For those curious about the status of the LGP-30 restoration, I’ve got a blog up with the latest. http://radar58.com/LGP30/
The power supplies are stable, the blower unit was overhauled and new bearings installed, all the modules have been recapped. I had a noisy bearing in the memory drum, thankfully it was one that could be accessed through the pulley end and I was able to inject fresh grease. There were burnt contacts in one of the open frame relays in the sequencer unit leading to intermittents. I found a NOS 3-pole version with fresh contacts and transferred those over yesterday and we now have correct startup. The ‘digital display’ chassis has been worked over with fresh resistors and this has made the controls much more responsive. The Flexowriter is behaving and the 6 associated FF's in the machine respond to keystrokes. All-told, I’m at the point of troubleshooting the scope display- I have a sad, unintelligible, wavy line, but I believe retrace is derived from the system clock track on the drum, so that’s my next investigation. Both vertical and horizontal boards have been rebuilt and tubes substituted with no change. -C