Ensemble RXTX - Bill of Materials
Band: 30, 20, 17m

Bill of Materials Pages

The components in this kit have been organized in these pages into three different presentations:

  • Full Kit Inventory: lists all component counts included in the kit (even though some may nbot be required, depending upon the band option selected)
  • Band-Specific BOM Cross=reference: lists each part, by designation (e.g., R01, C01, T01, etc) and showing, for each part, the Build Stage in which the part is used.
  • Band-Specific BOM: (this page) lists component counts required to support the selected band option
     

In addition, each build stage and each build step therein will present a stage/step-specific BOM for the selected Band Option.

DX Shipments Are in 2 Mailings

If you are a non-US builder, please note that Ensemble kit shipments to DX locations are done in two mailings:

  • The first mailing includes the circuit board, ICs and capacitors.
  • The second mailing includes the resistors, connectors, cores/wire, and hardware.

Ferrites

The kit is furnished with a sufficient variety of toroids to enable the builder to build it for any one of the four major "bands". The correct count of ferrites (toroids and binocular cores is as follows:

Ferrite Type Quantity Color/O.D.
T25-2 2 Red/0.25"
T25-6 2 Yellow/0.25"
T30-2 4 Red/0.3"
T30-6 2 Yellow/0.3"
T37-2 2 Red/0.37"
T37-6 2 Yellow/0.37"
BN-43-2402 5 n/a
BN-61-2402 3 n/a

Note that the binocular cores are of two different types (type 43 and type 61). They have NO distinguishing markings and come in the kit in two separate bags. To be safe, you should decide which type to mark and then place an identifying marking (or piece of tape) on the binocular cores of the selected type just in case the cores get mixed up. Once they are out of their bags, you can easily get them mixed up!.

Note also that the one 100k 1/6W 5% resistor is called for (it is R-Test in the TX OpAmps stage) in performing a test and is NOT included with the kit.

There has been considerable discussion on the Softrock40 Group concerning matching of the BS170s to be used in the PA Stage as Q7 abd Q8, The data sheet for the BS170 shows a very wide tolerance for the Gate Threshold Voltage. It seems in most cases this is fairly tightly controlled but some vary from "typical" while still being well within the actual specification. Some randomly selected ones have given variations Tony considers excessive.. Alan, G4ZFQ, has summarized the design of a simple test circuit you might want to consider using in selecting the best matched pair of BS170s out of the batch provided in the kit

Ensemble RXTX Bill of Materials

The following table shows counts for each component required for the Ensemble RXTX (30, 20, 17m band option).

Check Type Category Component Count Marking Image
[  ] boardhdw HDW #4 nylon washer 1
[  ] boardhdw HDW 4 X #4-40 hdw (nut, bolt, washer, spacer) 1 4 X #4-40 hdw (nut, bolt, washer, spacer)
[  ] Capacitor Ceramic 82 pF 2 82J 82 pF
[  ] Capacitor Ceramic 100 pF 5% 4 101 100 pF 5%
[  ] Capacitor Ceramic 150 pF 5% 2 151 (may be blue or tan) 150 pF 5%
[  ] Capacitor Ceramic 180 pF 5% 1 181 180 pF 5%
[  ] Capacitor Ceramic 220 pF 5% 4 221 220 pF 5%
[  ] Capacitor Ceramic 330 pF 5% 2 331 330 pF 5%
[  ] Capacitor Ceramic 1000 pF 5% 2 102 1000 pF 5%
[  ] Capacitor SMT 1206 0.01 uF 7 (smt) no stripe 0.01 uF
[  ] Capacitor Ceramic 0.01 uF 1 103 0.01 uF
[  ] Capacitor Ceramic 0.022 uF 5% 4 223 0.022 uF 5%
[  ] Capacitor Ceramic 0.047 uF 5% 2 473 0.047 uF 5%
[  ] Capacitor SMT 1206 0.1 uF 22 (smt) black stripe 0.1 uF
[  ] Capacitor Ceramic 4.7 uF 10% 16V X7R RAD 7 475 4.7 uF 10% 16V X7R RAD
[  ] Capacitor Electrolytic 10uF/16 VDC 17 10uF/16 VDC
[  ] connector Socket socket, machine, 8 pin 1 socket, machine, 8 pin
[  ] connector Jack-RA 3.5mm stereo jack - PCB mount (rt-angle) 3 3.5mm stereo jack - PCB mount (rt-angle)
[  ] Connector Jack-RA DC Power Jack PCB Mount (rt-angle) 2.5mm 1 DC Power Jack PCB Mount (rt-angle) 2.5mm
[  ] Connector BNC-RA bnc connector pcb (rt-angle) 1 bnc connector pcb (rt-angle)
[  ] Connector Plug DC Power Plug 5.5/2.5mm Pos Ctr 1 DC Power Plug 5.5/2.5mm Pos Ctr
[  ] connector Jack-RA USB-B pcb jack (rt-angle) 1 USB-B pcb jack (rt-angle)
[  ] Diode Axial 1N4003 2 1N4003 1N4003
[  ] Diode Axial BZX55C3V3 3.3V zener diode 2 BZX55C BZX55C3V3 3.3V zener diode
[  ] heatsink TO-18 heatsink for driver transistor 1 heatsink for driver transistor
[  ] Heatsink TO-220 TO-220 heatsink for flat transistors 1 TO-220 heatsink for flat transistors
[  ] Heatsink Misc TO-220 heatsink Silpad 1 TO-220 heatsink Silpad
[  ] IC TO-92 LM78L05 voltage regulator 1 LM78L05 LM78L05 voltage regulator
[  ] IC SOIC-16 FST3253 mux/demux switch 2 FST3253 FST3253 mux/demux switch
[  ] IC SOIC-8 TLV2462CD dual opamp 2 TVL2462CD TLV2462CD dual opamp
[  ] IC SOIC-8 LT6231 dual op-amp 1 LT6231 LT6231 dual op-amp
[  ] IC SOIC-14 74AC74 Dual D FF 1 74AC74 74AC74 Dual D FF
[  ] IC DIP 8 ATtiny 85-20 PU w/V15.12 Firmware 1 AVR ATTINY85-20PU ATtiny 85-20 PU w/V15.12 Firmware
[  ] IC DIP-4 LTV-817 Opto-Isolator 1 LTV 817 LTV-817 Opto-Isolator
[  ] IC SOT-23-5 LP2992AIM5-3.3V regulator 1 LFEA LP2992AIM5-3.3V regulator
[  ] IC I2C Si570 Programmable Oscillator 1 SiLabs 570 Si570 Programmable Oscillator
[  ] inductor Binocular core BN-43-2402 (no markings!) 2 none BN-43-2402 (no markings!)
[  ] inductor Toroid T25-6 toroid core 2 yellow T25-6 toroid core
[  ] inductor Toroid T30-6 toroid core 2 yellow T30-6 toroid core
[  ] inductor Toroid T37-6 toroid core 2 yellow T37-6 toroid core
[  ] inductor Toroid T37-2 toroid core 2 red T37-2 toroid core
[  ] inductor Binocular core BN-61-2402 (no Markings!) 3 none BN-61-2402 (no Markings!)
[  ] inductor Xfrmr 0.6uH: 14T/2x7T bifilar #30 on T25-6 (yellow) 8" 1 yellow
[  ] Inductor Coil 0.6uH: 14T #26 on T37-6 (yellow) 2 yellow 0.6uH: 14T #26 on T37-6 (yellow)
[  ] Inductor Coil 0.78uH 17T #30 on T25-6 (yellow) 1 yellow 0.78uH 17T #30 on T25-6 (yellow)
[  ] inductor Coil 0.9uH: 15T #26(10 in) on T37-2 (red) 2 red
[  ] Inductor Coil 1.6uH 21T #30 on T30-6 (yellow) 1 yellow 1.6uH 21T #30 on T30-6 (yellow)
[  ] Inductor Xfrmr 1.74uH 11T bifilar/22T #30 on T30-6(yellow) 1 yellow 1.74uH 11T bifilar/22T #30 on T30-6(yellow)
[  ] Inductor xfrmr 4T bifilar #30 on BN-61-2402 1 4T bifilar #30 on BN-61-2402
[  ] Inductor Xfrmr 2T Bifilar #30 on BN-43-2402 1 2T Bifilar #30 on BN-43-2402
[  ] Inductor Xfrmr 3T bifilar/5T #30 0n BN-61-2402 1 3T bifilar/5T #30 0n BN-61-2402
[  ] Inductor Xfrmr 6T/3T bifilar #30 on BN-61-2402 1 6T/3T bifilar #30 on BN-61-2402
[  ] Inductor Choke 4T #26 on BN-43-2402 1 4T #26 on BN-43-2402
[  ] Resistor 1/4W 2.2 ohm 1/4W 5% 2 red-red-gld-gld 2.2 ohm 1/4W 5%
[  ] Resistor 1/4W 10 ohm 1/4W 1% 4 br-blk-blk-gld-br 10 ohm 1/4W 1%
[  ] Resistor 1/4W 22.1 ohm 1% 1 red-red-brn-gld-brn 22.1 ohm 1%
[  ] Resistor 1/4W 33.2 ohm 1% 1 ora-ora-red-gld-brn 33.2 ohm 1%
[  ] Resistor 1/4W 49.9 ohm 1% 6 yel-wht-wht-gld-brn 49.9 ohm 1%
[  ] Resistor 1/4W 56.2 1/4W 1% 1 grn-blu-red-gld-brn 56.2 1/4W 1%
[  ] Resistor 1/6W 68 1/6W 5% 4 bl-gry-blk-gld 68 1/6W 5%
[  ] Resistor 1/4W 68.1 1/4W 1% 1 blu-gry-brn-gld-brn 68.1 1/4W 1%
[  ] Resistor 1/6W 100 1/6W 5% 2 br-blk-br-gld 100 1/6W 5%
[  ] Resistor 1/4W 221 1/4W 1% 3 red-red-brn-blk-brn 221 1/4W 1%
[  ] Resistor 1/4W 475 1/4W 1% 2 y-v-grn-bl-br 475 1/4W 1%
[  ] Resistor 1/4W 1 k 1/4W 1% 3 br-blk-blk-br-br 1 k 1/4W 1%
[  ] Resistor 1/6W 2.2k 1/6W 5% 4 red-red-red-gld 2.2k 1/6W 5%
[  ] Resistor 1/4W 2.21 k 1/4W 1% 5 r-r-br-br-br 2.21 k 1/4W 1%
[  ] Resistor 1/4W 3.32 k 1/4W 1% 1 ora-ora-red-brn-brn 3.32 k 1/4W 1%
[  ] Resistor 1/6W 4.7k 1/6W 5% 3 yel-vio-red-gld 4.7k 1/6W 5%
[  ] Resistor 1/4W 4.99 k 1/4W 1% 5 y-w-w-br-br 4.99 k 1/4W 1%
[  ] Resistor 1/4W 10 k 1/4W 1% 11 br-blk-blk-r-br 10 k 1/4W 1%
[  ] Resistor 1/4W 22.1 k 1/4W 1% 3 r-r-brn-r-br 22.1 k 1/4W 1%
[  ] resistor 1/6W 100k 1/6W 5% 1 brn_blk_yel_gld 100k 1/6W 5%
[  ] Resistor 1/6W 1 M 1/6W 5% 1 brn-blk-grn-gld 1 M 1/6W 5%
[  ] SET HDW #6 screw, hex nut, starwasher 1
[  ] Transistor TO-92 2N3904 NPN Transistor 2 2N3904 2N3904 NPN Transistor
[  ] Transistor TO-92 2N3906 PNP transistor 2 2N3906 2N3906 PNP transistor
[  ] Transistor TO-18 2N2222 NPN transistor 1 2N2222 NPN transistor
[  ] Transistor TO-92 BS170 N-Channel Enhancement Mode FET 6 BS170 BS170 N-Channel Enhancement Mode FET
[  ] wire Cutoff shunt wire (cut-off lead) 4