A resistor line cord can be replaced by a resistor but it will be hot. A capacitor or diode/cap combination can be used but will cause surge problems burning out a lamp on turn on. Protection can be added. Diode might also cause noise.
The best way would be converting to 150 ma tubes. 25Z6 can be 50Y6, 25L6 use 35L6 or even 50L6, 6A8 to 12A8, 6K7 to 12K7 and 6Q7 to 12Q7, That way you operate the tubes directly off of 115 volt AC line, no added resistance needed.
Norm
:I have an Emerson radio with a defective line cord. It has a 25Z6, 25L6, 6A8, 6K7, and 6Q7 tubes. I've been told the simplest thing to do is convert it into an "All American Five" radio. Also, I've read the article on Nostalgia Air where you add a non-polarized electrolyic. The resistance of the line cord was 190 ohm and was tapped at 150 ohm for the pilot light.
:What method is the best to use and what are the pros and cons of each?
:Hi Butch
:
: A resistor line cord can be replaced by a resistor but it will be hot. A capacitor or diode/cap combination can be used but will cause surge problems burning out a lamp on turn on. Protection can be added. Diode might also cause noise.
:
: The best way would be converting to 150 ma tubes. 25Z6 can be 50Y6, 25L6 use 35L6 or even 50L6, 6A8 to 12A8, 6K7 to 12K7 and 6Q7 to 12Q7, That way you operate the tubes directly off of 115 volt AC line, no added resistance needed.
:
:Norm
:
:
::I have an Emerson radio with a defective line cord. It has a 25Z6, 25L6, 6A8, 6K7, and 6Q7 tubes. I've been told the simplest thing to do is convert it into an "All American Five" radio. Also, I've read the article on Nostalgia Air where you add a non-polarized electrolyic. The resistance of the line cord was 190 ohm and was tapped at 150 ohm for the pilot light.
::What method is the best to use and what are the pros and cons of each?
You could use a 35Z5, as long as both sections of your 25Z6 are tied together but it requires a wire change. Looks like all you would have to do is remove any wires connected to pin #3 on your 25Z6 socket.
Norm
:Norm:
:Thanks for the info. Could I use a 35Z5 and 50L6 together with the other tubes you mentioned? Besides wiring the pilot light in, would I need to do anything else?
:Thanks again, Butch
:
::Hi Butch
::
:: A resistor line cord can be replaced by a resistor but it will be hot. A capacitor or diode/cap combination can be used but will cause surge problems burning out a lamp on turn on. Protection can be added. Diode might also cause noise.
::
:: The best way would be converting to 150 ma tubes. 25Z6 can be 50Y6, 25L6 use 35L6 or even 50L6, 6A8 to 12A8, 6K7 to 12K7 and 6Q7 to 12Q7, That way you operate the tubes directly off of 115 volt AC line, no added resistance needed.
::
::Norm
::
::
:::I have an Emerson radio with a defective line cord. It has a 25Z6, 25L6, 6A8, 6K7, and 6Q7 tubes. I've been told the simplest thing to do is convert it into an "All American Five" radio. Also, I've read the article on Nostalgia Air where you add a non-polarized electrolyic. The resistance of the line cord was 190 ohm and was tapped at 150 ohm for the pilot light.
:::What method is the best to use and what are the pros and cons of each?
I'm a real freak about keeping things original, so personally I'd add a resistor on top of the chassis, and keep the tube arrangement original. With those .3 ampere tubes, I'd go for something more like a 20 watt resistor, which can be had by placing two 380 ohm resistors of the 10 watt variety in parallel. This will get you your 190 ohms (I think that's what you said). If you want to keep it really original, you can try Antique Electronic Supply and see if they may even have a line cord resistor for your set. Several years ago I remember them advertising these (NOS), but I don't know if they have any now. You can ask them and see if they may have a few still lying around. Though I like originality, I personally wouldn't go this route. I never did get the concept of the line cord resistor. Sounds kinda unsafe.
If you want to put in the .15 ampere tubes, with the 35Z5 tube, the pilot light is connected across pins 2 and 3. Pin 3 is then connected to the plate. The plate is NOT CONNECTED DIRECTLY TO THE LINE. The pilot light to use would then be the #47 6.3 volt .15 ampere lamp.
:Hi Butch
:
: You could use a 35Z5, as long as both sections of your 25Z6 are tied together but it requires a wire change. Looks like all you would have to do is remove any wires connected to pin #3 on your 25Z6 socket.
:
:Norm
:
::Norm:
::Thanks for the info. Could I use a 35Z5 and 50L6 together with the other tubes you mentioned? Besides wiring the pilot light in, would I need to do anything else?
::Thanks again, Butch
::
:::Hi Butch
:::
::: A resistor line cord can be replaced by a resistor but it will be hot. A capacitor or diode/cap combination can be used but will cause surge problems burning out a lamp on turn on. Protection can be added. Diode might also cause noise.
:::
::: The best way would be converting to 150 ma tubes. 25Z6 can be 50Y6, 25L6 use 35L6 or even 50L6, 6A8 to 12A8, 6K7 to 12K7 and 6Q7 to 12Q7, That way you operate the tubes directly off of 115 volt AC line, no added resistance needed.
:::
:::Norm
:::
:::
::::I have an Emerson radio with a defective line cord. It has a 25Z6, 25L6, 6A8, 6K7, and 6Q7 tubes. I've been told the simplest thing to do is convert it into an "All American Five" radio. Also, I've read the article on Nostalgia Air where you add a non-polarized electrolyic. The resistance of the line cord was 190 ohm and was tapped at 150 ohm for the pilot light.
::::What method is the best to use and what are the pros and cons of each?
I'm a real freak about keeping things original, so personally I'd add a resistor on top of the chassis, and keep the tube arrangement original. With those .3 ampere tubes, I'd go for something more like a 20 watt resistor, which can be had by placing two 380 ohm resistors of the 10 watt variety in parallel. This will get you your 190 ohms (I think that's what you said). If you want to keep it really original, you can try Antique Electronic Supply and see if they may even have a line cord resistor for your set. Several years ago I remember them advertising these (NOS), but I don't know if they have any now. You can ask them and see if they may have a few still lying around. Though I like originality, I personally wouldn't go this route. I never did get the concept of the line cord resistor. Sounds kinda unsafe.
If you want to put in the .15 ampere tubes, with the 35Z5 tube, the pilot light is connected across pins 2 and 3. Pin 3 is then connected to the plate. The plate is NOT CONNECTED DIRECTLY TO THE LINE. The pilot light to use would then be the #47 6.3 volt .15 ampere lamp. Pin 2 is connected to the line, and pin 7 is connected to the next tube (50L6). 12SQ7 is the last tube with one side of the filament connected to ground (the other side of the line). This tube must be at this end because it is the first audio amp, and any stray filament voltage will cause hum. If you want G style tubes, you can try the 50C6G tube in place of the 50L6 tube. This tube is more readily available in the G style. If you can find a 35Z5 in the G style, this will be a miracle. It can be had, though. Amazingly I did find a 12SA7G tube! It's the only one I've ever seen. A man I know has it in his tube collection. I assume your smaller tubes will be metal, though.
Thomas
:Hi Butch
:
: You could use a 35Z5, as long as both sections of your 25Z6 are tied together but it requires a wire change. Looks like all you would have to do is remove any wires connected to pin #3 on your 25Z6 socket.
:
:Norm
:
::Norm:
::Thanks for the info. Could I use a 35Z5 and 50L6 together with the other tubes you mentioned? Besides wiring the pilot light in, would I need to do anything else?
::Thanks again, Butch
::
:::Hi Butch
:::
::: A resistor line cord can be replaced by a resistor but it will be hot. A capacitor or diode/cap combination can be used but will cause surge problems burning out a lamp on turn on. Protection can be added. Diode might also cause noise.
:::
::: The best way would be converting to 150 ma tubes. 25Z6 can be 50Y6, 25L6 use 35L6 or even 50L6, 6A8 to 12A8, 6K7 to 12K7 and 6Q7 to 12Q7, That way you operate the tubes directly off of 115 volt AC line, no added resistance needed.
:::
:::Norm
:::
:::
::::I have an Emerson radio with a defective line cord. It has a 25Z6, 25L6, 6A8, 6K7, and 6Q7 tubes. I've been told the simplest thing to do is convert it into an "All American Five" radio. Also, I've read the article on Nostalgia Air where you add a non-polarized electrolyic. The resistance of the line cord was 190 ohm and was tapped at 150 ohm for the pilot light.
::::What method is the best to use and what are the pros and cons of each?