EXHIBIT - World Radio History

22
EXHIBIT APPLICATION FOR CONSTRUCTION PERMIT TO INCREASE DAYTIME POWER FOR CLASS IV RADIO STATION KSET EL PASO, TEXAS DECEMBER, 1970 WILLIAM B. CARR & ASSOCIATES CONSULTING ENGINEERS 701217

Transcript of EXHIBIT - World Radio History

Page 1: EXHIBIT - World Radio History

EXHIBIT

APPLICATION FOR CONSTRUCTION PERMIT TO INCREASE DAYTIME POWER FOR

CLASS IV RADIO STATION KSET EL PASO, TEXAS

DECEMBER, 1970

WILLIAM B. CARR & ASSOCIATES CONSULTING ENGINEERS

701217

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William B. Carr & ASSOCIATES CONSULTING ENGINEERS

INDEX

FCC Form 301-VA

Engineering Statement

Table I Allocation Data

Table II Present Area and Population

Table III Proposed Area and Population

Figure A Allocation Study

Figure B 25 mV /m Contour

Figure C 5 and 2 mV /m Contours

Figure D Aerial Photograph

Figure E El Paso Business and Other Radio Stations

Figure F Plot Plan and Elevation

Figure G 1 v/m Contour

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FCC Form 301 FEDERAL COMMUNICATIONS COMMISSION section V -A

STANDARD BROADCAST ENGINEERING DATA

Name of applicant

Rio Grande Broadca sting Company, Inc.

I. Indicate by check mark the purpose of this for, each category are shown to the right of

[-]Construct a new station [ _ (Change station location to a different

city or town (X 1Change power

]Change transmitter location [Change frequency []Change from DA to Non -DA [_ ]Change from NonDA to DA r 1C11ange In antenna system

(including increase in height

application. (The items of this Section that are applicable the category.)

Li Install new Auxiliary Transmitter FA Install new Alternate Main

Transmitter L] Change transmitter (non type

accepted) Li Change Main Studio Location to

All point outside city limits and not Items at trmntnitter alto

FT Change Hours of Operation [] Other (specify):

to, and must he answered

2 thru 7, and 10

2 thru 7

2 thru 7

by addition of FM or TV antenna) (and appropriate other items)

If this application is not for a new station, summarize briefly the nature of the changes proposed:

To change transmitter and increase daytime power. .

2. Facilities requested 10. Antenna system. including ground or counterpoise Frequency

1340 kHz

Hours of operation

Unlimited Power in kilowatts Night Day

.25 1 7 0

Non -Directional Antenna: Directional Antenna:

Day only (DA -D) DaY ® Night Kil

Night only (DA -N) 0 Same constants and power day 0 and night (DA -I) Different constants or power

day and night (DA -2)

(If a directional antenna Is proposed submit complete engineering data Show clearly whether directional operation is for day or night or both. If day and night patterns are different give full information on each pattern. This information is In addition to the information in Paragraph IO and is submitted as Exhibit No. and signed by the engineer who designed the antenna system.)

3. Station location State

Texas City or town

El Paso 4. Transmitter location State

Texas County

El Paso City or tom

El Paso Street Address (or other identification)

4530 Delta Street Type radiator

Triangular, uniform __cross se_ction,

Height in feet of complete radiator above base insulator, or above base If grounded.

250' 5. Rain atudlo location guyed Overall height in feet above grow (Without obstruction lighting)

225' (stte

Texas COunty

El Paso Overall height in feet above mean sea level. (Without obstruction lighting)

3960' City or town

El Paso Street and number, If known

904 Magoffin Avenue Overall height in feet above ground. (with obstruction lighting)

2581 6. Remote comlrol point location Overall height in feet above seam )ea level. (With obstruction lighting)

3963'

State

Texas rCity or town

fill

El Paso If antenna is either top loaded or see- tionalized, describe fully as Exhibit No.

_Does not apply Street Address (or other identification)

904 Magoffin Avenue Excitation Series Shunt

7. Transmitter Geographic coordinates to nearest second. For direction antenna give coordinates of center of array. For single vertical radiator give tower location.

Make

CA

Type No.

AM -1000D

Rated Power

1.0 kw North latitude o

31 45 40

west longitude

106 26 11 (If the above transmitter has not been accepted for licensing by the F.C.C.. at- tach as Exhibi No. a complete showing of transmitter details. Showing should include schmatic diagram and full details of frequency control. If changes are to be made In licensed tranmltter include schematic diagram and give full details o? change.)

If not fully described above, give further details and dimensions including any other antennas mounted on tower and associated isolation circuits as Exhibit

No (Height figures should not include obstruction lighting.)

Subnit as Exhibit No. * a plat of the transmitter site showing boundary lines, and roads, rail roads. or other ohstructtons, and also layout of the ground system or counterpoise. Show number and dimensions of ground radials or if a counter- poise is used. show height and dimensions.

8. Modulation monitor

RCAMfg. Co .

TYPe No.

W M 43-A II. Attach as Exhibit No. * a sufficient number of aerial photographs

taken in clear weather at appropriate altitudes and angles to permit Identifica- tion of all structures in the vicinity. The photographs must be marked so as to show compass directions, exact boundary lines of the proposed site. and lore - tions of the proposed 1000 v /m contour for both day and night operation. Photo - graphs taken in eight different directions from an elevated position on the ground will be acceptable in lieu of the aerial photographs If the data referred to can be clearly shown.

9. Frequency monitor

Sate

RCA Mfg. Co. ripe No.

WF 48 -A

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FCC Form 301 STANDARD BROADCAST ENGINEERING DATA Section V -A, Page 2

12. Allocation Studies

A. Attach as Exhibit No. * map or maps, having reasonable scales, showing the 1000, 25, 5, 2, normally protected and interference -free contours in my /m for 'loth day and night operation both existing and as proposed by the application. (NOTE The 2 my /m night contour need not be supplied if service is not rendered thereto.)

B. (1) For daytime operation, attach as Exhibit No * an allocation study, utilizing Figure M -3 of the Rules or an accurate full scale reproduction thereof and using pertinent field strength measurement data where available, a full scale exhibit of the entire pertinent area to show the following:

(a) normally protected, the interference -free, and the interfering contours for the proposed operation along all azimuths.

(b) Complete normally protected and interference -free contours of all other proposals and existing stations to which objectionable interference would be caused.

(c) Interfering contours over pertinent arcs of all other proposals and existing stations from which objectionable inter- ference would be received.

(d) Normally protected and interfering contours over pertinent arcs of all other loposals and existing stations which require study to show the absence of objectionable interference. (e) The 0.1 my /m groundwave contour of Class I -B stations and appropriate studies to establish compliance with Sec- tion '73.187 when operation is proposed on a U. S. Class I -B channel.

(f) Plot of the transmitter location of each station or proposal requiring investigation, with identifying call letters, file numbers, and operating or proposed facilities. (g) Properly labeled longitude and latitude degree lines, shown across entire exhibit.

(2) For daytime operation, when necessary to show more detail, attach as Exhibit No. * an additional allocation study, utilizing World or Sectional Aeronautical charts to clearly show interference or absence thereof.

(3) For daytime operation, attach as Exhibit No * a tabulation of the following: (a) Azimuths along which the groundwave contours were calculated for all stations or proposals shown on allocation study exhibits required by Paragraph 1213 above.

(b) Inverse distance field strength used along each azimuth. (c) Basis for ground conductivity utilized along azimuths specified in (3) (a). If field strength measurements are used, the measurements must be either submitted or be properly identified as to location in Commission files.

For nighttime operation, attach as Exhibit No. on file , allocation data to include the following: (1) Proposed nighttime limitation to other existing or proposed stations with which objectionable interference would result, as well as those other proposals and existing stations which require study to clearly show absence of objectionable interference

(2) All ex :.-zing or proposed nighttime limitations which enter into the nighttime R.S.S. limitation of each of the existing or proposed facilities investigated under C (I) above.

(3) All existing and proposed limitations which' contribute to the R.S.S. nighttime limitation of the proposed operation, together with those limitations which must be studied before being excluded. (4) A detailed interference study plotted upon an appropriate scale map if a question exists with respect to nighttime inter- ference to other existing or proposed facilities along bearings other than on a direct line toward the facility considered. (5) Utilizing an appropriate scale map, clearly show the normally protected and interference -free contours of each of the existing and proposed stations which would receive nighttime interference from the proposed operation.

(6) The detailed basis for each nighttime limitation calculated under C (l') (2) (3) and (4) above, including a copy of each pertinent radiation pattern in the vertical plane and basis therefor.

13. Attach as Exhibit No * tables of the areas and populations within the contours included in Paragraph 12 (A) above, as well as within the normally protected and interference -free contours of each station or proposed operation to which interference would be caused according to the Commission Rules.

(NOTE: See the Standard Broadcast Technical Standards. All towns and cities having populations in excess of those given in Section 3.182(g) are not to be included in the tabulation of populations within the service contours. The latest Census Minor Civil Division maps are to be used in making population counts, subtracting any towns or cities not receiving adequate service, and where contours cut a minor division assuming a uniform distribution of population within the division, to determine the population included in the contours unless a more accuract count is made.)

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FCC Form 301 STANDARD BRCADCAST ENGINEERING DATA Section V - A, Fage :t

14. Attach as Exhibit No. * map or mans having reasonable scales clearly showing the following:

(a) Pr -posed antenna location

(b) General character of the city or metropolitan district, particularly the retail business, wholesale

business, manufacturing, residential, and unpopulated areas (by symbols, cross -hatching, colored crayons,

or other means)

(e) Heights of buildings or other structures and terrain elevations in the vicinity of the antenna, indicating

the location thereof.

(d) Transmitter location and call letters of all radio stations (except amateur) and the location of established

commercial and government receiving stations within 2 miles of the proposed transmitter location. Call letters

and locations of broadcast stations, including FM and television, within 5 miles must be shown.

(e) Terrain

15. If thins application is for modification of construction permit state briefly as Exhibit No.

status of construction and indicate when it is expected that construction will be completed.

* the present

* See Engineering Statement

I certify that I represent the applicant in the capacity indicated below and that. I have examined the foregoing statement of technical

information and that it is true to the best of my knowledge and belief.

Date December 21, 1970 Signature ncerk npprnprinlr m.r brlwu )

n Technical Director Q Chief Operator

IJRegistered Professional Engineer

I1Consulting Engineer

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William B. Carr & ASSOCIATES CONSULTING ENGINEERS

ENGINEERING STATEMENT OF WILLIAM B. CARR OF THE FIRM OF WILLIAM B. CARR AND ASSOCIATES IN CONNECTION WITH THE APPLICATION OF RIO GRANDE BROADCASTING COMPANY, INC.

FOR CONSTRUCTION PERMIT TO INCREASE THE DAYTIME POWER OF RADIO STATION KSET, EL PASO, TEXAS

INTRODUCTION

I, William B. Carr, am an engineer associated with the firm of

William B. Carr and Associates, Consulting Engineers, with offices

located at 4028 Daley, Fort Worth, Texas . I am a graduate from The

University of Texas with a Bachelor of Science Degree in Electrical

Engineering and a Registered Professional Engineer in the State of

Texas. My qualifications as an engineer are a matter of record with

the Federal Communications Commission. This firm has been retained

by Rio Grande Broadcasting Company, Inc., licensee of Radio Station

KSET, El Paso, Texas, to prepare the necessary engineering to in-

crease their daytime power with all other operating parameters re-

maining the same.

Radio Station KSET is presently authorized to operate on 1340 kHz with

a power of 250 watts using a nondirectional antenna, unlimited time,

in El Paso, Texas. Radio Station KSET proposes to increase its day-

time operating power to 1, 000 watts while retaining its nighttime power

of 250 watts. KSET presently shares an antenna system with Radio

Station KELP, El Paso, Texas, operating on 920 kHz, 1,000 watts

701217

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William B. Carr & ASSOCIATES CONSULTING ENGINEERS

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nondirectional daytime and 500 watts directional nighttime. With

KSET's present antenna system an increase in daytime power to 1,000

watts would produce an unattenuated field of 205 mV /m. No other

changes in the antenna system or operating parameters are proposed

for Radio Station KSET. An increase in KSET's daytime power should

in no way affect the operation of Radio Station KELP as the filters

previously installed are capable of handling the additional KSET power.

SOIL CONDUCTIVITY

According to the Federal Communications Commission M -3 Soil

Conductivity Map El Paso is situated in a region assigned a soil

conductivity of 4 and 8 millimhos per meter. Computation of all the

proposed KSET coverage contours as well as the pertinent contours

of other stations considered for interference were made by use of the

M -3 soil conductivity map shown in Figure A.

In cases where signals traversed soils of different conductivity the

distance to each contour was determined by the "equivalent distance

method" in accordance with the Federal Communications Commission

Rules and Regulations.

CHANNEL CONSIDERATIONS

Figure A is an allocation map prepared on an official Federal Commu-

nications Commission M -3 Soil Conductivity Map and shows the

701217

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William B. Carr & ASSOCIATES CONSULTING ENGINEERS

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interference considerations with the neighboring stations on the same

channel as well as adjacent channels. A detailed discussion of

interference is given in the following section. Both the present and

proposed 0.5 and 0.025 mV /m contours for KSET are shown in Figure A.

INTERFERENCE CONSIDERATIONS

KSET's frequency (1340 kHz) is a local channel; therefore, the daytime

conditions of allocation prevail. These conditions are reflected in

Figure A. Table I is a list of stations considered for interference to

or from the proposed KSET operation. Each station considered is studied

separately below:

KSIL, Silver City, New Mexico - As shown in Figure A no interference exists either way between the proposed contours of Station KSET. A separation of 11 miles exists between the proposed KSET 0.5 mV /m contour and the present 0.025 mV /m contour of Station KSIL. The proposed 0.025 mV /m contour of Station KSET falls short by 10 miles of the 0.5 mV /m contour of KSIL.

KRRR, Ruidoso, New Mexico - KRRR presently operates on 1340 kHz with a power of 1.0 kw daytime and 0.25 kw night- time. KRRR is presently authorized to shift frequencies to 1360 kHz with a power of 5 kw daytime. However, for the purpose of interference considerations KRRR's present opera- tion on 1340 kHz was considered. KRRR's present 0.025 mV /m contour falls short of the proposed 0.5 mV /m contour of KSET by 1.1 miles. Likewise, KSET's proposed 0.025 mV /m contour falls short of KRRR's present 0.5 mV /m contour by 0.1 miles. Thus, no interference will exist between the two facilities.

701217

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William B. Carr & ASSOCIATES CONSULTING ENGINEERS

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KVKM, Monahans, Texas - Station KVKM operates on a frequency of 1330 kHz with a power of 5,000 watts non - directional daytime and 1,000 watts directional nighttime. The proposed 0.5 mV /m contour of Radio Station KSET is separated by 120.5 miles from the 0.5 mV /m contour of KVKM. Thus, no prohibited overlap exists between the proposed operation of KSET and KVKM.

Co- channel interference was calculated on the basis of a ratio of 20 :1

of desired to undersired signal. The interference ratio of 10 kHz

separation was taken as 1:1 and 30 :1 for signals of 20 kHz removed.

These ratios are in accordance with the Federal Communications

Commission Rules and Regulations for prohibited overlap.

SIGNAL SERVICE TO THE CITY OF EL PASO

With the present daytime power of Radio Station KSET the 25 mV /m

signal does not totally encompass the main business district. How-

ever, with the increase in daytime power the proposed 25 mV /m daytime

contour of KSET will encompass the main business district. The night-

time service will remain the same as that now provided by KSET.

POPULATION AND AREA SERVED

All land areas within each contour was determined by the use of a

compensating polar planimeter or circular area formulas as per good

engineering practices. Population data was taken from publications

of the 1960 Census by the United States Department of Commerce,

Bureau of Census, Final Report PC(1) -45A with pertinent contours

plotted on minor civil division maps.

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William B. Carr & ASSOCIATES CONSULTING ENGINEERS

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When a contour cut a division the population was evenly proportioned

according to the measured area of the division within the contours.

Cities within the 0.5 mV /m contour, but outside the 2 mV /m contour,

that have a population of 2,500 or more were excluded from the count.

Tables II and III show the present and proposed area and contour served.

The population within the 1,000 mV /m contours both present and pro-

posed were obtained by count of persons residing in the area.

CONCLUSIONS

It is shown by this engineering statement that no objectionable overlap

or interference will be caused to any existing or proposed operations

by KSET increasing its daytime power to 1,000 watts . It is our con-

clusion that the operation of Radio Station KSET is in full accord and

compliance with the Federal Communications Commission Rules and

Regulations.

Respectfully submitted,

WILLIAM B. ARR Registered Professional Engineer State of Texas

Subscribed and sworn to before me this 21st day of December, 1970

C.. lïI 14( ;C /-

Nota ry Public i nd for Tarrant County, Texas My Commis sip expires June, 1971

701217

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William B. Carr & ASSOCIATES

RADIO STATION KSET EL PASO, TEXAS

PRESENT OPERATION

CONSULTING ENGINEERS

Frequency 1340 kHz

Power 250 watts nondirectional

Type of tower Uniform cross -section, guyed, series -fed tower

Tower height above insulator

Tower height above ground

250' without lighting 253' with lighting

255' without lighting 258' with lighting

Tower height above mean sea level 3960' without lighting 3963' with lighting

Ground system * 32' x 32' ground screen plus 120 radial 250' long except as extended west as part of existing KELP ground system.

Inverse distance field 102.5 mV /m

Geographic coordinates 31° 45' 40" North Latitude 106° 26' 11" West Longitude

* Tower is southeast (No. 3) tower of existing KELP array. Ground system is existing KELP ground system.

701217

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William B. Carr & ASSOCIATES CONSULTING ENGINEERS

Frequency

Power

Type of tower

RADIO STATION KSET EL PASO, TEXAS

PROPOSED OPERATION

1340 kHz

Tower height above insulator

Tower height above ground

Tower height above mean sea level

Ground system *

Inverse distance field

Geographic coordinates

1.0 kw daytime, nondirectional 0.25 kw nighttime, nondirectional

Uniform cross -section, guyed, series -fed tower

250' without lighting 253' with lighting

255' without lighting 258' with lighting

3960' without lighting 3963' with lighting

32' x 32' ground screen plus 120 radial 250' long except as extended west as part of existing KELP ground system.

205 mV /m for 1 kw

31° 45' 40" North Latitude 106° 26' 11" West Longitude

* Tower is southeast (No. 3) tower of existing KELP array. Ground system is existing KELP ground system.

701217

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Page 14: EXHIBIT - World Radio History

William B. Carr & ASSOCIATES CONSULTING ENGINEERS

TABLE II

RADIO STATION KSET EL PASO, TEXAS

AREAS AND POPULATIONS OF PRESENT OPERATION

Contour Area -Sq Mi Population Served

1000 mV /m 0.05 6

25 16 95,898

5 110 255,621

2 295 291,045

0.5 1030 306,958

701217

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William B. Carr & ASSOCIATES CONSULTING ENGINEERS

TABLE III

RADIO STATION KSET EL PASO, TEXAS

AREAS AND POPULATIONS OF PROPOSED OPERATION

Contour Area -Sq Mi Population Served

1000 mV/rn 0.11 237

25 40 172,689

5 228 272,962

2 540 302,283

0.5 1950 320,820

701217

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Page 20: EXHIBIT - World Radio History

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701217

P LOT PLAN RADIO STATION KSET

EL PASO , TEXAS

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PREPARED BY

THE FIRM OF WILLIAM B. CARR AND ASSOCIATES CONSULTING ENGINEERS

FT. WORTH, TEXAS