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D3A nos tubes for sale

Hi Patriz,
can I ask you if it was you who opened the box that contains all the valves?
If it wasn't you, do all the individual boxes of the D3A always have a cross drawn on them? I ask you because generally the cross was drawn when the tubes were with non-standard values.
 
Yes monotube2 you are right!! If the each tube box have cross on them, than this tubes have not passed the test!! The values are not standard and this can be 20-30% of correct standard values. I buy in past about 20 such a tubes and I could only match two good pairs. So buy more to have good options for matching.😉
 
Yes monotube2 you are right!! If the each tube box have cross on them, than this tubes have not passed the test!! The values are not standard and this can be 20-30% of correct standard values. I buy in past about 20 such a tubes and I could only match two good pairs. So buy more to have good options for matching.😉
Equipment subject to planned maintenance would have the tubes swapped out and sometimes retained in the new cartons and marked as such. It is unusual to see a Siemens master pack opened 'upside down' like this, the condition of the pins can be another indicator, and as always - the price. Of course they may also be 100% new in box ;-)