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Mr Scientist New Member
Call Sign : 26-CT-4322 Posts : 20 Times Thanked : 0 Join date : 2021-11-03 QTH or Location : Long Buckby, Northamptonshire Equipment Used : TH-446 PMR446/70 cm handheld transceiver
Subject: Caduceus Coil Antenna Wed Nov 10, 2021 6:26 pm
Hello avid readers of mine,
I was wondering if any of the members here, have any experience with Caduceus Coil Antennas..? If so what is your experience with them and what type did you build.
73s
Mr Scientist
Alan Pilot Major contributor
Call Sign : 163-CT-220...MW7TTA Posts : 2516 Times Thanked : 69 Join date : 2019-11-19 QTH or Location : Anglesey North Wales Equipment Used : Yaesu FT-991A,,Yaesu FTDX-10,,Icom ic-7300,,Anytone AT-D878UV PLUS",,LINCOLN II+. Age : 150
Subject: Re: Caduceus Coil Antenna Thu Nov 11, 2021 10:26 am
"avid readers of mine" lol. Caduceus coil practically consists of two coils wound in opposite directions. Their magnetic fields cancel out and so most of inductance is eliminated.
Magic ends there.
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Mr Scientist New Member
Call Sign : 26-CT-4322 Posts : 20 Times Thanked : 0 Join date : 2021-11-03 QTH or Location : Long Buckby, Northamptonshire Equipment Used : TH-446 PMR446/70 cm handheld transceiver
"avid readers of mine" lol. Caduceus coil practically consists of two coils wound in opposite directions. Their magnetic fields cancel out and so most of inductance is eliminated.
Magic ends there.
Hello Alan
My interest in the Caduceus coil is the claim it can eliminate several items on an antenna such as a Balun and an RF ferrite choke.
I'm experimenting with a 70cm dipole with a Caduceus coil, to see if anything how it performs in the wild.
73s...
Mr Scientist
SangueG Major contributor
Call Sign : 26-CT-3971 / 2E0LMI Posts : 1164 Times Thanked : 68 Join date : 2021-01-30 QTH or Location : Cirencester, Gloucestershire Equipment Used : Little radios, home-made antennas
Subject: Re: Caduceus Coil Antenna Fri Nov 12, 2021 6:58 am
Have to admit I had to look this up as hadn't heard of it before. As Alan suggests, don't think it will perform well. But.. there's only one way to find out. Let us know what you find with your 70cm experiment.
Alan Pilot Major contributor
Call Sign : 163-CT-220...MW7TTA Posts : 2516 Times Thanked : 69 Join date : 2019-11-19 QTH or Location : Anglesey North Wales Equipment Used : Yaesu FT-991A,,Yaesu FTDX-10,,Icom ic-7300,,Anytone AT-D878UV PLUS",,LINCOLN II+. Age : 150
Subject: Re: Caduceus Coil Antenna Fri Nov 12, 2021 7:28 am
Will you be transmitting on it or just RX.
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Mr Scientist New Member
Call Sign : 26-CT-4322 Posts : 20 Times Thanked : 0 Join date : 2021-11-03 QTH or Location : Long Buckby, Northamptonshire Equipment Used : TH-446 PMR446/70 cm handheld transceiver
Today at 10:10 pm by rabbi
Subject: Caduceus Coil Antenna 
