In this video I'll walk you through each part you'll need to create and build your own 40M band pass filter. I'll explain step-by-step what I did to build and test this handy filter for field day fun when your smack in the middle of a group of radio's. Keep watching!
Chapter markers:
00:00 Parts Intro
00:58 Research Articles
02:13 Design Software
04:58 Winding Toroids
10:23 Building Test Circuit
14:40 Testing With VNA
17:30 Testing With RigExpert
21:36 Building Box
23:05 Installing Circuit
26:22 Gluing Circuit
27:00 Field Testing
28:33 Summary
Links to helpful sites:
Toroid Winding Calculator [ Ссылка ]
Butterworth BPF Design [ Ссылка ]
Elsie Elec. Filter Design Software [ Ссылка ]
Equipment Needed:
High Precision L/C Meter
Multi-meter
Capacitors 500V (Silver Mica or NPO Ceramics)
Iron Powder Toroid Type 6
Soldering Iron / Solder / Flux
Aluminum Project box
2x SO239s
Enameled Magnet Wire (I used 20awg)
Hot Glue Gun
VNA
Ready-To-Go Bandpass Filters:
DX Engineering [ Ссылка ]
5 Pole Kit Price
Item Each Used
Capacitor (100pF 500V) $0.90 1 $0.90
Capacitor (1k pF 500V) $1.00 4 $4.00
Inductor (T80-6) $1.45 3 $4.35
Inductor (T130-6) $3.60 2 $7.20
Screws $0.08 8 $0.64
Locking nuts $0.08 8 $0.64
Magnet wire 20awg $2.20 1 $2.20
SO 239 $3.00 2 $6.00
Zip tie stand-offs $0.10 5 $0.52
Copper plate .5mm $7.69 0.1 $0.77
Project box (Aluminum) $19.67 1 $19.67
Total $46.88
MY GO-BAG OF STUFF:
Yaesu FT-891 [ Ссылка ]
Jackite 31' Pole: [ Ссылка ]
Antenna Analyzer: RigExpert AA-55 ZOOM [ Ссылка ]
Battery: Miady 12V 8Ah Deep Cycle LiFePO4 Battery
Drone: DJI Mini 2 [ Ссылка ]
Paracord from Paraworld [ Ссылка ]
Arbor weight: [ Ссылка ]
CAMERA AND DRONE:
Canon M50: [ Ссылка ]
Neewer Tripod: [ Ссылка ]
DJI Mini 2 Fly More Package: [ Ссылка ]
3D PRINTER:
3D Printer: Creality Ender 3 pro 3D [ Ссылка ]
3D Printer Filament: HATCHBOX PLA 3D Printer Filament [ Ссылка ]
FreeCAD: [ Ссылка ]
STUDIO EQUIPMENT:
Canon M50: [ Ссылка ]
BM Premium 2-Pack of LP-E12 Batteries: [ Ссылка ]
NP-F550 Artman Battery Charger: [ Ссылка ]
Portkeys 4K HDMI Camera Monitor: [ Ссылка ]
Pixel G2 Pocket RGB Camera Light: [ Ссылка ]
Aputure AL-F7 256 LED Bi-Color Light: [ Ссылка ]
Blackmagic Design Davinci Resolve 17 Studio: [ Ссылка ]
