Questions:
Where to place the "LOAD" control (0 to 10) for my TV-11 or the "PLATE" control (0 to 100) of my TC-1??? Because this control will change reading on the meter!! I can read bad or good depending where is the cursor on the control!!
What is this control for?
Thanks!
J-F
You did not mention which tube you were trying to test, but say you have a setting for a 45, but do not ahve a setting for a 300B, The characteristics between the tubes is close enough to allow for a load setting a little bit lower on the load dial than a 45, and then have some idea of approximate tube quality.
If pinouts are different from everything else, then it gets to be a whole new ball game. Take a 6HA5 for example, flip one of the switches to the wrong position, you burn out a portion of the tube, yet you can still the tube and get a reading that suggests it is operational.
Sometimes you can infer what the settings should be if you have a similar tester's data roll.
Nothing is as good as the offical published data for your tube, but the final arbitter is actually the device it is being used in.
:Hi! I have 2 simple tube testers. A Heatkit TC-1 and a Superior TV-11. When a tube is not listed on any roll chart, I check in my RCA Receiving tube manual for "basing diagram" (5B, 9A...). I set filament voltage, I place lever for filament and other levers to test usually the plate (P, G1 or...). This is Ok.
:
:Questions:
:
:Where to place the "LOAD" control (0 to 10) for my TV-11 or the "PLATE" control (0 to 100) of my TC-1??? Because this control will change reading on the meter!! I can read bad or good depending where is the cursor on the control!!
:
:What is this control for?
:
:Thanks!
:J-F
J-F
:Hi,
:The load control in a general sense is a rough calibration point. Depending on if the tube is designed to carry only a small current across the plate, the load setting gets placed higher, such as most detector diode tubes get set to the upper end of the spectrum, and the power rectifiers get set to the lower end. Such as the difference between the load settings for a 6AL5 compared to a 5U4. If there is a performance characteristic similar enough to another tube, such as a 6C5 and a 6J5 (they do have actual slight differences in most settings), but they can be tested with either settings to reasonably determine approximate quality.
:
:You did not mention which tube you were trying to test, but say you have a setting for a 45, but do not ahve a setting for a 300B, The characteristics between the tubes is close enough to allow for a load setting a little bit lower on the load dial than a 45, and then have some idea of approximate tube quality.
:
:If pinouts are different from everything else, then it gets to be a whole new ball game. Take a 6HA5 for example, flip one of the switches to the wrong position, you burn out a portion of the tube, yet you can still the tube and get a reading that suggests it is operational.
:
:Sometimes you can infer what the settings should be if you have a similar tester's data roll.
:
:Nothing is as good as the offical published data for your tube, but the final arbitter is actually the device it is being used in.
:
:
:
::Hi! I have 2 simple tube testers. A Heatkit TC-1 and a Superior TV-11. When a tube is not listed on any roll chart, I check in my RCA Receiving tube manual for "basing diagram" (5B, 9A...). I set filament voltage, I place lever for filament and other levers to test usually the plate (P, G1 or...). This is Ok.
::
::Questions:
::
::Where to place the "LOAD" control (0 to 10) for my TV-11 or the "PLATE" control (0 to 100) of my TC-1??? Because this control will change reading on the meter!! I can read bad or good depending where is the cursor on the control!!
::
::What is this control for?
::
::Thanks!
::J-F
Using a tube manual can help determine settings. A tube like 5AR4 can use the setting for 5V4G. 6DJ8 & 6AQ8 are similar to 6BQ7.
RCA tube manual RC-28 lists the base wiring of each tube. In back the manual shows all tubes using this wiring.
Norm
:Hi! There is some tubes not listed: 6CA4, 5AR4, 6BQ5, 35, 47, 6DJ8, 6AQ8. I created setting for theses tubes but I always put the LOAD control to 3 (so 30% of full scale). I don't know if my reading is good (because of the load control setting)... But I understand a bit more utility of this control with your explanation.
:
:J-F
:
::Hi,
::The load control in a general sense is a rough calibration point. Depending on if the tube is designed to carry only a small current across the plate, the load setting gets placed higher, such as most detector diode tubes get set to the upper end of the spectrum, and the power rectifiers get set to the lower end. Such as the difference between the load settings for a 6AL5 compared to a 5U4. If there is a performance characteristic similar enough to another tube, such as a 6C5 and a 6J5 (they do have actual slight differences in most settings), but they can be tested with either settings to reasonably determine approximate quality.
::
::You did not mention which tube you were trying to test, but say you have a setting for a 45, but do not ahve a setting for a 300B, The characteristics between the tubes is close enough to allow for a load setting a little bit lower on the load dial than a 45, and then have some idea of approximate tube quality.
::
::If pinouts are different from everything else, then it gets to be a whole new ball game. Take a 6HA5 for example, flip one of the switches to the wrong position, you burn out a portion of the tube, yet you can still the tube and get a reading that suggests it is operational.
::
::Sometimes you can infer what the settings should be if you have a similar tester's data roll.
::
::Nothing is as good as the offical published data for your tube, but the final arbitter is actually the device it is being used in.
::
::
::
:::Hi! I have 2 simple tube testers. A Heatkit TC-1 and a Superior TV-11. When a tube is not listed on any roll chart, I check in my RCA Receiving tube manual for "basing diagram" (5B, 9A...). I set filament voltage, I place lever for filament and other levers to test usually the plate (P, G1 or...). This is Ok.
:::
:::Questions:
:::
:::Where to place the "LOAD" control (0 to 10) for my TV-11 or the "PLATE" control (0 to 100) of my TC-1??? Because this control will change reading on the meter!! I can read bad or good depending where is the cursor on the control!!
:::
:::What is this control for?
:::
:::Thanks!
:::J-F