made in Great Britain

Date Code : B4K3,B4K9

Top ''O'' getter

Copper Post Blackburn

New in White Generic box
The Photos are actual Photos of tubes you are buying
Tested on Amplitrex AT1000 Advance Digital Tube Tester
Sr. No.1667073.  T1=Ia=1.3ma Gm=1600
                           T2=Ia=1.0ma Gm=1500
Sr. No.1686139. T1=Ia=1.1ma Gm=1600
                           T2=Ia=1.1ma Gm=1500
NOS Gm Specification
1600
1600
Tube 1 Test Results
1600(100%)
1500(93.75%)
Tube 2 Test Results
1600(100%)
1500(93.75%)

Custom duties and taxes is the responsibility of the buyer in their country

ABOUT US 

We specialized in thoroughly tested and screened quality, vacuum tubes.
We have various type of valves and tubes testers
Amplitrex AT1000 Advance Digital Tube Tester, Hickok 752a tube
tester, AVO Type 160.
We have been in the valve and tube Business
Since 1970's.
Previously we were better Known as a Wholesaler, but
recently. We are offering more retail items.
All items are tested and guaranteed, supplied.
We have Approximately 3,00,000 Valve and Tubes in Stock.