Quote:Posted by: Ghostship Posted on: Today at 06:23:02
...I understand the 6P14P can be wired either as a pentode or triode like the 6P15P, but I haven't researched enough to learn, does that mean the 6P14P is compatible with the Hazen Grid/CCE mod too?
Short answer is no. Longer answer is the 6P14P is the Russian version of the EL84, so no.
The longest answer, if you really want to go down the rabbit hole, is the CCE mod is great, everything else being equal, but things are never equal. You have heard that for yourself with the 7189 (with which I personally have no experience) that you found sounds better than the stock tube, even without CCE. Here is my experience, briefly, FWIW/YMMV.
Back when Russian tubes were cheap I bought a bunch of different 6P15P types. The test results were all over the map, as was the sound. For me, I found I preferred the 6P15P-ER (-EP in Cyrillic), but if you are buying on ebay I suggest buying several, of the different types and listening for yourself. Be prepared to throw out some/many that just suck.
What I found I liked even better is the EL822 tube, which needs an adapter (EL822->EL84). I used Chinese adapters for years and they are fine, but these tubes are also CCE compatible so eventually I got custom adapters made that maintain CCE. Turning on CCE was a small, but noticeable upgrade.
There is also the EL803S tube, which also needs an adapter (EL83->EL84), and is also CCE compatible. With certain combinations of input tubes and rectifiers these can sound better than the EL822, but generally these are my second string power tubes.
I have not had good results with EL84/6P14P tubes.
Good luck, and keep us posted as your journey continues.