Elecraft K2 Owner's Manual - Manual (Page 132)

Page 9 RF
Appendix A K2 RF Board Parts List (p/n E850001A and E850001B)
PICTURE Designators Value Description Part Number QTY
U3, U9 LT1252 8 pin DIP, VFO Buffer; TX Buffer E600020 2
U5 LTC1451
8 pin DIP, 12-Bit DAC for Reference
Freq. Of PLL
E600030
1
U6 LMC662
8 pin DIP, (rail-to-rail out); PLL Loop
filter
E600026
1
U10, U11 NE/SA602 8 pin DIP, mixer; alt: NE/SA612 E600006 2
U12 SMT1A
IF Amp/AGC SMC on daughterboard
with 2 ea. 4-pin headers.
E1200013
1
U8 78L05 5-volt reg. (100mA) E600029
1
U4
MC145170P2 (or
P1)
16 pin DIP, PLL E600016
1
W1, W2, W3, W5, W6 1" bare wire Use component leads 0
X1 (X2 not used) 12096 kHz
PLL reference oscillator crystal; HC-
49
E850007
1
X3, X4 4915.2 kHz
BFO crystals; matched set; HC-49
Typical labeling: ECS D 4.91 -S
E850008
2
X5, X6, X7, X8, X9, X10, X11 4913.6 kHz
Filter crystals; matched set, HC-49
Typical labeling: ECS V 4.9136-S
E850006
7
Z5
4.000MHz
Resonator Ceramic resonator w/caps; 0.2%
tolerance
E660001
1