I.D. This Tube?
Moderators: pompeiisneaks, Colossal
I.D. This Tube?
Anyone able to I.D. this large tube? Quite certain it's "worthless" but would be interesting to know what it is. At least I could test it then. It's being scotched by another worthless guy. k
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Stevem
- Posts: 5144
- Joined: Fri Jan 24, 2014 3:01 pm
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Re: I.D. This Tube?
Well it looks like it’s a duel section Octal, with one rectifier section and what looks like one Triode section .
Any more then that I don’t know how one would figure that out!
Any more then that I don’t know how one would figure that out!
When I die, I want to go like my Grandfather did, peacefully in his sleep.
Not screaming like the passengers in his car!
Cutting out a man's tongue does not mean he’s a liar, but it does show that you fear the truth he might speak about you!
Not screaming like the passengers in his car!
Cutting out a man's tongue does not mean he’s a liar, but it does show that you fear the truth he might speak about you!
Re: I.D. This Tube?
I like a good challenge. I like what Stevem suggests. If we knew more, we might be able to find a picture. There are a couple of museum type websites for vacuum tubes that have pictures and eBay is another source of pictures. It is possible to develop a list of double diode + triode tubes. The list might be expanded for tubes with 2 configurations inside.
Museum picture example:
https://www.radiomuseum.org/tubes/tube_6sq7gt.html
eBay example:
https://www.ebay.com/itm/Delco-GM-Vinta ... 3534590736
Do you know or do you have any idea what device that tube came from? I'm thinking an old car radio. What I'm driving at is the heater voltage requirement. If we know it is 6.3V or 12.6V it narrows the choices. And/or, is there any way to identify which pins are the heater pins? This might be done by simple observation of where they go at the bottom of the glass tube. The pictures don't show this and I'm not sure you could easily get one. When we know the heater pins, we can narrow the base configuration. For example and 8Q Octal will have heaters on pins 7 and 8. This will narrow the choices further.
We know it is a glass tube, so we can eliminate all the metal tubes. We can eliminate those with a top cap. We can also eliminate tubes that have curved glass. It's a start.
Here's a long shot. Put the tube in the freezer for a while. When you remove it, breathe on the glass so moisture will condense on the glass. Sometimes this will reveal the tube type mark...problem solved.
Museum picture example:
https://www.radiomuseum.org/tubes/tube_6sq7gt.html
eBay example:
https://www.ebay.com/itm/Delco-GM-Vinta ... 3534590736
Do you know or do you have any idea what device that tube came from? I'm thinking an old car radio. What I'm driving at is the heater voltage requirement. If we know it is 6.3V or 12.6V it narrows the choices. And/or, is there any way to identify which pins are the heater pins? This might be done by simple observation of where they go at the bottom of the glass tube. The pictures don't show this and I'm not sure you could easily get one. When we know the heater pins, we can narrow the base configuration. For example and 8Q Octal will have heaters on pins 7 and 8. This will narrow the choices further.
We know it is a glass tube, so we can eliminate all the metal tubes. We can eliminate those with a top cap. We can also eliminate tubes that have curved glass. It's a start.
Here's a long shot. Put the tube in the freezer for a while. When you remove it, breathe on the glass so moisture will condense on the glass. Sometimes this will reveal the tube type mark...problem solved.
Re: I.D. This Tube?
This looks promising!
http://vinylsavor.blogspot.com/2013/09/ ... -6gl7.html
http://vinylsavor.blogspot.com/2013/09/ ... -6gl7.html