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very small 20A switching PS

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Howard Sherer

very small 20A switching PS

A few years ago there was some discussion here about a very small 12 v
20A switching PSU with very low noise that was designed for radio use. I
am now interested in one for use with my KX3 & KXPA. Can someone point
me in the right direction.

Howard AE3T

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Nick Garner

Re: very small 20A switching PS

I have used the Gamma Research HPS-1a for several years and love it. It
fits easily in my K3 pelican case. . Output is 22A at 25 percent duty.

http://www.gammaresearch.net/hps-1a.html

Nick
N3WG
On Sep 21, 2014 7:51 PM, "Howard Sherer" <[hidden email]> wrote:

> A few years ago there was some discussion here about a very small 12 v 20A
> switching PSU with very low noise that was designed for radio use. I am now
> interested in one for use with my KX3 & KXPA. Can someone point me in the
> right direction.
>
> Howard AE3T
>
> ______________________________________________________________
> 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
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> Message delivered to [hidden email]
>

NK7Z

Re: very small 20A switching PS

In reply to this post by Howard Sherer

Hi Howard,
I did a total shack cleanup when I got the Elecraft K3... The details
are here:
http://nk7z.net/rebuilding-the-shack/
look about halfway down in the article, under "The Final Layout", and to
the left is a photo and in the text is a link to the PS I use... 25
amps, small, and as quiet as they come as far as I can tell...

--
Thanks and 73's,
For equipment, and software setups and reviews see:
www.nk7z.net
for MixW support see;
http://groups.yahoo.com/neo/groups/mixw/info
for Dopplergram information see:
http://groups.yahoo.com/neo/groups/dopplergram/info
for MM-SSTV see:
http://groups.yahoo.com/neo/groups/MM-SSTV/info

On Sun, 2014-09-21 at 06:50 -0400, Howard Sherer wrote:

> A few years ago there was some discussion here about a very small 12 v
> 20A switching PSU with very low noise that was designed for radio use. I
> am now interested in one for use with my KX3 & KXPA. Can someone point
> me in the right direction.
>
> Howard AE3T
>
> ______________________________________________________________
> 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
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Charlie T, K3ICH

Re: very small 20A switching PS

In reply to this post by Howard Sherer

"Gamma" something.

Basically, a bank of Super Capacitors fed by a 5 (?) Amp switching supply.
And yes, VERY small (& very expensive too) even when compared with the
smaller 25 Amp switching supplies. However, those "larger" supplies can do
20 Amps continuously, but the Gamma can not.

73, Charlie k3ICH

----- Original Message -----
From: "Howard Sherer" <[hidden email]>
To: <[hidden email]>
Sent: Sunday, September 21, 2014 6:50 AM
Subject: [Elecraft] very small 20A switching PS

>A few years ago there was some discussion here about a very small 12 v 20A
>switching PSU with very low noise that was designed for radio use. I am now
>interested in one for use with my KX3 & KXPA. Can someone point me in the
>right direction.
>
> Howard AE3T
>
> ______________________________________________________________
> 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
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Johnny Siu

very small 20A switching PS

Hello Charlie,

I agree with you and am using Alinco DM-330MVE. I like Gamma but it is too expensive for me.

73

Johnny VR2XMC

________________________________
寄件人︰ "Charlie T, K3ICH" <[hidden email]>
收件人︰ [hidden email]
傳送日期︰ 2014年09月21日 (週日) 8:00 PM
主題︰ Re: [Elecraft] very small 20A switching PS

"Gamma" something.

Basically, a bank of Super Capacitors fed by a 5 (?) Amp switching supply.
And yes, VERY small (& very expensive too) even when compared with the
smaller 25 Amp switching supplies. However, those "larger" supplies can do
20 Amps continuously, but the Gamma can not.

73, Charlie k3ICH

----- Original Message -----
From: "Howard Sherer" <[hidden email]>
To: <[hidden email]>
Sent: Sunday, September 21, 2014 6:50 AM
Subject: [Elecraft] very small 20A switching PS

>A few years ago there was some discussion here about a very small 12 v 20A
>switching PSU with very low noise that was designed for radio use. I am now
>interested in one for use with my KX3 & KXPA. Can someone point me in the
>right direction.
>
> Howard AE3T
>
> ______________________________________________________________
> 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
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Charlie T, K3ICH

Re: very small 20A switching PS

In reply to this post by Charlie T, K3ICH

Curiously, I have found that certain switching supplies can actually deliver
quite a bit more peak, or very short duration current than their ratings
would imply. For example I was testing a TS-480 HX running from a 25 Amp
Astron switcher and was getting the full rated 200 watts out momentarily
with barely noticeable voltage sag. At this level, the total supply
current was around 35 Amps. Now, admittedly, I did not look at the DC
waveform on a scope, but the SSB transmit audio sounded fine which to me,
implied it was clean. I'll have to try again and look at the waveform.
It'll have to be with resistor loads since I don't own the HX now.

73, Charlie k3ICH

----- Original Message -----
From: "Charlie T, K3ICH" <[hidden email]>
To: <[hidden email]>
Sent: Sunday, September 21, 2014 8:00 AM
Subject: Re: [Elecraft] very small 20A switching PS

> "Gamma" something.
>
> Basically, a bank of Super Capacitors fed by a 5 (?) Amp switching supply.
> And yes, VERY small (& very expensive too) even when compared with the
> smaller 25 Amp switching supplies. However, those "larger" supplies can
> do 20 Amps continuously, but the Gamma can not.
>
> 73, Charlie k3ICH
>
>
> ----- Original Message -----
> From: "Howard Sherer" <[hidden email]>
> To: <[hidden email]>
> Sent: Sunday, September 21, 2014 6:50 AM
> Subject: [Elecraft] very small 20A switching PS
>
>
>>A few years ago there was some discussion here about a very small 12 v 20A
>>switching PSU with very low noise that was designed for radio use. I am
>>now interested in one for use with my KX3 & KXPA. Can someone point me in
>>the right direction.
>>
>> Howard AE3T
>>
>> ______________________________________________________________
>> 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
>> Message delivered to [hidden email]
>
> ______________________________________________________________
> 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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Tex

Re: very small 20A switching PS

In reply to this post by Howard Sherer

It's the Gamma Research HPS-1a, had one for use in an RV worked great with my K3 and KX3

73 Tex
ka5y

Craig Smith

Re: very small 20A switching PS

I also had very good results with the Gamma with my K3. In CW mode, it will support an output power of about 75W. More on SSB I would guess.

73 Craig AC0DS
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Jeff Herr

Re: very small 20A switching PS

In reply to this post by Nick Garner

this one is smaller..... http://www.gammaresearch.net/hps-1a.html

than this one...
http://www.powerwerx.com/power-supplies/variable-digital-meters-30-amp-deskt
op-power-supply.html

but the power werx unit is electrically quiet, costs less, has accurate I &
E meters, and is variable.

-----Original Message-----
From: Elecraft [mailto:[hidden email]] On Behalf Of Nick
Garner
Sent: Sunday, September 21, 2014 03:59 AM
To: [hidden email]
Cc: Elecraft Reflector
Subject: Re: [Elecraft] very small 20A switching PS

I have used the Gamma Research HPS-1a for several years and love it. It fits
easily in my K3 pelican case. . Output is 22A at 25 percent duty.

http://www.gammaresearch.net/hps-1a.html

Nick
N3WG
On Sep 21, 2014 7:51 PM, "Howard Sherer" <[hidden email]> wrote:

> A few years ago there was some discussion here about a very small 12 v
> 20A switching PSU with very low noise that was designed for radio use.
> I am now interested in one for use with my KX3 & KXPA. Can someone
> point me in the right direction.
>
> Howard AE3T
>
> ______________________________________________________________
> 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 Message delivered to
> [hidden email]
>

Mike Furrey

Re: very small 20A switching PS

Go with the powerwerx unit. I have, it is a very good, compact power supply.
http://www.powerwerx.com/power-supplies/?gclid=CMD4tdLG8sACFc1i7AodNwMAqw

73, Mike WA5POK

On Sunday, September 21, 2014 10:37 AM, Jeff Herr <[hidden email]> wrote:

this one is smaller..... http://www.gammaresearch.net/hps-1a.html

than this one...
http://www.powerwerx.com/power-supplies/variable-digital-meters-30-amp-deskt
op-power-supply.html

but the power werx unit is electrically quiet, costs less, has accurate I &
E meters, and is variable.

-----Original Message-----
From: Elecraft [mailto:[hidden email]] On Behalf Of Nick
Garner
Sent: Sunday, September 21, 2014 03:59 AM
To: [hidden email]
Cc: Elecraft Reflector
Subject: Re: [Elecraft] very small 20A switching PS

I have used the Gamma Research HPS-1a for several years and love it. It fits
easily in my K3 pelican case. . Output is 22A at 25 percent duty.

http://www.gammaresearch.net/hps-1a.html

Nick
N3WG
On Sep 21, 2014 7:51 PM, "Howard Sherer" <[hidden email]> wrote:

> A few years ago there was some discussion here about a very small 12 v
> 20A switching PSU with very low noise that was designed for radio use.
> I am now interested in one for use with my KX3 & KXPA. Can someone
> point me in the right direction.
>
> Howard AE3T
>
> ______________________________________________________________
> 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.htmlMessage delivered to
> [hidden email]
>

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delivered to [hidden email]

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Phil Wheeler-2

Re: very small 20A switching PS

In reply to this post by Howard Sherer

Over the years QST Product Reviews have tested
switching power supplies. If you're a member the
specific reviews can be found in the Product
Review archives, Howard. They include info on
noise spectrum -- one of the main features of
interest. I use an old Astron switcher with good
success with my K2/100 set-up. My K3/100 runs from
a much heavier Astron 35 amp transformer-type
supply -- just because I have it :-)

73, Phil W7OX

On 9/21/14, 3:50 AM, Howard Sherer wrote:
> A few years ago there was some discussion here
> about a very small 12 v 20A switching PSU with
> very low noise that was designed for radio use.
> I am now interested in one for use with my KX3 &
> KXPA. Can someone point me in the right direction.
>
> Howard AE3T

______________________________________________________________
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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Joe Subich, W4TV-4

Re: very small 20A switching PS

In reply to this post by Mike Furrey

It's a shame they can't put powerpoles on the *BACK* of those
supplies - particularly the back of the "metered" version.

73,

... Joe, W4TV

On 2014-09-21 10:48 AM, Mike Furrey wrote:

> Go with the powerwerx unit. I have, it is a very good, compact power supply.
> http://www.powerwerx.com/power-supplies/?gclid=CMD4tdLG8sACFc1i7AodNwMAqw
>
> 73, Mike WA5POK
>
>
> On Sunday, September 21, 2014 10:37 AM, Jeff Herr <[hidden email]> wrote:
>
>
>
> this one is smaller..... http://www.gammaresearch.net/hps-1a.html
>
> than this one...
> http://www.powerwerx.com/power-supplies/variable-digital-meters-30-amp-deskt
> op-power-supply.html
>
> but the power werx unit is electrically quiet, costs less, has accurate I &
> E meters, and is variable.
>
>
>
>
>
> -----Original Message-----
> From: Elecraft [mailto:[hidden email]] On Behalf Of Nick
> Garner
> Sent: Sunday, September 21, 2014 03:59 AM
> To: [hidden email]
> Cc: Elecraft Reflector
> Subject: Re: [Elecraft] very small 20A switching PS
>
> I have used the Gamma Research HPS-1a for several years and love it. It fits
> easily in my K3 pelican case. . Output is 22A at 25 percent duty.
>
> http://www.gammaresearch.net/hps-1a.html
>
> Nick
> N3WG
> On Sep 21, 2014 7:51 PM, "Howard Sherer" <[hidden email]> wrote:
>
>> A few years ago there was some discussion here about a very small 12 v
>> 20A switching PSU with very low noise that was designed for radio use.
>> I am now interested in one for use with my KX3 & KXPA. Can someone
>> point me in the right direction.
>>
>> Howard AE3T
>>
>> ______________________________________________________________
>> 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.htmlMessage delivered to
>> [hidden email]
>>
> ______________________________________________________________
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>
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> Please help support this email list: http://www.qsl.net/donate.htmlMessage
> delivered to [hidden email]
>
>
> ______________________________________________________________
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Ignacy

Re: very small 20A switching PS

HPS1-A required reducing power in my K3 to about 60W. It works well with IC-7000 because this rig folds power with lower voltage. For me, HPS advantages are light weight and automatic 110/220C switching.

It failed once under light service.

Ignacy, NO9E

Lewis Phelps

Re: very small 20A switching PS

In the “small power supply” department, I recently grabbed a surplus unit on sale at all electronics.com. It measures a scant 1.5 x 3 x 12 (if you remove a handle) and puts out 45 amps at 12VDC plus 3.1 amps at 3.3 VDC.

And the cost is only $24. Downside: probably produces too much RF noise to be useful. I haven’t had a chance to test it yet, but it’s rated as ENC 55022 Class A, which basically means it’s not rated for residential use. whether it will work OK in a ham radio application remains to be seen. I’ll report more when I know. It’s designed to run rack mounted equipment.
It also requires some ingenuity in connecting its output to the station, since it uses an output connector that is …ummm… unusual in the ham radio environment.

But if it works, it offers great bang for the buck.

see:

http://www.allelectronics.com/make-a-store/item/ps-2545/12-vdc-45a-3.3-vdc-3a-power-supply/1.html

Lew N6LEW

On Sep 22, 2014, at 4:27 AM, Ignacy <[hidden email]> wrote:

> HPS1-A required reducing power in my K3 to about 60W. It works well with
> IC-7000 because this rig folds power with lower voltage. For me, HPS
> advantages are light weight and automatic 110/220C switching.
>
> It failed once under light service.
>
> Ignacy, NO9E
>
>
>
> --
> View this message in context: http://elecraft.365791.n2.nabble.com/very-small-20A-switching-PS-tp7593251p7593292.html
> Sent from the Elecraft mailing list archive at Nabble.com.
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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> Message delivered to [hidden email]
>

Johnny Siu

very small 20A switching PS

Hello Lewis,

Please keep the group infomed about your findings. PSU at this package is usually much cheaper. However, the problem is always the RFI especially below 40m.

Tune the rig to the 40, 80 and 160m, you will notice noise from the PSU if there is RFI. Switching power supply itself is not an evil but well shielded and designed unit without RFI (or at least not noticeable) could be a bit costy.

73

Johnny VR2XMC

________________________________
寄件人︰ Lewis Phelps <[hidden email]>
收件人︰ "[hidden email] List" <[hidden email]>
傳送日期︰ 2014年09月25日 (週四) 8:01 AM
主題︰ Re: [Elecraft] very small 20A switching PS

In the “small power supply” department, I recently grabbed a surplus unit on sale at all electronics.com. It measures a scant 1.5 x 3 x 12 (if you remove a handle) and puts out 45 amps at 12VDC plus 3.1 amps at 3.3 VDC.

And the cost is only $24. Downside: probably produces too much RF noise to be useful. I haven’t had a chance to test it yet, but it’s rated as ENC 55022 Class A, which basically means it’s not rated for residential use. whether it will work OK in a ham radio application remains to be seen. I’ll report more when I know. It’s designed to run rack mounted equipment.
It also requires some ingenuity in connecting its output to the station, since it uses an output connector that is …ummm… unusual in the ham radio environment.

But if it works, it offers great bang for the buck.

see:

http://www.allelectronics.com/make-a-store/item/ps-2545/12-vdc-45a-3.3-vdc-3a-power-supply/1.html

Lew N6LEW

On Sep 22, 2014, at 4:27 AM, Ignacy <[hidden email]> wrote:

> HPS1-A required reducing power in my K3 to about 60W. It works well with
> IC-7000 because this rig folds power with lower voltage. For me, HPS
> advantages are light weight and automatic 110/220C switching.
>
> It failed once under light service.
>
> Ignacy, NO9E
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