As you may know the Tungsram PCC88 is almost a requirement to make the PS Audio BHK preamp and power amps sound really good. Especially the variety we had gotten from the German government.
Sadly we use them in another product, the amazing Manley Chinook Special Edition phono stage, and have to support those customers.
For this reason we have taken the Tungsram PCC88 off our website and they are no longer for sale.
However if you bought your PS Audio BHK or Manley from us DIRECTLY we will sell you replacement tubes. E-mail us through the website and include the serial number and invoice number from your receipt.
If you bought second-hand THAT DOES NOT QUALIFY! PLEASE DON’T ASK!! There are NO exceptions to this rule. So sorry for that.
This is the tube mentioned by Bascom King as being the best choice for the PS Audio BHK Series preamp and Amplifiers. It is an incredible tube for you folks that own one.
If you don’t own one yet, STOP!
Yes, the BHK preamp and amps are pretty good. But before you pull the trigger you need to know this. When Bascom King was designing the BHK amps and preamp, he turned to Upscale Audio to try different tube types and get the voicing just where he wanted it. Of course using vintage new old stock (NOS) tubes could not be used for production, but we have an intimate knowledge and understanding of how to take an already incredible product even better. And not by a small margin.
We found a very special tube made by Tungsram that Bascom King likes a lot. He should. They add a level of texture and sense of space that is incredible. BUT recently I found a small stash of them that are unique. They had been locked up in a warehouse in Serbia for over 50 years. We graded out them by only considering the ones that have the highest transconductance for longest life. Then we look at the measurements and accepted only the ones with a triode balance of 5% or better. We then tested them again, this time for gain, so the two halves of the tube amplify equally and required the same 5% balance. If they pass that test, we put them in a moving coil phono stage with 60dB of gain and listen to them with headphones, carefully listening for both noise and microphony, to achieve the absolute blackest background.
This tube we are calling the Tungsram BHK Select, and is not available to the public. We have 100 of them, to be given to 25 buyers of BHK amps or preamps. If you already own a BHK amp or preamp, we can offer you the regular Tungsrams, but not these.
7DJ8/PCC88 are a great choice. They are absolutely compatible with virtually any product that uses 6922 and 6DJ8 Whether it's an amp, preamp, CD player, whatever. You still need to pick a good one of course. And one that meets your sonic requiremements. And Upscale Audio doesn't sell any sucky ones. But understand this: You are in essence getting tasty stuff for half what you would pay if they were labeled 6DJ8 instead of 7DJ8. They will operate the same. Trust Uncle Kevvy on this one.
Made in Hungary, and test beautifully. Most all of them have tested low in microphony, so we do not have any Driver grade at the moment.
Platinum grade - The best of the best. Lowest noise and microphony with the tightest triode balance we have available. This is typically 10% or tighter, but may be higher depending on available stock.
Gold grade - Low noise and microphonics with a triode balance typically between 15% and 20%, but may be higher depending on available stock.
Logo and box may vary from picture above. Price includes matching in any quantity you need at no extra charge.