Amperex ONE (1) 6DJ8 AT1000 TESTED Vacuum Tube HP Selected Heerlen ECC88 dual triode 1962-1973

This listing is for one (1) Amperex-made 6DJ8 ECC88 dual triode vacuum tube in the standard tube shape. It has a B9A 9DE noval 9-pin base, grey plate, and halo or dimpled disc getter.

Selected for HP or BT Labs by Amperex or tested by Tektronix. These are T3 T4 or T5 made in Heerlen, Netherlands with the Heerlen triangle etched in the glass. SoundByDoc has classified five main types of Heerlen ECC88: T1 (1957): Ultra rare pinched waist, D getter. T2 (1958-1959): D getter GA0 GA1 GA2 code. T3 (1959-1962): Large halo getter GA3, GA4, GA6, and some GA7. T4 (1962-1968): Small halo getter GA7, GAA, GAB, GAC. T4bb: same as T4 but with at least some of the bugle boy logo visible. T5 (1965-1972): Orange Ink, Dimple Getter, or A-frame getter support (any or all of these qualities makes it a T5).

Your tube has been fully tested on a computer-regulated, USA-made Amplitrex AT1000 on Fixed Bias setting with used good results. It has also passed shorts and gas tests. The tube might have mechanical wear or have the label rubbed off - these are very old! Tubes that test like new (tNOS) are available in a separate listing. Every tNOS or Used Good tube you receive from Sound By Doc is guaranteed against failure for 60 days after purchase, an industry extreme!

OPTIONS (use offer feature in Reverb):

Want a regular white box? $1 extra per tube
Want a tube that's packed in its original box? $3 extra per tube
Want the test results recorded on your box, too? $3 extra per tube