[Elecraft] K3 as WSPR transmitter

[donovanf at starpower.net]

Hi Hank, 


While intuitively it would seem that WSPR is a viable method for 
performing antenna evaluations, extreme short term variability of 
the ionosphere makes it into a heroic task... 


The only viable method I've found -- and it works very well -- 
is to install a reference antenna within about 1/2 wavelength 
of the antenna under test, it MUST have the same polarization 
as the antenna under test and ideally -- to avoid interactions -- 
neither antenna should "look through" the other. 


In almost every case -- unless you have local RFI issues -- 
evaluations performed using your receiver produce nearly identical 
results as using your transmitter. 


73 
Frank 
W3LPL 




----- Original Message -----

From: "HP" <pfizenmayer at q.com> 
To: elecraft at mailman.qth.net 
Sent: Sunday, January 5, 2020 9:54:28 PM 
Subject: [Elecraft] K3 as WSPR transmitter 

I see the lore is that the LPA does not care for long key down periods - 
I was toying with using my K3 as WSPR tx on 160 and 80 fpor some antenna 
evaluations. . 

The lore would say its not a good idea ? 

The manual is not clear to me of whether in fact there is a 160 low level out I 
could use for a home brew external amp -The KIO3 transverter bands 
show 160 coded -but other tables talk about just IF of 7 mhz and above. 

BUT its all moot of the LPA is still biased on and limited in key down time ????? 


Hank K7HP 
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