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Replacement capacitor Rowe MM1
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BriMc
May 25, 2012, 1:33:38 PM5/25/12
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Hi Everyone,
Looking to see what everyone is using for a replacement capacitor on
the selector button unit of a Rowe MM1
The specs are 5 MFD 400w NPV NON POLAR. I have looked and cannot find
a replacement.
Brian
Looking to see what everyone is using for a replacement capacitor on
the selector button unit of a Rowe MM1
The specs are 5 MFD 400w NPV NON POLAR. I have looked and cannot find
a replacement.
Brian
lino...@yahoo.com
May 26, 2012, 7:16:49 PM5/26/12
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Brian, you can use two standard 10mfd caps with either the positive or negative terminals connected in series to make a 5 MFD BTW: That 400 is 400 Volts.
You can also make up this value by paralleling capacitors that are non-polarized such as mylar or others.
That cap controls the length of the pulse that punches the pin on the search unit.
The voltage rating is a bit of overkill in that the circuit is only approx 28 VDC but there is a large kick back spike of a couple hundred volts when the circuit disconnects after punching the pin.
Rob/NYC
You can also make up this value by paralleling capacitors that are non-polarized such as mylar or others.
That cap controls the length of the pulse that punches the pin on the search unit.
The voltage rating is a bit of overkill in that the circuit is only approx 28 VDC but there is a large kick back spike of a couple hundred volts when the circuit disconnects after punching the pin.
Rob/NYC
John Robertson
May 29, 2012, 6:28:22 PM5/29/12
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neg.) - this will produce a non-polarized capacitor of 5ufd @ 400WV
(Working Volts).
Look up caps in parallel and series to learn about this useful trick
(and others).
John :-#)#
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John Robertson
May 30, 2012, 12:54:29 AM5/30/12
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Perhaps a snubbing diode across the coil would help...if AC then two
diodes, anode-to-anode (or is it cathode-to-cathode?).
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