Have you tried the usual methods of bringing out the printing on the tube? Breathing on it; rubbing it on the side of your nose (for the skin oils); putting it in the freezer for a while; ultra-violet. Of course, this would be a good excuse to just buy a Trans-Oceanic.
You can get an idea by looking inside. The 1L6 has 5 grids. It could be confused with 1R5 but this tube has a connection between pin #1 and #5. 1L6 only has continuity between pin #1 and #7, filament.
Norm
::I picked up a caddy of tubes some time back. From it I have a Sylvania Tube box for a 1L6 with a tube in it. The tube looks like a 1L6 (and others), tests like a 1L6. Problem is I can't read 1L6 on the tube. I don't have a radio to test it with. The tube has been handled enough to smear off the lettering which does make me a little leary. However, I will make it available to someone to try in their Trans-Oceanic. If it works then what a deal I got for you.
::Bill VA
:
:Have you tried the usual methods of bringing out the printing on the tube? Breathing on it; rubbing it on the side of your nose (for the skin oils); putting it in the freezer for a while; ultra-violet. Of course, this would be a good excuse to just buy a Trans-Oceanic.
As Norm mentioned in another post here, check for continuity between pins 1 and 5. If there is continuity, then the tube is most likely not a 1L6 possibly a 1R5. On another note, I have a 1R5 tube with pin 5 cut off that I use in place of the expensive 1L6 for the initial testing of a TO. I cut pin 5 off in case that pin on the socket was used as a tie point for other components. I believe a 1R5 can be used in the few radios that used a 1L6 and were broadcast band only.
Radiodoc
***********
:I picked up a caddy of tubes some time back. From it I have a Sylvania Tube box for a 1L6 with a tube in it. The tube looks like a 1L6 (and others), tests like a 1L6. Problem is I can't read 1L6 on the tube. I don't have a radio to test it with. The tube has been handled enough to smear off the lettering which does make me a little leary. However, I will make it available to someone to try in their Trans-Oceanic. If it works then what a deal I got for you.
:Bill VA
:Bill VA.,
:
:As Norm mentioned in another post here, check for continuity between pins 1 and 5. If there is continuity, then the tube is most likely not a 1L6 possibly a 1R5. On another note, I have a 1R5 tube with pin 5 cut off that I use in place of the expensive 1L6 for the initial testing of a TO. I cut pin 5 off in case that pin on the socket was used as a tie point for other components. I believe a 1R5 can be used in the few radios that used a 1L6 and were broadcast band only.
:
:Radiodoc
:***********
:
:
::I picked up a caddy of tubes some time back. From it I have a Sylvania Tube box for a 1L6 with a tube in it. The tube looks like a 1L6 (and others), tests like a 1L6. Problem is I can't read 1L6 on the tube. I don't have a radio to test it with. The tube has been handled enough to smear off the lettering which does make me a little leary. However, I will make it available to someone to try in their Trans-Oceanic. If it works then what a deal I got for you.
::Bill VA
In a Zenith T/O you don't need to cut off pin #5 of a 1R5 when used in place of a 1L6.
Zenith supplied B+ voltage in their T/O's to pin #5 through a large value resistor. By not cutting off pin #5 of 1R5 the B supply is loaded by the resistor. Value is high enough it doesn't waste much power.
In Zenith, none T/O radios, this pin is supplied directly from B+, no resistor. In this case pin #5 must be removed on a 1R5 if it will be used in place of a 1L6. If not B+ is shorted to B-.
Norm
:I substituted a 1R5 for a 1L6 in a Transoceanic. It seems to work OK, even on shortwave bands. I wasn't smart enough to cut off Pin 5, but anyway it works.
:Doug
:
::Bill VA.,
::
::As Norm mentioned in another post here, check for continuity between pins 1 and 5. If there is continuity, then the tube is most likely not a 1L6 possibly a 1R5. On another note, I have a 1R5 tube with pin 5 cut off that I use in place of the expensive 1L6 for the initial testing of a TO. I cut pin 5 off in case that pin on the socket was used as a tie point for other components. I believe a 1R5 can be used in the few radios that used a 1L6 and were broadcast band only.
::
::Radiodoc
::***********
::
::
:::I picked up a caddy of tubes some time back. From it I have a Sylvania Tube box for a 1L6 with a tube in it. The tube looks like a 1L6 (and others), tests like a 1L6. Problem is I can't read 1L6 on the tube. I don't have a radio to test it with. The tube has been handled enough to smear off the lettering which does make me a little leary. However, I will make it available to someone to try in their Trans-Oceanic. If it works then what a deal I got for you.
:::Bill VA
Bill VA
:Doug
:
: In a Zenith T/O you don't need to cut off pin #5 of a 1R5 when used in place of a 1L6.
:
: Zenith supplied B+ voltage in their T/O's to pin #5 through a large value resistor. By not cutting off pin #5 of 1R5 the B supply is loaded by the resistor. Value is high enough it doesn't waste much power.
:
: In Zenith, none T/O radios, this pin is supplied directly from B+, no resistor. In this case pin #5 must be removed on a 1R5 if it will be used in place of a 1L6. If not B+ is shorted to B-.
:
:Norm
:
::I substituted a 1R5 for a 1L6 in a Transoceanic. It seems to work OK, even on shortwave bands. I wasn't smart enough to cut off Pin 5, but anyway it works.
::Doug
::
:::Bill VA.,
:::
:::As Norm mentioned in another post here, check for continuity between pins 1 and 5. If there is continuity, then the tube is most likely not a 1L6 possibly a 1R5. On another note, I have a 1R5 tube with pin 5 cut off that I use in place of the expensive 1L6 for the initial testing of a TO. I cut pin 5 off in case that pin on the socket was used as a tie point for other components. I believe a 1R5 can be used in the few radios that used a 1L6 and were broadcast band only.
:::
:::Radiodoc
:::***********
:::
:::
::::I picked up a caddy of tubes some time back. From it I have a Sylvania Tube box for a 1L6 with a tube in it. The tube looks like a 1L6 (and others), tests like a 1L6. Problem is I can't read 1L6 on the tube. I don't have a radio to test it with. The tube has been handled enough to smear off the lettering which does make me a little leary. However, I will make it available to someone to try in their Trans-Oceanic. If it works then what a deal I got for you.
::::Bill VA
Doubt if you will ever see a 1U6? It has a 25 ma filament and can't be used in series with standard 50 ma tubes. This tube is seldom found.
Norm
:I'm sure glad this forum is here. Didn't even think about that. I don't have any continunity other than with pin 1 and 7, a little over 6 ohms. The 1L6 and 1U6 are the only two tubes x-ref to basing 7DC in one of my tube manuals. I don't think a technican would have changed it out without remarking the box since he kept it. Thanks everyone. I'm going to put it in the freezer for awhile Johnnysan. If I get it out and drop...
:
:Bill VA
:
:
:
::Doug
::
:: In a Zenith T/O you don't need to cut off pin #5 of a 1R5 when used in place of a 1L6.
::
:: Zenith supplied B+ voltage in their T/O's to pin #5 through a large value resistor. By not cutting off pin #5 of 1R5 the B supply is loaded by the resistor. Value is high enough it doesn't waste much power.
::
:: In Zenith, none T/O radios, this pin is supplied directly from B+, no resistor. In this case pin #5 must be removed on a 1R5 if it will be used in place of a 1L6. If not B+ is shorted to B-.
::
::Norm
::
:::I substituted a 1R5 for a 1L6 in a Transoceanic. It seems to work OK, even on shortwave bands. I wasn't smart enough to cut off Pin 5, but anyway it works.
:::Doug
:::
::::Bill VA.,
::::
::::As Norm mentioned in another post here, check for continuity between pins 1 and 5. If there is continuity, then the tube is most likely not a 1L6 possibly a 1R5. On another note, I have a 1R5 tube with pin 5 cut off that I use in place of the expensive 1L6 for the initial testing of a TO. I cut pin 5 off in case that pin on the socket was used as a tie point for other components. I believe a 1R5 can be used in the few radios that used a 1L6 and were broadcast band only.
::::
::::Radiodoc
::::***********
::::
::::
:::::I picked up a caddy of tubes some time back. From it I have a Sylvania Tube box for a 1L6 with a tube in it. The tube looks like a 1L6 (and others), tests like a 1L6. Problem is I can't read 1L6 on the tube. I don't have a radio to test it with. The tube has been handled enough to smear off the lettering which does make me a little leary. However, I will make it available to someone to try in their Trans-Oceanic. If it works then what a deal I got for you.
:::::Bill VA
Replace with what?
Bill VA
Bill VA
:Bill
:
: Doubt if you will ever see a 1U6? It has a 25 ma filament and can't be used in series with standard 50 ma tubes. This tube is seldom found.
:
:Norm
:
::I'm sure glad this forum is here. Didn't even think about that. I don't have any continunity other than with pin 1 and 7, a little over 6 ohms. The 1L6 and 1U6 are the only two tubes x-ref to basing 7DC in one of my tube manuals. I don't think a technican would have changed it out without remarking the box since he kept it. Thanks everyone. I'm going to put it in the freezer for awhile Johnnysan. If I get it out and drop...
::
::Bill VA
::
::
::
:::Doug
:::
::: In a Zenith T/O you don't need to cut off pin #5 of a 1R5 when used in place of a 1L6.
:::
::: Zenith supplied B+ voltage in their T/O's to pin #5 through a large value resistor. By not cutting off pin #5 of 1R5 the B supply is loaded by the resistor. Value is high enough it doesn't waste much power.
:::
::: In Zenith, none T/O radios, this pin is supplied directly from B+, no resistor. In this case pin #5 must be removed on a 1R5 if it will be used in place of a 1L6. If not B+ is shorted to B-.
:::
:::Norm
:::
::::I substituted a 1R5 for a 1L6 in a Transoceanic. It seems to work OK, even on shortwave bands. I wasn't smart enough to cut off Pin 5, but anyway it works.
::::Doug
::::
:::::Bill VA.,
:::::
:::::As Norm mentioned in another post here, check for continuity between pins 1 and 5. If there is continuity, then the tube is most likely not a 1L6 possibly a 1R5. On another note, I have a 1R5 tube with pin 5 cut off that I use in place of the expensive 1L6 for the initial testing of a TO. I cut pin 5 off in case that pin on the socket was used as a tie point for other components. I believe a 1R5 can be used in the few radios that used a 1L6 and were broadcast band only.
:::::
:::::Radiodoc
:::::***********
:::::
:::::
::::::I picked up a caddy of tubes some time back. From it I have a Sylvania Tube box for a 1L6 with a tube in it. The tube looks like a 1L6 (and others), tests like a 1L6. Problem is I can't read 1L6 on the tube. I don't have a radio to test it with. The tube has been handled enough to smear off the lettering which does make me a little leary. However, I will make it available to someone to try in their Trans-Oceanic. If it works then what a deal I got for you.
::::::Bill VA
A tube with pick tint in the glass might be 200A. As long as filament is ok the tube should be good. These tubes with pink tint operate on very low plate voltage. Less than 22 1/2 volts. They will fail on a Hickok tube tester because of ionization. An emission tester should be ok.
Norm
:I don't think I ever saw one Norm. Of course that goes for a lot of other tubes. I had never seen a pinkish tube until just lately. Don't remember the numbers now but they are globe type. Got them in with a box of other globe tubes. Need to sort them all out some day and get rid of them.
:
:Bill VA
:
::Bill
::
:: Doubt if you will ever see a 1U6? It has a 25 ma filament and can't be used in series with standard 50 ma tubes. This tube is seldom found.
::
::Norm
::
:::I'm sure glad this forum is here. Didn't even think about that. I don't have any continunity other than with pin 1 and 7, a little over 6 ohms. The 1L6 and 1U6 are the only two tubes x-ref to basing 7DC in one of my tube manuals. I don't think a technican would have changed it out without remarking the box since he kept it. Thanks everyone. I'm going to put it in the freezer for awhile Johnnysan. If I get it out and drop...
:::
:::Bill VA
:::
:::
:::
::::Doug
::::
:::: In a Zenith T/O you don't need to cut off pin #5 of a 1R5 when used in place of a 1L6.
::::
:::: Zenith supplied B+ voltage in their T/O's to pin #5 through a large value resistor. By not cutting off pin #5 of 1R5 the B supply is loaded by the resistor. Value is high enough it doesn't waste much power.
::::
:::: In Zenith, none T/O radios, this pin is supplied directly from B+, no resistor. In this case pin #5 must be removed on a 1R5 if it will be used in place of a 1L6. If not B+ is shorted to B-.
::::
::::Norm
::::
:::::I substituted a 1R5 for a 1L6 in a Transoceanic. It seems to work OK, even on shortwave bands. I wasn't smart enough to cut off Pin 5, but anyway it works.
:::::Doug
:::::
::::::Bill VA.,
::::::
::::::As Norm mentioned in another post here, check for continuity between pins 1 and 5. If there is continuity, then the tube is most likely not a 1L6 possibly a 1R5. On another note, I have a 1R5 tube with pin 5 cut off that I use in place of the expensive 1L6 for the initial testing of a TO. I cut pin 5 off in case that pin on the socket was used as a tie point for other components. I believe a 1R5 can be used in the few radios that used a 1L6 and were broadcast band only.
::::::
::::::Radiodoc
::::::***********
::::::
::::::
:::::::I picked up a caddy of tubes some time back. From it I have a Sylvania Tube box for a 1L6 with a tube in it. The tube looks like a 1L6 (and others), tests like a 1L6. Problem is I can't read 1L6 on the tube. I don't have a radio to test it with. The tube has been handled enough to smear off the lettering which does make me a little leary. However, I will make it available to someone to try in their Trans-Oceanic. If it works then what a deal I got for you.
:::::::Bill VA
Norm
:Bill
:
: A tube with pick tint in the glass might be 200A. As long as filament is ok the tube should be good. These tubes with pink tint operate on very low plate voltage. Less than 22 1/2 volts. They will fail on a Hickok tube tester because of ionization. An emission tester should be ok.
:
:Norm
:
::I don't think I ever saw one Norm. Of course that goes for a lot of other tubes. I had never seen a pinkish tube until just lately. Don't remember the numbers now but they are globe type. Got them in with a box of other globe tubes. Need to sort them all out some day and get rid of them.
::
::Bill VA
::
:::Bill
:::
::: Doubt if you will ever see a 1U6? It has a 25 ma filament and can't be used in series with standard 50 ma tubes. This tube is seldom found.
:::
:::Norm
:::
::::I'm sure glad this forum is here. Didn't even think about that. I don't have any continunity other than with pin 1 and 7, a little over 6 ohms. The 1L6 and 1U6 are the only two tubes x-ref to basing 7DC in one of my tube manuals. I don't think a technican would have changed it out without remarking the box since he kept it. Thanks everyone. I'm going to put it in the freezer for awhile Johnnysan. If I get it out and drop...
::::
::::Bill VA
::::
::::
::::
:::::Doug
:::::
::::: In a Zenith T/O you don't need to cut off pin #5 of a 1R5 when used in place of a 1L6.
:::::
::::: Zenith supplied B+ voltage in their T/O's to pin #5 through a large value resistor. By not cutting off pin #5 of 1R5 the B supply is loaded by the resistor. Value is high enough it doesn't waste much power.
:::::
::::: In Zenith, none T/O radios, this pin is supplied directly from B+, no resistor. In this case pin #5 must be removed on a 1R5 if it will be used in place of a 1L6. If not B+ is shorted to B-.
:::::
:::::Norm
:::::
::::::I substituted a 1R5 for a 1L6 in a Transoceanic. It seems to work OK, even on shortwave bands. I wasn't smart enough to cut off Pin 5, but anyway it works.
::::::Doug
::::::
:::::::Bill VA.,
:::::::
:::::::As Norm mentioned in another post here, check for continuity between pins 1 and 5. If there is continuity, then the tube is most likely not a 1L6 possibly a 1R5. On another note, I have a 1R5 tube with pin 5 cut off that I use in place of the expensive 1L6 for the initial testing of a TO. I cut pin 5 off in case that pin on the socket was used as a tie point for other components. I believe a 1R5 can be used in the few radios that used a 1L6 and were broadcast band only.
:::::::
:::::::Radiodoc
:::::::***********
:::::::
:::::::
::::::::I picked up a caddy of tubes some time back. From it I have a Sylvania Tube box for a 1L6 with a tube in it. The tube looks like a 1L6 (and others), tests like a 1L6. Problem is I can't read 1L6 on the tube. I don't have a radio to test it with. The tube has been handled enough to smear off the lettering which does make me a little leary. However, I will make it available to someone to try in their Trans-Oceanic. If it works then what a deal I got for you.
::::::::Bill VA
:Bill VA.,
:
:As Norm mentioned in another post here, check for continuity between pins 1 and 5. If there is continuity, then the tube is most likely not a 1L6 possibly a 1R5. On another note, I have a 1R5 tube with pin 5 cut off that I use in place of the expensive 1L6 for the initial testing of a TO. I cut pin 5 off in case that pin on the socket was used as a tie point for other components. I believe a 1R5 can be used in the few radios that used a 1L6 and were broadcast band only.
:
:Radiodoc
:***********
:
:
::I picked up a caddy of tubes some time back. From it I have a Sylvania Tube box for a 1L6 with a tube in it. The tube looks like a 1L6 (and others), tests like a 1L6. Problem is I can't read 1L6 on the tube. I don't have a radio to test it with. The tube has been handled enough to smear off the lettering which does make me a little leary. However, I will make it available to someone to try in their Trans-Oceanic. If it works then what a deal I got for you.
::Bill VA
Not if you are careful. I painted a red dot at the bottom edge and side of the tube between pins 1 & 7 so I would not mistake the space where I removed pin 5 for the space between 1 & 7. Incidently, I did not CLIP pin 5 with pliars but used a Dremel tool and cutting blade so as not to break the tube.
Radiodoc
**********
:If you clip pin 5 on the 1R5 it is very easy to put it in the tube socket incorrectly. The voice of experience.
:
::Bill VA.,
::
::As Norm mentioned in another post here, check for continuity between pins 1 and 5. If there is continuity, then the tube is most likely not a 1L6 possibly a 1R5. On another note, I have a 1R5 tube with pin 5 cut off that I use in place of the expensive 1L6 for the initial testing of a TO. I cut pin 5 off in case that pin on the socket was used as a tie point for other components. I believe a 1R5 can be used in the few radios that used a 1L6 and were broadcast band only.
::
::Radiodoc
::***********
::
::
:::I picked up a caddy of tubes some time back. From it I have a Sylvania Tube box for a 1L6 with a tube in it. The tube looks like a 1L6 (and others), tests like a 1L6. Problem is I can't read 1L6 on the tube. I don't have a radio to test it with. The tube has been handled enough to smear off the lettering which does make me a little leary. However, I will make it available to someone to try in their Trans-Oceanic. If it works then what a deal I got for you.
:::Bill VA
:Mike M.,
:
:Not if you are careful. I painted a red dot at the bottom edge and side of the tube between pins 1 & 7 so I would not mistake the space where I removed pin 5 for the space between 1 & 7. Incidently, I did not CLIP pin 5 with pliars but used a Dremel tool and cutting blade so as not to break the tube.
:
:Radiodoc
:**********
:
::If you clip pin 5 on the 1R5 it is very easy to put it in the tube socket incorrectly. The voice of experience.
::
:::Bill VA.,
:::
:::As Norm mentioned in another post here, check for continuity between pins 1 and 5. If there is continuity, then the tube is most likely not a 1L6 possibly a 1R5. On another note, I have a 1R5 tube with pin 5 cut off that I use in place of the expensive 1L6 for the initial testing of a TO. I cut pin 5 off in case that pin on the socket was used as a tie point for other components. I believe a 1R5 can be used in the few radios that used a 1L6 and were broadcast band only.
:::
:::Radiodoc
:::***********
:::
:::
::::I picked up a caddy of tubes some time back. From it I have a Sylvania Tube box for a 1L6 with a tube in it. The tube looks like a 1L6 (and others), tests like a 1L6. Problem is I can't read 1L6 on the tube. I don't have a radio to test it with. The tube has been handled enough to smear off the lettering which does make me a little leary. However, I will make it available to someone to try in their Trans-Oceanic. If it works then what a deal I got for you.
::::Bill VA