Not in pre, but my amp.
Been using a 6F8G for a month now and like it.
About the same as the Ken Rad but tightened up the bass.
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From Don Sachs whose electronics use 6SN7's octal tubes. He has heard most every variant of the tubes and concludes this: "In my gear, I use Linlai e series or the Shuguang WE6SN7plus. The best tube I have ever heard is the new Ray tubes select 6sn7, which is pricey." He is believes these Chinese tubes are superior in SQ to a lot of the pricey NOS tubes. He admits that he has not heard the new WE 300b tubes, which might be better, but are extremely expensive. |
No, the cv181z were always real stable. That being said, the tube pins and socket connections are sensitve - you just couldn't push a tube in and let it roll. Sometime it's needed a VERY MINOR tweek of the tube - adding a little twist, little bit of lean, or just a reseat is all it would bring it in Don't discount the signal tubes either |
No sweat, @marco1 , I didn't take anything negative from it, I was just replying in a neutral tone. But thanks for following up. |
Based upon Don Sach’s recommendation quoted by Whitestix above, I got Ray Reserve 6SN7s for my Valhalla integrated and immediately noticed more detail without any sharpness or glare or the expense of the lushness of tubes. These tubes are expensive and liable to get more expensive if tariffs come to be. There are Ray Select tubes that are about half or less than the Reserve but I haven’t heard them. I found them to be better than the Linlai tubes I had in place. |
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