Dried up Ferrofluid?
Is all ferrofluid the same or is there different types? I would use this one from Parts Express (audio parts specialist) you'll know it'll be good quality. https://www.parts-express.com/ferrofluid-100ul-general-purpose-for-1-diameter-vc--340-540 Cheers George |
Guess I’m officially a cheapskate. I made my own ferrofluid. I have a bag of ferrite cores I bought for making coils. I used a smooth knife sharpening stone and ground the ferrite core into a fine powder. I used 30 wt Mobile 1 synthetic oil. I mixed the powder into 1 ounce of the oil until it was dark like strong coffee. Then I let it sit and settle overnight. The big particles settled to the bottom. Then I poured the clean ferrofluid into a clean glass bottle with a tight cap. I used an inkjet refill kit syringe to inject the fluid into my dome tweets and midranges. BTW, that was 17 years ago. Mobile 1 is more stable than regular ferrofluid oil; it has heat stabilizers, antioxidants, detergent, in its additive package. Probably time to check my drivers and do a refill. Also, I used contact cleaner to FLUSH OUT the old ferrofluid. Paper tape will not remove all the old gunk. |
quincy196 posts03-14-2020 12:44pmThank you George! 👍 And if not old enough yet or sounding ok, just like doing preventative maintenance. I used contact cleaner to FLUSH OUT the old ferrofluid. Paper tape will not remove all the old gunk.I think even petrol would be fine for the magnet gap, but anything on the voice coil something milder as the coil insulation lacquer needs to be looked after. Cheers George |
