Triode-Pentode - 9 pin noval B9A

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  E80CF/ECF80 special  ADZAM ( mullard made B code) gold pin  10000 hr.

https://frank.pocnet.net/sheets/190/e/E80CF.pdf

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ECF80/6BL8 EI Yugoslavia  Philips machine and materials

http://www.r-type.org/pdfs/ecf80.pdf

ECF80 / 6BL8 EI Nis made in Yugoslavia. Same plate structure like Philips ECF80 mabe by Mullard, Blackburn, pentode ribbed plate one side hole + two side slots, triode smooth plate with two side holes, just getter support is different, in EI tubes it’s double support construction.

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6U8A /ECF82  Jan philips ECG

http://www.r-type.org/pdfs/6u8a.pdf

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6U8 / ECF82 RTC france millitary ( mullard plant in France)

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ECF82 Telefunken

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ECF82 Philips

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ECF82/6U8A Ultron germany halo getter

 

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ECF802 ULTRON

https://tubedata.jp/sheets/050/e/ECF802.pdf

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6GH8A/ECF82 samsung/nec

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6GH8A ULTRON  SQ gold brand

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E80CF siemens gold pin

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E80CF Mullard gold pin

https://frank.pocnet.net/sheets/190/e/E80CF.pdf

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  6LB8 RCA

https://frank.pocnet.net/sheets/201/6/6LB8.pdf

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   6LB8  GE