[1000mp] Dead Band sound?

[D. J.]

In menu 8-4 try the front end in tuned, or turn off your pre-amp, 
(green light on), I think Yaesu refers to it as IPO on which really 
means pre-amp off, confusing.

Dale


On Feb 25, 2005, at 6:44, Brian Smithson wrote:

> Good morning!
>
> I've got a really dumb question: What should a dead band sound like?
>
> I've got a fairly new MkV - xmas purchase. Two weeks ago I installed a 
> full
> set of INRAD's including the roofing filter. I haven't had the radio 
> long
> enough to remember how things sounded before installing the filters.
>
> On a 'quiet' band I hear what sounds like a louder version of the 
> sound you
> get from a seashell - not a hiss but a steady 'whoosh'. It's steady, 
> not
> pulsing, and it is quieter on the high bands (10, 12, 15) than 40 or 
> 80. The
> narrower the filter, the lower the pitch.
>
> Just to be sure, I opened the case and took the roofing filter out of 
> the
> loop with the same result. A little quieter because the gain is down (I
> adjusted RF gain from 14 to 12 after installing the roofing filter). I
> confirmed that the board was getting the 5V that it needs. So I think 
> that's
> ok.
>
> The lower I set the RF gain the quieter it is, but then I'm it would be
> going deaf at that point.
>
> The one thing I haven't done yet is pull out my FT990 and listen - I 
> feel
> like I'm losing my mind and asking a really dumb question, but does 
> this
> sound like a normal sound? Signals are bright and clear - it's just on 
> the
> empty space that it seems louder than it should.
>
> What do you think?
>
> -Brian n8wrl
>
>
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