Freckles on the tube side are not burns,
but they are magnesium fall-outs originated during manufacturing.
Made by Tungsram (Hungary).
Packing : OEM.
The NOS EF86 (6267,6BK8) Tungsram vacuum tubes have been checked by a calibrated Hickok 539B vacuum tube tester.
By the operating manual of the tester the
of the MC (Mutual Conductance) of the NEW EF86 (6267,6BK8) vacuum tube is : 1.750.
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 : n case of the NEW EF86 (6267,6BK8) listed minimum
value of mutual conductance is 1.750 micromhos.
If the TUT has 2300, the percental condition is
(2.200 / 1.750) x 100 % = 126 %.
Result of the mutual conductance test, as follows :
Vacuum tubes,Vacuum tubes,Vacuum tubes,Vacuum tubes,Vacuum tubes,Vacuum tubes
Each tube has been packaged in two layers by
use of air insulating
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.
- per PayPal,
- per International Money Order,
- per International Postal Money Order,
- per Travelers Express Money Order,
- per American Express Travelers Cheque,
- per Western Union Money Order,
- per Personal Cheque,
- per Bank Transferring,
- per Cash in a registered letter.
If you have any questions , I will answer as quick as possible.
Thanks for visiting.
Last update : 2007. augusztus 13. 22:51