[Elecraft] KX1 IF filter tuning?

[Richard Stasiak]

More test information for the group.

I looked at my filter tonight on my KX1 and found that my results were very
similar to Jeff  WK6I's tests.

> 1. at the narrowest Filter setting (full CCW) the filter is centered at
> 465Hz, with a nice shape (BW not measured)
My peak was closer to 500 hz. (I have my KX1 set to 540 hz sidetone)

> 2. as the Filter control is moved CW, two peaks start to appear.
same here

> 3. the lower peak is always below 600Hz, while the higher peak moves
higher
> with wider settings (more CW)
ditto

> 4. the trough in between the peaks is -8dB to -14dB (relative to the lower
> peak) after the 12 o'clock position (when I started measuring it)
ditto again

> 5. at wider settings the higher peak was weaker than the lower peak
ditto again

My KX1 is #188 and it has the ATU and 30M board.

73
Rick ve3mm