[Elecraft] Update on KX1 1804
K9ZTV
k9ztv at socket.net
Mon Jun 25 22:27:27 EDT 2007
Yup, do it. You won't regret it, nor will you blow the PA.
With internal Lithium batteries (the non-chargable kind), I ran 33 feet
of hook-up wire from a picnic table to a 30 foot push-up mast, and in
the middle of 20-meter Saturday afternoon FD bedlam worked Utah,
Colorado, Maine, Vermont, Texas, and Tennessee with 1.2 watts.
I would also recommend the little speakers recently talked about on the
reflector that you can get at Walgreen's in a blister pack -- two for
$10. They're the cat's meow. By the way, rumor has it that some guy
gobbled up a bunch of those blister packs from every Walgreen he passed
on his way to Dayton and then peddled them to the unsuspecting for $20 a
speaker. Makes a mother proud!
73,
Kent K9ZTV
Bernie Gardner wrote:
>Last week I reported a little problem in the power output of this radio. I
>took Don's advice and checked all relevant components (all seemed ok) and
>then managed to get the correct relationship between 20 and 40 meter outputs
>by adjusting both L1 and L2 as he suggested. The power still seemed low, but
>I used for a few days. Last Saturday I installed the 30-80 upgrade. That
>went ok (but one of the more intense Elecraft experiences!) Everything seems
>ok now except the power is still low. I even made a few contacts Sunday in
>Field day using a wire in a tree in the backyard and the KX1 on it's
>internal batteries. It really is a great thing and I look forward to taking
>it with me on future trips.
>
>The only problem is that the power out with a 13.4V supply, as measured with
>the DL1 dummy load, varies from 2.6W on 30m to 1.9W on 20m, so it is clearly
>below specs. These values are within less than 10% of values from an analog
>Daiwa power meter, so I think they are close to correct. So the question is,
>should I change the two resistors? Is the extra watt on external or 1/2W on
>internal power worth the risk of overdriving the output transistor?
>
>Bernie
>W1AZ
>
>
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