This thread is about PRAM batteries. The native 3400/Kanga PRAM battery is NiMH, not li-ion.

Ah, well ... The native PB 3400c/Kanga battery is LiIon, not NiMH. AichEss

For the record, if anyone buys the PB 3400c/Kanga NiMH battery replacement, black is positive and red is negative: in addition to switching the connector you will need to reverse t…

No strange sounds! Hope the glass is still OK!

Inside the Widget is a glass scale used for head position feedback.  The scale is attached with glue and 30 years later on many Widgets the glue has failed.  This  commonly results…

I think it might be because the disk isnt getting up to full RPM? I know the servo controllers of HDDs are smart enough if it senses a problem with spindle speed, the rest will han…

Yes. This is not going well. Sometimes the brake releases, but after that not much happens. I'm not sure if this disk will work ever. But I will try it on a Lisa one day. That wil…

On your video, I never hear the brake release. After the drive comes to speed - about 5 seconds or so, you should hear a "clunk" as the brake releases and then the drive should sta…

Hi,  I have some. Send me a P.M, if you still need one. Take Care,

Is this better: youtu.be/CTNr0uAiWwk Or

Got a link? Embedded videos aren't working, apparently. c

OK. Here is a movie from still to running.

No. the wind up of the drive. You did a video on the drive already running.  would like to see one from non-powered, to powered up and spinning. 

@techknight Do you mean a kind of roundup?

Would like to see the "wind up" from a dead stop.

Anyone on this? Could I test the analog board and monitor with a Mac motherboard? Or else?

Awesome! Spin spin spin!

OK. Started for a second and third time. Now it is running for an hour. I will let it run until I go to sleep. I should fix the power a bit. Use some ductape( yes techknight...goo…

If you get it going again, let it run for a while, especially in different orientations. Apocryphal tales say that ProFile drives that screech like a banshee "get better" after ru…

First BIG Success!!!! I got it spinning! Just by rotating it counterclockwise for some time. I could feel it rolling better and better. Then I switched on power and it started run…

Keep turning it by hand until that old sticky grease has softened enough for the drive to turn on its own?

Some improvement! I disconnected the power to the engine and reconnected. Now the disk will try to spin. It moves 0.1 inch and stops(counterclockwise). I have turned the engine s…

OK i will try to help the disk spin. Should I turn clockwise or counter clockwise?

Mine had the same problem. Many years of no use meant the bearings were stiff. You applied power and quickly gave the spindle a little twist before the motor drivers burned out. I …

the spindle motor may have hardened grease in the bearings.  I just recently ran into this problem with a pair of 5 1/4 floppy drives on my IBM 5155. I had to press-out the hubs a…