KX1 Question

[Curron HILL]

Have all the bugs (if there were any) been worked out of the Kx1 80-20 meter
radio upgrades.  I was thinking of building another Kx1, this one with 80
meters, but wondered if add the testing had been completed.

Did anyone use a 80/40/30/20 for field day?  How did it work?

What is the output on each band with 13.8vdc input?

73
Don KB3DRW


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[Don Wilhelm-3]

Don,

All known bugs have been worked out with the KXB3080.  Just do not ignore
the errata sheet that instructs you to change L3 to 18 turns, and install
the 2 resistors for the power mod.

Power output with a 13.8 or 14 volt supply is typically 4 watts or more on
80, 40 and 30, and 20 meters usually comes in at about 3.5 watts.  This has
been consistent over the 14 that I have dealt with so far.

73,
Don W3FPR

> -----Original Message-----
>
> Have all the bugs (if there were any) been worked out of the Kx1
> 80-20 meter
> radio upgrades.  I was thinking of building another Kx1, this one with 80
> meters, but wondered if add the testing had been completed.
>
> Did anyone use a 80/40/30/20 for field day?  How did it work?
>
> What is the output on each band with 13.8vdc input?
>
> 73
> Don KB3DRW
>

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[Ron D'Eau Claire-2]

Don KB3DRW asked:

Have all the bugs (if there were any) been worked out of the Kx1 80-20 meter

radio upgrades.  I was thinking of building another Kx1, this one with 80
meters, but wondered if add the testing had been completed.

Did anyone use a 80/40/30/20 for field day?  How did it work?

What is the output on each band with 13.8vdc input?

-----------------------------------------------

Hi, Don:

There have been no issues regarding the KXB3080 for some time now. There
were a couple of issues that became clear only after the test group had
wrung out their units and a much larger number of people started building
the kits. Those were quickly corrected in typical Elecraft manner.

To answer your output power question, the specification is 3 to 4 watts at
12 VDC. With a 13.8 VDC supply, my KX1 w/ KXB3080 delivers:

80 Meters: 3.8 Watts
40 Meters: 3.3 Watts
30 Meters: 4.2 Watts
20 Meters: 3.6 Watts

So that's a range of just 1 dB from the highest band output (30 meters) to
the lowest band output (40 meters).

I was working Saturday and Sunday. Field Day is one contest I try to
participate in, even if in a small way, but not for me and my Elecraft gear
this year, sigh!

Ron AC7AC

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