Question :
I have a Drake C line that has not been used in several years & would
like to put it back on-line. I will us a variac to bring the voltage up in
steps, can anyone give me procedure to follow.
Thanks in advance.
Answer
Here's a generic procedure...your mileage may vary [autotransformer =
variac]. Hopefully the Drake gurus will chime in with any peculiarities to
watch for.
GL -- Dino KLØS/4
Remove all tubes from the rig.
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Turn the knob on the autotransformer to zero. |
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Plug the autotransformer into the wall. |
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Plug the equipment into the autotransformer. |
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Turn on the equipment. |
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Very slowly turn the knob on the autotransformer up to 25 VAC. |
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As you turn, look and listen for smoke or sizzling. |
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Wait a few minutes. |
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Increase the voltage to 50 VAC. |
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Keep this up until you have full voltage on the equipment. |
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Moderately slowly turn the autotransformer down to minimum. |
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Turn off the equipment, unplug it and replace the RECTIFIER tubes. |
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Plug in and turn on the equipment. |
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Very slowly turn the knob on the autotransformer up to 25 VAC. |
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As you turn, look and listen for smoke or sizzling. |
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Wait a few minutes. |
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Increase the voltage to 50 VAC. |
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Keep this up until you have full voltage on the equipment. |
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Moderately slowly turn the autotransformer down to minimum. |
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Turn off the equipment, unplug it and replace the remaining tubes. |
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Perform the procedure again. |
GL -- Dino KLØS/4