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 Post subject: ID this tube?
PostPosted: Nov Fri 15, 2019 6:27 pm 
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I reck'on this officially brings me into the tube guy club :D . I bought a lot of 60 audio tubes and this one has no markings. It has gold pins so must be fairly good quality? Not sure if a tube can be identified without any markings, guess I will find out...

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 Post subject: Re: ID this tube?
PostPosted: Nov Fri 15, 2019 6:45 pm 
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6CB6

https://www.radiomuseum.org/tubes/tube_6cb6.html

Or it could be a 6AG5

https://www.radiomuseum.org/tubes/tube_6ag5.html

Gold pins would indicate it was a Radio Shack Realistic "lifetime" tube.

RCA used the 6CB6 in their 50 watt amplifier schematic in the later tube manuals.

-Steve

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 Post subject: Re: ID this tube?
PostPosted: Nov Sat 16, 2019 3:12 am 
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This is a list of the tubes I got, all pretty much audio tubes?

7199
12AU7A qty2
12BA6
12BE6 qty2
12BH7A
12BY7A
12DT8
12HC7
17CT3 qty2
35EH5 qty2
3GK5
50C5
5AQ5
6BQ5 qty2
6BQ7A
6BZ6 qty2
6CL8A
6EA8 qty2
6EZ5
6FQ7-6CG7 qty2
6FS5
6GH8A qty6
6GJ7
6GK6
6GK8
6GM6
6GN8 qty2
6GU7
6GY6
6HA5
6HM5-6HA5
6HS8
6J6A
6JC6
6JH6 qty2
6KA8
6KT8 qty4
6MJ8

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 Post subject: Re: ID this tube?
PostPosted: Nov Sat 16, 2019 4:19 pm 
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Also, if I may ask, who would be the manufacturer of these tubes? Has USA on them with these dots?

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 Post subject: Re: ID this tube?
PostPosted: Nov Sat 16, 2019 7:03 pm 
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12BE6, manufactured by GE?

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 Post subject: Re: ID this tube?
PostPosted: Nov Sat 16, 2019 10:51 pm 
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Yes, GE used large etched numbers and dots - don't know if anyone has decoded the dot codes...

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 Post subject: Re: ID this tube?
PostPosted: Nov Sun 17, 2019 1:02 am 
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This is a list of the tubes I got, all pretty much audio tubes?
Almost all are TV tubes and tubes for low cost radios. A few found their way into some audio gear. 6BQ5, 12AU7, and 7199 are the ones most likely to be found in audio applications.

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