Vintagehifi.dk

KlausM skrev:https://speakerrepairshop.nl/en/ferrofluid/ferrofluid-1-cc-for-tweeters/a-4597-30

haflermicro skrev:Tak for al feedback!

Kan man overhovedet rode med den slags uden at ødelægge noget...det er jo sarte sager.
Altså adskille, udrense og samle igen...det er jo surt hvis baby dør i processen.

/Jesper

Dqx500 skrev:Nogle typer ret enkle. Jeg har skiftet olie på mine KEF 104/2, og repareret nogle B&W diskanter, og her er der gode styretabs der sikrer korrekt montering.
Jeg har også et par Dynaudio MSP-80 med D28 som jeg går og lurer på at servicere, men foreløbigt spiller de i garagen, og så lige et par JBL 18ti. Godt at et rør med olie rækker langt

Ferro fluid for compression driver voice coil gaps, ideal for replacing contaminated or dried ferro fluid. Supplied in a capped syringe with an applicator nozzle.

Ferrotec's APG S11N Ferrofluid is a member of Ferrotec's family of APG S Series ferrofluids for tweeter and compression driver applications. The APG S11N is a black-brown viscous fluid and uses a synthetic ester oil carrier liquid. Manufactured by Ferrotec in Tokyo, Japan. We purchase this in 1000ml bottles, and then make up individual 0.5ml syringes in the UK.

Specifications:

Saturation Magnetization (Ms) 220 Gauss
Viscosity @27°C 85 cP
Density @25°C 1.15 g/cc
Pour Point -34 °C
Flash Point >200 °C
Thermal Conductivity @38°C 150 mW/(m.K)
Surface Tension @25°C 32 dynes/cm
Coefficient of Thermal Expansion 7.5 x 10-4 ml/ml°C


0.5ml of ferro fluid supplied, typically sufficient for approximately 1-2 small compression drivers, or 1 larger compression drivers.

his067 skrev:Jeg faldt over dem her som sælger Ferrotec ferrofluid ti en meget rimelig pris (£5.95 for nok til en eller to enheder).

https://www.ebay.co.uk/itm/144967403442

Dette er hvad de skriver om produktet:

Ferro fluid for compression driver voice coil gaps, ideal for replacing contaminated or dried ferro fluid. Supplied in a capped syringe with an applicator nozzle.

Ferrotec's APG S11N Ferrofluid is a member of Ferrotec's family of APG S Series ferrofluids for tweeter and compression driver applications. The APG S11N is a black-brown viscous fluid and uses a synthetic ester oil carrier liquid. Manufactured by Ferrotec in Tokyo, Japan. We purchase this in 1000ml bottles, and then make up individual 0.5ml syringes in the UK.


Specifications:

Saturation Magnetization (Ms) 220 Gauss
Viscosity @27°C 85 cP
Density @25°C 1.15 g/cc
Pour Point -34 °C
Flash Point >200 °C
Thermal Conductivity @38°C 150 mW/(m.K)
Surface Tension @25°C 32 dynes/cm
Coefficient of Thermal Expansion 7.5 x 10-4 ml/ml°C


0.5ml of ferro fluid supplied, typically sufficient for approximately 1-2 small compression drivers, or 1 larger compression drivers.

I read on your American site that you offer refill ferrofluid kits for loudspeakers. I have four very old Dynaudio D28 AF 1” treble speakers which. Are in need of renewed oil. Is this something you can be of help with ?

We provide these kits for manufacturers, mostly because the minimum lot size is 600 pieces. These kits contain a specific quantity and specific type it is always matched to specific drive unit. We make then on request, so we don't stock them. We also don't know which specific type Dynaudio uses for which specific drive unit. And they buy a bunch of different types from us. My best guess is that the D28AF uses a low viscosity ester based APG type, and the filling volume must be something like 160 µl, this is given in the data sheet. So in total you need 0.64 ml.