Adjusting R8 to Increase HP-97 Printer Intensity

[Dave Frederickson]

(02-18-2021 10:03 PM)[kby] Wrote:  

(02-17-2021 06:11 PM)Dave Frederickson Wrote:  *EDIT: On second thought, it's not contact bounce as the wiper has multiple contacts. The issue is corrosion which can cause momentary open circuit conditions. This is exhibited commonly as a scratchy volume control or brightness control. Consequently the makers of DeoxIT have something called Fader Cleaner that worked wonders on my 82912A's brightness and contrast controls.

Oddly enough, Caig doesn’t recommend fader lube for conventional pots and I’ve had issues with it. The doc says it’s only for plastic-based controls, not metal & carbon. Their actual recommendation is meter squirt or two of D100; for my old audio equipment i ‘very found that usually works better in conjunction with a cleaner. The F5 fader lube seemed to make things worse (although with no long-term damage).
-kby

[My turn to edit: it looks like the product literature for the fader series now includes carbon pots, but it’s not updated in the bulletin which stills says d100 usually works best:
https://acct113328.app.netsuite.com/core...a&_xt=.pdf
]

Thanks for the tip.