This is probably as good of a place to ask as any - which flybacks are interchangeable with the Color Classic? Can I use ones from other colour CRTs or is this a pretty one-off affair with the tiny Trinitron?
On Thu, May 3, 2012 at 11:27 AM, dale-gmail <[email protected]> wrote: > ** > hi; > > have a analog board out of a classic II. > seems to work just fine. > (motherboard went bad) > works on a classic II or classic.. > just for shipping. > > > dale > > ----- Original Message ----- > *From:* TT <[email protected]> > *To:* [email protected] > *Sent:* Thursday, May 03, 2012 11:04 AM > *Subject:* Re: Flyback Transformer > > I think my flyback transformer has finally failed. The CRT is now > blacking-out and refreshing the solder joints at P1 and the transformer has > not helped. A classic Mac repair guide by Tom Lee indicates the flyback > transformer was a poor design choice and I am wondering if anyone knows if > there are more robust alternatives. Finding a new flyback is proving to be > difficult. Would later model Mac flybacks work such as the ones for the > Classic or Classic II? Does anyone have a known good analog board that > they are interested in selling? > > Thanks, > tt > > On Tue, Nov 1, 2011 at 2:39 PM, Doug McNutt <[email protected]>wrote: > >> At 15:57 -0400 11/1/11, Charles E. Fox wrote: >> >At 02:04 PM 01/11/2011, you wrote: >> > >> >>On Tue, Nov 1, 2011 at 2:34 AM, Charles E. Fox <[email protected]> wrote: >> >>> -- Many years ago when I did TV repairs we used to apply stuff >> called >> >>> corona dope. Try Radio Shack. >> >> >> >>Interesting suggestion. I did a little more searching and read that >> >>sometimes flyback transformers can crack from overheating or aging. >> >>If the internal high voltage is creating a corona/plasma since it is >> >>exposed to air, does it mean that my transformer is still OK? I am >> >>guessing if there was internal shorting, that the part would already >> >>have gone bad. Does the corona dope need to seep into the transformer >> >>to fill voids or do I just need to seal the cracked surface of the >> >>transformer? >> >> >> >>Thanks, >> >>tt >> >> >> >>-- I haven't had occasion to use this stuff in fifty years, but >> don't think you will harm anything by applying it in the area where the >> corona is visable and letting it dry before powering up. >> >> >> >> Neat pictures. It really helps to open the dark one in something that >> allows you to play with colors and contrast. But I don't have any answers >> and it's not a cracked solder joint. >> >> Those coils, inside, are probably would with metal foil that looks a lot >> like the aluminum sticky tape that comes in a roll. It's conceivable that >> one turn is sparling to its neighbor and somehow the light is getting piped >> to the top where it gets out. But through the opaque plastic covering? >> >> The red paste looks like GE Glyptal, a paint like product that is found >> in laboratories and used for the likes of repairing small vacuum leaks and >> high voltage insulation. I wouldn't expect to find it on a new flyback coil >> especially in a hand painted blob. Someone else may have been bothered by >> the sparks. >> >> I'm staring at an SE analog board from which I have stolen parts. >> Flyback in a case like the picture 157-0042A TAI-HO Taiwan 08730 visible >> on the coil near C13. Colorado Springs. CO USA 80919. Want to try it out? >> I seriously doubt that I'll ever get around to using it. >> >> >> -- >> >> --> From the U S of A, the only socialist country that refuses to admit >> it. <-- >> >> -- >> ----- >> You received this message because you are a member of the Vintage Macs >> group. >> The list FAQ is at http://lowendmac.com/lists/vintagemacs.shtml and our >> netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml >> To post to this group, send email to [email protected] >> To leave this group, send email to >> [email protected] >> For more options, visit this group at >> http://groups.google.com/group/vintage-macs >> >> Support for older Macs: http://lowendmac.com/services/ >> > > -- > ----- > You received this message because you are a member of the Vintage Macs > group. > The list FAQ is at http://lowendmac.com/lists/vintagemacs.shtml and our > netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml > To post to this group, send email to [email protected] > To leave this group, send email to > [email protected] > For more options, visit this group at > http://groups.google.com/group/vintage-macs > > Support for older Macs: http://lowendmac.com/services/ > > -- > ----- > You received this message because you are a member of the Vintage Macs > group. > The list FAQ is at http://lowendmac.com/lists/vintagemacs.shtml and our > netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml > To post to this group, send email to [email protected] > To leave this group, send email to > [email protected] > For more options, visit this group at > http://groups.google.com/group/vintage-macs > > Support for older Macs: http://lowendmac.com/services/ > -- ----- You received this message because you are a member of the Vintage Macs group. 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