> for indoor use, I'm hoping to find a miniature power supply that meets
> these criteria:
>
> - very small (say 4 x 3 x 1 inches)
> - light weight (less than 1 lb)
> - 2 A min. peak output current
> - 13 to 14 VDC output voltage
> - input AC voltage range of 100-130 V
> - low noise
>
> I'm sure it will have to be a switching supply. The question is
> whether any exist with this form-factor that are also quiet from an RF
> perspective.
>
> Anyone know of such a unit?
>
> 73,
> Wayne
> N6KR
>
>
>
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Michael Babineau-2

Re: Looking for miniature 14-V power supply for travel use

In reply to this post by wayne burdick

Wayne :

I have also had good luck with the CUPS supply that Randy mentioned from Morse Express / Milestone Technologies
with both my K1 / K2 and i have never had any issues with noise.

BTW It is only supplied with a 2 prong plug.

Michael VE3WMB

>From: Wayne Burdick <[hidden email]>
>Date: July 4, 2011 6:09:02 PM EDT
>To: Randy Moore <[hidden email]>
>Cc: Elecraft Reflector <[hidden email]>
>Subject: Re: [Elecraft] Looking for miniature 14-V power supply for travel use

>Thanks, Randy. This is even smaller than the MFJ-4103.

>The web site indicates a noise problem without proper grounding. Have you found this to be an issue? They mention supplying a "2-pin" standard power connector, which is *not* what you want if you're >trying to get a good common ground back to the AC jack. Is that a typo -- i.e., do they actually supply a 3-pin AC plug?

>Thanks,
>Wayne
>N6KR

>On Jul 4, 2011, at 3:00 PM, Randy Moore wrote:
>
> Wayne, I've had good luck with this:
>
> http://www.mtechnologies.com/cup/

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