[Elecraft] KX3 - Roofing filters

[JP O'Connor]

Hello Pierre,

It is most likely not a roofing filter issue. Rather it is probably a local
oscillator leakage issue. Set the "RX ISO" menu item to "ON" and I suspect
the problem will significantly diminish, if not disappear. See page 38 of
the current KX3 owner's manual (Rev B4) for this menu item and for a
discussion of when it may be helpful. Be sure to first refer to the "Tech
Mode" section on page 35 to unlock this menu item.

73 de JP WF4Z



On Mon, Jul 23, 2012 at 10:34 PM, Pierre <ve2pid at videotron.ca> wrote:

> Hello to all.
>
> Maybe that I don't understand the real utility of the roofing filter but I
> observed this. Last saturday, we were on a SOTA summit using two KX3s about
> 40 feet appart transmitting CW at 5 W. And even with  the roofing filters
> on, we heard each other's sending as a diffuse noise. I know that changion
> RX shift to 8 disable the roofing filters, but we were not using that shift.
>
> So, am I missing something about the use of these filters? Are they
> designed for operations with operators near each other like SOTA activation
> on a crowded summit ?
>
> 73, de VE2PID KX3 S/N 190
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