Experimental 40m Coil for MFJ1979

In this video we are going to build a 40m coil suitable for use with the MFJ-1979 Telescopic Whip Antenna. So come along for the ride.

Parts:
1 -- 1 - 1/4 PVC Pipe, 80mm. long
2 -- PVC End Plugs, https://www.homedepot.com/p/DURA-1-in... Note: I saw these in various sizes at my Home Depot.
2 -- 3/8-24 x 1.5" Bolt
4 -- 3/8 Flat Washer
4 -- 3/8-24 Hex Nut
2 -- 3/8 split washer
1 -- 3/8-24 Union. You can try this one: https://www.amazon.com/Hard-Find-Fast...

plus:
16AWG Magnet Wire, 20ft.
JB Weld or similar
Sources for Kapton Tapes: Amazon, Digi-Key or Mouser Electronics
(also called Polyimide Tape ) https://www.amazon.com/Resistant-poly...

Show Notes: The final inductance for this coil was 16.3uH. If you shoot for that you will be in the ballpark with the MFJ1979 whip fully extended. In my build this ended up being 14 turns of the magnet wire on a 1 - 1/4 PVC Pipe with end caps and hardware. See video for details and Happy experimenting!!


p.s. For those interested in the "puck" or "hub" that was used as a tripod, try W0AEZ.com.
He has a new one called "PolyPuck V2". For the legs of the tripod, I just went to McMaster-Carr website and ordered 10mm diameter Aluminum tubing in 24" length. If you go this route, you may have to guy the middle of your antenna in high winds ( 25mph) as the antenna can topple over. Otherwise, maybe 30" legs would be better. Or maybe a sand bag. You get the idea. Cheers!


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