Recent content by harry

Needs some help if possible?? our Hurco cnc vmc refuses to boot , and No help is available here in the UK, or anywhere it seems! most reckon its too old?? (Really? 1993 too old?) I am concerned the Dallas rtc chip on the cpu board has expired, well it has never been replaced. ( Maybe our...

Aparently no equivalent, and no rom code available , I have been searching for a way around this , but unable yet to find a solution ,other than using a usb adapter, which are available, but these prove to be a costly solution? I was hoping to keep things near original, as possible. I replaced...

Anyone, anywhere, have a damaged or ugley!! used keyboard for a trs 80 model 2 or model 16, I don;t need the outer casing,or keys, just a working main board , the pcb on my keyboards are not working and it seems impossible to find replacement components, especially the masked rom. thanks Harry

Thanks for you help and info , I am keen to learn more about using a Gotek, I quess being old school! and now in my 70's I don't adapt easy to new ways of thinking , although I have been collecting and restoring for over 20 years now! there is much to learn in this fast changing digital...

I had hopes of getting at least one of the drives working, I have not played with a Gotek although it seems most people use this as a reliable way out! I quess the program to format a hard drive could be loaded onto the Gotek? and go from there?? I 'll have to see what I would need, should I...

Not easy, I know!! but hoping someone may have a spare working tandon 848-02 thinline 8 inch drive or a spare working pcb board ?? I am strugling to get the two drives working in a trs80 model 16 and finding a working drive would be great news. I can then attempt via floppy disk, to format...

When the keyboard was complete and connected to the model 12 both the caps lock and shift lock leds were on permently, now with just the keyboard pcb on the bench there is no responce from the two leds or any other responce or data output from any other contacts when made?

I am hoping someone may have tested a keyboard pcb form one of the big tandy machines like ..16,12, 16B , I have a model 12 which has no responce from the keyboard at all, I have removed the pcb from the keyboard , ( all foam backed contacts look good ,I have new ones, as I did expect to replace...

Does anyone have, or know of a working trs 80 Model 12 keyboard for sale ? anywhere??

Yes Bill, press fit into cage, with solder tabs both sides , and soldered connections underneath, at first glance not easy to remove, I 'll try some wick, with some luck might get it free. ..was put in there to stay!

Many thanks wrljet, for your time looking into this, I now have more info to go on, I guess the fun starts trying to find a replacement, , or something close to try. thanks again Harry

Thanks, yes my error , C32AX135 is the correct part no. the parts list you have shown shown is a much better document for ref.

Thanks for link, I also found a few details, such as max forward volts (135v) and max current of 25A , but not the gate trigger voltage and current to find an suitable equivalent? I have also recently done a parts request, for obsolete components, but not had a reply yet.

Does any one have the spec for the C232ax135 thyristor(as used in the pdp8/m psu ) or suggest an equivelant that has been successfully used? Harry.

might be helpful but not cheap! eb.y lising .....304732090946 Harry.