CurtPalme.com Home Theater Forum

stefuel · Posted: Mon Nov 08, 2010 10:47 pm Post subject:

"You have a 4000 there do you?"

Yep. And it's got your name splattered all over it Laughing

**AnalogRocks** · Posted: Mon Nov 08, 2010 10:50 pm Post subject:

**AnalogRocks** · Posted: Fri Aug 12, 2011 7:16 am Post subject:

Psssssst, still going. I'll shadup now though 'cause I'll jinx it here on page 13. Wink

**AnalogRocks** · Posted: Thu Nov 19, 2015 3:04 am Post subject:

Just thought I would archive this post by Tse:

http://lowtek.ca/ampro/

"TSE (scott - an Ampro expert) pitched in with exactly the advice I needed.

The sub-brite controls can put the darker video levels out of range of the video amplifiers. If too low the dark information is gone. Turn contrast to a low level like 20 or 30. Set brite to 70. Turn up G-2 so tube screen is totally lit up. Adjust sub-brite so lowest video levels are visible. Look in lens to see. Then set G-2 properly. The SB50 pics have sub-brite set so darkest video information is just visible. SB11 pics have sub-brite set toward low end of range. With sub-brite too low the lower levels of the stairstep pattern are not there. The tube is lit up but there is no information. Don’t turn the sub brites too high as it makes the amplifiers run hotter than they need to. Just enough for the dark information to show.

Scott"

**AnalogRocks** · Posted: Thu Nov 19, 2015 3:40 am Post subject:

Also:
TSE:
"The six devices attached to the registration amp heatsink have thermal shutdown circuits built in. They will turn off if they overheat. Once cool they will turn back on. So if the green vertical amp overheats the green will jump to the position it is in when registration is turned off. Same for blue horizontal, red vertical…..

Check that the screws are snug, they can loosen over time