Welcome to KCA NOS & New Production Tubes

We are closed until September 25th. Online ordering is available 24/7 and low stock items will be sold to the first buyer. All orders will ship on September 25th.


High Quality Audio & Guitar Amp Tubes since 1997

Online Tube Catalog

Visit our online store for easy ordering of NOS and new production vacuum tubes. Choose from names like RCA, Mullard, GE, Philips, Amperex, SED (Svetlana Electron Devices), Sovtek, JJ, Tung Sol (NOS and Reissue) and Electro Harmonix.

Amplifier Repair & Modifications

We specialize in amplifier repair and guitar amplifier modification of vintage, hand wired tube amplifiers. Fender and Marshall amps are our focus.

Online Resources

Browse tube and amplifier FAQs, tube substitution guides, user reviews, amplifier tube layout diagrams and other useful tube/amplifier information. Sitemap

Your best source on the web for Guitar Amplifier Parts and Guitar Amplifier Tubes!