不少朋友对7308还不太了解,有必要上点资料.
7308:
This is probably the ultra 6DJ8 type tube commonly available. It has all of the features of the 6922, but the triode sections are also matched to each other, and the tubes all fit within very tight specifications. Therefore, any 7308 should match any other 7308 within the same brand. The Amperex versions were again made in New York, complete with gold pins, and often have a number etched into the side of the glass. Amperex made these for industry as well as the military. The Amperex versions have the PQ label, the military type usually is labeled "USN-CEP", but I have seen versions made for Stromberg-Carlson and Hewlett-Packard, with white ink labels. These all had the numbers etched into the glass, and all are the same tube. The USA made military white label types have been rated "Best of All", over other 7308, 6922 and even Cca tubes, in several well-documented 6922/7308/Cca listening tests. Therefore this particular type is becoming scarce and prices are rising. There were a few of these made in Holland, but most were made in the USA, therefore the Holland tubes are RARE and usually command a higher price. The Holland PQ versions have the PQ with stars on either side of the letters, and the words ";Premium Quality", where the USA types have the PQ inside of a shield logo. Again, there are some nice vintage USA made standard pin military and industrial types available from Raytheon and Sylvania, just to name a few, and these are quite good at a price currently far below the European vintage labels.
New Old Stock White Box. Wow, these tubes keep disappearing! Rated "Best of All" in 7308/6922 and Cca listening tests! Maybe that is why they are getting so scarce. These all have early 1960s date codes, etched batch numbers in the glass, and are the old white label version. These are specially selected Amperex PQ 7308 tubes, literally the "best of the best!" Matched triode sections, burn in tested, heavily plated gold pins, incredible tubes. I have carefully matched these in pairs and verified the matching on several tube testers. Supplied with test data.
$350.00 per pair 1 pair
E188CC=7308是高等级管，在技术指标上好于E88CC/6922，它有更高的耐压能力、更长的寿命、更大的屏耗等规格上的优点，这种军用管或医疗用和仪器用电子管在素质上略高于同厂同编号电子管。用ａｍｐｅｒｅｘ7308代替Sovtek的6922，效果令人惊喜，细节、定位、临场感、音乐味通通胜出！
早期金脚E188CC
金脚E188CC.也就是我们说的最好声音的胆7308.6922的顶级.此胆在国内也是极少见,如果能找到全新的,售价也在800--900元左右一只.
最後一款同屬Amperex出品，美國製沙金腳軍用級7308，此膽特性跟先前談及Philips E188CC同樣以靜見稱，兩極伸延沒有明顯遞增，樂器線條跟人聲同樣活靈活現，Tonal Balance維持在極高水平，味道亦相對地較淡口，未及採用﹝德律風根﹞時熱情。
