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.
2a) Do the first 3 steps from page 5 of the KXB3080 manual (cut the PC
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
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