NOS EL84 (6BQ5) Tungsram matched quadrate vacuum tubes

We have NOS EL84 (6BQ5) Tungsram matched quadrate vacuum tubes.

Freckles on the tube side are not burns,
but they are magnesium fall-outs originated during manufacturing.

Made by Tungsram (Hungary).
Packing : OEM.

(The 100 pieces packing set in the picture is only a sample, demo).

The  NOS EL84 (6BQ5) Tungsram vacuum tubes have been checked

by a calibrated Hickok 539B vacuum tube tester.

By the operating manual of the tester the typical value
of the MC (Mutual Conductance) of the NEW EL84 (6BQ5) vacuum tube is : 8.475.
This is taken as 100 %.
On each tube I placed a little white sticker with the measurement results.

MUTUAL CONDUCTANCE TEST: here we can get exact
numerical value in micromhos.
The condition of TUT (Tube Under Test) can be expressed in percent.
For example : in case of NEW EL84 (6BQ5) the listed typical
value of mutual conductance is 8.475 micromhos.
If the TUT has 11.000, the percental condition is
(11.000 / 8.475) x 100 %  =  130 %.

Result of the mutual conductance test, as follows :

TERMS:

Each tube has been packaged in two layers by use of air insulating
wrapping paper.
So packaged tubes are housed in an international standard size box.
We use foam inside the box to preserve the tubes against bumps.

Method of payment is : Euro or USD.

Paying method :

If you have any questions , I will answer as quick as possible.

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Last update : 2012. június 11. 00:11