[1000mp] Faulty roofing filter mod?
Garry Shapiro
garry at ni6t.com
Tue Apr 1 14:43:23 EST 2008
The IF gain adjustment is for tweaking a few dB either way---not 40 dB.
It does sound like Tonno has a problem.
Garry, NI6T
Harold Mandel wrote:
> There is a menu item that will boost the IF amplifier
> signal voltage to compensate for the insertion
> of the filter.
>
> Call or e-mail Inrad. They might even have it on
> the website. It's an easy adjustment, in the hidden menu.
>
> Hal
>
> -----Original Message-----
> From: 1000mp-bounces at mailman.qth.net [mailto:1000mp-bounces at mailman.qth.net] On Behalf Of Tõnno Vähk
> Sent: Tuesday, April 01, 2008 1:29 PM
> To: All about Yaesu 1000mp
> Subject: [1000mp] Faulty roofing filter mod?
>
> Hi,
>
> I have INRAD fooring filters installed on both of my MP-s. They both sounded much quiter after installing a few years ago. Recently one of them became very insenitive and no signals ever came in over 59 any more. So I tried to remove the roofing filter and indeed! Signals went up some 40 db or so! Can it be that roofing filter is damaged? has it happened to anybody? Should I try to get a new one or sth else could be done?
>
> 73
> tonno
> es5tv
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