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Monday 10am - 9pm Tuesday 10am - 9pm Wednesday 10am - 9pm Thursday 10am - 9pm Friday 10am - 9pm Saturday 10am - 9pm Sunday 10am - 6pm

Tubes Unlimited

Home
United States
Houston, TX
Tubes Unlimited

Vacuum Tube Supplier for Audio Hifi and Guitar Amplifiers Our selection of audio vacuum tube types are as BIG as the Lone Star State! We ship WORLDWIDE!!!

Easy and Safe, 100% Secure Online Ordering for all of your Vacuum Tube needs! Some of the Rarest NOS audio vacuum tube types you will see online!! Highest Quality- We specialize in Rare, High Quality, NOS audio vacuum tube types! We 100% Test each vacuum tube to assure you the best quality possible! Ultra-Safe Packing- All vacuum tube orders Professionally Packed For Safe Arrival! Super Fast Shipp

ing- Most vacuum tube orders shipped same day! If you are looking for any kind of NOS audio vacuum tube like 12ax7 12AT7 12AU7 5751 6L6GC 6V6 E188CC 6DJ8 6922 E88CC 6SN7 etc we probably have the vacuum tube you are looking for! We specialize in the rare, high quality NOS audio vacuum tube brands like Mullard, Telefunken, Brimar, GEC, GE, Sylvania, RCA and more! Check out our huge variety of all audio vacuum tube types! Each vacuum tube we sell is completely tested for shorts, gas, leakage, and transconductance on our "unforgiving" calibrated Hickok 118B cardmatic vacuum tube tester. Also, check out our wide array of NOS 12ax7 vacuum tube products and drop in replacements for the 12ax7 like our GE JAN 5751. If you need a matched pairs of a 12ax7 vacuum tube, we have them from Telefunken 12ax7, GE 12ax7, RCA 12ax7, Brimar 12ax7, Sylvania 12ax7 and more! We also carry RCA, Tung-Sol, Sylvania, GE, Raytheon, JAN, Mullard, Genalex, Philips, Siemens and other vacuum tube brands. If you don't see the type of vacuum tube you are looking for then email us! We have over 4000 NOS audio vacuum tube types in stock!

06/05/2026

Ham Radio Tubes: Complete 2026 Vacuum Tubes Guide for Amateur Radio Applications

Complete guide to ham radio tubes for amateur radio amplifiers. Expert tube selection, testing, and matching advice from 45 years vacuum tube experience.

06/04/2026

Vacuum Tube Basics for Beginners: Simple Introduction

Master vacuum tube basics with this beginner's guide. After 45 years using tubes, we explain how they work, their types, and what actually matters when selecting quality tubes.

06/03/2026

Diode Vacuum Tube: The 1 Foundation Everyone Forgets About

The diode vacuum tube is where everything started. After 45 years, here's why this foundation matters more than the sexy tubes everyone obsesses over.

06/02/2026

Military Vacuum Tubes: Defense Applications in 2026

Military vacuum tubes power radar, missile guidance, and defense communications. Learn why specifications matter and how to source authentic military-grade tubes

06/01/2026

Why Do Tubes Sound Better? The Science of Harmonic Distortion 2026

Why do tubes sound better than solid-state? The science of even-order harmonics, soft clipping, and tube warmth explained by 45-year audio veteran.

05/31/2026

Vacuum Tube Theory: Complete Physics and Operation Guide 2026

Here's your 160-character meta description with exact keyword placement: Master vacuum tube theory fundamentals: thermionic emission, transconductance, amplification factors. 45 years experience explains what makes tubes work

05/30/2026

Vacuum Tube Circuit Design: Beyond the Textbook Schematics 2026

Vacuum tube circuit design beyond textbook theory. 45 years of real-world experience with component selection, biasing, and layout decisions.

05/29/2026

811A Tube: The Classic Ham Radio Power Amplifier

Why the 811A tube dominates ham radio amplifiers: expert guide to specifications, grounded-grid operation, troubleshooting, and sourcing quality NOS tubes

05/28/2026

Radiation Hardened Tubes: Why Tubes Survive Nuclear Events 2026

Radiation Hardened tubes survive nuclear EMP and radiation that destroys semiconductors. Military-proven technology for critical systems. 45 years expertise

05/27/2026

Klystron Amplifier Technology: High-Power RF That Solid-State Can’t Touch 2026

Klystron amplifiers generate megawatt RF power that solid-state can't match. Why particle accelerators, radar, and satellites still depend on vacuum tube technology

Address

6527 Kury Lane
Houston, TX
77008

Opening Hours

Monday	10am - 9pm
Tuesday	10am - 9pm
Wednesday	10am - 9pm
Thursday	10am - 9pm
Friday	10am - 9pm
Saturday	10am - 9pm
Sunday	10am - 6pm

Website

http://www.nosvacuumtubes.net/

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