MDB Ventures

A new home for specialized collectors.

Rare, Vintage, Industrial, Ham, Radio and Audio vacuum tubes for sale.
We have over 100,000 collectible items for sale, and our inventory is growing daily.

Our master list of tested new and used vacuum tubes
Our list of non-cataloged (untested) vacuum tubes


Gmail Users
Please read this note about incorrectly declared email as spam.
This can be an issue as well with other free email providers like Hotmail, AOL, and Yahoo.


Current Sales Promotion

Spring is here! Time to clean out the storage lockers, the garage, the basement, the attic, the crawl space, the barn, and the dog house!
Spring Cleaning Sale Special!!!

Buy one manual, book, record, radio part, computer part or bargain bin item and get a second item of equal or lower value FREE!
(No, the second item does not have to be the same type of item.)
This sales promotion does not include our regular tube listings or equipment (testers, radios, amplifiers, etc).
-- Items on these pages are available for the discount --
Video, Books, Magazines, Manuals and Documents
Antique Records
Antique Radio Parts
New/Used Computer, Parts and Software
Bargain Bin Packs
Bargain Bin Items

Want to save more?
If your order totals $50.00 or more, there is no handling charge for the order (just regular postage).
If your order totals $200.00 or more, get a 10% discount.

This will be calculated automatically.
You don't need to do anything except place your order.
This promotion will continue only until MDB Ventures management decides to end it. So, order soon and get a significant discount on the items you need.
Click here for Additional Rules governing the use of MDB Ventures discounts


-- New! --

Antique Meters

Tube Testers

-- Antique Records --

Car Radio Schematics and Service Manuals

Rare Swag

New/Used Computer, Parts and Software

-- Atari 520 ST Computer --


On a budget?

Check out our Bargain Bin Listings

Save on Discount Bargain Packs

Free! (broken tubes)

Large Quantity
Boxed and Loose
Tube Lots



Tube Listings

Vintage Preoctal and Globe/Balloon

Industrial, Ham Radio, Transmitter and Power Tubes

Collector Tubes

Audio Tubes

Radio and TV Tubes

Miniature Radio Tubes

"G" Style Radio Tubes

Battery Radio Tubes

Space Charge Low Voltage Tubes

Loktal Radio Tubes

Compactron Tubes

Display Tubes,
Eye Tubes, Photocells, CRTs and Nixies

Nuvistor, Subminiature, Acorn and Rabbit Ear Tubes

Delay Relays

Projector Lamps

Radio Ballast Tubes


Descrete Solid State Devices


Tube Testers

Used Electronics
(radios, amplifiers, etc.)

Antique Radio Parts

Unusual, Miscellaneous
and One-of-a-kind Items

Tube Caddy listings


Video, Books, Magazines, Manuals and Documents



Master Tube List
(all cataloged tubes - sorted list)

Non-Cataloged Tube List
(untested tubes - sorted list)



Our Library of Information
Electron / Vacuum Tube Information, Tube Testing Information and Lots of Other Useful (and not so useful) Information

About Our Vacuum Tubes

About MDB Ventures

Shipping Information

MDB Ventures Policies

Useful Links to Other Sources




Gmail Users
Please read this note about incorrectly declared email as spam.
This can be an issue as well with other free email providers like Hotmail, AOL, and Yahoo.



Links: eBay --- Google --- Yahoo ---

Bing --- Knight Software --- Backwater



Contact MDB Ventures
Portland Oregon USA
sales@mdbventures.com

Having trouble? Try
sales@fourwater.com

31 March 2019