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Mic AMP TA2011S

Mark-94 Main part block diagram. 2 ND OSC TX. Mic. 6MHz Filter. Mic AMP TA2011S. TX IF OUT. TX IF AMP 2SK241. Balanced Modulator NJM2594. RX IF IN. Side Tone. CW Side Tone 74HC02. SP. AF Power LM386. AF AMP 2SC1815. Balanced Modulator NJM2594. RF IF AMP 3SK114. RF IF AMP

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Mic AMP TA2011S

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  1. Mark-94 Main part block diagram 2NDOSC TX Mic 6MHz Filter Mic AMP TA2011S TX IF OUT TX IF AMP 2SK241 Balanced Modulator NJM2594 RX IF IN Side Tone CW Side Tone 74HC02 SP AF Power LM386 AF AMP 2SC1815 Balanced Modulator NJM2594 RF IF AMP 3SK114 RF IF AMP 3SK114 RF IF AMP 3SK114 AM Out AGC AMP 2SC1815 AGC DET 1N60 X2 AGC AMP LM324 AGC

  2. Mark-94 RF block diagram From RX ANT SSB/CW IF AMP 2SK241 MIXER 2SK241 X2 RF AMP MGF4910C RF AMP 3SK183 To Main RX IF In AM AM Mode 2nd MIXER/OSC IF AMP AM DET To Main AM Out 455KHz LA1600 5545KHz From VFO 44.000-44.700MHz TX IF IN MIXER 2SK241 X2 Buffer 3SK114 Driver 2SC2078 Pre-Driver 2SC2053 Final 2SC1945 TX ANT 2nd OSC Carrier Level control 2SC1818/2SA1015 From MPU

  3. Mark-94 VFO part LPF LPF LPF VCO 2SC1907E Buffer 2SC1907E Active LPF 2SK30/2SC1815 PLL TC9256AP From MPU 1SV101 X2 BPF VFO Out DDS AD9834 Buffer 2SK241 Mark-94 2nd OSC part Buffer 2SK241 DDS AD9834 From MPU RX 2nd OSC Buffer 2SK241 TX 2nd OSC Keying 2SC1815

  4. Mark-94 MPU part LCD display Crystal Module 16MHz KeyBoard 50.200 SDO SDI DISPCPU 16F877A CONTCPU 16F877A SDI SDO SCK SCK Encoder Pulse VFO PLL/DDS CW Key (Dot&Line) PTT Key Speed SideTone /Mute/BZ 2ND OSC Mode Control

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