Scandata faq q2
From The RadioReference Wiki
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Q2: How can I find the Discriminator Output in my scanner?
Table 1 shows a list of scanners, the discriminator chip(s)
used in the scanner, circuit symbols of those chips, and the
baseband audio (discriminator output) pin.
If your scanner isn't listed in Table 1, then refer to Table
2 to find its discriminator chip. The chips listed in Table
2 are all known Discriminators used in scanners and wide
coverage receivers.
Between Tables 1 and 2, you should be able to find the NFM
discriminator and its output pin for any reasonably modern
scanner.
Corrections and additions to these lists are requested. See
my email and other addresses at the end of this file.
TABLE 1: SCANNER NFM DISCRIMINATOR CHIPS & PINS
Updated 03/27/99 09/23/00
DISCR/DET CKT BASEBAND
SCANNER CHIP TYPE SYMBOL AUDIO PIN
============== ============== ======= =========
unknown MPS5071 n/a 9
AR-1000 TA-7787AF IC-4 9
AR-2002 MC-3357P IC-4 9
AR-2500 TA-7761P IC-13 9
AR-3000 MC-3357P ? 9
AR-800 MC-3361N IC-200 9
AR-900 MC-3361N IC-201 9
AR-950 MC-3361N IC-201 9
AR-8000 NFM TK10489M or-85M U1 11
AR-8000 WFM/AM TA7792F U3 8
BC-20/20 NB5310-1 ? 9 *
BC-60XLT-1 MC3361BD IC-1 9
BC-70XLT LSC1359P IC-1 9 *
BC-80XLT MC3361B0 IC-101 9
BC-100XL MC-3359P IC-1 10
BC-100XLT TK-10421M-2 IC-401 11
BC-120XLT MC3361BD IC-1 9
BC-140XLT MC-3359P IC-1 10 *
BC-200XLT TK-10421M-2 IC-401 11
BC-205XLT TK-10421M-2 IC-401 11
BC-210 SC8780P/MC3357P IC-2 9
BC-220 SC8780P/MC3357P IC-2 9
BC-220XLT MC3361BD IC-1 9 *
BC-235XLT MC3361CDR2 IC-2 9
BC-244CLT MC3361CDR2 IC-101 9
BC-245XLT MC3361CDR2 IC-2 9
BC-248CLT MC3361CDR2 IC-101 9
BC-250 SC8780P/MC3357P IC-3 9
BC-350A NJM-3359D-A IC-3 10
BC-400XLT NJM-3359D-A IC-1 10
BC-560XLT NJM-3359D-A IC-1 10
BC-700A NJM-3359D-A IC-3 10
BC-760XLT NJM-3359D-A IC-2 10
BC-780XLT MC3371D IC-6 9
BC-800XLT MC-3359P IC-1 10
BC-855XLT TK-10421M-2 IC-401 11
BC-890XLT NJM-3359D-A IC-3 10
BC-895XLT MC3371D IC-3 9 see note 1 below
BC-950XLT NJM-3359D-A IC-2 10
BC-2500XLT TK-10930VTL IC-201 12-FM 13-AM
BC-3000 NFM/AM TK-10930V IC-202 12-NFM 13-AM
BC-3000 WFM TK-10489M IC-203 11
BC-8500XLT MC-3361BP IC-9 9
BC-9000XLT MC3361B0 IC-8 9
BC-9000XLT WFM TK10489-MTL IC-9 11
BC-9000XLT AM LA1600A IC7 8 or 9 (?)
BCT-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 R100 NFM MC3357P 9 (Near Bottom of radio)
Icom R7100 Said to be "top of R230 on main PCB" *
MR-8100 NJM-3359D-A IC-3 10
MX-5000 MC-3357P IC-4 9
MX-7000 MC-3357P IC-4 9
Maxtrac (Mot) 79G05 QLMD9035 6 (Behind the channel-up button)
PRO-2002 MC-3357P IC-101 9
PRO-2003 MC-3357P IC-104 9
PRO-2004 NFM/AM TK-10420 IC-2 9 (TP4)
PRO-2004 WFM KB4419A IC-1 6 (TP3)
PRO-2005 NFM/AM TK-10420 IC-2 9 (TP2)
PRO-2005 WFM KA2243N/HA12413 IC-1 10 (TP1)
PRO-2006 NFM/AM TK-10420 IC-2 9 (TP2)
PRO-2006 WFM KA2243N/HA12413 IC-1 10 (TP1)
PRO-2011 TK-10420 IC-1 9
PRO-2020 MC-3357P IC-101 9
PRO-2021 TK-10420 IC-2 9
PRO-2022 MC-3361N IC-1 9
PRO-2023 NJM-3359D-A ? 10
PRO-2024 MC-3361N IC-2 9
PRO-2025 NJM-3359D-A IC-1 10
PRO-2026 NJM-3359D-A IC-7 10
PRO-2027 MC-3361N IC-2 9
PRO-2028 NJM-3359D-A IC-2 10
PRO-2030 NJM-3359D-A IC-3 10
PRO-2032 MC-3361 IC-2 9 (TP5)
PRO-2035 NFM/AM TK-10420 IC-2 9 (TP2)
PRO-2035 WFM KA2243N/HA12413 IC-1 10 (TP1)
PRO-2038 NJM-3359DA IC-3 10
PRO-2039 NFM KA3361 IC-2 ( use TP6)
PRO-2040 MC3361BP IC-2 9
PRO-2041 MC3361N IC-301 9 *
PRO-2042 NFM/AM TK-10420 IC-2 9 (TP2)
PRO-2042 WFM KA2243N/HA12413 IC-1 10 (TP1)
PRO-2048 MC3361CDR2 ? 9
PRO-2050 MC3361CDR2 IC-2 9 *
PRO-2052 MC3361CDR2 IC-2 9
PRO-2067 KA3361BD/-CD/-ED IC-301 9
PRO-23 MC-3361BD IC-1 9
PRO-24 MC3361BP IC-2 9 *
PRO-26 NFM/AM TK-10930V IC-14 12-NFM 13-AM
PRO-26 WFM TK-10489M IC-16 11
PRO-31 TK-10420 IC-1 9
PRO-32 TK-10420 IC-101 9
PRO-34 TK-10420 IC-101 9
PRO-35 TK-10421M-2 IC-401 11
PRO-36 TK-10420 IC-101 9
PRO-37 TK-10420 IC-101 9 (TP103)
PRO-38 MC-3359P IC-1 10
PRO-39 MC-3361N IC-201 9
PRO-41 MC-3359P IC-1 10
PRO-42 MC-3361N IC-2 9
PRO-43 TK-10427/-10420 IC-301 9
PRO-44 MC-3361N IC-201 9
PRO-46 TK-10421M-3LT IC-401 11
PRO-49 MC3361BP IC-2 9
PRO-51 MC3361BD IC-1 9
PRO-60 TA31136FN IC-301 9
PRO-62 KA3361 IC-301 9 *
PRO-64 MC3361N IC-301 9
PRO-66 MC3361N IC-2 9 (TP3) *
PRO-71 MC3361BD IC-1 9
PRO-74 MC3361CDR2 IC-2 9
PRO-79 KA3361CD/-ED IC-3 9
PRO-89 KA3361CD/-ED IC-4 9
PRO-90 MC3361CDR2 IC-2 9
PRO-91 MC3361CDR2 IC-2 9
PRO-92 KA3361BD/-CD IC-301 9 see note 2 below
PRO-94 MC3361CDR2 IC-2 9
R-1600 NJM-3359D-A IC-2 10
R-4030 TK-10421M-2 IC-401 11
SR-15 TK-10421D-2 IC-1 9
StandardCCR708A 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 *
=====================================================
* Not personally verified by me
TABLE 2
DISCRIM OUTPUT
CHIP PIN
========= ======
KA3361 9
MC3357P 9
MC3359P 10
MC3361 9
MC3371 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
Once you locate the discriminator in your scanner, you have
to make its output conveniently available on the exterior
chassis, much like a headphone or tape recorder jack.
Figure 1 below shows how to determine the pin numbering
system for most integrated circuits. Looking at the marking
side of the chip, there is either a notch or nook at one
end, and/or an embedded "dot" off to one side at one end.
The notch, nook, or dot signifies the end that starts with
Pin #1 and ends with whatever the highest numbered pin
happens to be. Most IC's have 8, 14, 16, or 18 pins.
FIGURE 1
TYPICAL NFM IC CHIP PINOUT
NFM DISCR
16 15 14 13 12 11 10 9 10uF/16v Baseband
| | | | | | | |----+[|------> Audio Out
+------------------------+
| | /-------> Ground
| TOP VIEW | |
Notch \ LABEL | |
/ Dot SIDE | ^
| O | Scanner
| | Ground
+------------------------+
| | | | | | | |
1 2 3 4 5 6 7 8
NOTE: Figure 1 shows the baseband audio tap on Pin 9,
though the pin number will vary from one chip
to the next.
Note 1: The original article for tapping the 895 recommended tapping pin 9 off an IC. This was later found to be incorrect. The correct procedure can be found at the BC895XLT Discriminator Tap article
Note 2: An easier point to put a tap on the PRO-92 can be found here
Links to additional discriminator taps can be found in the Discriminator output article.
Many of the scanners listed above incorporate the Motorola MC3361 receiver chip.
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