[Elecraft] K2 hears image or ?

[Sverre Holm]

> I was working a weak station on 21.018 MHz this morning and 
> was annoyed 
> by a carrier on almost the same frequency.  The carrier was fading up 
> and down in a way characteristic of a distant station.  I was 
> surprised 
> to notice that it tuned in the reverse direction from normal signals!


Vic,

There is a certain possibility for image reception on the higher bands.
The 'European' problem was on the 12 m band where both G4AON and I had
the problem. I discuss this in the memo I wrote about the trap that I
fitted to my K2: http://www.qsl.net/la3za/dokumenter/K2_trap.pdf

The problem is that the images for the three highest bands coincide with
broadcast bands:
15 m -> 25 m
12 m -> 19 m
10 m -> 15 m

However, the revised K2 (# 3000+) has some measures to improve this as
both the input bandpass filters for 15/17 m and 10/12 m have improved
stopband rejection, see http://www.qsl.net/la3za/K2/mod3000.html. If you
haven't modified the input filter, then this is the recommended first
measure to take.


--
73, 
Sverre

------------------
Sverre Holm, LA3ZA
www.qsl.net/la3za