Tech-Master NIB TV Kit #5516

[Kevin Kuehn]

This is the only kind of width sleeve I've ever encountered(admittedly not many). This particular one was never insulated, which is kind of scary knowing it was slid in between the CRT neck and the yoke, but I believe it was common for the yoke to have an internal paper sleeve when these were used in a production set.

[Crist Rigott]

Originally Posted by Kevin Kuehn

This is the only kind of width sleeve I've ever encountered(admittedly not many). This particular one was never insulated, which is kind of scary knowing it was slid in between the CRT neck and the yoke, but I believe it was common for the yoke to have an internal paper sleeve when these were used in a production set.

Thanks Kevin. The strip that I'm using seems to work well.

[Crist Rigott]

My CL-90 came in and I installed it between the line and the 10 ohm resistor in the filament string. I installed it with the long leads and in the open. It took the voltage from 117vac to 113vac for the 115vac filament string.



I then installed the 15 ohm 50 watt resistor from the line to the B+ supply. With the resistor installed and the TV plugged in the wall, the B+ is now 132 volts.



Then I installed my speaker disconnect using some RCA phono jacks and plugs.





This pretty much concludes the assembly of the chassis.

The thing that still bothers me is the too wide picture and I had to use the sleeve to reduce it. When using the sleeve the HV is reduced by a fair amount. I really didn't like reducing the HV from 14.5Kv to around 10.5 to 11Kv.

[Kevin Kuehn]

It does seem more common to not have enough width. I suppose you could experiment with a 50 degree yoke, but hard telling what that will do to linearity and high voltage. Overall you have a very successful project.

[Crist Rigott]

Originally Posted by Kevin Kuehn

It does seem more common to not have enough width. I suppose you could experiment with a 50 degree yoke, but hard telling what that will do to linearity and high voltage. Overall you have a very successful project.

Kevin,
Yeah, I thought of substituting the yoke.

Another though I had was seeing if I can find a 90 degree CRT instead of the 70 degree that I have now. These were just some thoughts I had but I never followed up on.

Thanks. I am pleased on how it turned out.

[dieseljeep]

I went through most of the pages and noticed the set uses a width coil, but don't remember reading that you tried to adjust it. It does affect the tune of the flyback. It's amazing, that there is excessive width using a 21" CRT on a low B+ chassis.

[Crist Rigott]

Originally Posted by dieseljeep

I went through most of the pages and noticed the set uses a width coil, but don't remember reading that you tried to adjust it. It does affect the tune of the flyback. It's amazing, that there is excessive width using a 21" CRT on a low B+ chassis.

Like most width coils, there isn't much change when adjusting them. I adjusted the coil to the most minimum width.