Bill of Materials Introduction


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:

  1. The first mailing includes the circuit board, ICs and capacitors.
  2. The second mailing includes the resistors, connectors, cores/wire, and hardware.
  3. 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 TypeQuantity

    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.

    Band-Specific "SUB-BOMs"

    below are links to the "sub bills of material" for the band-specific components of the kit:"

    1. 160 m Bill of Materials
    2. 80/40 m Bill of Materials
    3. 40/30/20m Bill of materials
    4. 30/20/17 m Bill of Materials
    5. 15/12/10 m Bill of Materials

    (The SUB-BOMs include the components for applicble, external lowpass filters. A Lowpass filter is needed if you intend to operate in:

    • The 80m band after building the 80m/40m option
    • The 40m band after building the 40m/30m/20m option
    • The 30m band after building the 30m/20m/17m option

    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.

    (go directly to build notes) (go directly to build notes)

    Bill of Materials

    Ensemble RXTX Component Inventory Summary

    (resistor images and color codes courtesy of WIlfried, DL5SWB's R-Color Code program)

    boardhdw-HDW#4 nylon washer1
    boardhdw-HDW4 X #4-40 hdw (nut, bolt, washer, spacer) 1
    Capacitor-Ceramic100 pF 5%101 1012
    Capacitor-Ceramic220 pF 5%221 2212
    Capacitor-Ceramic1000 pF 5%102 1022
    Capacitor-Ceramic0.01 uF103 1031
    Capacitor-Ceramic0.022 uF 5%223 2234
    Capacitor-Ceramic0.047 uF 5%473 4732
    Capacitor-Ceramic4.7 uF 10% 16V X7R RAD475 4757
    Capacitor-Electrolytic10uF/16 VDC 17
    Capacitor-SMT 12060.01 uF(smt) (smt)7
    Capacitor-SMT 12060.1 uF(smt) black stripe (smt) black stripe18
    Connector-BNC-RAbnc connector pcb (rt-angle) 1
    connector-Jack-RA3.5mm stereo jack - PCB mount (rt-angle) 3
    connector-Jack-RADC Power Jack PCB Mount (rt-angle) 1
    connector-Jack-RAUSB-B pcb jack (rt-angle) 1
    connector-PlugDC Power Plug 5.5/2.1mm Pos Ctr 1
    connector-Socketsocket, machine, 8 pin 1
    Diode-Axial1N40031N4003 1N40032
    Diode-AxialBZX55C3V3 3.3V zener diodeBZX55C BZX55C2
    Heatsink-MiscTO-220 heatsink Silpad 1
    heatsink-TO-18heatsink for driver transistor 1
    Heatsink-TO-220TO-220 heatsink for flat transistors 1
    IC-DIP 8ATtiny 85-20 PU w/V15.12 FirmwareAVR ATTINY85-20PU AVR ATTINY85-20PU1
    IC-DIP-4LTV-817 Opto-IsolatorLTV 817 LTV 8171
    IC-I2CSi570 Programmable OscillatorSiLabs 570 SiLabs 5701
    IC-SOIC-1474AC74 Dual D FF74AC74 74AC741
    IC-SOIC-16FST3253 mux/demux switchFST3253 FST32532
    IC-SOIC-8LT6231 dual op-ampLT6231 LT62311
    IC-SOIC-8TLV2462CD dual opampTVL2462CD TVL2462CD2
    IC-SOT-23-5LP2992AIM5-3.3V regulatorLFEA LFEA1
    IC-TO-92LM78L05 voltage regulatorLM78L05 LM78L051
    inductor-Binocular coreBN-43-2402 (no markings!)none none2
    Resistor-1/4W2.2 ohm 1/4W 5%red-red-gld-gld red-red-gld-gld2
    Resistor-1/4W10 ohm 1/4W 1%br-blk-blk-gld-br br-blk-blk-gld-br2
    Resistor-1/4W22.1 ohm 1%red-red-brn-gld-brn red-red-brn-gld-brn1
    Resistor-1/4W33.2 ohm 1%ora-ora-red-gld-brn ora-ora-red-gld-brn1
    Resistor-1/4W49.9 ohm 1%yel-wht-wht-gld-brn yel-wht-wht-gld-brn6
    Resistor-1/4W56.2 1/4W 1%grn-blu-red-gld-brn grn-blu-red-gld-brn1
    Resistor-1/4W221 1/4W 1%red-red-brn-blk-brn red-red-brn-blk-brn3
    Resistor-1/4W475 1/4W 1%y-v-grn-bl-br y-v-grn-bl-br2
    Resistor-1/4W1 k 1/4W 1%br-blk-blk-br-br br-blk-blk-br-br3
    Resistor-1/4W2.21 k 1/4W 1%r-r-br-br-br r-r-br-br-br5
    Resistor-1/4W3.32 k 1/4W 1%ora-ora-red-brn-brn ora-ora-red-brn-brn1
    Resistor-1/4W4.99 k 1/4W 1%y-w-w-br-br y-w-w-br-br5
    Resistor-1/4W10 k 1/4W 1%br-blk-blk-r-br br-blk-blk-r-br11
    Resistor-1/4W22.1 k 1/4W 1%r-r-brn-r-br r-r-brn-r-br3
    Resistor-1/6W68 1/6W 5%bl-gry-blk-gld bl-gry-blk-gld4
    Resistor-1/6W100 1/6W 5%br-blk-br-gld br-blk-br-gld2
    Resistor-1/6W2.2k 1/6W 5%red-red-red-gld red-red-red-gld4
    Resistor-1/6W4.7k 1/6W 5%yel-vio-red-gld yel-vio-red-gld3
    resistor-1/6W100k 1/6W 5%brn_blk_yel_gld brn_blk_yel_gld1
    Resistor-1/6W1 M 1/6W 5%brn-blk-grn-gld brn-blk-grn-gld1
    SET-HDW#6 screw, hex nut, starwasher1
    Transistor-TO-182N2222 NPN transistor 1
    Transistor-TO-92BS170 N-Channel Enhancement Mode FETBS170 BS1706
    Transistor-TO-922N3904 NPN Transistor2N3904 2N39042
    Transistor-TO-922N3906 PNP transistor2N3906 2N39062

    Band-Specific "Sub-BOMs"

    To see the values for the band-specific items, click on the link below corresponding to the desired band/kit

    Component Designations by Stage

    Click to see the listing of individual componet designations by stage (e.g., "R1 10 ohms in Local Oscillator Stage").

    UnAssigned Components

    Cs20.01 uF(smt) (smt)SMT 1206  Bill of Materials
    Cs10.1 uF(smt) black stripe (smt) black stripeSMT 1206 spare SMT capBill of Materials