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Facility ID Call Sign Find Stations in or by community name or ZIP code CDBS ARN/LMS File #
Search by Party Name
   
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KZSF
SAN JOSE CA
AM BROADCAST
1370 kHz
CARLOS A. DUHARTE
4633 Old Ironsides Dr.
# 160
Santa Clara CA 95054
4085467201
Facility ID: 68841
Licensed
Historic Grid View
View Public File
Correspondence
FRN: 0009634924
 
This record has been enhanced by the REC Radio History Project. Pre-1980 data has been manually entered by REC based on information from FCC History Cards. Click here to learn more.
MOD BMML-20170322ABL Superceded 03/19/2018
MOD BMML-20170322ABL Granted 04/12/2018
MLA BMML-20121005AGW Granted 11/26/2013
REC Application ID: 1565701 (LMS)
Legacy CDBS Application ID: 1565701
Record Type: Full Service AM
Application Purpose: Modify License-Amendment
Application Purpose: Minor
FRN: 0009634924
Community of license: SAN JOSE, CA, US
NAD83 Coordinates: 37 21' 27.8" N / 121 52' 20.8" W
Frequency: 1370 kHz
FCC Station Class: B
Public Notice Comments: Method of Moments Engineering Amendment filed 07/16/2013
Daytime | View Towers
Primary Tower Coordinates: 37 21' 27.8" N / 121 52' 20.8" W
Power: 5 kW
Directional Antenna: Y
RMS Standard: 747.97 mV/m at 1km
RMS Standard: 712 mV/m at 1km
Twr Field
Ratio		 Elec.
Ht.		 Phas-
ing		 Spac-
ing		 Orien-
tation		 Tower
Ref		 Top
Load		 Sw
A		 Sw
B		 Sw
C		 Sw
D		 Tower
Height
A197.8000NN000059.5m
B0.40797.871.4123.361NN000059.5m
C0.37197.8-92.682.2341NN000059.5m
D0.87597.8-11991.3251NN000059.5m
Show field strength tabulations... Display pattern of directional antenna.
Show field strength tabulations... Display directional pattern in tabular form.
 
Nighttime | View Towers
Primary Tower Coordinates: 37 21' 27.8" N / 121 52' 20.8" W
Power: 5 kW
Directional Antenna: Y
RMS Standard: 747.97 mV/m at 1km
RMS Standard: 712 mV/m at 1km
Twr Field
Ratio		 Elec.
Ht.		 Phas-
ing		 Spac-
ing		 Orien-
tation		 Tower
Ref		 Top
Load		 Sw
A		 Sw
B		 Sw
C		 Sw
D		 Tower
Height
A197.8000NN000059.5m
B0.40797.871.4123.361NN000059.5m
C0.37197.8-92.682.2341NN000059.5m
D0.87597.8-11991.3251NN000059.5m
Show field strength tabulations... Display pattern of directional antenna.
Show field strength tabulations... Display directional pattern in tabular form.
 
ML BMML-20121005AGW Superceded 08/01/2013
L2C BL-19950203AA Granted 01/22/1996
BL-10625 H Granted 08/26/1964
BMP-11231 H Granted 06/10/1964
BMP-11060 H Granted 12/06/1963
BP-14842 H Granted 03/20/1963
BP-14842 H Superceded 09/10/1962
BL-6649 H Granted 09/19/1957
BMP-7615 H Granted 04/17/1957
BMP-7499 H Granted 01/08/1957
BMP-7443 H Granted 11/27/1956
BP-9255 H Granted 04/25/1956
BZ-2346 H Granted 08/21/1947
BL-2526 H Granted 08/21/1947
BMP-2472 H Granted 02/19/1947
B5-P-4061 H Granted 12/06/1946
B5-P-4061 H Superceded 12/26/1945
CALL SIGN HISTORY
KEEN - 08/21/1941 (RHP)
KEEN - 00/00/0000 (CDBS)
KKSJ - 10/11/1993 (CDBS)
KZSF - 01/20/1998 (CDBS)
Where this call sign has been:
03/20/1995 on 92.7 in ALAMEDA CA - now KEXC (CDBS)
01/20/1998 on 92.7 in ALAMEDA CA - now KEXC (CDBS)
REC Radio History Project
This facility record includes pre-1980 information from the FCC/FRC manual history cards that pre-dates both the CDBS system and its predecessor BAPS. The history cards contain information about stations from the early days of radio. Not all records are included. Records such as license renewals and auxilliary facilities are excluded. Also, the information on the history cards was not very detailed and only contain the very basic information. We have included the comments from the card entries to help guide you along the history. REC feels that the history of radio is just as important as its future. REC will be slowly adding this data to the system giving priority to major markets and heritage stations.
For more information this project, click here.
Progressive Concepts - 5% off BW transmitters with coupon code REC
APPLICATION HISTORY
  B5-P-4061 Construction Permit Granted
12/06/1946
  BMP-2472 Minor Modify CP Granted
02/19/1947
  BMP-2902 Chg Main Studio Location Granted
07/16/1947
  BMP-2902 Main Studio Change Granted
07/16/1947
  BL-2526 License to Cover Granted
08/21/1947
  BZ-2346 Direct Measurement Granted
08/21/1947
From: UNITED BROADCASTING COMPANY, A CO-PARTNERSHIP COMPOSED OF GEORGE MARDIKIAN, GEORGE SNELL, BARNARD FLOYD FARR, S.A. MELNICOE AND ALFRED ARAM
To: UNITED BROADCASTING COMPANY
  BAL-772 Assignment Granted
04/13/1949
  BML-1447 Chg Main Studio Location Granted
09/19/1950
  BML-1447 Main Studio Change Granted
09/19/1950
  BP-9255 Modification Granted
04/25/1956
  BMP-7443 CP Extension Granted
11/27/1956
  BMP-7499 Minor Modify CP Granted
01/08/1957
  BMP-7615 CP Extension Granted
04/17/1957
  BL-6649 License to Cover Granted
09/19/1957
  BP-14842 Modification Granted
03/20/1963
  BMP-11060 CP Extension Granted
12/06/1963
  BMP-11231 CP Extension Granted
06/10/1964
  BL-10625 License to Cover Granted
08/26/1964
  BR-1602 Natl Defense Emerg Auth Granted
12/18/1967
  BR-1602 NED) Granted
05/11/1970
  BRC-3415 Chg Remote Control Point Granted
05/11/1970
  EBSA- Emerg Broadcast System Granted
05/25/1972
  LETTER- Main Studio Change Granted
07/26/1979
  LETTER- Chg Main Studio Location Granted
07/26/1979
Transaction log data BR-19800801UO Renewal Granted
11/24/1980
Public Notice Details BTC-19810915FA Transfer of Control Granted
11/18/1981
Public Notice Details BTC-19830711FU Transfer of Control Granted
07/21/1983
Public Notice Details BAL-19831004FN Assign License/CP Granted
10/19/1983
Transaction log data BR-19830801WZ Renewal Granted
11/16/1983
Public Notice Details BAL-19840611EO Assign License/CP Granted
06/21/1984
Public Notice Details BAL-19851227EN Assign License/CP Granted
02/18/1986
Transaction log data BR-19900730ZB Renewal Granted
04/01/1991
  BLSTA-19931116AAA Special Temporary Auth.-engineering Granted
01/19/1994
Public Notice Details BL-19950203AA License to Cover Granted
01/22/1996
Public Notice Details BAL-19960827EA Assign License/CP Granted
10/18/1996
Public Notice Details BAL-19970521EF Assign License/CP Granted
07/31/1997
Transaction log data BR-19970801XM Renewal Granted
01/14/1998
Public Notice Details BAL-19980205GK Assign License/CP Granted
02/23/1998
Public Notice Details BTC-19980622EN Transfer of Control Granted
08/13/1998
Public Notice Details BAL-19990202GG Assign License/CP Granted
02/26/1999
Public Notice Details BTC-19990901GH Transfer of Control Granted
09/08/1999
Public Notice Details BAL-19991126AAZ Assign License/CP Granted
12/27/1999
Public Notice Details BAL-20010508AAO Assign License/CP Granted
07/31/2001
Transaction log data BR-20050728ABF Renewal Granted
11/29/2005
  BSTA-20101021ADR Special Temporary Auth.-engineering Granted
10/25/2010
  BESTA-20110418AEP Extension Request Granted
06/08/2011
  BESTA-20111123DET Extension Request Granted
02/06/2012
  BESTA-20120907ADO Extension Request Granted
10/24/2012
Transaction log data BR-20130725ADB Renewal Granted
11/22/2013
Public Notice Details BMML-20121005AGW Modify License-Amendment Granted
11/26/2013
Public Notice Details BMML-20170322ABL Modification Granted
04/12/2018
Transaction log data 0000153790 Renewal Granted
11/22/2021
Transaction log data 0000247655 Extension Request Granted
08/05/2024
Transaction log data 0000233373 Special Temporary Auth.-engineering Granted
08/05/2024
Transaction log data 0000265142 Special Temporary Auth.-engineering Granted
08/26/2025
Transaction log data 0000289501 Administrative Update Received
02/10/2026
Transaction log data 0000276908 Extension Request Granted
02/17/2026
Transaction log data 0000289676 Extension Request Granted
02/17/2026
A red arrow means this application has additional transaction log history since July 1, 2014. Click the arrow to expand.
A blue arrow means that some details may be available through public notice data. Click the arrow to expand. (Provided by the REC Radio History Project)
IMPORTED LETTERS
Incoming letter or scanned documentBMML-20170322ABL04/12/2018
Imported LetterBMML-20170322ABL03/19/2018
Incoming letter or scanned documentBMML-20170322ABL01/24/2018
Incoming letter or scanned documentBMML-20170322ABL04/05/2017
Incoming letter or scanned documentBMML-20170322ABL03/22/2017
Incoming letter or scanned documentBMML-20121005AGW07/17/2013
Incoming letter or scanned documentBMML-20121005AGW07/01/2013
Incoming letter or scanned documentBMML-20121005AGW07/01/2013
STA relatedBESTA-20120907ADO10/24/2012
Incoming letter or scanned documentBMML-20121005AGW10/05/2012
Incoming letter or scanned documentBMML-20121005AGW10/05/2012
STA relatedBESTA-20111123DET02/06/2012
Incoming letter or scanned documentBSTA-20101021ADR10/26/2010
History card 01/01/1980
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