Vacuum Tube Snake Oil Salesmen

Which Maxi did you use to test 2A3s?

I have a Maxi power tube tester with a regulated power supply. I am forced to test all the tubes which I am trying to match at the same time due to variations in test results which can occur if the same tubes are tested days apart. 

I calibrated 2 Hickok 539Cs and after both were properly calibrated the test results of the testers routinely varied by up to 12%. To make matter worse each tester can be idiosyncratic as to which tubes it tests higher than normal and also lower.  

So the 65 and 43 ma results are meaningless unless you know details of the testing particulars of each tester. It is possible that you could vary up to 10 ma from Maxi to Maxi.

It is a serious mistake to abandon tube gear due to the actions of a few bad actors. 

Here is the PSVANE 2A3C data that I found:- (I believe it is quite different from the previous post).  Anyway, some tolerance will happen but it is more important both tubes are matched with the same reading.

DC Parameters
Ua………………………… 300 V
-Ug………………………… 45 V
Ia………………………… 60 mA
Gm………………………… 5.25 mA/V
ri………………………… 0.8 k
u………………………… 4.2
Pout…………………………3.5 W

@calieng  to @tuberist Aren't Ray tubes just relabelled Psvane or other manufacturer like TAD and Groove Tubes do?

Although I expect they are tested and selected for the best of the bunch.

Exactly.  While Ray Tubes may not want people knowing this and PSVANE is not advertising this, however the idea is the better testing tubes with a different label, better packing, backing, support, is also what you are paying for - hopefully so.  

They've only been out a year or so, need more time to know if they are truly better or not.  Meanwhile I keep a few sets and spares of standard PSVANEs. Will know more in the next few years if the production runs since the pandemic are truly better or not.  

Reading this thread i almost regret the purchase of the very good low cost Douk T8 pro as  tubes pre-amp/E.Q.

It work well since almost a year now...

It improve the Edifier active speaker ...I use it as  tube pre-amp for the Fosi SK1 with my secondary headphone, the sextett ...

I vouch few years ago to never buy tubes again... I lied to myself or i forgote my promise...

Anyway the Douk cost peanuts and is very good for a low cost system...

My sound experience is more analog than digital....

@larsman ​​@ghdprentice ,

Ah, yes my friends, both valid points.

I broke my own rule by hastily posting.

I should have written: "In my experience" I’ve had nothing but good luck in years of buying exclusively nos tubes from reputable dealers.