SCANNER DISCR/DET CHIP TYPE CKT SYMBOL BASEBAND AUDIO PIN
unknown MPS5071 n/a 9
AOR AR-800 MC-3361N IC-200 9
AOR AR-900 MC-3361N IC-201 9
AOR AR-950 MC-3361N IC-201 9
AOR AR-1000 TA-7787AF IC-4 9
AOR AR-2002 MC-3357P IC-4 9
AOR AR-2500 TA-7761P IC-13 9
AOR AR-3000 MC-3357P ? 9
AOR AR-8000 NFM TK10489M or-85M U1 11
AOR AR-8000 WFM/AM TA7792F U3 8
Uniden - Bearcat UBC-20/20 NB5310-1 ? 9
Uniden - Bearcat UBC-70XLT LSC1359P IC-1 9
Uniden - Bearcat UBC-80XLT MC3361B0 IC-101 9
Uniden - Bearcat UBC-100XL MC-3359P IC-1 10
Uniden - Bearcat UBC-100XLT TK-10421M-2 IC-401 11
Uniden - Bearcat UBC-140XLT MC-3359P IC-1 10
Uniden - Bearcat UBC-200XLT TK-10421M-2 IC-401 11
Uniden - Bearcat UBC-205XLT TK-10421M-2 IC-401 11
Uniden - Bearcat UBC-220XLT MC3361BD IC-1 9
Uniden - Bearcat UBC-235XLT MC3361CDR2 IC-2 9
Uniden - Bearcat UBC-250 SC8780P/MC3357P IC-3 9
Uniden - Bearcat UBC-2500XLT TK-10930VTL IC-201 12-FM 13-AM
Uniden - Bearcat UBC-3000 NFM/AM TK-10930V IC-202 12-NFM 13-AM
Uniden - Bearcat UBC-3000 WFM TK-10489M IC-203 11
Uniden - Bearcat UBC-350A NJM-3359D-A IC-3 10
Uniden - Bearcat UBC-400XLT NJM-3359D-A IC-1 10
Uniden - Bearcat UBC-560XLT NJM-3359D-A IC-1 10
Uniden - Bearcat UBC-700A NJM-3359D-A IC-3 10
Uniden - Bearcat UBC-760XLT NJM-3359D-A IC-2 10
Uniden - Bearcat UBC-800XLT MC-3359P IC-1 10
Uniden - Bearcat UBC-8500XLT MC-3361BP IC-9 9
Uniden - Bearcat UBC-855XLT TK-10421M-2 IC-401 11
Uniden - Bearcat UBC-890XLT NJM-3359D-A IC-3 10
Uniden - Bearcat UBC-895XLT MC13371 IC-3 9
Uniden - Bearcat UBC-950XLT NJM-3359D-A IC-2 10
Uniden - Bearcat UBC-9000XLT MC3361B0 IC-8 9
Uniden - Bearcat UBC-9000XLT WFM TK10489-MTL IC-9 11
Uniden - Bearcat UBC-9000XLT AM LA1600A IC7 8 or 9 (?)
Uniden - Bearcat UBCT-7 MC3361BD IC-2 9
HX-1000 TK-10420 U-201 9
ICF-SC1PC TA3116FN IC-401 9
ICF-SC1 TA3116FN IC-401 9
Icom IC-2SRA MC-3372 ? 9
Icom R-1 NFM TK-10487 DET-A IC-1 11
Icom R-1 WFM TA-7787AF DET-B IC-1 9
Icom R-7100 said to be "top of R230 on main PCB"
ICOM RC-2 Connector J1 Pin 16, use a 0.1uF Cap
MR-8100 NJM-3359D-A IC-3 10
MX-5000 MC-3357P IC-4 9
MX-7000 MC-3357P IC-4 9
Realistic Pro-2002 MC-3357P IC-101 9
Realistic Pro-2003 MC-3357P IC-104 9
Realistic Pro-2004 NFM/AM TK-10420 IC-2 9 (TP4)
Realistic Pro-2004 WFM KB4419A IC-1 6 (TP3)
Realistic Pro-2005 NFM/AM TK-10420 IC-2 9 (TP2)
Realistic Pro-2005 WFM KA2243N/HA12413 IC-1 10 (TP1)
Realistic Pro-2006 NFM/AM TK-10420 IC-2 9 (TP2)
Realistic Pro-2006 WFM KA2243N/HA12413 IC-1 10 (TP1)
Realistic Pro-2011 TK-10420 IC-1 9
Realistic Pro-2020 MC-3357P IC-101 9
Realistic Pro-2021 TK-10420 IC-2 9
Realistic Pro-2022 MC-3361N IC-1 9
Realistic Pro-2023 NJM-3359D-A ? 10
Realistic Pro-2024 MC-3361N IC-2 9
Realistic Pro-2025 NJM-3359D-A IC-1 10
Realistic Pro-2026 NJM-3359D-A IC-7 10
Realistic Pro-2027 MC-3361N IC-2 9
Realistic Pro-2028 NJM-3359D-A IC-2 10
Realistic Pro-2030 NJM-3359D-A IC-3 10
Realistic Pro-2032 MC-3361 IC-2 9 (TP5)
Realistic Pro-2035 NFM/AM TK-10420 IC-2 9 (TP2)
Realistic Pro-2035 WFM KA2243N/HA12413 IC-1 10 (TP1)
Realistic Pro-2038 NJM-3359DA IC-3 10
Realistic Pro-2040 MC3361BP IC-2 9
Realistic Pro-2041 MC3361N IC-301 9
Realistic Pro-2042 NFM/AM TK-10420 IC-2 9 (TP2)
Realistic Pro-2042 WFM KA2243N/HA12413 IC-1 10 (TP1)
Realistic Pro-2050 MC3361CDR2 IC-2 9
Realistic Pro-23 MC-3361BD IC-1 9
Realistic Pro-24 MC3361BP IC-2 9
Realistic Pro-26 NFM/AM TK-10930V IC-14 12-NFM 13-AM
Realistic Pro-26 WFM TK-10489M IC-16 11
Realistic Pro-31 TK-10420 IC-1 9
Realistic Pro-32 TK-10420 IC-101 9
Realistic Pro-34 TK-10420 IC-101 9
Realistic Pro-35 TK-10421M-2 IC-401 11
Realistic Pro-36 TK-10420 IC-101 9
Realistic Pro-37 TK-10420 IC-101 9 (TP103)
Realistic Pro-38 MC-3359P IC-1 10
Realistic Pro-39 MC-3361N IC-201 9
Realistic Pro-41 MC-3359P IC-1 10
Realistic Pro-42 MC-3361N IC-2 9
Realistic Pro-43 TK-10427/-10420 IC-301 9
Realistic Pro-44 MC-3361N IC-201 9
Realistic Pro-46 TK-10421M-3LT IC-401 11
Realistic Pro-49 MC3361BP IC-2 9
Realistic Pro-51 MC-3361BD IC-1 9
Realistic Pro-60 ? IC-301 9
Realistic Pro-62 KA3361 IC-301 9
Realistic Pro-64 MC3361N IC-301 9
Realistic Pro-66 MC3361N IC-2 9 (TP3)
Realistic Pro-90 MC3361CDR2 IC-2 9
R-1600 NJM-3359D-A IC-2 10
R-4030 TK-10421M-2 IC-401 11
SC1PC TA3116FN IC-401 9
SC1 TA3116FN IC-401 9
SR-15 TK-10421D-2 IC-1 9
Standard CCR708A TK-10420D Q602 9
TurboScan 2 3130-6056-502 U-201 10 or 16
WiNRADiO NFM MC-3372D U2 9 TP20
WiNRADiO AM/WFM TA-7640AP U5 9 TP29
WiNRADiO SSB LM324M U6 1
Yaesu FRG-9600 MC-3357P ? 9
DISCRIM CHIP OUTPUT PIN
KA3361 9
MC13371 9
MC3357P 9
MC3359P 10
MC3361 9
MC3372D 9
MPS5071 9
NJM3359DA 10
TA3116FN 9
TA7640AP 9
TA7761P 9
TA7787AF 9
TA7792F 8
TK10420 9
TK10421D 9
TK10421M 11
TK10427 9
TK10485M 11
TK10487 11
TK10489M 11
TK10930V 12
CXA1111N 21 AM/WFM Only
HA12413 9 WFM Only
KA2243N 9 WFM Only
KB4419A 6 WFM Only
TYPICAL IC CHIP PINOUT
14 13 12 11 10 9 8
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BC895 Discriminator Tap Information
I've seen numerous complaints from those who have had trouble getting applications working that need unfiltered base-band audio from the BC895 discriminator.
Most people are tapping the discriminator at pin 9 of IC3 and this seems to be the problem. IC3 P9 is NOT the right place to get at the discriminator signal. The signal at that point is actually the 3rd IF output with the base-band audio impressed on it (i.e. AM). What you actually have is the desired signal, but translated to the 3rd IF frequency (~450 KHz).
This is not going to work well with most applications that require the discriminator output.
The actual base-band discriminator tap point is found on the bottom of the circuit board and is MUCH easier to get at and solder to than IC3 P9 anyway.
The signal is ~1.5V P-P riding on a 2V DC bias.
To get at it, remove the bottom cover of the radio. Orient the radio so that the rectangular silver shielded box is at the top of the radio and the rotary VFO knob is at the lower right hand corner.
The tap point is a solder pad at the lower terminus of a vertical trace about an inch long. The pad is located at a point 3.6" from the top edge of the circuit board and 2.6" to the left of the right edge of the circuit board.
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