This tube was developed by RCA in October 1936 and announced in the November 1936 issue of QST magazine. The tube made by many US manufacturers, internationally made by Philips in …

2012年7月30日 · Since I posted my message, I have tried some RCA, Sylvania, Mullard, and supposedly brand-unmarked 807 of Russian origin. The Ampex 6516 has its front end with …

2013年1月15日 · Developed by RCA in the mid-1930s, this type was originally intended for use as an audio final. It included other, then new, features besides the elimination of an actual, …

The 807 was based on the RCA type 6L6 beam tetrode, which had a long, fairly thin, anode and a carefully-aligned grid structure. The 6L6 employed rapidly-accelerated electrons and short …

2013年9月4日 · The 807 was used in radio frequency transmitters and at times audio modulators for AM transmission. Both ham radio and WWII equipment made the 807 very popular for use …

The 807 is an HF transmitting valve developed from the 6L6G audio valve by RCA in America around 1937. In addition to widespread use at RF the 807 was used extensively for audio both …

2018年10月12日 · Sylvania 6SN7GTB: Just did not sound as full and rich as the Raytheon, GE (1950) or RCA. Westinghouse 6SN7GT : This tube says Made in England on it and I was …

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2013年2月14日 · 本人测试了一下807帘栅电压在50V、100V、200V条件下的屏极电流，与RCA的6L6非常相似。 那么就用6L6的帘栅特性来分析807吧。 其帘栅特性大概有以下特点： 1、线 …

USA made NOS RCA 807s. The RCA is one of the best sounding 807 tubes you can buy! * 30 Day Rock Solid Warranty on ALL NOS Tubes! Read more. RCA 807 Vacuum Tubes $42.50 In …