RF choke question
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Hey again guys,
I'm at the stage where I need to put the little tiny RF choke on the bottom side of the RF board. The manual calls for RFC15, which is supposedly tiny, and BROWN-BLACK-BROWN. The only one I have that's brown-black-brown is a larger one. The little tiny one I have is GREEN-BROWN-GREEN. Which one is right? :) And, for RFC 1, 2, 12 and 13, they're supposed to be Green chokes, but I seem to have 3 greens and one tan colored chokes for this band combo. Could that be possible? Thanks again, jeff _______________________________________________ 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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Ok, sorry again. I think I figured it out.
The "mini" choke I thought was a choke is really R116, a 5.1Mohm 1/8w resistor. This means that I have one missing green body choke. My question though still remains regarding RFC 1,2, 12 and 13 - I have tan ones, the book calls for green. Is there any difference? Thanks. Jeff On Sun, Jan 14, 2007 at 10:24:41PM -0500, Jeff Kinzli wrote: > Hey again guys, > > I'm at the stage where I need to put the little tiny RF choke on the bottom side of the RF board. > > The manual calls for RFC15, which is supposedly tiny, and BROWN-BLACK-BROWN. The only one I have that's brown-black-brown is a larger one. The little tiny one I have is GREEN-BROWN-GREEN. > > Which one is right? :) > > And, for RFC 1, 2, 12 and 13, they're supposed to be Green chokes, but I seem to have 3 greens and one tan colored chokes for this band combo. Could that be possible? > > Thanks again, > > jeff 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 Jeff Kinzli
Jeff,
The body color of inductors, resistors, capacitors will vary from time to time depending on the manufacturer's whims, and therefore is not a good point of reference for any component identification. The color bands are the only thing that are important. It is unfrotunate that the K2 manual does indicate the body color for the RF chokes - that was only valid at the time the manual was created. The smallest RF choke with color bands brown-black-brown should be used for RFC15. You may be confused by the body color on the other RF chokes, none are colored Green-Brown-Green which would indicate an inductance of 5,100,000 uH or 5.1 Hy which would be a very large choke (it could be 15 uH Brown-Green-Black, but I cannot be certain on that). Refer to the K2 parts list for the various chokes that are provided with the kit, and if that is not sufficient clarification, the ARRL Handbook Components Data chapter has good information on component color coding and identification. 73, Don W3FPR > -----Original Message----- > > I'm at the stage where I need to put the little tiny RF choke on > the bottom side of the RF board. > > The manual calls for RFC15, which is supposedly tiny, and > BROWN-BLACK-BROWN. The only one I have that's brown-black-brown > is a larger one. The little tiny one I have is GREEN-BROWN-GREEN. > > Which one is right? :) > > And, for RFC 1, 2, 12 and 13, they're supposed to be Green > chokes, but I seem to have 3 greens and one tan colored chokes > for this band combo. Could that be possible? > > No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.432 / Virus Database: 268.16.10/625 - Release Date: 1/13/2007 5:40 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 |
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Jeff, in addition, I would suggest that you have mistakenly used the small
RF choke RFC15, as a resistor or choke in the earlier stages of construction at some other location. Also, what you have left is R116 a 5.1 meg resistor which I believe is the resistor that is across the BFO coil. What is across your L33 coil ? If nothing else, Elecraft and Christine are almost perfect when it comes to parts packing and insuring that each kit has every part. /joe -----Original Message----- From: [hidden email] [mailto:[hidden email]] On Behalf Of Don Wilhelm Sent: Sunday, January 14, 2007 9:59 PM To: Jeff Kinzli; [hidden email] Subject: RE: [Elecraft] RF choke question Jeff, The body color of inductors, resistors, capacitors will vary from time to time depending on the manufacturer's whims, and therefore is not a good point of reference for any component identification. The color bands are the only thing that are important. It is unfrotunate that the K2 manual does indicate the body color for the RF chokes - that was only valid at the time the manual was created. The smallest RF choke with color bands brown-black-brown should be used for RFC15. You may be confused by the body color on the other RF chokes, none are colored Green-Brown-Green which would indicate an inductance of 5,100,000 uH or 5.1 Hy which would be a very large choke (it could be 15 uH Brown-Green-Black, but I cannot be certain on that). Refer to the K2 parts list for the various chokes that are provided with the kit, and if that is not sufficient clarification, the ARRL Handbook Components Data chapter has good information on component color coding and identification. 73, Don W3FPR > -----Original Message----- > > I'm at the stage where I need to put the little tiny RF choke on the > bottom side of the RF board. > > The manual calls for RFC15, which is supposedly tiny, and > BROWN-BLACK-BROWN. The only one I have that's brown-black-brown is a > larger one. The little tiny one I have is GREEN-BROWN-GREEN. > > Which one is right? :) > > And, for RFC 1, 2, 12 and 13, they're supposed to be Green chokes, but > I seem to have 3 greens and one tan colored chokes for this band > combo. Could that be possible? > > No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.432 / Virus Database: 268.16.10/625 - Release Date: 1/13/2007 5:40 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 _______________________________________________ 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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