Re: 5508W AGC fix -- New 3C

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Date Posted: 07:30:20 08/27/01 Mon
Author: Potter
Subject: Re: 5508W AGC fix
In reply to: Tom 's message, "Re: 5508W AGC fix" on 13:26:05 08/26/01 Sun

Hi Tom
I'm sampling the black level during a quiet line in the blanking interval (line 16 on my PAL system) and the correction voltage is applied directly to the AGC filter pin on the IF chip (pin 13 LA7555) where I had previously used a 47uF capacitor as a crude fix.
I'll get a schematic together shortly for you (no scanner here).

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Replies:

AGC fix Schematic -- Tom, 20:25:10 08/27/01 Mon
- Re: AGC fix Schematic -- Jain, 19:11:36 11/27/01 Tue
  - Re: AGC fix Schematic -- Potter, 05:41:58 11/28/01 Wed
    - Re: AGC fix Schematic -- Jain, 14:36:57 11/28/01 Wed
      - Re: AGC fix Schematic -- Potter, 09:55:58 12/01/01 Sat
        Re: AGC fix Schematic -- Jain, 08:22:42 12/02/01 Sun
        Re: AGC fix Schematic -- Potter, 10:40:48 12/02/01 Sun
        Re: AGC fix Schematic -- Tom, 17:34:08 12/02/01 Sun
        This should be read by everyone atempting to build 3 chip -- Jain, 09:16:27 12/09/01 Sun
        Instability on scrambled channels -- Phil Q., 08:35:09 12/12/01 Wed
        Re: Instability on scrambled channels -- Jain, 18:36:54 12/12/01 Wed
        Re: Instability on scrambled channels -- vg, 14:52:00 12/13/01 Thu
        Re: Instability - test it first -- lcs, 20:03:22 12/13/01 Thu
        re: Instability -- Phil Q., 12:27:42 12/14/01 Fri
        Re: re: Instability -- lcs, 20:17:34 12/14/01 Fri
        Re: re: Instability -- Potter, 04:31:38 12/17/01 Mon
        Re: re: Instability - edge detectors mod. -- lcs, 22:00:33 12/27/01 Thu

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