Tubes for CAT Renaissance SL-1 Pre line level only

3 of Amperex 7308

2 of Telefunken ECC83

Check with Brent Jessee, BRENT JESSEE RECORDING HOMEPAGE (audiotubes.com)

or Andy Bouwman, Vintage Tube Services – Tubes you can trust! Providing vintage audio tubes (new old stock) to audiophiles around the world. Celebrating 28 years of technical knowledge, experience, expertise, and tubes you can trust. For a free phone consultation call 616.454.3467.

Both are respected NOS tube vendors and can give you advice on the tubes you might want.  Andy will take a little longer but many people swear by him.  Brent is also knowledgeable and has a nice selection of tubes. 

Call Ken Stevens at (585)359-2700, and ask him directly what he suggests. No one will know better than him what works best in that circuit.

You'd have to be nuts to pay those prices from Tube Depot! $249.95 and $499.95 each!