You could also consider Goldpoint attenuators. They use high precision 50 ppm 0.1% resistors and have balanced as well as single ended products.
If you want a special curve or ladder network, contact Arn Rotecap (he's the owner) and he might build something to your specs.
http://www.goldpt.com/index.html
If you want a special curve or ladder network, contact Arn Rotecap (he's the owner) and he might build something to your specs.
http://www.goldpt.com/index.html