Only colour flybacks work with colour CRTs, as colour CRTs require a much higher voltage. (30,000 as opposed to 3,000 volts, approximately) On May 4, 2012 8:14 AM, "mike stedman" <[email protected]> wrote:
> 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. > 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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