PSVANE Discussion & Impressions Thread

@alightronics - I’m not sure what is difficult to understand about this , if one types in Psvane Store on Amazon and then clicks on the individual Acme tubes only one comes up with being sold by Psvane Direct, the rest of the ACME tubes under the Psvane Store show Salience as the seller and shipper. They are not part of Psvane according to you yet they appear there. This has nothing to do with other sellers of Psvane tubes on Amazon it is about what shows up under the Psvane Store

Better do your due diligence when it comes to tube purchases. A wide variety brands, hierarchy within brands, NOS vs. new,  distributors, shippers. And then the vagaries of circuit design within the tube equipment. Blame for failures often confused.

Purchase tubes from well regarded distributors/retailers, testing of tubes at this level important. Make sure tube specs match the equipment it's being placed in, many tube equipment manufacturers run their tubes hot, not good for reliability. I've seen many repeated tube failures in certain equipment over the years, tubes get the blame when blame should have been assigned to equipment manufacturer. Shipping extremely problematic, expect handing of packages to be severe, either immediate failure of tubes or shortened tube life to be expected, extreme measures in safely packing tubes needed.

Being observant of all the above I've had widely variable experience with tubes over the years. NOS/New production aprox. same for longevity/reliability. Mostly I've had good luck with tubes since I've paid attention to above. As for Psvane, I've had a couple failures of 101DWE, this due to excess heater voltage, once heater resistor changed out no more failures. No issues with lower level Psvane or Acme 300B's, various 845's.

@alightronics

So, I did purchase a matched pair of the Psavne Acme 845's from AliExpress. 

I must say they do sound very nice.  However, periodically the 845 in the right channel will make a disturbing noise for a few seconds right at the time I turn the amplifier on and then the noise goes away never to return during that listening session that may be for about 3 hours long.  However, the next day or night I want to listen again, the noise happens yet again when I first power up the amplifier.

It's only the right tube, never the left.  It only lasts for a few seconds and then goes away until I have to turn the amp on again.

I have two other sets of 845's, both different brands and this does not happen at all with those.

What is goin on here with these Acme tubes?  Other than the start up noise, they sound amazing.  To the point that I was thinking of ordering another pair for backup, but not if they are not going to last.  

Please advise me as to what is happening.  

Thank you and best wishes,

Don

Just to add to the post above.  The noise the 845 makes in the right channel upon turning on the amplifier is kinda of like....

Phfffiiisssst... it only lasts for about 3-5 seconds and then goes away for the rest of the listening session. It only happens upon start up.  It's unnerving and very unsettling when it happens as it makes me afraid it going to either ruin my amp or my speaker.

@no_regrets

Understood. I suggest you contact the dealer for a replacement. This issue might be caused by internal component loosening during long-distance shipping and multiple handlings.

Please rest assured, our Acme series has been sold for many years and has never caused any equipment damage.