I am wondering if anyone would be interested in buying replacement battery door latches for the hP Classic (35, 45, 55, 65, 67) type calculators. I recently have purchased a used one and it had one door latch snapped off. I think I can make these. I was just wondering if there was anyone else who might be interested if I start fabricating these parts?
All latches are broken in both my HP-35 and HP-45. They stay in place though. Anyway, I'd be interested in four, depending on the price. The rubber feet should be reused.
I rebuilt the HP-35 battery pack:
I partially rebuilt the HP-45 battery pack (the case is missing). I wasn't able to find your your packs at eBay.
Now, I would be really happy if someone started fabricating replacement Voyager bezels. I have a very good HP-16C, except for the aluminum bezel...
Regards,
Gerson.
I have a bunch of battery doors, with latches, but the retention part of the latches are missing so that they can fall out of the door when the door is not installed.
Not a big deal really but I would consider buying latches that will stay in place.
Couple of other things you could make now that you are a plastics man:
(1) Classic charger cord with plug.
(2) Clear plastic Classic housings - the back side, so the mainboard is visible.
Cheers,
-- Dan
I looked at the latches and they are pretty simple design. I think I could likely CNC mill these out of some type plastic rather than molding them. I will have to look to see what I can get in black. alternatively I could mill them from bronze, or aluminum.
I do not currently have capacity to press an entire back of a calculator. I will look into what I would need to do to make these however.
Also I have kits for a Classic battery repair. These include new pair of molded plastic covers with a set of new Nickel battery terminal straps that you would weld to the batteries. Contact me at dsmail@earthlink.net if interested as this is not in the classified ad section.
Hi Don,
Thanks for offering. I had tried to make them out of various things that I had around the house (my last attempt was cut up credit card parts attached with a staple) but nothing worked very well. Anyway, I'd be really happy to get 4.
Thanks again,
-Jonathan
I'd buy one. Also, to chime in with the suggestions made by some others for other useful parts: I'd also be very interested in something that lets me charge a Classic battery pack outside the calculator, without having to take the pack apart (I do that for charging the batteries for my HP-25, but that pack is a lot easier to take apart!).
- Thomas
HP made such a product called the external charger. I was a small package just larger than the Classic battery pack and the normal 82002A charger plugged into a connector on the bottom just like the ones on the calculators. i've seen acouple recently on ebay for auction but I do not know the number of the item. The Museum likely has it on the collector listing of items. I think the last time I looked it said very hard to find, but I see them every once in a while on ebay as I said. Work nicely if you have two battery packs you can charge one and use the other in your calculator. I have one that I use all the time. The only strange thing about the external charge is that it does not have any HP part numbers on it. Only marking is the normal HP label on the front just like a calculator Logo plate.
I think making the plugs for these chargers would not be very difficult but the only thing is how to identify the pin sockets they used on the originals. So far I have not found the right size. anyone know what these were originally AMP's or another?
I've sold 2 of those on the unmentionable site. One was item 120119716243. They seem to be going for $40-50 now. I think they're great accessories.
You probably all have a spare machine into which you can charge battery packs. That machine doesn't have to be working. I have a dead HP21 which serves that purpose all right. And dead machines are going for less than $40. Just a simple idea...