K0BRA/AMRAD Active Antenna Parts List

  • ( ) C1 68 pfd ceramic capacitor, 2KV, RadioShack.com P/N 900-7197
  • ( ) C2, C3, C4 -- 1 ufd. 35 volt tantalum capacitor, Radio Shack P/N 272-1434,RadioShack.com P/N 900-2170
  • ( ) FB1 Ferrite Bead, Amidon FB43-287, RadioShack.com P/N 900-5008

(Extra beads may be added by some users to reduce high frequency performance.)

  • ( ) I1 NE-2 neon lamp, Radio Shack P/N 272-1102, RadioShack.com P/N 900-2628
  • ( ) Q1 CP-666 JFET, Crystalonics Inc., TO-5 case
  • ( ) R1 15 ohm 1/4 watt, RadioShack.com P/N 900-0174

(R1 may be replaced by some users with a choke to reduce higher frequency performance.)

  • ( ) R2 2.2 Megohm, 1/4 watt, RadioShack.com P/N 900-0298
  • ( ) R3 100 ohm, 1 watt, Radio Shack 2 pack, P/N 271-152, RadioShack.com P/N 900-0666
  • ( ) R4 47 K ohm 1/4 watt, Radio Shack 5 pack, P/N 271-1342, RadioShack.com P/N 900-0258
  • ( ) R5 50 K ohm potentiometer, RadioShack.com P/N 900-7460
  • ( ) T1 User made transformer, 17 turns #30 bifilar wire on Amidon FT50-75 or FT50-J core

Hardware:

  • ( ) 1 ea. 3/4 Inch copper water pipe 4-1/2 inches long fabricated to instructions
  • ( ) 1 ea. 1/4 - 20 x 1-1/2 inch brass bolt
  • ( ) 1 ea. BNC Jack, Chassis Mount, Radio Shack P/N 278-105
  • ( ) 1 ea. 1 inch Schedule 40 PVC pipe, 9 inches long
  • ( ) 1 ea. 1 inch Schedule 40 PVC pipe cap, top, fabricated to instructions
  • ( ) 1 ea. 1 inch Schedule 40 PVC pipe cap, bottom, fabricated to instructions
  • ( ) 2 ea. 1/2 inch Schedule 40 PVC pipe, 1 inch long

Suppliers: