Down converter circuits
1st VCO circuits
2nd VCO circuits
DDS circuits
RF circuits
• MAIN-A UNIT
Noise blanker amplifier
(Q68: 2SK882)
APCO5V regulator
(Q77: 2SA1832)
Buffer
(Q60: 2SC4617)
AM detecter circuits
WFM IF IC
(IC16: LA1145M)
NFM, FM, IF IC (IC24: TA31136)
RSSI meter amplifier
(IC25: NJM2904V, D80: 1SS400)
AGC amplifier
(Q58: 2SC4617)
2nd IF amplifier
(Q66: 3SK131)
2nd mixer
(IC19: TA4107F)
1st IF amplifier
(Q44: 3SK131)
1st mixer
(IC14: SPM5001)
+5V regulator
(Q23: UNR9111)
DVCO +5V regulator
(Q78: UNR9111)
DPLL 3.3V regulator
(IC2: S-812C33AMC)
D3.3V regulator (Q10: UNR9111)
IF IC (Band scope)
(IC20: TA31136)
ATT circuits
TOP VIEW
BOTTOM VIEW
SSB decoder
(IC23: TA4101F)
DDSREF 8V regulator
(D120: DAN222)
DDS REF 8V regulator
(Q90: XP4311)
HF 8V regulator
(Q25: XP4311)
HF band RF amplifier
(Q22: 2SC5226)
PLL 3.3V regulator
(IC9: S-812C33AMC)
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