One I found in the bottom of my tube drawer:
jackinnj Member Joined 2002 tech-diy.com 2010-09-06 7:43 pm #1 2010-09-06 7:43 pm #1 One I found in the bottom of my tube drawer: Attachments MysteryTube.jpg 18.1 KB · Views: 164 ••• More options Share Tubelab_com Member Joined 2005 tubelab.com 2010-09-06 8:12 pm #2 2010-09-06 8:12 pm #2 How many pins? 9? I have several tubes that look like this, but the most common flavor is 6EJ7 or 6EH7. ••• More options Share richwalters Member Joined 2003 2010-09-06 8:20 pm #3 2010-09-06 8:20 pm #3 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 Attachments IMG_1190.JPG 102.2 KB · Views: 140 ••• More options Share jackinnj Member Joined 2002 tech-diy.com 2010-09-06 9:17 pm #4 2010-09-06 9:17 pm #4 I put it on the flatbed scanner: Attachments MysteryTube2.jpg 55.9 KB · Views: 122 ••• More options Share D DF96 R.I.P. Joined 2007 myweb.tiscali.co.uk/g8hqp/ 2010-09-06 9:20 pm #5 2010-09-06 9:20 pm #5 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? ••• More options Share Show hidden low quality content Status This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button. Share: Facebook Twitter Reddit Pinterest Tumblr WhatsApp Email Share Link
Tubelab_com Member Joined 2005 tubelab.com 2010-09-06 8:12 pm #2 2010-09-06 8:12 pm #2 How many pins? 9? I have several tubes that look like this, but the most common flavor is 6EJ7 or 6EH7. ••• More options Share richwalters Member Joined 2003 2010-09-06 8:20 pm #3 2010-09-06 8:20 pm #3 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 Attachments IMG_1190.JPG 102.2 KB · Views: 140 ••• More options Share jackinnj Member Joined 2002 tech-diy.com 2010-09-06 9:17 pm #4 2010-09-06 9:17 pm #4 I put it on the flatbed scanner: Attachments MysteryTube2.jpg 55.9 KB · Views: 122 ••• More options Share D DF96 R.I.P. Joined 2007 myweb.tiscali.co.uk/g8hqp/ 2010-09-06 9:20 pm #5 2010-09-06 9:20 pm #5 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? ••• More options Share Show hidden low quality content Status This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button. Share: Facebook Twitter Reddit Pinterest Tumblr WhatsApp Email Share Link
How many pins? 9? I have several tubes that look like this, but the most common flavor is 6EJ7 or 6EH7.
richwalters Member Joined 2003 2010-09-06 8:20 pm #3 2010-09-06 8:20 pm #3 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 Attachments IMG_1190.JPG 102.2 KB · Views: 140 ••• More options Share jackinnj Member Joined 2002 tech-diy.com 2010-09-06 9:17 pm #4 2010-09-06 9:17 pm #4 I put it on the flatbed scanner: Attachments MysteryTube2.jpg 55.9 KB · Views: 122 ••• More options Share D DF96 R.I.P. Joined 2007 myweb.tiscali.co.uk/g8hqp/ 2010-09-06 9:20 pm #5 2010-09-06 9:20 pm #5 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? ••• More options Share Show hidden low quality content Status This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button. Share: Facebook Twitter Reddit Pinterest Tumblr WhatsApp Email Share Link
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 Member Joined 2002 tech-diy.com 2010-09-06 9:17 pm #4 2010-09-06 9:17 pm #4 I put it on the flatbed scanner: Attachments MysteryTube2.jpg 55.9 KB · Views: 122 ••• More options Share D DF96 R.I.P. Joined 2007 myweb.tiscali.co.uk/g8hqp/ 2010-09-06 9:20 pm #5 2010-09-06 9:20 pm #5 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? ••• More options Share Show hidden low quality content Status This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
D DF96 R.I.P. Joined 2007 myweb.tiscali.co.uk/g8hqp/ 2010-09-06 9:20 pm #5 2010-09-06 9:20 pm #5 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? ••• More options Share
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?
