Mimima Parts List

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- Minima Transceiver Parts List -


BFO, Mixer/Detector and Side Band Relay Switch

Type Count Component
Q9,10,11 3 ea. 2N3904
Y 1 ea. 20 MHz crystal
RY 1 ea. 12 VDC, SPDT, (Omron G5V-1 13V for YO4HHP pcb)
RFC 1 ea. Choke, 10 turns on an FT37-43
T3 1 ea. 8 trifilar turns on an FT37-43, w/32 SWG (30 AWG)
L 1 ea. 3 uh coil
D2 1 ea. 1N4007
D4,5 2 ea. 1N4148
C 2 ea. 22pf trimmer cap., (Murata TZ03 for YO4HHP pcb)
C 5 ea. 0.1uf
C 1 ea. 100pf
R 1 ea. 10
R 1 ea. 100
R 2 ea. 1k
R 1 ea. 4.7k
R 2 ea. 10 k


Audio Amplifier

Type Count Component
Q16,18 2 ea. 2N3904
Q17 1 ea. 2N3906
D8,9 2 ea. 1N4148
C 1 ea. +10uf
C 3 ea. +50uf
C 1 ea. +500uf
R 3 ea. 22
R 1 ea. 100
R 1 ea. 470
R 1 ea. 2.2k
R 1 ea. 10k
R 1 ea. 47k
Pot. 1 ea. 10k, log taper, vol. cntl. (perhaps with on/off switch)


Microphone Amplifier

Type Count Component
Q19 1 ea. 2N3904
C 1 ea. .01uf
C 2 ea. +1uf
C 2 ea. +50uf
R 1 ea. 10
R 2 ea. 220
R 1 ea. 1k
R 1 ea. 2.2k
R 1 ea. 4.7k
R 1 ea. 10k


CW Audio Oscillator and T/R Relay Switch

Type Count Component
Q20,23,24 3 ea. 2N3904
D3 1 ea. 1N4007
RY 1 ea. 12 VDC, DPDT, (Omron G5V-2 12V for YO4HHP pcb)
C 3 ea. .01uf
C 2 ea. .1uf
R 2 ea. 10
R 1 ea. 220
R 2 ea. 1k
R 1 ea. 2.2k
R 2 ea. 4.7k
R 2 ea. 6.8k
R 1 ea. 10k
R 1 ea. 47k


KISS Mixer

Type Count Component
Q1,2 2 ea. J310 JFET
T1,2 2 ea. 8 trifilar turns on an FT37-43, w/32 SWG (30 AWG)
VR 1 ea. 78L05
C 1 ea. .1uf
C 1 ea. +50uf
R 1 ea. 4.7k


Lowpass Filters

Type Count Component
RY 2 ea. 12 VDC, SPDT, (Omron G5V0-1 12V for YO4HHP pcb)
Q23 (Q12?) 1 ea. 2N3904
D1 1 ea. 1N4007
C 3 ea. 22pf trimmer cap., (Murata TZ03 for YO4HHP pcb)
C 2 ea. 100pf
C 5 ea. 220pf
C 4 ea. 470pf
C 4 ea. .1uf, See "Whats New - Low Pass Filters"
L 2 ea. .33uh, See "Whats New - Low Pass Filters"
L 2 ea. .39uh, See "Whats New - Low Pass Filters"
L 2 ea. .66uh, See "Whats New - Low Pass Filters"
L 2 ea. .78uh, See "Whats New - Low Pass Filters"
L 3 ea. 3uh, See "Whats New - Low Pass Filters"


IF Filter

Type Count Component
Y 8 ea. 20 MHz crystals matched
C 5 ea. 100pf, (SMD size 1206 for the YO4HHP pcb)



TX, RX Bidirectional IF Amplifiers

Type Count Component
Q3,4,5,6,7,8 6 ea. 2N3904
C 10 ea. .1uf
R 3 ea. 10
R 1 ea. 50
R 4 ea. 220
R 1 ea. 470
R 3 ea. 1k
R 3 ea. 2.2k
R 1 ea. 4.7k
R 2 ea. 10k



Arduino Controller and SI570 VFO

Type Count Component
U 1 ea. Processor, ATMEGA328P
U 1 ea. SI570, programmable XO/VCXO, CMOS version
VR 1 ea. LM1117, 3.3v regulator (TO-252 package for the YO4HHP pcb)
VR 1 ea. LM7805, 5.0v regulator (TO-220 package for the YO4HHP pcb)
Y 1 ea. 16 mHz crystal
LCD 1 ea. LCD display 16 chars. X 2 lines
SW 3 ea. Push button switch, NO
C 2 ea. 22pf, (SMD size 1206 for the YO4HHP pcb)
C 4 ea. .1uf
C 1 ea. +50uf, 16V
C 1 ea. +10uf, 50V
R 1 ea. 1k
R 2 ea. 4.7k
R 1 ea. 10k
R 1 ea. 10k trim pot
R 1 ea. 100k panel mount linear pot. (tune control)
R 1 ea. 33, 2W, added on YO4HHP digital pcb



Arduino Serial Programmer Board

Type Count Component
Q21 1 ea. 2N3904
Q22 1 ea. 2N3906
D6,7 2 ea. 1N4148
C 1 ea. +50uf
R 1 ea. 4.7k
R 5 ea. 10k


Coil windings

Value Qty Core N-Turns (Mark) N-Turns (Thomas)
.33 uH 2 T37-6 10 9
.39 uH 2 T37-6 11 10
.66 uH 2 T50-2 12 10
.78 uH 3 T50-2 13 11
3 uH 3 T33 25 24

NOTES: Electrolytic capacitors marked with a +, I suggest 25 volts.

Resistors are ¼ watt. The YO4HHP pcb can use 1/8 or ¼ watt resistors.

See Farhan, VU2ESE, Adrian, YO4HHP and Mark, G0MGX contributions to the Minima project for more information.

Please feel free to correct, edit or add to this list.


Frank - W4NHJ