Comments on Profile Post by bobboxbody

I was also told recently that most tubes will test within 5-10% of their original conductance/emission until they're about to die and it doesn't tell you much about longevity

nice find, what getter? and AK??

@caute not sure about tube construction - AK is AudioKarma, there's a subscriber's section that has some great deals. Here's a pic of the tubes(the bugle boy also tests high and was included in the deal but has no match)
https://i.imgur.com/aPhjlZ7.jpg

I messed up the dates, the orange printing pair is 1968, the bugle boy is 1963

yeah I was ab to say, if you see orange (or worse, green) on an amperex, or any tube really, it means a later than mid-60s mfrd date. you want white lettering fs. looks like a non-a frame getter, which is also a good sign, for the 6922s.

as a gen rule of thumb, the earlier the tube, the better, lotsa ppl will try to claim Siemens over telefunken or CCA or btfo or pinched waist/7308 amperex or just die, but really, you just want an early 60s 6DJ8.

they were created by Phillips in '58, but you won't find any of those around. matching isn't *that* important in a DAC/preamp as it would be in an amp or power section, but nice to have fs.