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Bernard Sinambela, Indonesia - Tube collection

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ID = 11574
Photo Bernard Sinambela

Below you find a part of the tube collection Bernard Sinambela.

own several old tubes, Tube testers and collecting
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Excerpt from the tube collection of Bernard Sinambela. These images (tube photos) were uploaded to the respective tubes or valves by Bernard Sinambela.

Tested as 01 tube (Ep = 135 V, Ef = 5V) with fixed grid/bias from 3V - 9V (incremental 1.5V) using amplitrex AT-1000 in PC mode.
Test results are listed below
Current ranges:
@9V   bias: 1.4 - 2.3 mA
@7.5V bias: 2.2 - 3.5 mA
@6V   bias: 3.5 - 4.8 mA
@4.5V bias: 4.4 - 6.3 mA
@3V   bias: 5.7 - 7.4 mA (minimum grid voltage as data sheet)

GM (Transconductance) ranges:
@9V   bias: 400 - 600  uMhos
@7.5V bias: 600 - 800  uMhos
@6V   bias: 700 - 900  uMhos
@4.5V bias: 800 - 1000 uMhos
@3V   bias: 900 - 1100 uMhos (minimum grid voltage as data sheet

Tube gain ranges from 8 to 10.
DL5 1926 ??
DeForest-Tubes USA

Tested higher than NOS (01 setting) using amplitrex AT-1000
Common type USA tube/semicond. USA
Sealed Box
Western Electric Company Inc... USA
Pair of Weco 221-D
221D 1926
Western Electric Company Inc... USA

Tube collector page of valve collector Bernard Sinambela as «own HP at RMorg»
As a member of Bernard Sinambela displays items in his/her tube collection. Tubes are called valves in British oriented countries.
Valve and tube collectors as well as radio collectors are invited to join Every member can display separate collections of tubes, radios etc.

Bernard Sinambela started his/her tube collection (valve collection) here on 01.Feb.2015. [index-en]