The 8A8 is from the era of VHF Band III television in the mid 1950's. The valve is a triode pentode, with separate cathodes, designed to function as a mixer and oscillator in the tuner or converter if used with an older Band I television.

Tube 8A8 or Röhre 8A8 ID5139, Triode-Pentode, Noval, 9 pin miniature (USA pico-9) B9A and Frequency converter shown. Radio tubes are valves.

2017年3月10日 · 苏联早期电子管型号无甚规律可循，开头СО-、СБ-、УО-、УБ-这样地写，可能与用途相关（带栅极的电子管或整流管，电池式或交流式），后面跟两到三位数字，按照定型顺序从小到大把型号分开，数字小，说明定型年代早，管座多为欧洲长四脚或长五脚，数字大（200以上者）多半是标准八脚管座。 有些仿制美国产品的，又直接用美国型号（或将英语字母用发音近似俄语字母代替），于是发生混乱。 自ГОСТ标准颁布之后则焕然一新，全部使用新管号。 具 …

The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 49 mm tall. References: Data-sheet & 1040. Type PCF80 was first introduced in 1953. See also 1953 adverts.

三五極複合管。プレート電圧が低い、もともとTV用の球であるのを知ったのは後年のこと。5極出力部を三結にしても比較的出力が落ちない。ヒーターの電圧違いで、8A8、16A8、32A8などがあり、少ない数の球でアンプが構成できた。 6bm8 sovtek

This is a MOTOROLA 9A8 / 8A8 / PCF80 Triode Pentode Frequency Converter Vacuum tube in original box. glass has nice green ink "MOTOROLA GOLDEN PREMIUM RATED and MADE IN GREAT BRITAIN". you get exactly the tube pictured.

With our tubes, you can achieve the classic, warm sound that only vacuum tubes can provide. We offer a variety of tube types and brands to fit your specific needs and preferences. Our vacuum tubes are also an excellent choice for vintage radio enthusiasts.

9 pin miniature type medium-mu triode, sharp cutoff pentode used as combined oscillator and mixer tube in vhf television receivers.

Home Resources References Tubes Forums Links Support Sale Tube Substitutions for: 8A8 Triode-Pentode. Type Substitutes Base Diagram; 8A8: 9A8, 9EA8, 9U8, 9U8A: Web References: 8A8 @ RadioMuseum.org: Type 8A8 Triode-Pentode MECHANICAL DATA. Basing: 9DC

Title: 6A8G 6A8GT Author: Brimar Subject: DPo-FP-2006-03-05 Created Date: 3/5/2006 11:47:36 AM