Can anybody tell me if the Uniden BC860XLT has a discriminator? If it
does, how can I identify it?

all FM receivers have a discriminator!
u can't list to FM without one!
you will usually find it close to the 455kHz ceramic filter
look at then in the maplin cat.

mike

"Dark Ravyn" wrote in message
om...
Can anybody tell me if the Uniden BC860XLT has a discriminator? If it
does, how can I identify it?


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all FM receivers have a discriminator!
u can't list to FM without one!
you will usually find it close to the 455kHz ceramic filter
look at then in the maplin cat.


Almost no FM receivers have a discrimimator now. The discriminator is a
specific type of circuit. It has mostly been replaced by ICs that use other
methods of detecting FM. He is looking for a point to take the output just
after whatever type of detector is being used.

Here is a list of scanners and chips that someone posted in the past. If
your scanner is not on it , look for an IC that matches any of the ones
listed. Take your signal off the baseband audio pin.

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@

There is a growing interest in tapping the baseband audio out of
various scanners for decoding of a variety of esoteric signals,
including CTCSS, SCA, FSK, RTTY, FAX, etc. By and large, such
signals cannot be take from TAPE REC jacks, headphone jacks, and
EXT SPEAKER jacks because of the voice-band filtering that is done
between the signal source and these output jacks.

Therefore, it is necessary to tap the "baseband audio" directly
at the output of the discriminator chip for your scanner. The
below Table shows a list of scanners, the discriminator chip(s)
used in the scanner, circuit symbols of those chips, and three
pins of general interest on the chips: RF-Input, Scan Control,
and, of course, the baseband audio pin.

Even though your scanner may not be listed, if you can find its
discriminator chip, it will be listed with one or more scanners
below, the pins of which will be the same for your unlisted scanner!
Corrections and additions to this list are requested. See my email
and other addresses at the end of this file.

SCANNER DISCRIMINATOR CHIP PINS OF INTEREST

CKT RF-in SCAN AUDIO
SCANNER NFM CHIP TYPE SYMBOL Pin Pin BASEBAND
=============== =============== ======= ===== ===== =========
MPS5071 n/a 16 13 9
AR-1000 TA-7787AF IC-4 ? ? ?
AR-2002 MC-3357P IC-4 16 13 9
AR-3000 MC-3357P ? 16 13 9
AR-800 MC-3361N IC-200 16 13 9
AR-900 MC-3361N IC-201 16 13 9
AR-950 MC-3361N IC-201 16 13 9
BC-100XL MC-3359P IC-1 18 15 10
BC-100XLT TK-10421M-2 IC-401 20 16 11
BC-200XLT TK-10421M-2 IC-401 20 16 11
BC-205XLT TK-10421M-2 IC-401 20 16 11
BC-250 ? IC-3 16 13 9
BC-2500XLT TK-10930VTL IC-201 24 - 12-FM 13-AM
BC-350A NJM-3359D-A IC-3 18 15 10
BC-400XLT NJM-3359D-A IC-1 18 15 10
BC-560XLT NJM-3359D-A IC-1 18 15 10
BC-700A NJM-3359D-A IC-3 18 15 10
BC-760XLT NJM-3359D-A IC-2 18 15 10
BC-800XLT MC-3359P IC-1 18 15 10
BC-8500XLT MC-3361BP IC-9 16 13 9
BC-855XLT TK-10421M-2 IC-401 20 16 11
BC-890XLT NJM-3359D-A IC-3 18 15 10
BC-950XLT NJM-3359D-A IC-2 18 15 10
HX-1000 TK-10420 U-201 16 13 9
MR-8100 NJM-3359D-A IC-3 18 15 10
MX-5000 MC-3357P IC-4 16 13 9
MX-7000 MC-3357P IC-4 16 13 9
PRO-2002 MC-3357P IC-101 16 13 9
PRO-2003 MC-3357P IC-104 16 13 9
PRO-2004 NFM/AM TK-10420 IC-2 16 13 9
PRO-2004 WFM KB4419A IC-1 1 ? 6
PRO-2005 NFM/AM TK-10420 IC-2 16 13 9
PRO-2005 WFM KB4419A IC-1 1 ? 6
PRO-2006 NFM/AM TK-10420 IC-2 16 13 9
PRO-2006 WFM KB4419A IC-1 1 ? 6
PRO-2011 TK-10420 IC-1 16 13 9
PRO-2020 MC-3357P IC-101 16 13 9
PRO-2021 TK-10420 IC-2 16 13 9
PRO-2022 MC-3361N IC-1 16 13 9
PRO-2024 MC-3361N IC-2 16 13 9
PRO-2025 NJM-3359D-A IC-1 18 15 10
PRO-2026 NJM-3359D-A IC-7 18 15 10
PRO-2027 MC-3361N IC-2 16 13 9
PRO-2028 NJM-3359D-A IC-2 18 15 10
PRO-2030 NJM-3359D-A IC-3 18 15 10
PRO-2035 TK-10420 IC-2 16 13 9
PRO-2042 TK-10420 IC-2 16 13 9
PRO-23 MC-3361BD IC-1 16 13 9
PRO-26 NFM/AM TK-10930V IC-14 24 - 12-NFM 13-AM
PRO-26 WFM TK-10489M IC-16 20 16-17 11
PRO-31 TK-10420 IC-1 16 13 9
PRO-32 TK-10420 IC-101 16 13 9
PRO-34 TK-10420 IC-101 16 13 9
PRO-35 TK-10421M-2 IC-401 20 16 11
PRO-36 TK-10420 IC-101 16 13 9
PRO-37 TK-10420 IC-101 16 13 9
PRO-39 MC-3361N IC-201 16 13 9
PRO-41 MC-3359P IC-1 18 15 10
PRO-42 MC-3361N IC-2 16 13 9
PRO-43 TK-10427/-10420 IC-301 16 13 9
PRO-44 MC-3361N IC-201 16 13 9
PRO-46 TK-10421M-3LT IC-401 20 16 11
PRO-51 MC-3361BD IC-1 16 13 9
PRO-60 ? IC-301 16 13 9
R-1600 NJM-3359D-A IC-2 18 15 10
R-4030 TK-10421M-2 IC-401 20 16 11
SR-15 TK-10421D-2 IC-1 16 13 9
TurboScan 2 3130-6056-502 U-201 18 ? 10 or 16
================================================== ===============

Thanks. Instead of mine it lists the BC855XLT, which is basically the same
thing with fewer bells and whistles.


"Ralph Mowery" wrote in message
...
all FM receivers have a discriminator!
u can't list to FM without one!
you will usually find it close to the 455kHz ceramic filter
look at then in the maplin cat.


Almost no FM receivers have a discrimimator now. The discriminator is a
specific type of circuit. It has mostly been replaced by ICs that use
other
methods of detecting FM. He is looking for a point to take the output
just
after whatever type of detector is being used.

Here is a list of scanners and chips that someone posted in the past. If
your scanner is not on it , look for an IC that matches any of the ones
listed. Take your signal off the baseband audio pin.

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@

There is a growing interest in tapping the baseband audio out of
various scanners for decoding of a variety of esoteric signals,
including CTCSS, SCA, FSK, RTTY, FAX, etc. By and large, such
signals cannot be take from TAPE REC jacks, headphone jacks, and
EXT SPEAKER jacks because of the voice-band filtering that is done
between the signal source and these output jacks.

Therefore, it is necessary to tap the "baseband audio" directly
at the output of the discriminator chip for your scanner. The
below Table shows a list of scanners, the discriminator chip(s)
used in the scanner, circuit symbols of those chips, and three
pins of general interest on the chips: RF-Input, Scan Control,
and, of course, the baseband audio pin.

Even though your scanner may not be listed, if you can find its
discriminator chip, it will be listed with one or more scanners
below, the pins of which will be the same for your unlisted scanner!
Corrections and additions to this list are requested. See my email
and other addresses at the end of this file.

SCANNER DISCRIMINATOR CHIP PINS OF INTEREST

CKT RF-in SCAN AUDIO
SCANNER NFM CHIP TYPE SYMBOL Pin Pin BASEBAND
=============== =============== ======= ===== ===== =========
MPS5071 n/a 16 13 9
AR-1000 TA-7787AF IC-4 ? ? ?
AR-2002 MC-3357P IC-4 16 13 9
AR-3000 MC-3357P ? 16 13 9
AR-800 MC-3361N IC-200 16 13 9
AR-900 MC-3361N IC-201 16 13 9
AR-950 MC-3361N IC-201 16 13 9
BC-100XL MC-3359P IC-1 18 15 10
BC-100XLT TK-10421M-2 IC-401 20 16 11
BC-200XLT TK-10421M-2 IC-401 20 16 11
BC-205XLT TK-10421M-2 IC-401 20 16 11
BC-250 ? IC-3 16 13 9
BC-2500XLT TK-10930VTL IC-201 24 - 12-FM 13-AM
BC-350A NJM-3359D-A IC-3 18 15 10
BC-400XLT NJM-3359D-A IC-1 18 15 10
BC-560XLT NJM-3359D-A IC-1 18 15 10
BC-700A NJM-3359D-A IC-3 18 15 10
BC-760XLT NJM-3359D-A IC-2 18 15 10
BC-800XLT MC-3359P IC-1 18 15 10
BC-8500XLT MC-3361BP IC-9 16 13 9
BC-855XLT TK-10421M-2 IC-401 20 16 11
BC-890XLT NJM-3359D-A IC-3 18 15 10
BC-950XLT NJM-3359D-A IC-2 18 15 10
HX-1000 TK-10420 U-201 16 13 9
MR-8100 NJM-3359D-A IC-3 18 15 10
MX-5000 MC-3357P IC-4 16 13 9
MX-7000 MC-3357P IC-4 16 13 9
PRO-2002 MC-3357P IC-101 16 13 9
PRO-2003 MC-3357P IC-104 16 13 9
PRO-2004 NFM/AM TK-10420 IC-2 16 13 9
PRO-2004 WFM KB4419A IC-1 1 ? 6
PRO-2005 NFM/AM TK-10420 IC-2 16 13 9
PRO-2005 WFM KB4419A IC-1 1 ? 6
PRO-2006 NFM/AM TK-10420 IC-2 16 13 9
PRO-2006 WFM KB4419A IC-1 1 ? 6
PRO-2011 TK-10420 IC-1 16 13 9
PRO-2020 MC-3357P IC-101 16 13 9
PRO-2021 TK-10420 IC-2 16 13 9
PRO-2022 MC-3361N IC-1 16 13 9
PRO-2024 MC-3361N IC-2 16 13 9
PRO-2025 NJM-3359D-A IC-1 18 15 10
PRO-2026 NJM-3359D-A IC-7 18 15 10
PRO-2027 MC-3361N IC-2 16 13 9
PRO-2028 NJM-3359D-A IC-2 18 15 10
PRO-2030 NJM-3359D-A IC-3 18 15 10
PRO-2035 TK-10420 IC-2 16 13 9
PRO-2042 TK-10420 IC-2 16 13 9
PRO-23 MC-3361BD IC-1 16 13 9
PRO-26 NFM/AM TK-10930V IC-14 24 - 12-NFM 13-AM
PRO-26 WFM TK-10489M IC-16 20 16-17 11
PRO-31 TK-10420 IC-1 16 13 9
PRO-32 TK-10420 IC-101 16 13 9
PRO-34 TK-10420 IC-101 16 13 9
PRO-35 TK-10421M-2 IC-401 20 16 11
PRO-36 TK-10420 IC-101 16 13 9
PRO-37 TK-10420 IC-101 16 13 9
PRO-39 MC-3361N IC-201 16 13 9
PRO-41 MC-3359P IC-1 18 15 10
PRO-42 MC-3361N IC-2 16 13 9
PRO-43 TK-10427/-10420 IC-301 16 13 9
PRO-44 MC-3361N IC-201 16 13 9
PRO-46 TK-10421M-3LT IC-401 20 16 11
PRO-51 MC-3361BD IC-1 16 13 9
PRO-60 ? IC-301 16 13 9
R-1600 NJM-3359D-A IC-2 18 15 10
R-4030 TK-10421M-2 IC-401 20 16 11
SR-15 TK-10421D-2 IC-1 16 13 9
TurboScan 2 3130-6056-502 U-201 18 ? 10 or 16
================================================== ===============