Must you Stick to the instructions (or make an informed guess) to have the essential turns, you may find in some instances which the new coil operates hotter than envisioned. If this takes place, merely include more turns - a boost of fifty% is probably going to be pretty alright.
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For the reason that line socket is now not obtainable if missing, there is solely no Risk-free way to connect mains to the clock. Although the connector is existing, it is too unsafe to utilize with mains voltages.
You will find a tiny complication, in that the Hammond works by using the stray AC magnetic area to function the alarm buzzer, but This could not affect the final consequence.
one.27W All over again, all is perfectly in expectations, so this way too is deemed successful. Added photographs weren't taken, Because the coil appears to be like Just about identical to that within the Telechron, and this kind of repetition has a tendency to be somewhat cumbersome.
Higher than you can see the various bits of the dismantled motor. Preliminary assessments are carried out (as explained down below) along with the test winding is concluded.
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Take note that every one descriptions in this post assume 16V Procedure. You have got to adapt the process explained to suit the various electricity source in case you need to use some thing besides 16V.
Prior to the new coil is wound, we are going to have to have to make a former. Due to the low voltage made use of, Practically any out there content will probably be wonderful. Ideal alternatives are significant density cardboard (not corrugated), thin fibreglass or other plastic, fibreboard, and so on. There's nothing significant about the former, only that it'll match more than the motor laminations and is powerful more than enough to remain collectively while The brand new coil is wound.
It's actually not extremely loud, but For the reason that clock dates back to the Significantly quieter time I think it would've been fairly suitable.
The downside is always that it doesn’t Use a snooze purpose as well as ticking is usually annoying. Also, you have got to verify the batteries don’t die, since that’s its only energy resource.
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Once more, presented the age of your clock and its insulation, it cannot be thought of honest. The outer insulation throughout the coil was so brittle that it just fell to parts if the coil was removed from the housing and magnetic pole-parts.
Using the clock motor operating, evaluate the voltage throughout the one ohm resistor. You must have a reading someplace among 15-25mV for 220-240V 50Hz motors. I can't give an precise determine for a hundred and ten-120V 60Hz motors since I don't have entry to 60Hz electrical power, but I might guess that The existing should be around double that of the nominal 230V motor (i.