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From: bruggink@vms.macc.wisc.edu
Newsgroups: sci.electronics
Subject: Re: Radio Electronics descrambler
Message-ID: <4998@dogie.macc.wisc.edu>
Date: 20 Dec 90 17:03:50 GMT
Sender: news@dogie.macc.wisc.edu
Lines: 31

I finished building this in the past couple of days.

On unscrambled channels: it's easy to get
a vertical lock, but i have problems getting the horizontal.  I also
can't seem to get consistently good color (stable and saturated);
increasing the dc level improves the color immensely, but then
tearing begins and renders the picture useless.

On the scrambled channels the same applies, but when I get both a
vertical and horizontal lock, the picture is fine except there are
4 alternating vertical regions on-screen where the picture is too light
and too dark, i.e.:
                  -------------------
                  |    |   |   |    |
                  |    |   |   |    |
                  |    |   |   |    |
                  |    |   |   |    |
                  -------------------
                    ^   ^   ^    ^
                 light dark light dark

The image is there, and is watchable, but these bands are also prominant.

I don't have a scope, but the VOM values matched what was in the article
and the subsequent corrections (I ordered the parts from the source; they
sent addenda/corrections).  2 of the voltage regulators get so hot
a touch would burn you (the negative and one of the positive supplies);
I run a cable signal into a vcr, line level to descrambler, line level to
TV.

-db