Iam restoring a knight kit star roamer radio.The manual says to insert the if transformers according to the color dots on the botom of the transformers.When i removed them,the colored dots were not there. how important is it to have them?

:Iam restoring a knight kit star roamer radio.The manual says to insert the if transformers according to the color dots on the botom of the transformers.When i removed them,the colored dots were not there. how important is it to have them?

William:
The dots are there to align the IF transformers so that the primaries go to the tube plates, and the secondaries go to the grid of the IF tube, and the diode plates of the first audio tube. There are two windings in the tube, and one is the primary, the other the secondary. A schematic and an Ohmmeter should provide the right orientation and position of the IF transformers.
Lewis

I have noticed that the primaries tend to be the bottom coils.
On Many IF cans both primary and secondary are the same, so they can be connected both ways. In those cases the dots are there so one does not connect either the primary or secondary from the B+ plate supply of one tube to the grid of the next. That kind of error will wreck the IF.
If you merely get the primary and secondary swapped, you most likely will not notice the difference. Certainly you will not damage the IF. If one has a tap on one of the coils, that will also tell which is which.

Best Regards,

Bill Grimm

The sort answer is that ::Iam restoring a knight kit star roamer radio.The manual says to insert the if transformers according to the color dots on the botom of the transformers.When i removed them,the colored dots were not there. how important is it to have them?
:
:William:
:The dots are there to align the IF transformers so that the primaries go to the tube plates, and the secondaries go to the grid of the IF tube, and the diode plates of the first audio tube. There are two windings in the tube, and one is the primary, the other the secondary. A schematic and an Ohmmeter should provide the right orientation and position of the IF transformers.
:Lewis
:
:

:I have noticed that the primaries tend to be the bottom coils.
:On Many IF cans both primary and secondary are the same, so they can be connected both ways. In those cases the dots are there so one does not connect either the primary or secondary from the B+ plate supply of one tube to the grid of the next. That kind of error will wreck the IF.
:If you merely get the primary and secondary swapped, you most likely will not notice the difference. Certainly you will not damage the IF. If one has a tap on one of the coils, that will also tell which is which.
:
:Best Regards,
:
:Bill Grimm
:
:The sort answer is that ::Iam restoring a knight kit star roamer radio.The manual says to insert the if transformers according to the color dots on the botom of the transformers.When i removed them,the colored dots were not there. how important is it to have them?
::
::William:
::The dots are there to align the IF transformers so that the primaries go to the tube plates, and the secondaries go to the grid of the IF tube, and the diode plates of the first audio tube. There are two windings in the tube, and one is the primary, the other the secondary. A schematic and an Ohmmeter should provide the right orientation and position of the IF transformers.
::Lewis
::
::Thanks Guys
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