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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!

06/19/2026

NOS Vacuum Tubes: Complete 2026 Guide to New Old Stock Tubes

Stop buying fake NOS vacuum tubes. Learn what NOS actually means, how to spot counterfeits, and why vintage tube quality matters. 45 years of real-world tube expertise.

06/18/2026

Power Vacuum Tubes: Complete 2026 Guide to High-Power Amplification

Expert guide to power vacuum tubes: critical differences between audio/transmitting types, professional testing methods, NOS quality. Real-world experience.

06/17/2026

5U4GB Tube: Why Classic Tube Rectification Still Matters

Learn why the 5U4GB tube creates authentic vintage guitar amp tone. Voltage sag characteristics, NOS quality differences, and professional installation guide.

06/16/2026

Pentode Tube: Complete Guide to 5-Element Power Amplification

Stop treating pentode tubes like simple power upgrades. Learn why the screen grid and suppressor grid matter, how pentodes actually clip, and which tubes fit your amp

06/15/2026

Magnetron Tube: Complete 2026 Guide to Microwave Generation

Magnetron Tube technology powers industrial microwave systems worldwide. Learn how these vacuum tubes generate kilowatts of microwave energy efficiently.

06/14/2026

Thermionic Valve: Understanding the 1st British Term for Vacuum Tubes

Thermionic valve vs vacuum tube? Same device. British vs American terminology creating unnecessary confusion. 21 years answering this question—here's the truth.

06/13/2026

Vintage Vacuum Tube Collecting: The Definitive 2026 Beginner’s Guide

Vintage vacuum tube collecting: Beginners Guide for 2026. Learn from vacuum tube expert with over 45 years experience the best way to buy and collect vacuum tubes.

06/12/2026

LINAC Vacuum Tubes: The Technology Behind Radiation Therapy 2026

LINAC Vacuum Tubes generate megawatt microwave power for cancer treatment. Why radiation therapy still depends on klystron technology in 2026

06/11/2026

Radar Tubes: Technology Powering Modern Radar Systems 2026

Radar tubes- essential in modern military and commercial radar. Learn why magnetrons, klystrons, and TWTs dominate high-power radar and solid-state alternatives fail.

06/10/2026

Rare Vacuum Tubes: Collector’s 2026 Guide to Valuable Tubes

Rare vacuum tubes worth real money in 2026. Western Electric 300Bs past $1,000, Telefunken ECC803S at $500+. Pricing, authentication, and counterfeits.

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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