Rare NATIONAL UNION 50 Bottom Sqaure Getter USA Made 1930s Amplitrex Tested Tube
Rare NATIONAL UNION 50 Bottom Sqaure Getter USA Made 1930s Amplitrex Tested Tube - Image 2
Rare NATIONAL UNION 50 Bottom Sqaure Getter USA Made 1930s Amplitrex Tested Tube - Image 3
Rare NATIONAL UNION 50 Bottom Sqaure Getter USA Made 1930s Amplitrex Tested Tube - Image 4
Rare NATIONAL UNION 50 Bottom Sqaure Getter USA Made 1930s Amplitrex Tested Tube - Image 5
Rare NATIONAL UNION 50 Bottom Sqaure Getter USA Made 1930s Amplitrex Tested Tube - Image 6
Rare NATIONAL UNION 50 Bottom Sqaure Getter USA Made 1930s Amplitrex Tested Tube - Image 7
Rare NATIONAL UNION 50 Bottom Sqaure Getter USA Made 1930s Amplitrex Tested Tube - Image 8
Rare NATIONAL UNION 50 Bottom Sqaure Getter USA Made 1930s Amplitrex Tested Tube - Image 9
Rare NATIONAL UNION 50 Bottom Sqaure Getter USA Made 1930s Amplitrex Tested Tube - Image 10
Rare NATIONAL UNION 50 Bottom Sqaure Getter USA Made 1930s Amplitrex Tested Tube - Image 11
, ,

Rare NATIONAL UNION 50 Bottom Sqaure Getter USA Made 1930s Amplitrex Tested Tube

$315.00

Up For Sale 1 Pc

Tube: National Union 50

Price: $315

Shipping Charges: $40

✉️ For bulk or quantity requirements, feel free to Email us at
[email protected]

Availability: 1 in stock

Add to Wishlist
Add to Wishlist

NATIONAL UNION 50 — Vintage Power Triode

Grade: Gold Series
Black base
Black Plate & Bottom Square Getter
Made in USANew In Original Box 

Up for sale is a single 1 piece ultra-premium National Union 50 power triode. This is a rare “New in Original Box” specimen featuring the desirable Black Plate and Bottom Square Getter construction, representative of the finest American tube manufacturing.

This unit has been meticulously tested on the Amplitrex AT1000 professional analyzer. The Type 50 is a legendary output tube prized by audiophiles for its unparalleled richness and musicality. This specific tube tests significantly above the “New” factory threshold, ensuring peak performance for high-end single-ended triode (SET) amplifiers.

Serial No. Test Triode Parameter Ip mAdc Result Ip mAdc % Ip Parameter Gm uMhos Result Gm uMhos % Gm
916005 Single Triode 55.0 65.8 119.6% 2100 2660 126.7%

Note: Custom duties and taxes are the responsibility of the buyer in their country.

 

Reviews

There are no reviews yet

Be the first to review “Rare NATIONAL UNION 50 Bottom Sqaure Getter USA Made 1930s Amplitrex Tested Tube”

Q & A

Ask a question
You must be logged in to ask a question Log In
There are no questions yet

Related products

Shopping Cart

©Copyright AUDIO TUBE SHOP. All Rights Reserved

Scroll to Top
What Our Clients Say
4 reviews