Anyone identify this Mullard?

jackinnj · 6th September 2010, 06:43 PM

One I found in the bottom of my tube drawer:

tubelab.com · 6th September 2010, 07:12 PM

How many pins? 9? I have several tubes that look like this, but the most common flavor is 6EJ7 or 6EH7.

richwalters · 6th September 2010, 07:20 PM

EF80, EF184; IF screened pentodes. Compare with my pic. My guess yours is E80CF group of specials which have a longer black getter.
ANyone else ?

richy

jackinnj · 6th September 2010, 08:17 PM

I put it on the flatbed scanner:

DF96 · 6th September 2010, 08:20 PM

The etch code looks like Lt1 B9K, so it is an EF80 (6BX6) RF/IF straight pentode, intended for TV receiver IF amplifiers. Made in Blackburn in 1959?

6th September 2010, 07:12 PM	#2
tubelab.com diyAudio Member Join Date: Jul 2005 Location: South Florida	How many pins? 9? I have several tubes that look like this, but the most common flavor is 6EJ7 or 6EH7. __________________ Too much power is almost enough! Turn it up till it explodes - then back up just a little.

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6th September 2010, 08:20 PM	#5
DF96 diyAudio Member Join Date: May 2007	The etch code looks like Lt1 B9K, so it is an EF80 (6BX6) RF/IF straight pentode, intended for TV receiver IF amplifiers. Made in Blackburn in 1959?

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