[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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