Don't dump your CRT RPTV! - Page 271 - AVS Forum
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post #8101 of 12479 Old 02-24-2011, 11:00 AM
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Bob,

I have a Hitachi 57F710, In the service menu under TA1360, mine say no DATA.
There's no options to change anything, Do you change (or have the options to change)
these setting while in the service mode sub menu? I would like to change the setting for
STATG20
STATG10
ColorG
But i cannot find them.

Thank You Sir!

Thanks , For a great forum!
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post #8102 of 12479 Old 02-25-2011, 08:22 AM - Thread Starter
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Quote:
Originally Posted by Splicer010 View Post

Sure, I'd be interested as long as he comes by way Ohio...

Sidney -

Get a couple of calibrations together in your area and we'll do Pheonix along the way -

b

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post #8103 of 12479 Old 02-25-2011, 08:24 AM - Thread Starter
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Quote:
Originally Posted by pocketwatch62 View Post

Bob,

I have a Hitachi 57F710, In the service menu under TA1360, mine say no DATA.
There's no options to change anything, Do you change (or have the options to change)
these setting while in the service mode sub menu? I would like to change the setting for
STATG20
STATG10
ColorG
But i cannot find them.

Thank You Sir!

Thanks , For a great forum!

I take my lead on Hitachis from the great owners here, who have guided me in some incredible ways of improving their sets. There are at least 5 huge threads here in this section on Hitachis.

Hitachi owners, can you help him?

b

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post #8104 of 12479 Old 02-25-2011, 08:26 AM
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Quote:
Originally Posted by Mr Bob View Post

Sidney -

Get a couple of calibrations together in your area and we'll do Pheonix along the way -

b


FOR SALE: Chang Lightspeed Cinema 6.0 w/Hyperdrive power conditioner - was $2,000, now $890. Please PM me, if interested.
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post #8105 of 12479 Old 02-26-2011, 10:37 AM
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What's anybody's opinion on the hulking behemoth, the Mitsubishi WS-73907?

A better PQ than a Hitachi 65SWX20B?

Phosphors away!
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post #8106 of 12479 Old 02-26-2011, 11:08 AM
 
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Quote:
Originally Posted by taichi4 View Post

What's anybody's opinion on the hulking behemoth, the Mitsubishi WS-73907?

A better PQ than a Hitachi 65SWX20B?

Phosphors away!

Oh Bob?
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post #8107 of 12479 Old 02-26-2011, 11:17 AM - Thread Starter
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Quote:
Originally Posted by taichi4 View Post

What's anybody's opinion on the hulking behemoth, the Mitsubishi WS-73907?

A better PQ than a Hitachi 65SWX20B?

Phosphors away!

Yes. The 9" guns will see to that, and the Mit conv sys is better than the Hitachi's. There are still improvements that can be made, like glass front surface rather than the Mit 73's mylar mirror, which is really the only thing the Hit has over the Mit.

But even with the mylar mirror, that 9'" gun set will do better than a 7" gun set of the same capacities, whether made by Mit or Hitachi. The shimming op would improve either set.

And of course bigger. Much bigger.

b

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post #8108 of 12479 Old 02-26-2011, 11:26 AM
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Quote:
Originally Posted by Mr Bob View Post

Yes. The 9" guns will see to that, and the Mit conv sys is better than the Hitachi's. There are still improvements that can be made, like glass front surface rather than the Mit 73's mylar mirror, but even with the mylar, that 9'" gun set will do better than a 7" gun set of the same capacities, whether made by Mit or Hitachi. The shimming op would improve either set.

And of course bigger. Much bigger.

b

All things being equal, does that set age well?

Besides inky blacks, would this set equal modern sets in clarity?

I seem to recall from your earlier posts, Bob, that a glass screen can be fitted to this behemoth. Is the mylar(!) screen alright if front and side illumination are controlled?

447 lbs! (or something close)

Also, I believe it can be separated into two pieces. That must be a bit tricky because of exposed surfaces.

Thanks
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post #8109 of 12479 Old 02-26-2011, 12:53 PM - Thread Starter
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Quote:
Originally Posted by taichi4 View Post

All things being equal, does that set age well?

Whether a CRT set ages well is completely in the domain of the owner. Yes, it ages well, as do they all when they are well cared for.

Quote:


Besides inky blacks, would this set equal modern sets in clarity?

See the screenshots on page 260 of this very thread and ask me that again, if you dare -



Quote:


I seem to recall from your earlier posts, Bob, that a glass screen can be fitted to this behemoth. Is the mylar(!) screen alright if front and side illumination are controlled?

Mylar refers to the mirror, not the viewscreen. The mylar delivers excellent crispness - again see the screenshots on page 260 for examples of mylar in action - and the real benefit of a glass, front surface mirror is in the gain of the light projected, which gets increased by 25%, and the inkiness of the blacks, which is also better on front surface glass than stretched, mirrored mylar.

The viewscreens on late model CRT RPTVs have excellent side viewing. The really older ones are where the lenticulars were just not ready for prime time for years before they came into their own.

Quote:


447 lbs! (or something close)

Gimme a break, it's on wheels, for God's sake!



The movers had no problem getting it in from the moving truck to the garage - still in its factory cardboard box - and it was effortless to move, once out of that box.

Quote:


Also, I believe it can be separated into two pieces. That must be a bit tricky because of exposed surfaces.

Thanks

How to separate it is all in the owner's manual, and it goes back together without a hitch or a scratch.

All displays are subject to the owner's - or mover's - carefulness in whether they get nicked/scratched/ding'd or not.


b

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post #8110 of 12479 Old 02-26-2011, 01:12 PM
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I will check out those pages, Bob.

I was confused, apparently, thinking that the screen had some mylar substrate or something. Of course the mirror makes more sense, as I was familiar with mylar when I was a kid. Had pieces of it as a thin, weightless, mirror foil.

So...if I take it correctly it's possible to replace the mylar mirror in this model with a glass mirror? (Again...memories from posts long ago gurgle up from the unconscious.)

So the screen of this Leviathan is glass?

Thanks
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post #8111 of 12479 Old 02-26-2011, 01:20 PM
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Very solid, inky, rich images on 260, Bob.

Is that from the 73 inch Mits?

When they refer to this model as HD-Upgradeable, is something needed other than an HDTV tuner box from my cable company? I realize cable boxes are not the creme de la creme.
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post #8112 of 12479 Old 02-26-2011, 01:33 PM - Thread Starter
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Quote:
Originally Posted by taichi4 View Post

I will check out those pages, Bob.

I was confused, apparently, thinking that the screen had some mylar substrate or something. Of course the mirror makes more sense, as I was familiar with mylar when I was a kid. Had pieces of it as a thin, weightless, mirror foil.

So...if I take it correctly it's possible to replace the mylar mirror in this model with a glass mirror? (Again...memories from posts long ago gurgle up from the unconscious.)

So the screen of this Leviathan is glass?

Thanks

The view screen is 2 layers of plastic - a fresnel (magnifying glass smushed flat) and a lenticular (dispersal screen with vertical ribs).

You can get a glass mirror for this set from www.highreflectivemirrors.com, out of Santa Rosa.

b

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post #8113 of 12479 Old 02-26-2011, 03:24 PM
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Question for Mr. Bob?
In your pov, can a RPCRT HDTV be modded by utilizing a front projector capable of
1080p resolution as follows:
a) example equipment-Hitachi 65F59 HDTV and NEC XG135LC front projector.
b) only use the upper housing chamber of the Hitachi assembly for the mirror, screen. modify or custom build a stand/base assembly to house the Nec projector to couple underneath the "Modded" undercarriage of the f59 upper housing assembly.
c) utilize a NEC HDMI card in one of the XG135LC video slots or use a processor like the Radiance XD or other for color processing. That may not be needed if a pro like you fully calibrated the NEC projector and used a HD Fury on one of the componenet inputs.

I guess my real question is would that type of modded assembly be feasible if done properly. Basicly you would be flushing the guts of the Hitachi and replacing it with a better front projector capable of throwing a superior image at the enclosed CRT RPTV screen in full 1080p. You would lose the speakers and audio from the Hitachi. But you would direct out to your HT Audio system anyway in a setup like this. There are some real gem CRT HDTV obsolete projectors out there capable of going 1080p. And there are a bunch of RPTV housing units out there which can accommodate them. I know that if this was a realistic option, I would seriously consider grabbing a used NEC 135 projector in a heartbeat, have a custom bottom assembly built, and fly you out to New England to assemble and calibrate/clean/repair the whole thing. Is this just a brain fart or an interesting idea from your pov. You won't insult me by calling it the former. I've just often wondered about doing something like that in lieu of switching to something like a DLP. I love my current Hitachi 65f59. And if it could be improved by a mod like that, I'm all for it. And it would be reasonably inexpensive to do. The added bonus is that you could still reassemble the Hitachi under unit when the mod needed calibration or repair.
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post #8114 of 12479 Old 02-26-2011, 04:33 PM
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You will need very short throw lenses(f1.1) or better. Most fp (including the NECxg135) won't have these. What you are talking about is close to the Runco 991rp I own which can be viewed on the earlier thread titled"Best Rear Projector Made?". It uses an NEC xg75 with LC lenses. I posted pics there and noted the lenses used were prototypes developed by either NEC or Runco for the shorter throw distance in a rear projector set up. Care to chime in, Mr. Bob?
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post #8115 of 12479 Old 02-26-2011, 08:08 PM - Thread Starter
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Yeah, it's not just the lenses that need to be short throw, it's the electronics as well. The geometry/convergence, to be exact.

We tried this at Hermary's in San Carlos many years ago, and everything about a ceiling projector is made for long throw, like at least 9' if not more. We could never get it to look decent with the super short throw of an RPTV configuration.

Steve's 991 would be perfect, and would be a wonder to behold once completely dialed in. Unfortunately Steve's has sidebar screenburn, which would have to be factored in, possibly including regunning it if opposing negative patterns would not do the trick.

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post #8116 of 12479 Old 02-27-2011, 09:01 AM
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A technician, who did a very careful cleaning of the lenses of my old Mits 7001, had an interesting response when I asked him about resuscitating my old set. He said the "filters" start to go on these older sets. Of course my old set is really old, and has a host of problems.

What did he mean by the filters going, or is this just a case of babblespeak?
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post #8117 of 12479 Old 02-27-2011, 09:09 AM
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Thanks for responding guys. Sure would be nice if this was an option. One could actually start a boutique business out of creating something much better than the new, from the old and discarded. One final question though. Couldn't one couple a short throw lens adapter to a long throw lens, just like you would with a camera? Or even replace the lens elements from one unit to the other? My gut tells me everything internal to the new system would need to be realigned and re calibrated to a new spec from scratch. I guess Bob is saying, it's not really worth it unless you can find a discarded 991 on the cheap. I'll keep my eyes peeled for such a unit. Can they display in 1080p via HDMI? Or are they limited to 720p?
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post #8118 of 12479 Old 02-27-2011, 09:40 AM - Thread Starter
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Quote:
Originally Posted by taichi4 View Post

A technician, who did a very careful cleaning of the lenses of my old Mits 7001, had an interesting response when I asked him about resuscitating my old set. He said the "filters" start to go on these older sets. Of course my old set is really old, and has a host of problems.

What did he mean by the filters going, or is this just a case of babblespeak?

It's pure babblespeak to me. Would he like to elaborate?

I cleaned the optics an a 20 year old Pioneer Elite recently - I reprinted the owner's email back to me about it - offering to even talk live with anyone who's interested, he was so excited later.

His set had no problems at all.

b

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post #8119 of 12479 Old 02-27-2011, 09:50 AM - Thread Starter
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Quote:
Originally Posted by barrelbelly View Post

Thanks for responding guys. Sure would be nice if this was an option. One could actually start a boutique business out of creating something much better than the new, from the old and discarded. One final question though. Couldn't one couple a short throw lens adapter to a long throw lens, just like you would with a camera? Or even replace the lens elements from one unit to the other? My gut tells me everything internal to the new system would need to be realigned and re calibrated to a new spec from scratch. I guess Bob is saying, it's not really worth it unless you can find a discarded 991 on the cheap. I'll keep my eyes peeled for such a unit. Can they display in 1080p via HDMI? Or are they limited to 720p?

Not quite. Please strike "on the cheap" from anything I would say about this. You're talking about a $30,000 unit when you talk about Steve's set. And any 991 that was "discarded" was probably not treated right when it was actually in use.

Steve's 991 should be bought by someone who really appreciates the best, and doesn't mind if it's going to cost a bit more to get there. Steve is selling his 991 for fraction of what it originally retailed for, and if it's the same line of NEC front pjs that could do line doubling, tripling and quadrupling effortlessly, it can do 1080p standing on its head. HDMI is no hindrance because of HD Fury II and III. With today's HD, once dialed in it will show images that Runco could only dream of throwing at it back when it was produced. Signal generation was the only way to push these projectors to their limits, and there was NO HD content - nor anything even close to it - to test them with back then, like there is now.

Such quality will not come without a price, even in today's CRT climate, being replaced by fixed pixel. You may still have to pay a bit more for the best.

b

PS - such modifications of which you speak require intense R&D even from long-established entities like Runco. Don't even think about being able to pull it off as a simple consumer. If you do I'l eat my words, but I would not even start to embark down that path and I'm a pro.

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post #8120 of 12479 Old 02-27-2011, 04:17 PM
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Quote:
Originally Posted by Mr Bob View Post
I take my lead on Hitachis from the great owners here, who have guided me in some incredible ways of improving their sets. There are at least 5 huge threads here in this section on Hitachis.

Hitachi owners, can you help him?

b
I sent him here!
Anyone with a 710?

Downloadable FREE demo discs:
http://www.avsforum.com/t/1475769/de...ently-authored 

Did you really need to quote that entire post in your reply?
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post #8121 of 12479 Old 02-28-2011, 10:48 AM
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I live in the Phoenix area and would consider joining others in covering Mr. Bobs flight and hotel, but have a question Mr. Bob (and please pm me if you can't discuss price on an open forum.) I have a Pro-620 and adjusted image via service menu, looks great but was wondering cost on shim job and basic calibration.
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post #8122 of 12479 Old 02-28-2011, 11:44 AM
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Quote:
Originally Posted by UofAZ1 View Post

I live in the Phoenix area and would consider joining others in covering Mr. Bobs flight and hotel, but have a question Mr. Bob (and please pm me if you can't discuss price on an open forum.) I have a Pro-620 and adjusted image via service menu, looks great but was wondering cost on shim job and basic calibration.

Perfect! We can split the cost of his flight. Any others that want to jump in on a Phoenix, AZ trip??

Dave

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post #8123 of 12479 Old 02-28-2011, 04:37 PM - Thread Starter
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Quote:
Originally Posted by UofAZ1 View Post

I live in the Phoenix area and would consider joining others in covering Mr. Bobs flight and hotel, but have a question Mr. Bob (and please pm me if you can't discuss price on an open forum.) I have a Pro-620 and adjusted image via service menu, looks great but was wondering cost on shim job and basic calibration.

My calibrations are a cornucopia of offerings, some included in the basic cal package, some extras. A lot also depends on how many scanrates you are using, and if one of them is 480i, how many aspect ratios. And which kind of overscan redux you'll want done, which also is inextricably bound to how many scanrates you are running.

Give me a call and we'll discuss your particular situation -

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post #8124 of 12479 Old 03-02-2011, 10:57 AM
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I've got my sights on a Mits 73907, then read a post of yours, Bob, discussing it alongside a 73615. So you do feel that lack of DVI and HDMI is a bit of a disadvantage?

What's the PQ difference between the two?

Thanks
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post #8125 of 12479 Old 03-02-2011, 07:25 PM
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Quote:
Originally Posted by taichi4 View Post

A technician, who did a very careful cleaning of the lenses of my old Mits 7001, had an interesting response when I asked him about resuscitating my old set. He said the "filters" start to go on these older sets. Of course my old set is really old, and has a host of problems.

What did he mean by the filters going, or is this just a case of babblespeak?

If he's a real old-timer, he might refer to capacitors as 'filters'. The function of many of the caps in a circuit is to filter out ripple and noise in power supplies and power rails, especially in older linear power supplies.
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post #8126 of 12479 Old 03-02-2011, 11:05 PM
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Quote:
Originally Posted by ChuckF. View Post

If he's a real old-timer, he might refer to capacitors as 'filters'. The function of many of the caps in a circuit is to filter out ripple and noise in power supplies and power rails, especially in older linear power supplies.

Thanks for that very interesting piece of information.

Do capacitors wear out in time on these sets?

You know, I was looking at a Mitsubishi 73907 on craigslist. It was priced too high originally, and the post was active for quite a while, then disappeared. Before that I was watching to see if he'd get more reasonable in price, and then the post disappeared.

Today the post reappeared with the set at a lower cost. I e-mailed the guy to express interest, and then... bang... the post disappeared again. Curious. I might have to set my sights on the Hitachi 65 inch. At least it has DVI.
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post #8127 of 12479 Old 03-03-2011, 08:17 AM
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Well, the fellow with the 73907 did respond, so I'm wondering if that giant set (with no burn in, good brightness, and owned by someone media savvy...I haven't seen it yet....this according to his email response) is a good purchase even if it has no DVI or HDMI. Will all cable boxes and DVD players work on this thing?

Thanks
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post #8128 of 12479 Old 03-03-2011, 08:51 AM
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I found this forum thread where a number of 73907 owners were angry that their set wouldn't take HD input. The last post, from the forum moderator, says it will work through component (as Bob said) or through HDMI. Does this set have an HDMI connection?

I'm intrigued by this 73 inch CRT RPTV, but don't want to start with obsolescence!
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post #8129 of 12479 Old 03-03-2011, 11:32 AM
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Originally Posted by taichi4 View Post

I found this forum thread where a number of 73907 owners were angry that their set wouldn't take HD input. The last post, from the forum moderator, says it will work through component (as Bob said) or through HDMI. Does this set have an HDMI connection?

I'm intrigued by this 73 inch CRT RPTV, but don't want to start with obsolescence!

Search for "HD Fury," a reasonably affordable option.

Downloadable FREE demo discs:
http://www.avsforum.com/t/1475769/de...ently-authored 

Did you really need to quote that entire post in your reply?
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post #8130 of 12479 Old 03-03-2011, 12:11 PM
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Originally Posted by LastButNotLeast View Post

Search for "HD Fury," a reasonably affordable option.

I found three versions of HD Fury...Models 1, 2 and 3, and some posts about RPTV problems with HD Fury 1, supposedly eliminated with the newer versions.

There's also this ViewHD Two Input HDMI to RGB Component, which can be gotten for 79.00 on Amazon, and is rated 4 stars by users.

But I thought from previous posts that you can connect boxes and dvd players through component inputs. I'm hoping this is true, so this set will work without additional outlay.

Also, I'm not certain if the 73907 has HDMI. If it did, wouldn't that work?


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