[Yaesu] Re: Pin Diodes FT-990

Mon, 11 Feb 2002 18:13:41 -0500

No comparison, but same gripe icom 735 big hisser, man!
KE4VJ
----- Original Message -----
From: John Bolduc <[email protected]>
To: <[email protected]>
Sent: Monday, February 11, 2002 5:49 PM
Subject: Re: [Yaesu] Re: Pin Diodes FT-990


> Hi all
>      I have a 990 that I did the pin diode mod too..... My best advice
It's
> a waste of time. I notice no difference. & I am a Tech. The biggest mod
you
> could do to the 990 & 1000MP is fix the IF hiss coming out of the 455khz
> notch circuit !!! Both those radio have the exact same 455 IF circuit
using
> bipolar transistors and the same Hiss !!!!   I'm trying to fix mine and
come
> up with a circuit mod....... And it not just my rig I have many friend who
> have the 990 & they all are hiss box's !!!!!!!!!  So are the MP's it just
> Mask by the DSP filters
>
> 73's john KI4NR
>
>
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