Re: K2: KPA100 Removal
Posted by
Don Wilhelm-4 on
Mar 27, 2011; 10:56pm
URL: http://elecraft.85.s1.nabble.com/K2-KPA100-Removal-tp6212794p6213277.html
Jon,
Your 1/3 rule is right for continuous duty data modes like RTTY, but I
understand (and have not tried to figure out the details for myself)
that plain PSK31 does not come up to a full duty cycle - something about
the coding, so you might go up to 1/2 the normal rated power - 6 or 7 watts.
If you push it more than that, put your hand on the bottom rear cover
once in a while. If it is too hot to hold your finger on it constantly,
then you should back off the power a bit.
73,
Don W3FPR
On 3/27/2011 6:23 PM,
[hidden email] wrote:
> Duhhhhh! Sorry, I wasn't thinking when I asked that.
>
> The KAT100 is out of the circuit completely. All my testing has been
> with the MFJ-941E.
>
> I just removed the KPA100 and tested. My power levels are as commanded
> (usually a little better, but not double) AND my PSK31 signal looks
> like a PSK31 signal again. While I was testing on 17 meters (5 watts
> PSK31), a station in Slovenia came back to me and gave me a 559 with a
> very good IMD.
>
> Given that digital modes are continuous duty, what power level should
> I maintain with the bare K2. My general rule of thumb is 1/3 of max
> power (which is about 15 watts on my bare K2), so I'm thinking 5 watts
> for digital. What do you think?
>
> Jon
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