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Registered Member #72
Joined: Thu Feb 09 2006, 08:29AM
Location: UK St. Albans
Posts: 1659
PhilGood wrote ...
I guess it also depends on what you are using your MOT for.
Sort of. More strictly it depends how you are going to use your MOT.
If you are going to use it to drive a voltage doubler using the same size caps as were used in the original MO, then leave the shunts in to tune out the doubler cap series impedance which gets you a stiffer supply.
If you are going to simply full wave rectify the output and use it unsmoothed, then taking them out will give you a stiffer supply.
If that full wave rectifier is going to feed a large smoothing cap, so causing the rectifier diodes to take very pulsy current, then you will improve the supply power factor, and reduce the rectifier dissipation, by leaving the shunts in.
Registered Member #152
Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
Another alternative is to leave the shunts in, put 1 MO cap in series with the transformer and then the full wave bridge and smoothing caps. This way the shunts will still resonate with the series cap and you will get good power factor and a pretty low impedance supply.
Registered Member #4052
Joined: Thu Aug 11 2011, 04:43AM
Location: IN ,USA
Posts: 69
It may help you to decide if you understand exactly how difficult it is to remove the shunts. I think if I ever have need to do it again, I will start with cutting the core in half and just weld it back together later. Simply because it is almost impossible to drive them out without damaging the windings.
So, in conclusion: Pros- a lot more power Cons- it sucks!
Registered Member #4081
Joined: Wed Aug 31 2011, 06:40PM
Location: UK
Posts: 139
I removed the shunts on mine, got some very hot arcs! Then it burst into flames. So you'll get more current with more heating of the core. I guess just try it with and without the shunts if they're easy to remove.
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Removing MOT shunts, what are the pros and cons ?
