QRP Labs QCX-mini, Assembly Instructions Manual

Page: 8 / 133

Qty Value Description Component numbers
2 270pF Label “271” C25, 26
Semiconductors
Qty Description Component numbers
5 SMD D1, 2, 4, 5, 6
1 1N5819 diode D33 (was previously D3)
1 SMD: Si5351A, 10-pin MSOP IC1
1 ATmega328, microcontroller IC2
1 SMD: 74ACT00N IC3
1 SMD: FST3253 IC4
1 SMD: LM4562 dual op-amp IC5
5 SMD: OPA2277 dual op-amp IC6-10
1 SMD: AMS1117-5.0, 5V IC11
4 SMD: BSS123 MOSFET Q4, 5, 7, 100 (Q100 on display board)
3 BS170: TO92 MOSFET Q1-3
1 MPS751 TO92 transistor Q6
Inductors
Qty Description Component numbers
1 T37-2 toroid (rouge), windings
depend on band L4
1 T50-2 toroid (rouge), windings
depend on band T1
2 SMD: 47uH inductor L5, 6
Band-specific inductors
80m
Qty Value Description Component numbers
2 2.4uH 25 spires on T37-2 noyau
(rouge)
L1, L3
1 3.0uH 27 spires on T37-2 noyau
(rouge)
L2
1 2.3uH 24 spires on T37-2 noyau
(rouge)
L4
1 5+5+5+68 spires, T50-2 noyau
(rouge) T1
60m
Qty Value Description Component numbers
QCX-mini assembly Rev 1.05_Fr
8