ken schrieb:

It might "work as a dual conversion" if they used the 10.7 mhz FM IF
transformers as the sw if. I had a Sony once that used that scheme
and it was quite free of images. It would be worth looking into.

BTW, the common IF for SW and FM was apparently dropped in the early
'80s - more current Sonys that use 10.7 MHz as 1st SW IF (like the
ICF-7601 or ICF-SW35) have entirely separate SW and FM IF stages. The
mixing concept varies between analog and digital models - analogs like
the ICF-7601 use fixed 1st mixing frequencies (one per band) and then
tune through the frequencies around 10.7 MHz (2nd mixing frequency is
variable). Digitals like the ICF-SW35 vary the 1st mixing frequency
instead.

Stephan
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I looked at their web sites, and some of their other radios
are listed as specifically being double conversion.

So if you ask them if the KA105 is double conversion,
any answer other than "no" is deliberately deceptive,
in my opinion. They clearly know what the difference
is between single and double conversion.

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