19 replies to this topic

[Travmay]

I recently acquired a 1.25 TV Everbrite Dielectric diagonal with in a bundle of other items. I have no idea of it's history. At very certain angles, I see these lines on the entire face of the mirror. They are not visible during normal use, as a matter of fact they are not visible unless an overhead light hits the mirror just right (it was very difficult to photograph them). The best way to describe them would be cracks, at least that is what the "pattern" looks like. They are definitely not scratches. I have removed the mirror and cleaned it per TV's instructions. Has anyone seen this?

 

 

 

Edit to add: QC mark on the back of the mirror says 2006.

Edited by Travmay, 26 September 2023 - 07:02 PM.

[SeattleScott]

It is dielectric coatings so just try to clean it off. The coating is military grade and designed to be cleaned with most things softer than sandpaper. So give cleaning it a try and see if that fixes it.

[Starman1]

Contact TeleVue by phone. They may want to look at it.
It looks like something got dragged across the mirror, maybe right before coating.
At any rate, something eluded QC.

Hopefully, we're not just looking at the reflection of something.

[SeattleScott]

He said he got it in a bundle of other items. Perhaps garage sale, estate sale, etc. I’m assuming it isn’t new and this is the result of prior use (or misuse) rather than a TV QC issue.

[Migwan]

Are they reflections off the pattern on the right wall or reflecting that pattern onto the right wall?     A & B

 

What is C?

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Edited by Migwan, 26 September 2023 - 07:34 PM.

[briansalomon1]

The mirror is very easy to remove and re-install. I'm sure the factory will advise you to clean it using their procedure before you do anything else.

 

https://www.televue....page.asp?id=103

 

If there is anything on the mirror it shouldn't be difficult to remove. If you follow the procedure you won't damage the mirror.

[Travmay]

It is dielectric coatings so just try to clean it off. The coating is military grade and designed to be cleaned with most things softer than sandpaper. So give cleaning it a try and see if that fixes it.

I should have mentioned, I did disassemble and clean per TV's instructions. It is definitely not something on the surface.

 

Contact TeleVue by phone. They may want to look at it.
It looks like something got dragged across the mirror, maybe right before coating.
At any rate, something eluded QC.

Hopefully, we're not just looking at the reflection of something.

100% not a reflection. The form of these markings looks like the pattern that glass makes when it shatters and they are constant, they do not change when the angle is changed. The "cracks" go from left to right across the entire surface (even under the corners where not visible unless the mirror is removed).

 

He said he got it in a bundle of other items. Perhaps garage sale, estate sale, etc. I’m assuming it isn’t new and this is the result of prior use (or misuse) rather than a TV QC issue.

Yes, it is not new and it could have spent it's life in a 400 degree oven for all I know. This isn't a shot at TV, just wondering if anyone else has seen this.

 

Are they reflections off the pattern on the right wall or reflecting that pattern onto the right wall?     A & B

 

What is C?

See above, certainly not reflections. What you're seeing is the reflection of the "threads" which cover the entire inside of the diagonal, probably serving as flocking. These marking are also visible with the mirror removed from the body.

 

The mirror is very easy to remove and re-install. I'm sure the factory will advise you to clean it using their procedure before you do anything else.

 

https://www.televue....page.asp?id=103

 

If there is anything on the mirror it shouldn't be difficult to remove. If you follow the procedure you won't damage the mirror.

See above, it has been cleaned. I will try to make a video of this tomorrow to better showcase what I see. The photos just do not capture it well.
 

Edited by Travmay, 26 September 2023 - 08:06 PM.

[Tank]

At first it looks like reflection from out walls of the diagonal
However if not that them most likely someone cleaned it wrong
Or
Could need a cleaning
Or
Mold growth on it?
Hard to tell in a pic

[TOMDEY]

Mmm... came with a pile of other used stuff, unknown history. Would seem quite possible / likely that someone along the line / in the chain - tried to ~work on it~ and damaged it. Where I worked, we'd get stuff back from field use made worse by someone else but no one in the chain hinting where the abuse occurred... or even that such treatment ever happened.

 

Especially random components sold as-is in a lot. Sometimes (most often) have been picked thru and the good stuff removed before selling or magnanimously giving away the junk that's left. Each and every piece will have something wrong with it. Similarity: Those bags of "bulk random coins" and stamps sold to amateur collectors. Your chance of discovering a 1909 S V.D.B. in there is absolute zero.    Tom

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[Migwan]

Don't those threads run perpendicular to the light path?   The lines appearing to the right seem to be in line with the light path. 

 

Can you see the linear pattern on the mirror from barrel end of the diagonal?  

 

Try covering the brass ring with something non-reflective.   If that's it, we can call it the Dey's penny effect. 

[Gabby76]

I have a 2" TeleVue Everbrite with the same lines on it and from the same time period. 

The scratches are under the coatings and turn the diagonal into a kaleidoscope.

It has been used as a dust plug ever since.  

 

Edited by Gabby76, 26 September 2023 - 08:54 PM.

[briansalomon1]

I have a 2" TeleVue Everbrite with the same lines on it and from the same time period. 

The scratches are under the coatings and turn the diagonal into a kaleidoscope.

It has been used as a dust plug ever since.  

 

IMG_6994a.jpgI
 

I think TeleVue charged me $150 for a replacement mirror for my 2" Everbright. You have to call and ask for pricing.

[Gabby76]

I do not know the history of Travmay diagonal but my diagonal was purchased new and arrived in that condition. 

It at least makes a great dust plug and desiccant holder. 

Edited by Gabby76, 26 September 2023 - 10:27 PM.

[davidgmd]

I do not know the history of Travmay diagonal but my diagonal was purchased new and arrived in that condition. 

It at least makes a great dust plug and desiccant holder. 

  
I would have returned it. Maybe not so simple from your location since Tele Vue doesn’t do email. I give you credit for being able to laugh about it.

[SandyHouTex]

I recently acquired a 1.25 TV Everbrite Dielectric diagonal with in a bundle of other items. I have no idea of it's history. At very certain angles, I see these lines on the entire face of the mirror. They are not visible during normal use, as a matter of fact they are not visible unless an overhead light hits the mirror just right (it was very difficult to photograph them). The best way to describe them would be cracks, at least that is what the "pattern" looks like. They are definitely not scratches. I have removed the mirror and cleaned it per TV's instructions. Has anyone seen this?

 

IMG_0653.jpg

 

IMG_06552.jpg

 

Edit to add: QC mark on the back of the mirror says 2006.

That's quite a mess.

[Spikey131]

Replacing the mirror would involve 4 screws and 5 minutes of your time.

[alnitak22]

That's quite a mess.

Like a lot of garage sale items.

[Travmay]

I have a 2" TeleVue Everbrite with the same lines on it and from the same time period. 

The scratches are under the coatings and turn the diagonal into a kaleidoscope.

It has been used as a dust plug ever since.  

 

IMG_6994a.jpg

Interesting! I will work on getting a video today to better show the lines.
 

 

Replacing the mirror would involve 4 screws and 5 minutes of your time.

I'm not exactly looking for a solution, just sharing what I have found. Besides, I would have to get a replacement mirror before replacing it right? Actually replacing it would be the easy part.

 

For anyone interested in the story of where I got this, see my other thread linked below. It came in a bag along with a few cheap eyepieces, with an Ultima 9.25 I purchased recently. I didn't even know it was a TeleVue until I got home, so I have literally no money into this diagonal.

 

https://www.cloudyni...ma-925-revival/
 

Edited by Travmay, 27 September 2023 - 12:41 PM.

[Steve Cox]

Do you want to stay with a 1.25" diagonal on the C9.25 or move to 2"?  If you're wanting to stay, it'll be cheaper to buy a new 1.25" Celestron prism at $49 than to pay for replacing the mirror in the TV.  And that Celestron prism is a pretty good diagonal in its own right.  Either way on staying 1.25" or moving to 2" it'll likely cost more to fix that diagonal than just replace it.

[Travmay]

Do you want to stay with a 1.25" diagonal on the C9.25 or move to 2"?  If you're wanting to stay, it'll be cheaper to buy a new 1.25" Celestron prism at $49 than to pay for replacing the mirror in the TV.  And that Celestron prism is a pretty good diagonal in its own right.  Either way on staying 1.25" or moving to 2" it'll likely cost more to fix that diagonal than just replace it.

I have other diagonals I will still probably use this one sometimes, as it did not seem to cause any issues when I tried it the other night.