Being Plugable doesn’t sell spare power adapters for UD-3900, please suggest where a compatible power adapter can be purchased. I have the UD-3900 power supply specs BUT cannot find a vendor who sells it online.
Thanks for posting here! As the failure of this product is so very low (less that 0.001%), there is no demand to justify selling power adapter as a separate product.
That is the reason other vendors are also not carrying it and we cannot point you to a source that sells the exact same power adapter.
Sorry about that!