HF Antenna Micro-Traps - DIY Build Project

This is the one you've been waiting for - the traps to go with the micro End Fed Halfwave (EFHW) antenna build. Here's how to make them.
These traps will work with my Ultimate Ultralight EFHW ( • Ultimate UL Portable R... ) or just about any QRP end-fed halfwave antenna, and you could even build pairs to use with a dipole.
LINKS:
LC Resonance Calculator: www.omnicalcul...
Toroid Winding Calculator: www.66pacific.c...
You'll certainly need some MATERIALS:
T37-2 Toroids (my usual): amzn.to/3hFsYlj
T50-2 Toroids (a little more efficient and maybe easier to build): amzn.to/2QCkGio
28 ga Magnet Wire: amzn.to/3b9Isf4
39pF 100v Ceramic Capacitor (0603 case recommended): www.digikey.co...
NOTE: 100v is marginal for 5w. Consider a 500v or 1kv for better durability and/or higher power.
500v: www.digikey.co...
62pF 100v Ceramic Capacitor (0603 case recommended): www.digikey.co...
NOTE: Again, 500v model is needed for 10 or 15w. www.digikey.co...
Also, consider a few other capacitors in the 22pF - 100pF range, depending on the traps you'd like to build.
Perforated Prototype Board: amzn.to/35lcvzn
5/8" Heat Shrink Tubing: amzn.to/3lwwGjt
1/4" Heat Shrink Tubing: amzn.to/2G9bGzk
And you'll need some TOOLS:
Dremel (or similar)high-speed rotary tool: amzn.to/3gFEkEL
NOTE: I have had my Dremel tool for about 25 years now and it hasn't missed a beat. Based on my personal experience, I would recommend going with the name brand tool.
Diamond Cutting Wheels: amzn.to/2QBRHve
NOTE: I really like these because you can't cut yourself with them, but they cut the perf board and BNC connector brass just fine.
Soldering Iron (any will do) with a fine tip: amzn.to/2GaENlN
NOTE: I've been using this one for about a year with no issues. The heat gun is AWESOME for hot air/solder paste construction. The iron works well for traditional soldering.
Electronics Tweezer Set: amzn.to/2ENy00w
Please share your builds with me when you're done, and tell us about how it works out for you in the comments below.
Thanks!
de K6ARK