|
#1
|
||||
|
||||
Is that funky thing towards the top left corner (of the convergence board) a selenium diode pack? I also figured out the static convergence last night so I got a much better picture. I'm just learning about delta gun CRT setup. There's something about the color on these old sets, It's almost like Kodachrome............ |
#2
|
||||
|
||||
Quote:
__________________
Tom C. Zenith: The quality stays in EVEN after the name falls off! What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4 |
#3
|
||||
|
||||
Very strong CRT. The conv problem is mostly center conv. When you
get the center good the edges will follow. All the controls on the conv PCB are wire wound so they feel "scratchy" compared to to regular carbon pots. For the color first turn off AFT or AFC if it has it then put back on after fine tuning. You can also turn the color killer control all the way off. The set uses a bunch of 6GH8 tubes so pick up some of those NOS, they are nothin but trouble. The 6GH8 & there sockets were the biggest fault of these sets ! You are off to an excellent start with this one, nice buy ! 73 Zeno LFOD ! |
#4
|
||||
|
||||
Quote:
Is a 6GH8 and 6GH8A the same? |
#5
|
||||
|
||||
Generally yes and 6GH8's are descendants of the 6U8 and 6EA8. There is an article I need to find on what was "improved" on the -A, possibly only improved filament warm-up time, as they were used in some series-wired filament (transformerless) TV's.
__________________
"When resistors increase in value, they're worthless" -Dave G Last edited by DavGoodlin; 05-09-2018 at 08:54 AM. |
Audiokarma |
#6
|
|||
|
|||
Quote:
It still good practice to have a few extras on hand. |
#7
|
||||
|
||||
Quote:
The CTC38 (and several before it) were consummate 6GH8-eaters
__________________
"When resistors increase in value, they're worthless" -Dave G Last edited by DavGoodlin; 05-09-2018 at 08:57 AM. |
#8
|
||||
|
||||
Yeah I only found one 6GH8A in the set, which tests good, I'm gonna check the solder joints at that socket and a few other places.
Now when I set up the purity, do I just feed the set a "blank" signal? I don't have a crosshatch/colorbar generator, Ive just been using the picture viewing feature on my DVD player, with various patterns of course. In the mean time enjoy some badly converged Star Trek |
|
|