I also felt 250 Hz would be to narrow for my operations. I got a 500 Hz
filter for a FT-1000 and installed it in the 250 Hz filter spot. When I
want cascaded 500 Hz filters, I push the 250 Hz button on the radio. Very
steep skirts now with both filters.
Dave - N8IT
On Mon, 11 Aug 2003, Mike VK4DX wrote:
> I just bought a second hand FT990 AC. It came with buillt in 500 Hz
> (10.9MHz) CW filter. This one has been described as a "CW-wide" filter
> in the manuals book. There is also place for optional "CW-narrow"
> filter, the book reffers to 455 kHz 250 Hz filter which, by my
> understanding is activated by pressing "250" button on the front panel
> of the radio.
>
> Since this one is somewhat too narrow for my taste i'm thinking of
> putting another 500Hz,(this being 455 kHz one) in that slot.
>
> The question is how this one will be activated ? Will it be activated
> together with the other 500 Hz filter (10.9 MHz one) by pressing 500
> button or just as the 250 Hz(455 would be activated, by pressing 250
> button ?
|