KX1 with KXAT1 power out fluctuation

[John Shadle]

Just wondering, but should I expect wild fluctuations in power out
measured by the KXAT1 after tuning?

For example, I just installed the tuner and have calibrated it to the
best of my ability. After tuning to a dummy load the power out on 40m
shows values of 1.9 to 2.8 and pretty much everything between those values.

I checked to make sure nothing was touching anywhere or there were any
shorts and didn't see it. I was just wondering if this is normal
behavior (i.e., the wattmeter isn't that accurate) or if something might
be wrong otherwise.

I'll post photos sometime soon of the final build for S/N 1601.

Thanks.
-john W4PAH


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[Don Wilhelm-3]

John,

Some 'uncertainty' can be expected in the KXAT1 wattmeter indication,
but not as much as you report - +/- .2 watts is about what you can
normally expect.  It does take a little time for the power indication to
settle down (the microprocessor is doing a lot of things during TUNE).

I would check the KX1 and the KXAT1 for good solder connections as a
first course of action.

73,
Don W3FPR

John Shadle wrote:

> Just wondering, but should I expect wild fluctuations in power out
> measured by the KXAT1 after tuning?
>
> For example, I just installed the tuner and have calibrated it to the
> best of my ability. After tuning to a dummy load the power out on 40m
> shows values of 1.9 to 2.8 and pretty much everything between those values.
>
> I checked to make sure nothing was touching anywhere or there were any
> shorts and didn't see it. I was just wondering if this is normal
> behavior (i.e., the wattmeter isn't that accurate) or if something might
> be wrong otherwise.
>
> I'll post photos sometime soon of the final build for S/N 1601.
>
> Thanks.
> -john W4PAH
>
>
> _______________________________________________
> Elecraft mailing list
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> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
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> Elecraft web page: http://www.elecraft.com
>
>

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[Koaps]

I wanted to change the white LED lamp to a red one.

I have some red LED's but not totally sure of their
specs.

One of them I have is the same size, clear but red
light, the Internal cathode and anode look the same
size as the white one, but should I do some measuring
with my DMM?

If so what should I look for?

I do have some red colored LED's but they are smaller
in size, from just a little bit to really small.

Thanks for the help,
-Chris


       
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