Does using a larger coil...ie, 13" Detech Ultimate versus my normal 4x6 or 6x10 cause the battery to run down quicker? I am using a V3i. Typically here in West Texas, I will go search for a couple hours or maybe 3 hours and go home. Then the next day, I can go again for the same length of time and sometimes even a third day with the same battery. There is so much trash on the vacant lots that we hunt that the typical settings are 6/55/75. I tried out a friend's 13" detech the other day and I still had 10 volts when I started, but after about 1-1/2 hours, the battery went down. I had backup batteries of course, but still, it seemed like the larger coil drained my battery quicker. Logic tells me that the transmit signal is going thru a lot larger coil of wires along with the receive signal, so logically it would cause quicker drain. Just wanted to get the "experts" opinions. Thanks.
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Coil size and battery life using V3i
- Thread starter shafer44
- Start date
gabbyhayes
Member
Actually it is probably just the opposite of what you might think.
The impedance of a larger coil should be higher because the wire is longer hence, more resistance.
If the impedance is higher there would be LESS current flow so your battery might last longer.
In actuality the impedance between the coils is probably similar so I wouldn't expect a big difference.
The impedance of a larger coil should be higher because the wire is longer hence, more resistance.
If the impedance is higher there would be LESS current flow so your battery might last longer.
In actuality the impedance between the coils is probably similar so I wouldn't expect a big difference.
gabbyhayes
Member
The Rx portion of the coils is on pins 1&2.
The TX portion is pins 4&5.
You can see the pin numbers if you use a magnifying glass.
The resistance and inductance of the coils are as follows:
Eclipse 5.3
RX= 30.8 ohms 14mh 40 Rings
TX=3.3 ohms 561uH 19 Rings
Eclipse 4x6
RX=50.9 ohms 15.6 mH 29 Rings
TX=3.3 ohms 545uH 17 Rings
Eclipse DD 6x10
RX=55.2 Ohms 14.0 mH 31 Rings
TX=3.4 ohms 550 uH 19 Rings
D2 Stock Coil
Rx=44.1 Omhs 13.73 mH 32 Rings
TX=3.3 Ohms 550uH 21 Rings
The rings is a "Q" test of the coils and is an indicator of shorted turns.
As you can see the TX and RX of all the coils is similar both for resistance and inductance.
This is from an old post of mine.
As you can see the resistance and inductance on the TX coil is all similar, so my earlier post should be accurate.
I don't know what the specs of the Detech coil are, but the difference between the whites coil's TX windings is minimal.
The TX portion is pins 4&5.
You can see the pin numbers if you use a magnifying glass.
The resistance and inductance of the coils are as follows:
Eclipse 5.3
RX= 30.8 ohms 14mh 40 Rings
TX=3.3 ohms 561uH 19 Rings
Eclipse 4x6
RX=50.9 ohms 15.6 mH 29 Rings
TX=3.3 ohms 545uH 17 Rings
Eclipse DD 6x10
RX=55.2 Ohms 14.0 mH 31 Rings
TX=3.4 ohms 550 uH 19 Rings
D2 Stock Coil
Rx=44.1 Omhs 13.73 mH 32 Rings
TX=3.3 Ohms 550uH 21 Rings
The rings is a "Q" test of the coils and is an indicator of shorted turns.
As you can see the TX and RX of all the coils is similar both for resistance and inductance.
This is from an old post of mine.
As you can see the resistance and inductance on the TX coil is all similar, so my earlier post should be accurate.
I don't know what the specs of the Detech coil are, but the difference between the whites coil's TX windings is minimal.