Mixed results with PET video circuit

Hi, all, to post a follow-up. I built the 74LS02 circuit nearly as described, but with no cap between the PET and the horizontal sync inverter. I wasn't surprised when I got nothing on an LCD with composite input, so I dragged out the 9" mono security monitor and was instantly rewarded with a PET BASIC prompt - the only problem was that I couldn't lock in the horizontal. I could get close, so that it was mostly stable, but over time, it would roll faster and faster, no matter how I tweaked the monitor. I tried the "PET Revealed" trick of a pot on the hsync pull-down, but that didn't seem to make much of an impact, and neither did removing it entirely. So I was able to see the PET work, but from a use standpoint, don't quite have the right tweaks on the basic circuit. I'm out of time for the season, or I'd keep fiddling with it (we could get new folks in here in as little as a week, if all the early-season plans go well, and weather permitting, as always). Thanks for all the feedback. I understand things a lot better now, and I'm happy to say that the first time I powered it up, I got recognizable video, even if it did list to port a bit. -ethan -- Ethan Dicks, A-333-S Current South Pole Weather at 16-Oct-2008 at 15:00 Z South Pole Station PSC 468 Box 400 Temp -59.3 F (-50.7 C) Windchill -86.4 F (-65.8 C) APO AP 96598 Wind 7.0 kts Grid 336 Barometer 672.2 mb (10924 ft) Ethan.Dicks at usap.gov http://penguincentral.com/penguincentral.html