deskthority

May seem straightforward, but make sure everything is grounded well. I usually don't get too excited about grounding for Model F's, but it has made a difference on at least one beamspring solenoid setup I had were there was pretty excessive chatter and grounding pretty much completely took it away ...

orihalcon wrote: You might try mounting the solenoid differently and see if that changes it at all.

I can try that. I guess the chatter is primarily caused by the solenoid making the PCB and switches vibrate, causing additional accidental contacts, right? Would adjusting the solenoid timing help as well?

wobbled wrote: Adjust the voltage threshold and find the sweet spot

It was one of the first things I tried. Increases in voltage threshold reduces frequency of chatter, but it still persists. There isn't really a higher value I can sit on that lacks chatter and doesn't trigger neighboring keys.

Hi, I recently managed to acquire an IBM 3278 pre-modded with an xwhatsit controller and solenoid driver.

When typing with the solenoid on, though, I noticed that sometimes I get keys that would repeat twice. This chatter isn't limited to a single switch, and only happens when the solenoid is ...