potentially interesting (sorry, bad pun)
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potentially interesting (sorry, bad pun)
 
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I've never seen one before, but I am curious ...
http://www.gigaparts.com/parts/profile.php?sku=zgr-hsp-1a No relationship with the vendor or manufacturer, YMMV, etc. ... if someone out there has one, please tell what you think. This would be *awfully* handy for portable use. Steve KZ1X/4 K2 #0771, fully loaded and always on __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
RE: potentially interesting (sorry, bad pun)
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Steve KZ1X/4 wrote:
I've never seen one before, but I am curious ... http://www.gigaparts.com/parts/profile.php?sku=zgr-hsp-1a ----------------------- Never heard of a power supply rated at "22 Amps @ .25 duty/sec." ".25 duty/sec"?? Is that 22 amps for 1/4 of a second? The normal ratings used by the industry for power supplies are "CCS" or "ICS". CCS stands for Continuous Commercial Service. ICS stands for Intermittent Commercial Service. For many years that was ICAS for Intermittent Commercial and Amateur Service, but it's being replaced by ICS (I guess we Hams don't rate the special recognition any longer <G>). I don't have a formal definition of ICAS or ICS on hand but if I recall correctly it's typically 1.5 times the CCS rating for a device. For SSB/CW operation, our rigs need a power supply rated at the peak current, ICAS. These are long-standing industry-wide definitions by which power supplies, among other things, are specified so one knows how one unit compares with others and if it meets our needs. I'd strongly question why some manufacturer seems to be carefully avoiding using the industry-standard means of specifying the unit. It's sort of like seeing a transmitter rated in "pseudo-ergs" of output power. Hmmm... Not watts.... "What's a pseudo-erg?" "Oh, it's a lot. All you need!" Hmmmmmmmmm... Maybe there's a good explanation, but I'd want to see it before buying. Ron AC7AC _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
RE: potentially interesting (sorry, bad pun)
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In reply to this post by Steve Jackson-5
Steve,
It looks like 'specsmanship' to me - I looked hard at the 5 amps continuous rating and then looked at the high current duty cycle specified and concluded that it will not support a continuous string of dots no matter how you slice it. Duty cycle/sec is a unit of measure that I have never heard of and does not make any sense to me - duty cycle is a ratio, and seconds is time - what do you call a ratio divided by time? I guess it could be related to frequency (= 1/t) - a ratio is unitless - as I said, it doesn't make any sense to me. It may be a 5 amp supply with a BIG capacitor. For the price, there are other switchers out there in the same price range that will provide 20 amps ICS with no problem. 73, Don W3FPR > -----Original Message----- > > I've never seen one before, but I am curious ... > > http://www.gigaparts.com/parts/profile.php?sku=zgr-hsp-1a > > No relationship with the vendor or manufacturer, YMMV, > etc. > > ... if someone out there has one, please tell what you > think. This would be *awfully* handy for portable > use. > > Steve KZ1X/4 > K2 #0771, fully loaded and always on > > _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
Re: potentially interesting (sorry, bad pun)
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Don is right. This is a low duty cycle power supply. For just a few
dollars more ($149), you can find brand a new Astron RS-35A which is rated at 35 amps ICS. They _will_ take a key down for a long time without problems. Astron also has a slightly smaller supply (RS-20A, 20 amps) that sells new for about $95 which will also do the job quite well. It just doesn't make sense to trust your trusty K2 to a supply with questionable specs... On Mar 22, 2006, at 4:58 PM, Don Wilhelm wrote: > Steve, > > It looks like 'specsmanship' to me - I looked hard at the 5 amps > continuous > rating and then looked at the high current duty cycle specified and > concluded that it will not support a continuous string of dots no > matter how > you slice it. Duty cycle/sec is a unit of measure that I have > never heard > of and does not make any sense to me - duty cycle is a ratio, and > seconds is > time - what do you call a ratio divided by time? I guess it could be > related to frequency (= 1/t) - a ratio is unitless - as I said, it > doesn't > make any sense to me. > > It may be a 5 amp supply with a BIG capacitor. > > For the price, there are other switchers out there in the same > price range > that will provide 20 amps ICS with no problem. > > 73, > Don W3FPR > >> -----Original Message----- >> >> I've never seen one before, but I am curious ... >> >> http://www.gigaparts.com/parts/profile.php?sku=zgr-hsp-1a >> >> No relationship with the vendor or manufacturer, YMMV, >> etc. >> >> ... if someone out there has one, please tell what you >> think. This would be *awfully* handy for portable >> use. >> >> Steve KZ1X/4 >> K2 #0771, fully loaded and always on >> >> > > _______________________________________________ > Elecraft mailing list > Post to: [hidden email] > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com -Jack Brindle, W6FB ======================================================================= _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
Re: potentially interesting (sorry, bad pun)
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In reply to this post by Steve Jackson-5
The little MFJ switcher is not much bigger, has more current capacity
and is cheaper. I have used a couple of them and they seem to be quiet. No connection to MFJ...etc K4TO Steve Jackson wrote: > I've never seen one before, but I am curious ... > > http://www.gigaparts.com/parts/profile.php?sku=zgr-hsp-1a > > No relationship with the vendor or manufacturer, YMMV, > etc. > > ... if someone out there has one, please tell what you > think. This would be *awfully* handy for portable > use. > > Steve KZ1X/4 > K2 #0771, fully loaded and always on > > __________________________________________________ > Do You Yahoo!? > Tired of spam? Yahoo! Mail has the best spam protection around > http://mail.yahoo.com > _______________________________________________ > Elecraft mailing list > Post to: [hidden email] > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com > > Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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In reply to this post by Steve Jackson-5
Steve,
This supply was recently discussed on HFPack. According to a review by Phil, AD5X, the Gamma Research HPS-1a supply contains a string of 25F caps in the output to supply the peak current demand. Look here: http://www.gammaresearch.net/ And the review here: http://home.comcast.net/~ad5x/presentations.htm According to AD5X's tests with an IC706 at 100W, there are some potential issues, which depend on CW speed, mode, and the specific radio current demands. These, of course, need to be balanced against the 1.25# weight and (almost) 3" x 5" size. The concept is interesting, however, and truly looks useful! Steve Aa8af > -----Original Message----- > From: > elecraft-bounces+shlawrence=[hidden email] > [mailto:elecraft-bounces+shlawrence=[hidden email]. > net] On Behalf Of Steve Jackson > Sent: Wednesday, March 22, 2006 6:47 PM > To: [hidden email] > Subject: [Elecraft] potentially interesting (sorry, bad pun) > > I've never seen one before, but I am curious ... > > http://www.gigaparts.com/parts/profile.php?sku=zgr-hsp-1a > > No relationship with the vendor or manufacturer, YMMV, etc. > > ... if someone out there has one, please tell what you think. > This would be *awfully* handy for portable use. > > Steve KZ1X/4 > K2 #0771, fully loaded and always on > > __________________________________________________ > Do You Yahoo!? > Tired of spam? Yahoo! Mail has the best spam protection > around http://mail.yahoo.com > _______________________________________________ > Elecraft mailing list > Post to: [hidden email] > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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In reply to this post by Steve Jackson-5
No, I wrote correctly. 25 FARADS. But, this is SMALL in comparison. Elna offers 600F @ 2.5V. About 5" long x 1.5" diameter! YES, 600 Farads. I kid you not. I did a double-take on this one. Really! See: http://www.elna.co.jp/en/ct/pdf/DPe.pdf 73, Steve aa8af > -----Original Message----- > From: Phil Kane [mailto:[hidden email]] > Sent: Thursday, March 23, 2006 11:19 PM > To: Steve > Subject: RE: [Elecraft] potentially interesting (sorry, bad pun) > > Do you mean 25 uF? A 25 Farad capacitor would be about the size of > a beer barrel!!! _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
RE: potentially interesting (sorry, bad pun)
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In reply to this post by Steve Jackson-5
In one of my trade magazines I recently read of a 3000 F capacitor. Yes, kiloFarads. Interesting things are happening in the super capacitor field.
Kevin. KD5ONS -----Original Message----- >From: Steve <[hidden email]> >Sent: Mar 24, 2006 5:19 PM >To: 'Phil Kane' <[hidden email]> >Cc: [hidden email] >Subject: RE: [Elecraft] potentially interesting (sorry, bad pun) > > >No, I wrote correctly. 25 FARADS. > >But, this is SMALL in comparison. Elna offers 600F @ 2.5V. About 5" long x >1.5" diameter! > >YES, 600 Farads. I kid you not. I did a double-take on this one. Really! > > >See: http://www.elna.co.jp/en/ct/pdf/DPe.pdf > >73, >Steve >aa8af > > >> -----Original Message----- >> From: Phil Kane [mailto:[hidden email]] >> Sent: Thursday, March 23, 2006 11:19 PM >> To: Steve >> Subject: RE: [Elecraft] potentially interesting (sorry, bad pun) >> >> Do you mean 25 uF? A 25 Farad capacitor would be about the size of >> a beer barrel!!! > >_______________________________________________ >Elecraft mailing list >Post to: [hidden email] >You must be a subscriber to post to the list. >Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > >Help: http://mailman.qth.net/subscribers.htm >Elecraft web page: http://www.elecraft.com _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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In reply to this post by Steve-292
Steve wrote:
> No, I wrote correctly. 25 FARADS. > > But, this is SMALL in comparison. Elna offers 600F @ 2.5V. About 5" long x > 1.5" diameter! > > YES, 600 Farads. I kid you not. I did a double-take on this one. Really! > > See: http://www.elna.co.jp/en/ct/pdf/DPe.pdf Hmmm ... I wonder what the inductance of the 600F cap is? If it's really low, and you could short the terminals with a screwdriver at 10 milliohms, that would be a pulse of a couple hundred amps, and likely a large electrical display. Conversely, if it is discharged, you probably wouldn't want to connect it directly across a 2.5V power supply. I believe capacitors like this are used in the hot rods that boom down the road with multi-hundred watt amplifiers. I'll ask our oldest grandson ... such electronics take up the whole trunk of his car. Fred K6DGW Auburn CA CM98lw _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
Re: potentially interesting (sorry, bad pun)
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In reply to this post by Kevin Rock
But not as bad as this one.
That 3KF cap sounds expensive. To buy one, I'd guess you have to charge it... ;-) :-) :-) On Mar 24, 2006, at 3:45 PM, Kevin Rock wrote: > In one of my trade magazines I recently read of a 3000 F > capacitor. Yes, kiloFarads. Interesting things are happening in > the super capacitor field. > Kevin. KD5ONS > > -----Original Message----- >> From: Steve <[hidden email]> >> Sent: Mar 24, 2006 5:19 PM >> To: 'Phil Kane' <[hidden email]> >> Cc: [hidden email] >> Subject: RE: [Elecraft] potentially interesting (sorry, bad pun) >> >> >> No, I wrote correctly. 25 FARADS. >> >> But, this is SMALL in comparison. Elna offers 600F @ 2.5V. About >> 5" long x >> 1.5" diameter! >> >> YES, 600 Farads. I kid you not. I did a double-take on this >> one. Really! >> >> >> See: http://www.elna.co.jp/en/ct/pdf/DPe.pdf >> >> 73, >> Steve >> aa8af >> >> >>> -----Original Message----- >>> From: Phil Kane [mailto:[hidden email]] >>> Sent: Thursday, March 23, 2006 11:19 PM >>> To: Steve >>> Subject: RE: [Elecraft] potentially interesting (sorry, bad pun) >>> >>> Do you mean 25 uF? A 25 Farad capacitor would be about the >>> size of >>> a beer barrel!!! >> >> _______________________________________________ >> Elecraft mailing list >> Post to: [hidden email] >> You must be a subscriber to post to the list. >> Subscriber Info (Addr. Change, sub, unsub etc.): >> http://mailman.qth.net/mailman/listinfo/elecraft >> >> Help: http://mailman.qth.net/subscribers.htm >> Elecraft web page: http://www.elecraft.com > > _______________________________________________ > Elecraft mailing list > Post to: [hidden email] > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com -Jack Brindle, W6FB ======================================================================= _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
Re: potentially interesting (sorry, bad pun)
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In reply to this post by Steve Jackson-5
But, much like the muzzle of a firearm, you do not want to be close when it discharges!
Kevin. KD5ONS -----Original Message----- >From: Jack Brindle <[hidden email]> >Sent: Mar 24, 2006 7:06 PM >To: Kevin Rock <[hidden email]> >Cc: [hidden email] >Subject: Re: [Elecraft] potentially interesting (sorry, bad pun) > >But not as bad as this one. > >That 3KF cap sounds expensive. To buy one, I'd guess you have to >charge it... > >;-) :-) :-) > > >On Mar 24, 2006, at 3:45 PM, Kevin Rock wrote: > >> In one of my trade magazines I recently read of a 3000 F >> capacitor. Yes, kiloFarads. Interesting things are happening in >> the super capacitor field. >> Kevin. KD5ONS >> >> -----Original Message----- >>> From: Steve <[hidden email]> >>> Sent: Mar 24, 2006 5:19 PM >>> To: 'Phil Kane' <[hidden email]> >>> Cc: [hidden email] >>> Subject: RE: [Elecraft] potentially interesting (sorry, bad pun) >>> >>> >>> No, I wrote correctly. 25 FARADS. >>> >>> But, this is SMALL in comparison. Elna offers 600F @ 2.5V. About >>> 5" long x >>> 1.5" diameter! >>> >>> YES, 600 Farads. I kid you not. I did a double-take on this >>> one. Really! >>> >>> >>> See: http://www.elna.co.jp/en/ct/pdf/DPe.pdf >>> >>> 73, >>> Steve >>> aa8af >>> >>> >>>> -----Original Message----- >>>> From: Phil Kane [mailto:[hidden email]] >>>> Sent: Thursday, March 23, 2006 11:19 PM >>>> To: Steve >>>> Subject: RE: [Elecraft] potentially interesting (sorry, bad pun) >>>> >>>> Do you mean 25 uF? A 25 Farad capacitor would be about the >>>> size of >>>> a beer barrel!!! >>> >>> _______________________________________________ >>> Elecraft mailing list >>> Post to: [hidden email] >>> You must be a subscriber to post to the list. >>> Subscriber Info (Addr. Change, sub, unsub etc.): >>> http://mailman.qth.net/mailman/listinfo/elecraft >>> >>> Help: http://mailman.qth.net/subscribers.htm >>> Elecraft web page: http://www.elecraft.com >> >> _______________________________________________ >> Elecraft mailing list >> Post to: [hidden email] >> You must be a subscriber to post to the list. >> Subscriber Info (Addr. Change, sub, unsub etc.): >> http://mailman.qth.net/mailman/listinfo/elecraft >> >> Help: http://mailman.qth.net/subscribers.htm >> Elecraft web page: http://www.elecraft.com > > >-Jack Brindle, W6FB >======================================================================= > > _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
Re: potentially interesting (sorry, bad pun)
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In reply to this post by Kevin Rock
I remember in my high school physics class (1955) the instructor (ex-
W7TSZ) told us that it might be possible to build a ONE farad capacitor, but it would be as big as the classroom. Times have really changed! 73, Bob, N7XY On Mar 24, 2006, at 3:45 PM, Kevin Rock wrote: > In one of my trade magazines I recently read of a 3000 F > capacitor. Yes, kiloFarads. Interesting things are happening in > the super capacitor field. > Kevin. KD5ONS > > -----Original Message----- >> From: Steve <[hidden email]> >> Sent: Mar 24, 2006 5:19 PM >> To: 'Phil Kane' <[hidden email]> >> Cc: [hidden email] >> Subject: RE: [Elecraft] potentially interesting (sorry, bad pun) >> >> >> No, I wrote correctly. 25 FARADS. >> >> But, this is SMALL in comparison. Elna offers 600F @ 2.5V. About >> 5" long x >> 1.5" diameter! >> >> YES, 600 Farads. I kid you not. I did a double-take on this >> one. Really! >> >> >> See: http://www.elna.co.jp/en/ct/pdf/DPe.pdf >> >> 73, >> Steve >> aa8af >> >> >>> -----Original Message----- >>> From: Phil Kane [mailto:[hidden email]] >>> Sent: Thursday, March 23, 2006 11:19 PM >>> To: Steve >>> Subject: RE: [Elecraft] potentially interesting (sorry, bad pun) >>> >>> Do you mean 25 uF? A 25 Farad capacitor would be about the >>> size of >>> a beer barrel!!! >> >> _______________________________________________ >> Elecraft mailing list >> Post to: [hidden email] >> You must be a subscriber to post to the list. >> Subscriber Info (Addr. Change, sub, unsub etc.): >> http://mailman.qth.net/mailman/listinfo/elecraft >> >> Help: http://mailman.qth.net/subscribers.htm >> Elecraft web page: http://www.elecraft.com > > _______________________________________________ > Elecraft mailing list > Post to: [hidden email] > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com > _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
Re: potentially interesting (sorry, bad pun)
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On Fri, 24 Mar 2006 17:58:53 -0800, Bob Nielsen wrote:
>I remember in my high school physics class (1955) the instructor (ex- >W7TSZ) told us that it might be possible to build a ONE farad >capacitor, but it would be as big as the classroom. Times have >really changed! The materials have changed but the laws of physics haven't. It depends on the voltage. Power line capacitors (used for power factor correction) are as big as power line tranformers in some cases. -- 73 de K2ASP - Phil Kane _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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