KX1 build with 8030 mod
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GM DE VE7TTJ
I have purchased a KX1 kit along with the 8030 board and ATU kit. I want to do initial assembly incorporating the 8030 board (why put things in just to take them out?) I have built five other single-band rigs over the years so it's not a skill-testing question, just wondering if there are any gremlins I can't spot in blending the two sets of instructions. The ATU appears to be just a matter of pulling jumpers out of the female sockets to make way for the pins. It's the business of not installing L1 and L2 off the top and various Cap changes that makes me ask if it's better to make friends with desoldering wick instead. Comments? TU 73 VE7TTJ _______________________________________________ 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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Hi David,
I buildt the KX1, tuner and the 30/80m module all at the same time without doing it in stages. I had absolutely no problems and everything works like a charm. I can't think of any particular things to watch out for. But is is TIGHT!!! Pay a lot of attention to getting the leads as short as possible plus bending components down flat as required. Best of luck, Are - LB3SA ex VE3TSZ & VA3ARE
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In reply to this post by David Dolsen
Yes, it can be done - I do that all the time, but then I have done many
many of these kits and know where to look when something goes wrong. Unfortunately, you likely do not have that background with the KX1. If you attempt to do everything together, there is no opportunity to give it the interim tests. The most 'tricky' part of the KXB3080 is the low pass filter, and that is where most builders run into problems (other than the tinning of T2's leads). For that reason I strongly recommend that you do *not* install the LPF for the KXB3080 until after you have tested it with the rest of the KXB3080 parts installed. Yes, you will have to wind and install L1 and L2 as instructed in the KX1 basic manual. One way you could proceed which does allow interim testing is as follows: 1) Build the KX1 through Assembly Part II the per the manual except that you would not install L7. C1, C27 nor C26, and L6 would be installed on the bottom of the board. 2) Install C1 and C26 from the KXB3080 option, then wind and install T2 per the KXB3080 manual. 3) The KX1 can now be aligned and tested for receive on 20 and 40 meters. Complete Alignment and Test part II. 4) Build the transmit portion of the KX1 using the KX1 manual Assembly Part III. 5) Test the KX1 transmit on 20 and 40 per the manual Alignment and test part III. Your KX1 has now been tested for both transmit and receive on 20 and 40 meters. 6) Start in the KXB3080 manual at page 8 (Part II) and complete the rest of the steps in that manual. This will test your KX1 on all 4 bands. 7) Go back to the KX1 manual and complete the final assembly. One extra note: The positioning of the KXB3080 LPF requires clearance for the tuner components. It is a good idea to build and install the tuner between steps 5 and 6 above. If you have great faith in your construction and troubleshooting ability, then feel free to just dive in and 'do it', but I would not suggest that unless you have already done one or two of these. 73, Don W3FPR David Dolsen wrote: > GM DE VE7TTJ > > I have purchased a KX1 kit along with the 8030 board and ATU kit. I > want to do initial assembly incorporating the 8030 board (why put > things in just to take them out?) I have built five other single-band > rigs over the years so it's not a skill-testing question, just > wondering if there are any gremlins I can't spot in blending the two > sets of instructions. The ATU appears to be just a matter of pulling > jumpers out of the female sockets to make way for the pins. It's the > business of not installing L1 and L2 off the top and various Cap > changes that makes me ask if it's better to make friends with > desoldering wick instead. Comments? > > 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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I forgot one item in my list. Please add the following:
2a) Do the first 3 steps from page 5 of the KXB3080 manual (cut the PC trace and add the wire). Sorry - I have added it to the list below for anyone who wants a complete set of steps. 73, Don W3FPR Don Wilhelm wrote: > Yes, it can be done - I do that all the time, but then I have done > many many of these kits and know where to look when something goes > wrong. Unfortunately, you likely do not have that background with the > KX1. > > If you attempt to do everything together, there is no opportunity to > give it the interim tests. > > The most 'tricky' part of the KXB3080 is the low pass filter, and that > is where most builders run into problems (other than the tinning of > T2's leads). For that reason I strongly recommend that you do *not* > install the LPF for the KXB3080 until after you have tested it with > the rest of the KXB3080 parts installed. Yes, you will have to wind > and install L1 and L2 as instructed in the KX1 basic manual. > > One way you could proceed which does allow interim testing is as follows: > 1) Build the KX1 through Assembly Part II the per the manual except > that you would not install L7. C1, C27 nor C26, and L6 would be > installed on the bottom of the board. > 2) Install C1 and C26 from the KXB3080 option, then wind and install > T2 per the KXB3080 manual. trace and add the wire). > > 3) The KX1 can now be aligned and tested for receive on 20 and 40 > meters. Complete Alignment and Test part II. > 4) Build the transmit portion of the KX1 using the KX1 manual Assembly > Part III. > 5) Test the KX1 transmit on 20 and 40 per the manual Alignment and > test part III. Your KX1 has now been tested for both transmit and > receive on 20 and 40 meters. > 6) Start in the KXB3080 manual at page 8 (Part II) and complete the > rest of the steps in that manual. This will test your KX1 on all 4 > bands. > 7) Go back to the KX1 manual and complete the final assembly. > > One extra note: The positioning of the KXB3080 LPF requires clearance > for the tuner components. It is a good idea to build and install the > tuner between steps 5 and 6 above. > > If you have great faith in your construction and troubleshooting > ability, then feel free to just dive in and 'do it', but I would not > suggest that unless you have already done one or two of these. > > 73, > Don W3FPR > > > David Dolsen wrote: >> GM DE VE7TTJ >> >> I have purchased a KX1 kit along with the 8030 board and ATU kit. I >> want to do initial assembly incorporating the 8030 board (why put >> things in just to take them out?) I have built five other single-band >> rigs over the years so it's not a skill-testing question, just >> wondering if there are any gremlins I can't spot in blending the two >> sets of instructions. The ATU appears to be just a matter of pulling >> jumpers out of the female sockets to make way for the pins. It's the >> business of not installing L1 and L2 off the top and various Cap >> changes that makes me ask if it's better to make friends with >> desoldering wick instead. Comments? >> >> 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 > ------------------------------------------------------------------------ > > > No virus found in this incoming message. > Checked by AVG. > Version: 8.0.100 / Virus Database: 269.23.16/1448 - Release Date: 5/16/2008 7:42 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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