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This can be a little complicated to fix. First, in a series circuit, the current is the same through each voltage drop. Also in a series circuit the sum of the individual voltage drops must equal the source voltage. (See Kirchhoff's Law) I believe in your Synchronome master clock system (if that is what you are using), the source voltage to the series slave units is adjustable so that the current to the slave clocks is maintained, if units are added or removed from the circuit. Generally all the slave units are the same. In your system the units are different, meaning the requirements have different currents for different brands of slaves.Synchronome and Gent slaves running in the same circuit. Circuit current is 0.3A...
rogerj's statement is correct. The voltage drops would only be the same if all series loads were the same. i.e. same model secondary or equal resistors, etc. Since the OP stated a mix of secondaries, not only different model of the same brand but of different brands and almost certainly different current requirements, I would expect different voltages, totaling the source voltage (Kirchhoff's law). I am not familiar with Synchronome or Gents secondaries or their systems so I have no idea of their individual voltage drops. Even though there are some unknowns [to me], this is a simple series circuit that even I can understand. So maybe I need to explain the circuit of post #2.In a series circuit with mixed slaves, specified for a certain working current, it is not necessary to have the same voltage across each device
The Synchronome statement referred to by Toughtool above is not an exact requirement, but an approximate one and so relatively unimportant.
Therefore, if you need to be exact with your current distribution, only a parallel resistor is needed across the slave with the lower current drive requirement.
Really! For one thing, "Good enough is not (good enough). It yells of incompetence, laziness, and in most cases both. I believe people visit the NAWCC forum to get correct and accurate information about the clocks and watches they adore. It is a disservice for someone to spout "relatively unimportant" information and I for one, do not want to recommend anyone to do something to their beloved time piece that is potentially damaging.I have found that mixing slave dial 'makes' is simply a case of not worrying too much about it!
After rethinking this problem, rogerj is right. Only a parallel resistor is needed. The starting point to solving this problem for H Danials is to find the voltage developed across he coil. Therefore the DC resistance of the coil needs to be measured, with a good quality Ohm meter.only a parallel resistor is needed across the slave with the lower current drive
You could connect a resistor across the coil. The value would depend on how well adjusted the dial mech is. Gents claim (in the online instructions I've read) that they should work reliably down to 0.13 amps. It also says the standard operating current in a Gents loop is 0.22 amps. So if the dial is set up well enough to operate at 0.13 amps you could place 3.9 ohms across it - the nearest preferred value available. If it doesn't work with 3.9 ohms, try 4.7 or 5.6Hi
I have Synchronome and Gent slaves running in the same circuit. Circuit current is 0.3A which is too much for the Gent which clunks noisily. How do you limit the current to the Gent which has a 4 ohm coil?
You may well consider me incompetent, lazy - even both. I don't come to these forums though laziness - and if you think me incompetant and lazy - frankly it isn't a very helpful reply to anyone.It yells of incompetence, laziness, and in most cases both.