Tube EF 86 or Röhre EF86 ID2011, Vacuum Pentode, Noval, 9 pin miniature (USA pico-9) B9A and Audio Frequency shown. Radio tubes are valves.

2009年8月26日 · EF184, EF95, EF80 [etc..etc] can substitute the EF86 only after the whole circuit has been redesigned. Simply, the EF86 is usually designed to run about 1 to 3mA (where it …

2022年12月3日 · 这两只管子我都用过，是在300B胆机上用的，6J8P是草根管子，EF86则是贵族管子，它们都属于5级管，我通过转换插座在一台机器上仔细听过它们的声音差别，客观的说 …

I was looking for a low current small signal pentode, and in the end I found that of all the common types, the EF86 is the best for my intended purpose. The main attribute it has is low plate …

2021年1月25日 · If microphonics is a concern (and it isn’t unusual for small signal pentodes), then designing EF86 preamp stages with lower gain (e.g for a gain of 100 instead of 200), can …

2010年9月23日 · gec原厂生产的z729是英国ef86系列中机能最好的.其声音温暖丰满,相对大盾ef86保留了更多的细节和动态.z729以早期细网方环为佳,其次为细网方环和粗网方环的.后期非 …

EF86 page sheet date 1 1 1970.01 2 2 1970.01 3 3 1970.01 4 4 1970.01 5 FP 1999.08.16. Title: EF86 Author: Philips (scanned by Frank Philipse) Created Date: 8/16/1999 11:08:19 PM

2017年6月13日 · 據介紹，在 50 年代後期，由生產飛利浦，德律風根，沃爾沃和通用電力公司等等。 這是非常相似電到八進制基地 EF37A和 Rimlock 基地 EF40。 不像許多 pentodes它 是專 …

2018年1月13日 · The EF86 stage is unchanged from the original except for the 1/4” jack input and resistors to grid. The James tone stack idea from: https://www.ampbooks.com/mobile/amp …

2016年9月22日 · EF86's are prone to noise and it takes quite a few to find an ideal quiet pair. The Soviet tubes that BH ships with the kits are good quality and a nice starting point. Be aware …