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Old 7th Feb 2019, 12:35 am   #201
19Seventy7
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Default Re: CRT is brighter to one side [Hitachi CTP213]

Quote:
Originally Posted by sexton_mallard View Post
Congratulations! It made my evening when I saw your 'eureka' picture of your telly working. You persevered and did not give up!
Thank you! I’m glad it made other peoples evenings, aswell as mine! It was a great end to a not-so-great day!

Thanks
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Old 7th Feb 2019, 12:39 am   #202
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Default Re: CRT is brighter to one side [Hitachi CTP213]

Quote:
Originally Posted by rambo1152 View Post
Still available for download, or perusing on line

https://archive.org/search.php?query...N.+Patchett%22

I suppose I must have studied Patchett at collage.
I still have my copy of Geoffrey H Hutson's Colour Television Theory we used in the second year.

Aaron,
I know you are a student, could I ask what you are studying?
I’ll have a look at that link, too! Thanks for linking it

I study photography, not a keen subject but I was interested in trying it - on a little vintage side line, i have a Agfa camera from Germany made in the 50s or 60s(?) and Moshva from the 60s or 70s(?) which is a USSR made camera, and my favourite, a 1983 Olympus OM30.

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Old 7th Feb 2019, 1:32 am   #203
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Default Re: CRT is brighter to one side [Hitachi CTP213]

I got darkroom equipment for my 13th birthday.
I was very upset when my half-frame Minalta was ruined by sand.
75+ shots on one cassette of 35mm, it really should have been a more popular format.
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Old 7th Feb 2019, 12:58 pm   #204
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Default Re: CRT is brighter to one side [Hitachi CTP213]

I really enjoy using the dark room in college, i havent yet got to developing film, but we’ve done similar stuff. Thats a shame it got ruined, relatively easy for something to go wrong with them, i’d have thought(?)
Thats a really good format - could definitely be useful when you have to take multiple shots!
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Old 7th Feb 2019, 11:42 pm   #205
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Default Re: CRT is brighter to one side [Hitachi CTP213]

Here are some photos of the working set

The photo of Cliff is from my TOTP VHS, which is of lesser quality (as it is 40 year old tape) along with the Elton John photo (Which is with the colour turned all the way down to try and achieve Black and White)

The picture of the Titanic is from my Xbox 360, reading a DVD, as well as the Xbox Logo, which were taken before the TOTP VHS

I'll upload some better photos tomorrow, using the Xbox one, which gives a slightly better image.


Thanks
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Old 8th Feb 2019, 1:48 am   #206
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Default Re: CRT is brighter to one side [Hitachi CTP213]

Out of interest, does the 50Hz flicker bother you? That's one thing I really notice now with CRT sets, which I never used to notice at the time.

Have to say those pictures look great, the colour balance looks very good. These old Hitachi sets really are good, much better than the later "Instavision" with their short lived CRT's
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Old 8th Feb 2019, 2:36 am   #207
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Default Re: CRT is brighter to one side [Hitachi CTP213]

I do notice the flicker, but mainly when i’ve just started watching, or if there is a relatively solid light colour, but that doesn’t bother me. I’m all about originality so i see it as “If it was like that when it was new, it’s how i want it”

The picture is great, when i set the xbox back up again i’ll have to show the true quality of the image from youtube. I’d even say its better than a trinitron TV i’ve used occasionally, and those were considered to be good sets.

The colour balance was very awkward to get, lots of time adjusting, but i got there.

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Old 8th Feb 2019, 11:08 am   #208
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Default Re: CRT is brighter to one side [Hitachi CTP213]

The grey scale looks very good. As you probably realize the art of adjusting a CRT colour TV is to obtain the best possible black and white picture, with the colour turned down of course!

You then just advance the colour control and there you have it. Correct grey scale adjustment is very important. J.
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Old 9th Feb 2019, 1:20 am   #209
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Default Re: CRT is brighter to one side [Hitachi CTP213]

Many of us here will have seen, and have been fascinated, by this film, before we ever saw a colour TV in the flesh.

It describes a type of set with a delta-gun CRT, not an in-line one like yours so some of the adjustments are not required on yours, but who knows, maybe you will want to restore one from this era.

The film is a bit worse for wear, the uncredited narrator is one Michael Aspel.

Just for Aaron, "The Colour Television Receiver" AKA "The Colour Television installation film"!

https://www.youtube.com/watch?v=BkrLf_9n_7w
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Old 9th Feb 2019, 4:05 pm   #210
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Default Re: CRT is brighter to one side [Hitachi CTP213]

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Originally Posted by Heatercathodeshort View Post
The grey scale looks very good. As you probably realize the art of adjusting a CRT colour TV is to obtain the best possible black and white picture, with the colour turned down of course!

You then just advance the colour control and there you have it. Correct grey scale adjustment is very important. J.
With the colour turned all the way down, only hints of colour is shown, I might need to do some further readjusting to see if i can remove these hints, but it’s a really nice picture.

I was actually trying to adjust the colour scale with colour up, then i remembered someone on here mentioned that to get a good colour picture, you need a good b/w picture.

Thanks
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Old 9th Feb 2019, 4:09 pm   #211
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Default Re: CRT is brighter to one side [Hitachi CTP213]

Quote:
Originally Posted by rambo1152 View Post
Many of us here will have seen, and have been fascinated, by this film, before we ever saw a colour TV in the flesh.

It describes a type of set with a delta-gun CRT, not an in-line one like yours so some of the adjustments are not required on yours, but who knows, maybe you will want to restore one from this era.

The film is a bit worse for wear, the uncredited narrator is one Michael Aspel.

Just for Aaron, "The Colour Television Receiver" AKA "The Colour Television installation film"!

https://www.youtube.com/watch?v=BkrLf_9n_7w
I’ll watch that video right after replying!

Aren’t delta gun sets a lot more tricky to repair? I think i read something about it on here. I’d most likely like to restore a set from the 50s-80s (im not much of a fan of 90s+, but i’d be up for it if need be)

Thanks for that link! I’ll get to watching right now!

Thanks
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Old 10th Feb 2019, 12:50 am   #212
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Default Re: CRT is brighter to one side [Hitachi CTP213]

The following photos are to wrap this thread up

Being a Stones' fan, I put on Sympathy For The Devil on YouTube when playing around, and found that it gave a brilliant picture, so I tried Paint It Black, and I think they've given the best picture I've seen on the set... yet

The colours are a lot more vibrant, Phone cameras aren't the best
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Old 10th Feb 2019, 12:30 pm   #213
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Default Re: CRT is brighter to one side [Hitachi CTP213]

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The following photos are to wrap this thread up
I'll wrap it up then.

Thread closed.
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Old 10th Feb 2019, 9:40 pm   #214
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Default Re: CRT is brighter to one side [Hitachi CTP213]

Reopened by request.
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Old 10th Feb 2019, 9:49 pm   #215
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Default Re: CRT is brighter to one side [Hitachi CTP213]

Thanks for re-opening.

I had a question I asked earlier in the thread, which never got answered as it wasn't important at the time.

I thought i'd ask on here again, as it's for my Hitachi and it keeps the forum "Tidier"

The picture on my screen is slightly wonky, it's higher to the right of the screen than it is the left, it's not a dramatic angle, but noticeable.

How do I fix this? I think I saw on a video some time back that it's the deflection yoke? Does this need adjusting?

Thought i'd ask to be safe.

Thanks
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Old 10th Feb 2019, 9:52 pm   #216
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Default Re: CRT is brighter to one side [Hitachi CTP213]

May be a slight twist is needed though they are not normally loose.
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Old 10th Feb 2019, 9:57 pm   #217
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Default Re: CRT is brighter to one side [Hitachi CTP213]

So it is the yoke?

Does it need to be undone anywhere, like screws or clips, or is it just sitting there?

Thanks
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Old 10th Feb 2019, 11:30 pm   #218
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Default Re: CRT is brighter to one side [Hitachi CTP213]

The yolk is probably fastened to the CRT neck with a clamp. It may also be secured with adhesive pads around the flange of the tube in quite a permanent way.
Some yolks were not intended to be adjusted after manufacture, and if the error is only noticeable on close inspection, it maybe within tolerance.

I suggest you post some clear pictures of the yolk before you attempt any adjustment.
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Old 10th Feb 2019, 11:52 pm   #219
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Default Re: CRT is brighter to one side [Hitachi CTP213]

Okay, thank you, I think I may have some photos, but I'll check, and i'll take some more up close shots, to help - though that will probably have to be tomorrow.

The slant is only a small angle, but as I've said, it's noticeable, though I can live with it if need be.

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Old 11th Feb 2019, 1:11 am   #220
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Default Re: CRT is brighter to one side [Hitachi CTP213]

A fix that doesn’t involve taking the back off the set: put some bits of cardboard under one end of the cabinet, repeat until picture is level!!

Only joking, personally I’d leave it alone, as the set is working well now, and you can cause convergence errors by messing the scan coils/ yoke about, I know wonky pictures can be annoying though! I’ve twiddled many yokes to try and level a picture.

Regards
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