Rf chokes 6,7,8 too large? kpa100
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Wife got me the kpa100 for my k2 this Christmas. Started to put it together and found the rfc 6,7,and 8 seem to be the small size rather than the miniature the holes are spaced for. Will it hurt to install them in a slightly vertical orientation or did I get the wrong ones in the kit? I am positive I have correctly identified the chokes and all the others fit like they are supposed to. Kevin
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Re: Rf chokes 6,7,8 too large? kpa100
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I just got the KX1 for Christmas from my XYL and found that L9 was supposed to be a micro sized 100 uH device. The one I have is a mini size, not micro. The board layout was for the micro as well. I contacted Elecraft and they told me that the micro size is no longer available so that is the part to use. They also forwarded a link for how to install the inductor:
http://www.elecraft.com/Apps/Builder_Alert_Installing_Small_Chokes.htm I'm not sure if this applies to your KPA100, though, but thought I would share some possibility of the same issue. Mark, NK8Q K2 4786 KX1 1644 (some assembly required, HI HI!) >Wife got me the kpa100 for my k2 this Christmas. Started to put it together and found the rfc 6,7,and 8 seem to be the small size rather than the miniature the holes are spaced for. Will it hurt to install them in a slightly vertical orientation or did I get the wrong ones in the kit? I am positive I have correctly identified the chokes and all the others fit like they are supposed to. Kevin _______________________________________________ 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: Rf chokes 6,7,8 too large? kpa100
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In reply to this post by Kevin
There are instructions for handling those chokes on the Elecaft web site at:
http://www.elecraft.com/Apps/Builder_Alert_Installing_Small_Chokes.htm Ron AC7AC -----Original Message----- Wife got me the kpa100 for my k2 this Christmas. Started to put it together and found the rfc 6,7,and 8 seem to be the small size rather than the miniature the holes are spaced for. Will it hurt to install them in a slightly vertical orientation or did I get the wrong ones in the kit? I am positive I have correctly identified the chokes and all the others fit like they are supposed to. Kevin _______________________________________________ _______________________________________________ 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 |
NEED TO VISIT THIS LINK (was: Rf chokes too large?)
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EVERYONE WHO BUILDS A NEW ELECRAFT KIT SHOULD READ THIS APPLICATION NOTE!!!
It deals with the fact that Elecraft appears to have bitten the bullet and substituted heavier-duty (and slightly larger) RFCs for many of the sub-mini RFCs used in their kits. The end product will be fewer damaged RFCs and happier builders. BUT you do NEED to know how to handle/install the newer RFCs since they might not fit directly into the available holes... here's how. >http://www.elecraft.com/Apps/Builder_Alert_Installing_Small_Chokes.htm Thanks to Elecraft for this app note! 73, Tom N0SS _______________________________________________ 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: Rf chokes 6,7,8 too large? kpa100
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In reply to this post by Kevin
Kevin,
Look at the Builder's resource page and Application Notes section on the Elecraft website www.elecraft.com for a diagram of how to handle parts that are larger than the holes as well as a lot of good information about soldering and other subjects. The leads should be formed under the part a bit and then run downward if the part is to fit parallel with the board, but other than 'neatness' there is no problem if the chokes are tilted a bit either (at least no problem at the HF frequencies, VHF/UHF may have other considerations). 73, Don W3FPR > -----Original Message----- > > Wife got me the kpa100 for my k2 this Christmas. Started to put > it together and found the rfc 6,7,and 8 seem to be the small size > rather than the miniature the holes are spaced for. Will it hurt > to install them in a slightly vertical orientation or did I get > the wrong ones in the kit? I am positive I have correctly > identified the chokes and all the others fit like they are > supposed to. Kevin > No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.432 / Virus Database: 268.16.8/621 - Release Date: 1/9/2007 1:37 PM _______________________________________________ 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: NEED TO VISIT THIS LINK (was: Rf chokes too large?)
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In reply to this post by Tom Hammond-3
Tom,
Can you elaborate on the reason for the change? Is it a construction thing or an operational improvement. In other words, if my K2 is happy should I be concerned about replacing the RFC's already installed? thanks Tom WB2QDG k2 1103 ----- Original Message ----- From: "Tom Hammond" <[hidden email]> To: <[hidden email]> Sent: Tuesday, January 09, 2007 1:11 PM Subject: [Elecraft] NEED TO VISIT THIS LINK (was: Rf chokes too large?) > EVERYONE WHO BUILDS A NEW ELECRAFT KIT SHOULD READ THIS APPLICATION > NOTE!!! > > It deals with the fact that Elecraft appears to have bitten the bullet and > substituted heavier-duty (and slightly larger) RFCs for many of the > sub-mini RFCs used in their kits. The end product will be fewer damaged > RFCs and happier builders. BUT you do NEED to know how to handle/install > the newer RFCs since they might not fit directly into the available > holes... here's how. > >>http://www.elecraft.com/Apps/Builder_Alert_Installing_Small_Chokes.htm > > Thanks to Elecraft for this app note! > > 73, > > Tom N0SS > > > _______________________________________________ > 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: NEED TO VISIT THIS LINK
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The reason given to me a couple of days ago by Elecraft (for L9 in my
KX1, I assume similar applies) was because the "micro" part is no longer available so the "mini" part has been substituted. Mark, NK8Q Tom McCulloch wrote: > Tom, > Can you elaborate on the reason for the change? Is it a construction > thing or an operational improvement. In other words, if my K2 is > happy should I be concerned about replacing the RFC's already installed? > > thanks > Tom > WB2QDG > k2 1103 > ----- Original Message ----- From: "Tom Hammond" <[hidden email]> > To: <[hidden email]> > Sent: Tuesday, January 09, 2007 1:11 PM > Subject: [Elecraft] NEED TO VISIT THIS LINK (was: Rf chokes too large?) > > >> EVERYONE WHO BUILDS A NEW ELECRAFT KIT SHOULD READ THIS APPLICATION >> NOTE!!! >> >> It deals with the fact that Elecraft appears to have bitten the >> bullet and substituted heavier-duty (and slightly larger) RFCs for >> many of the sub-mini RFCs used in their kits. The end product will be >> fewer damaged RFCs and happier builders. BUT you do NEED to know how >> to handle/install the newer RFCs since they might not fit directly >> into the available holes... here's how. >> >>> http://www.elecraft.com/Apps/Builder_Alert_Installing_Small_Chokes.htm >> >> Thanks to Elecraft for this app note! >> >> 73, >> >> Tom N0SS >> _______________________________________________ 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: NEED TO VISIT THIS LINK (was: Rf chokes too large?)
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In reply to this post by Tom McCulloch
No. Do not change any installed RFC's.
As the note explains, it's quite possible to break the connections inside the inductor by bending the leads too tightly at right angles to the main body, especially on the smaller sub-miniature units. One wants to be careful about bending the leads on the inductors as the alert explains. But, if you have a broken inductor, you unit will not pass the performance tests (as several builders discovered). Also, as Elecraft changes to lead-free RoHS-compliant parts they are finding that some of the sub-miniature inductors do not have RoHS equivalents and a slightly larger unit must be used. These parts can be used quite easily, but they require the leads be reformed in a slightly different manner. The alert explains how to do that. Ron AC7AC -----Original Message----- From: [hidden email] [mailto:[hidden email]] On Behalf Of Tom McCulloch Sent: Tuesday, January 09, 2007 6:33 PM To: [hidden email]; Tom Hammond Subject: Re: [Elecraft] NEED TO VISIT THIS LINK (was: Rf chokes too large?) Tom, Can you elaborate on the reason for the change? Is it a construction thing or an operational improvement. In other words, if my K2 is happy should I be concerned about replacing the RFC's already installed? thanks Tom WB2QDG k2 1103 ----- Original Message ----- From: "Tom Hammond" <[hidden email]> To: <[hidden email]> Sent: Tuesday, January 09, 2007 1:11 PM Subject: [Elecraft] NEED TO VISIT THIS LINK (was: Rf chokes too large?) > EVERYONE WHO BUILDS A NEW ELECRAFT KIT SHOULD READ THIS APPLICATION > NOTE!!! > > It deals with the fact that Elecraft appears to have bitten the bullet > and > substituted heavier-duty (and slightly larger) RFCs for many of the > sub-mini RFCs used in their kits. The end product will be fewer damaged > RFCs and happier builders. BUT you do NEED to know how to handle/install > the newer RFCs since they might not fit directly into the available > holes... here's how. > >>http://www.elecraft.com/Apps/Builder_Alert_Installing_Small_Chokes.htm > > Thanks to Elecraft for this app note! > > 73, > > Tom N0SS > > > _______________________________________________ > 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 |
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