Made by Tungsram (Hungary).
Packing : OEM.
(The 100 pieces packing set in the picture is only a sample, demo).
The NOS ECC81 (12AT7,12AT7WA,E81CC,ECC801S,CV455,CV4024,6201) Tungsram vacuum tubes have been checked by a calibrated Hickok 539B tube tester.
By the operating manual of the tester the typical value
of the MC (Mutual Conductance) of the NEW ECC81 (12AT7) tube is : 3.800
This is taken as 100%.
(Given for each tube System 1 and System 2 [in Micromhos]).
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 the NEW ECC81 (12AT7) listed typical
value of mutual conductance is 3.800 micromhos.
If the TUT has 4.000, the percental condition is
(4.000/3.800) x 100% = 105 %.
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.
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Last update : 2011. március 24. 00:00