Motorola roundie

[timmy]

Originally Posted by old_tv_nut

Stop fiddling with A19. Go back to the AFC alignment procedure where you adjust A19 for greatest voltage (meter "deflection"). Do not ever change this again.

Please post some pix with the color bars showing the result with the tint control max CCW, centered, and max CW.

I thought A17 was for max voltage and the hue does not change any color in any position the bars on the pic in a previous post is the same for the most part it’s all red. Since doing the afc I have not turned A18.

[old_tv_nut]

Originally Posted by timmy

I thought A17 was for max voltage and the hue does not change any color in any position the bars on the pic in a previous post is the same for the most part it’s all red. Since doing the afc I have not turned A18.

Yes, A17 is adjusted for max in its step also. My point is to redo the color AFC alignment, then don't touch any of it while looking elsewhere for the problem.

[Username1]

.

Originally Posted by old_tv_nut

Yes, A17 is adjusted for max in its step also. My point is to redo the color AFC alignment, then don't touch any of it while looking elsewhere for the problem.

I agree, decide which crystal delivers the best results, put it in, do the AFC
adjustment as in the Sam's Procedures, then tune A19 for the greatest
color saturation and leave all that alone... I also would like a good
picture of what you call "it's all red" And the color bar pictures.

Please...

.

[timmy]

Originally Posted by Username1

.



I agree, decide which crystal delivers the best results, put it in, do the AFC
adjustment as in the Sam's Procedures, then tune A19 for the greatest
color saturation and leave all that alone... I also would like a good
picture of what you call "it's all red" And the color bar pictures.

Please...

.

I sent a quick video to yamamaya42

[old_tv_nut]

I didn't think of this before because you said you have a good black and white picture, but just as a quick check, swap V20, V24, and V25 amongst each other. If color (or monochrome image) changes drastically, one of these tubes is bad.

[timmy]

Originally Posted by old_tv_nut

I didn't think of this before because you said you have a good black and white picture, but just as a quick check, swap V20, V24, and V25 amongst each other. If color (or monochrome image) changes drastically, one of these tubes is bad.

I have already switched v24 and 25 and I have 1 known good tube I tried in all the sockets no change

[Yamamaya42]

Darn, i was really hoping we had found something here this time!

As i mentioned, one of the big problems with my RCA, was the same coil being 10+ ohms too high, which took me forever to find and fix.

[timmy]

Originally Posted by Yamamaya42

Darn, i was really hoping we had found something here this time!

As i mentioned, one of the big problems with my RCA, was the same coil being 10+ ohms too high, which took me forever to find and fix.

Well I did a quick test with another 15pf cap and with the bar gen I had all kinds of colors flashing but I have to put it back so as it’s shielded but with the original cap nothing like this so I’ll see when I get it back. I have had mica caps go bad so what the heck why not try it

[timmy]

So there is no shelf life for 3.58 crystals. The ones I have are sylvania from 1983.

[Yamamaya42]

Originally Posted by timmy

So there is no shelf life for 3.58 crystals. The ones I have are sylvania from 1983.

No. they are like Disc caps, they last forever, unless physically damaged somehow, or they get wet, etc.

[Username1]

.



Hope this works.... Ok. So Timmy, If you have a color bar generator that can put a pic like this on your
tv screen - can you please set it up and send a few pics of the screen with the color level set to display
enough saturation that we can see the color, and turn the tint knob to far left, Take a Picture, then
turn it 10 minutes then take another pic, then turn it 10 minutes, then send another pic, etc. till
you get to the far right. 10 minutes of knob rotation as if it were an analog clock face please.....

Please take the pictures with the camera right in front of the screen, not far off to one side, please
try & fill the camera's viewfinder with the tv screen so we can easily see how the colors are being
displayed on the tv screen..... Label the pics so we know far left - from - far right....

I know your camera can't upload to vk - send them directly to Yamamaya42 as you did before,
and then he can resize them & post them to his http://suzaku.live-evil.org site for us to see...
Please use that site as other image hosting sites I can't see because of my old computer....
Size should be 790px width auto for height, I believe these are within VK limits....

Thanks!


..

[timmy]

Originally Posted by Username1

.



Hope this works.... Ok. So Timmy, If you have a color bar generator that can put a pic like this on your
tv screen - can you please set it up and send a few pics of the screen with the color level set to display
enough saturation that we can see the color, and turn the tint knob to far left, Take a Picture, then
turn it 10 minutes then take another pic, then turn it 10 minutes, then send another pic, etc. till
you get to the far right. 10 minutes of knob rotation as if it were an analog clock face please.....

Please take the pictures with the camera right in front of the screen, not far off to one side, please
try & fill the camera's viewfinder with the tv screen so we can easily see how the colors are being
displayed on the tv screen..... Label the pics so we know far left - from - far right....

I know your camera can't upload to vk - send them directly to Yamamaya42 as you did before,
and then he can resize them & post them to his http://suzaku.live-evil.org site for us to see...
Please use that site as other image hosting sites I can't see because of my old computer....
Size should be 790px width auto for height, I believe these are within VK limits....

Thanks!


..

I have to get the coil back in before anything and I have done this before I know the color bars but it’s still the same as the pic of the screen mostly red and with enough saturation the hue does nothing to change the colors on the bars at all.

[Yamamaya42]

https://www.amazon.com/Digital-Video.../dp/B00005PJ70

useful, but bloody hard to navigate, the control menu is, interesting.

but it has EVERY thing you need to set up a TV.

[timmy]

Ok I changed the 15pf cap and made no difference I get lock with the new xtal I can get lock with the old xtal but the adjustment is in a different place on the coil. If I run the adjustment in about 4 turns I get all colors jumping around and it’s not locked the video shows this but it’s back to normal lock but only has the one color if you go back maybe 2-3 pages the bar gen pick is what I still have. I did the afc AGAIN and no change.

[timmy]

This is very frustrating not finding anything wrong except the ohms of the oscillator coil wrong or not right colors yet it’s got lock. Did resistance check on v-20-25-24 all are very good. There was a voltage difference between 24&25 going to check again.