[1000mp] No more distortion with IF modification in Mark V

Sun, 01 Dec 2002 16:25:31 -0600

Hans,

The same holds true for the 1000MP.  It's common for some owners to run the 
IF gain too low.  If too low, it most certainly will distort.  The gain must 
be above the AF noise level of the rig.  You can see it clearly on a scope.

Bill k1xt

>From: <[email protected]>
>Reply-To: [email protected]
>To: <[email protected]>
>Subject: [1000mp] No more distortion with IF modification in Mark V
>Date: Sun, 1 Dec 2002 21:54:43 +0100
>
>I wrote before that I noticed some distortion on the receiver of the Mark V
>with the 70 MHz IF Modification from Inrad. This was the reason to
>de-install the mod after nine months of usage.
>
>After several months I installed the mod again and did some "research" on
>several frequency bands, receiving stations with various signal strengths
>and with various settings of menu 9-1. I did this over the past few weeks.
>
>Standard setting of menu 9-1 in my Mark V is 13.
>
>With settings below 11 I did notice distortion! The more I went below
>setting 11 the more distortion, especially with strong signals. Even on 10
>and 9 there was a noticeable distortion! And with setting 7 I even noticed
>heavy distortion.
>
>With setting 11 there is no distortion noticeable and the S/N-Ratio is
>excellent.
>
>I did some comparisons between the Mark V and the 1000D too.
>
>Bottom line I suggest to listen very carefully and try various settings 
>with
>various signals on various frequencybands, when you have installed the
>IF-mod from Inrad. In my case setting 11 was the optimum. Sofar I did not
>notice any distortion and I am very satisfied with the mod again.
>
>I hope this information is of some use.
>
>73,
>Hans Remeeus.
>
>Ham Radio:
>PA1HR
>
>Sites:
>www.remeeus.nl
>www.qsl.net/pa1hr
>
>e-mail:
>[email protected]
>
>/mailman/listinfo/1000mp
>
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