Music retailer dealing in amplifier tubes and parts, with tutorials on do-it-yourself amp modification and repair.

Audio electronic specialty items for professionals and hobbyists; worldwide shipping.

Audiophile audio transformers and accessories.

Vacuum tubes, tubes, electron tubes: NOS and current for the most demanding audiophile and hobbyist.

Tubes and tube related products to design and build custom amplifiers and systems.

One of the world fine art tube and valve amplifer for hifi stereo produced in germany.

Small company where the primary business is selling audiophile tube parts.

Can modify old tube or solid state equipment to sould like new using the latest components. Charges for labor time. Parts and return shipping are billed at cost. Free estimates.

High-efficiency loudspeakers for tube amps. Turntables and other electronics.

This site contains product information on Berning audio amplifiers that are in production now, as well as technical and service information on discontinued models.

An association for audiophiles in search of musical sound through hand made vacuum tube amplifiers.

Contains a very large collection of datasheets, schematics and PSPICE models,plus freely downloadable software.

Source for electron tubes and valves. Free members area with more than 3500 specs and substitute.

Importer of premium european vacuum tubes direct from the manufacture.

Audio transformers, transformer materials, parts and accessories for tube amps.

Information, and pointers to information, for builders or otherwise tinkering with vaccuum tube amplifiers.

Netherlands source for tube information and sales of NOS tubes; Philips and Telefunken.

How to build the 18 Watt all tube guitar combo amplifier. Images, blueprints, tips & tricks.

Manufacturer/distributor of vacuum tubes and vacuum capacitors for audio, broadcast and military applications.

Online store that offers radio tubes for Hi-Fi, Hi-end, amateur radio.

Repair, modification and restoration of vintage, vacuum tube audio equipment such as tube amplifier.

Spanish connection for tubes and valves

Manufacturers of tubes, capacitors for high-end audio amplifiers. Base in Slovak republic and Canada.

Manufacturers of high end electron tubes Svetlana 300B and Svetlana EL509-II.

Information about tubes. Tube datasheets, tube schematics, tube code explanation, tube sales, and tube schematics explained.

Makes tube audio transformers such as air-gapped and parallel feed single-ended transformers.

Digital tube testers for matching and testing power pentode vacuum tubes used in musical equipment amplifiers.

Devoted to vacuum tubes world applied to audio science. Consulting, design and engineering in audio. Power amplifiers and Hi-End oroducts.

Small online store of tubes parts.

Sowter Audio Transformers (E A Sowter Ltd)

Importer and distributor of high quality hi-fi parts: Lundahl, OEP, Riken, SCR. Located in Italy.

Audiophile, antique, radio, TV, and industrial types of vacuum tubes. Also an online garage sale and a complete list of audio editing and restoration services.

Supplier of all types of tubes, speakers, sockets and tube amplifiers.

Answers the question, "What's so great about tubes?" "Must read" for those getting started in thermionics.

Taiwanese supplier of audio parts and DIY kits.

Tubes and parts for Hi-Fi, radio, guitar; tube data and amp schematics.

A site devoted to vacuum tube fans. Buy, sell,and trade vacuum tubes. NOS vacuum tubes listed for sale.

Manufacturer of high end tube audio electronics, including the Gain Ryder 3 compressor.

Transformers power supplies and related equipment for audio equipment. Also EL inverters and magnetron transformers. Company is located in England.

UK-based tube supplier. "Digitally matched and graded valves for the music industry."

Joe Roberts' web site. Many links.

Manufacturers of vacuum tubes such as NOS Tungsram audio tubes.