Living in an OS 9.X - ADB/SerialMac World . . .

[Bunsen]

woz's idiot, blue jeans/designer t-shirt wearin' partner coming back without a REAL COMPUTER GUY (read:the woz, obviously [] ]'> ) to keep said idiot in line.

There were plenty of real computer guys at NeXT, and he brought them all with him.

(miserable failure) NeXT technology

Err, beg to differ. From a market penetration point of view, certainly, but as technology? NeXTSTEP was streets ahead of anything else on the market, especially as a development environment. And even the market failure could be partly blamed on the non-compete contract Jobs had to sign when leaving Apple.

IMHO, integrating NeXTSTEP is what saved Apple in the long run. The iMac was a reprieve from immediate doom, but porting the best available Unix development environment is what saved the platform. A cool Unix dev system attracts the alpha geeks, the alpha geeks build the coolest software, the cool software attracts the customers.

I don't know if you know this, but OS X is kind of awesome.

NON-COMPUTER $-Cows as iPods, iTunes, and most recently iPhones.

Sorry - how is an iPhone or an iPod Touch not a real computer?

 

[Mike Richardson]

That Blueberry, Tripod Mounted CRT might not be quite ready for the gutting knife yet, I get a full five minutes out of it before I ever see a jitter and then I've only seen one pop/zoom event/thingie after it had been running for over 15 minutes.
Once I get a B&W G-3 (none too soon, due to $ constraints) or its temporary substitute online as a plotter server, I can just set the screen to blank after 3 or 4 minutes, it doesn't take long to get a job rolling, so I don't need the monitor any longer than that.

Whatcha think, gang?

The pop/zooms will only get worse and worse as the flyback degrades. Eventually, the monitor will perform several of these "arcs" per minute. This should be considered a hazardous state and the monitor immediately retired if it gets that bad.

 

[Trash80toHP_Mini]

What's a flyback? (transformer?) Why should they be so hard to replace? This POS will be MINT . . .

. . . after I polish the scratches off the top edges of case!

 

[Trash80toHP_Mini]

Since we're supposedly a family/youth friendly military organization . . . :

. . . .and, as a mod, I've been setting a very bad example of late . . . :I

. . . let me suggest a new acronym for the 68Kmla LEXICON . . . [] ]'>

POOM . . . Piece Of Organic Material! [] ]'>

 

[Unknown_K]

You must be thinking about the original Wallstreets because the rev 2 models did fit the whole screen in 640x480 and 800x600 modes on the LCD (you were stuck with 1024x768 on the original).

Thy why does my originally 266MHz w/66MHz bus PowerBook G3 that I later dropped a 300MHz CPU into keep the res 1:1 with the physical pixels?(black borders)Come to think of it I am not sure if I ever tried lowering the res in anything other than a couple games that it played very badly.

To be fair I have no idea if the logicboard was ever replaced. All I know is that it came to me with a 266MHz CPU and 4GB HDD so matches PDQ specs more than WS specs..

You probably have a rev 1 board (they will work with the 66mhz bus speed chips). I think the originals have rage LT video chips while rev2 have rage 3d (might be a difference in VRAM size as well). The originals had sloped plastic on both sides toward the clasp, rev2 had a cliff on the top section.

Many people swapped parts and displays over the years so you have no idea what exactly you have and if it is factory stock.

 

[Osgeld]

What's a flyback? (transformer?) Why should they be so hard to replace? This POS will be MINT . . .

. . . after I polish the scratches off the top edges of case!

The flyback transformer (FBT), also called a 'line output transformer' (LOPT), is a special transformer which is used to generate high voltage (HV) signals at a relatively high frequency.

They can be replaced, but be warned you need to replace the faulty unit with one identical in spec or nastys will happen, also since they are the generator of some seriously wicked HF High Voltages (20 - 50 KV) they can flatten you before you can say snot

Often times replacements are more expensive than the screen, and usually not an option unless you happen to have another sitting around with the exact same transformer and something else wrong (ie bad tube vacuum)

http://en.wikipedia.org/wiki/Flyback_transformer

 

[Mycatisbigfoot]

just look on kiji for a nother imac, just plop in the hard drive and done, no changing transformers, if you do somthing wrong you are DEAD

I just got a g4 and that replaced my g3 imac that is dying

 

[Trash80toHP_Mini]

The flyback transformer (FBT), also called a 'line output transformer' (LOPT), is a special transformer which is used to generate high voltage (HV) signals at a relatively high frequency.

They can be replaced, but be warned you need to replace the faulty unit with one identical in spec or nastys will happen, also since they are the generator of some seriously wicked HF High Voltages (20 - 50 KV) they can flatten you before you can say snot

http://en.wikipedia.org/wiki/Flyback_transformer

Thanks for the link, and the warnings about safety and price, guys! I've worked on High Voltage Systems before, but I think I'll wait for TomLee to chime in before making any final decisions.

I can usually source even ancient Apple Replacement Parts that are not normally available to the general public . . .

. . . because I don't ask very often and only for a part whose replacement is VERY labor intensive. [] ]'>

 

[Mike Richardson]

The Flyback is not a direct "Apple Replacement Part". The only thing close, would be the entire analog board as a service part. Any old stock has probably been depleted or recycled by now.

Additionally, since this is the main failure for these displays, most of the "bad" ones you'll come across have the exact same issue. The tube almost never goes bad, unless the display is dropped or otherwise damaged.

 

[Trash80toHP_Mini]

The flyback transformer (FBT), also called a 'line output transformer' (LOPT), is a special transformer which is used to generate high voltage (HV) signals at a relatively high frequency.

Thanks for the link, and the warnings about safety and price, guys! I've worked on High Voltage Systems before, but I think I'll wait for TomLee to chime in before making any final decisions.

Well, I'll just have to call a couple of EEs I know who've been involved in SERIOUS MacHackin' since the 128! [] ]'>

The Flyback is not a direct "Apple Replacement Part". The only thing close, would be the entire analog board as a service part. Any old stock has probably been depleted or recycled by now.
Additionally, since this is the main failure for these displays, most of the "bad" ones you'll come across have the exact same issue. The tube almost never goes bad, unless the display is dropped or otherwise damaged.

NoPro, I can probably source/or get a spec & source for the requisite parts . . .

. . . they may even have a usable analog board lying around! [] ]'>

_______________________________________________________

Come to think of it, has anyone ever researched the availability of newer analog boards from other mfrs. This particular CRT had to have been used by several mfrs. One of their ABs might be of a usable size/shape etc. What was the last monitor mfd with this CRT? [] ]'>

p.s.mode>_______________________________________________________

 

[Mike Richardson]

I believe it is a Mitsubishi Diamondtron CRT, but I don't know if you can just yank one out of a Mitsubishi model or not. And again - there's a good chance that the Mitsubishi has the same problem!

The most common cause of failure of these blue displays (and most likely the Mitsubishi sibilings) is the flyback.

 

[Osgeld]

the best way is to look at the thing and get anything written on it

 

[AdeptRapier]

Hello!

Ahh, a person after my own heart! Here is the state of my current "Mac OS 9 Machine"...

Blue & White G3 (revision 2 motherboard)

PowerLogix PowerForce G3/1.0GHz with 1MB L2 CPU Upgrade

1 Gig matched Ram

3dfx Voodoo 5 video Card (64 megs)

PCI SATA controller with 320 GIG Sata Drive attached (for files)

250 GIG ATA Drive 7200 rpm (OS boot drive)

Wired 4 DVD PCI Dvd playback card

Creative Soundblaster Live audio card

Pioneer Superdrive

Matias Tactile Pro Keyboard

I have pieced this thing together over about a year or so and I really love the hell out of it. The Voodoo 5 is a kick in the ass with old games, and with the PowerLogix upgrade, you can control your CPU speed via a software control panel which make playing old game GREAT and EASY since you can just dial down the speed if the game plays too fast! I also have a great time with streaming internet audio piped through the Creative Soundblaster live. This card got some pretty crappy reviews (mostly due to a lack of OS X drivers), but if you get the last software update and use it under OS 9 it is a real fun experience with lots of audio tweak options. And lastly, the Wired 4 DVD card will output your dvds in surround sound if you hook it up to a compatible receiver. Pretty slick for OS 9 huh!

Is it just me or don't the old machines that have been upgraded like this one just SCREAM in OS 9 compared to the new Macs in OS X?

Like I said I really love this machine!

Anyways, just my two cents. Have a good one!!!

AdeptRapier