Delco Manuals: Radio Model 633, Delcotron Generator - Delco Radio Owner's Manual Model 633, Delcotron Generator Installation
by Delco-Remy Division
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[Transcriber's Note: This ebook contains two manuals by Delco: Delco Radio Owner's Manual Model 633 and Delcotron Generator Installation. They are separated by a divider.

In the list on pages 10 and 11 of Delco Radio Owner's Manual Model 633, the second station line for Tulsa (which is CFRB 690) has been removed, as it is believed to be an accidental reprinting of the following station line. Redundant headers and (foot)notes on these pages have also been removed.]




This model of the Delco Radio is a six-tube super-heterodyne receiver designed for operation with a HEADER type speaker. It comprises the best in automotive radio engineering, featuring Syncro-Tuning—the newest, most efficient antenna circuit yet developed, and Sensitivity Control.

The speaker and remote control unit are supplied in separate packages and are available in a wide variety of types and styles, depending upon the make and model of car the unit is to be used on.

The package contains:

Part No.

1 Receiver Unit, complete with tubes

1 Speaker Unit (less Adapter) 1210934

1 Combined Drilling Template and Radio—Dash Spacer

2 Chassis Mounting studs, 1/4—20 x 2-1/2 1207562

2 Chassis Mounting Shakeproof Washers 1208565

2 Chassis Mounting Nuts, 1/4—20 120375

1 Antenna Lead 1209622

1 Distributor Suppressor 1207818

1 Generator Condenser 1849014

1 Ammeter Condenser 1209333



See Instructions in antenna package.


This receiver may be installed on any car with Positive or Negative ground without any changes of wiring.

When possible, locate the chassis on the driver's side of the dash, over the steering column, with the removable cover plate facing the floor. This position places the control shafts on the end of the case facing the center of the car.

Locate the position of the mounting holes by means of the template included in the package. Drill the holes, using a 3/8" drill, and scrape the paint from around the holes on the engine side of the dash to insure a good ground connection as there is no other ground connection for this receiver.

Make sure that all tubes and the vibrator are pushed well down in their sockets and that all the grid clips are properly in place on the top caps of their respective tubes.

If a six-volt storage battery is available, check the receiver for normal operation before permanently installing it on the car. The antenna lead and control unit may be temporarily connected for this test.

Insert the two receiver mounting studs in the back of the receiver case with the "burred" threads nearest the receiver to make sure that these studs do not enter the case far enough to cause damage to the receiver parts.

Install the receiver, using the drilling template as a spacer between the dash and the receiver case. Install the two shakeproof washers over the chassis mounting studs. Then tighten the mounting nuts to insure that the receiver case shall be thoroughly grounded to the dash.

Antenna Lead—

Attach the black antenna lead to the car antenna and plug the connector on the antenna lead into the receiver chassis as shown in the Installation Diagrams. Ground the pigtail of the antenna lead shield to a convenient body bolt. Keep antenna lead out of engine compartment to avoid possibility of ignition interference being picked up by the lead-in.


See Instructions in speaker package.

Remote Control Unit—

See Instructions in remote control package.


The volume control and station selector shafts are AUTOMATICALLY adjusted as follows:

1. Insert control cables in their respective bushings on the case (volume control is upper bushing when receiver is installed in the car), until they seat themselves and then tighten the set screws.

2. Turn the station selector knob to the right (clockwise) until it stops—then turn the knob counter-clockwise until it stops. The dial is now logged.

3. Turn the volume control knob clockwise until the knob turns hard. The volume control is now on full.

Eliminating Motor Interference—

Connect the ammeter condenser to the spring clip at the end of the wire containing the fuse holder by means of the self-threading screw on the side of the spring clip. Ground the other terminal of the condenser at any convenient point.

Install the generator condenser on the generator side of the generator cut-out as shown in the Diagram of Connections. DO NOT connect the flexible lead to the field terminal of the generator.

Remove the center distributor lead and insert the distributor suppressor in its place. Then plug the distributor lead into the suppressor.

Adjusting Delco Syncro-Tuning—

Turn the receiver on.

Tune-in a radio station which logs between 55 and 65 on the dial and gives the radio a signal BARELY AUDIBLE in the speaker WITH the VOLUME control FULL ON. A small snap button cap is located in the end of the receiver case beside the antenna lead connection. Remove the snap button cap by prying with a small screw driver.

By means of a small screw driver inserted in the hole which was covered by the small cap, adjust the Delco Syncro-Tuning condenser unit for maximum output in the speaker. Remaining on same station, readjust station selector for maximum volume and readjust the Delco Syncro-Tuning Condenser unit for maximum output. No further adjustment of this unit will be necessary as the receiver is now adjusted for best operation with your car antenna. Replace the snap button cap.


To Turn On Receiver—

Some control units have a small knob located below the center of the dial. If your receiver is equipped with this type of control push this small knob in as far as it will go. Other control units have a combination on-off switch and volume control knob. To turn on this type of control turn the knob clockwise until the switch clicks and the dial is illuminated.

Volume Control—

Turning the volume control knob toward the right increases the output of the receiver and turning it toward the left reduces the output.

How To Tune The Receiver—

Turn the volume control knob approximately half way to the right. Rotate the station selector knob slowly until a station is heard. Tune this station in until the minimum amount of background noise is heard. Increase or decrease the volume to the desired level by adjusting the volume control knob. Careful tuning will result in better tone quality from all stations.

If the program being received is from a powerful local station local interference may be practically eliminated by turning the sensitivity control to the LOCAL position. You then will get the best possible reproduction of that station's program.

Sensitivity Control—

The sensitivity control is located on the lower, left front corner of the receiver case and when turned to the LOCAL position it decreases the sensitivity of the receiver sufficiently to greatly reduce interference from street cars, electric signs, X-Ray machines, electrical machinery, power lines, etc. It will also eliminate interference from weak stations.

When the control is turned to the DISTANCE position the receiver is allowed to operate at maximum sensitivity.

Tone Control—

The tone control is located on the lower, right front corner of the receiver case. This control is to be adjusted at the operator's will. However, most experienced operators prefer to set it for maximum treble response when the car is operated at high speeds.

To Turn Off The Receiver—

If the control head has a key knob in the center pull the knob out until it clicks into the off position and the receiver ceases to operate. If you wish to lock the receiver, pull the knob all the way out of the control unit and carry it with you.

If you are using the type of control unit which has a combination on-off switch and volume control knob turn the knob to the left until the receiver ceases to operate.


Should your receiver fail to operate, first check the fuse located in the fuse holder in the ammeter cable. If you wish to remove your tubes and vibrator for test purposes, their location is indicated below.

Any further service work on your receiver should be referred to a competent radio service station.

When at home call your local




DATE RADIO INSTALLED...................



Abilene, Kans. KFBI 1050

Albuquerque, N. M. KOB 1180

Alexandria, Va. WJSV 1460

Amarillo, Tex. KGRS 1410 WDAG 1410

Ames, Iowa WOI 640

Asheville, N. C. WWNC 570

Atlanta, Ga. WSB 740

Atlantic City, N. J. WPG 1100

Baltimore, Md. WBAL 1060

Belle Plaine (Moose Jaw), Sask. CJRM 540

Billings, Mont. KGHL 950

Birmingham, Ala. WAPI 1140

Bismarck, N. D. KFYR 550

Boise, Idaho KIDO 1350

Boston, Mass. WBZ 990 WBZA 990 WEEI 590 WHDH 830 WNAC 1230

Brookings, S. D. KFDY 550

Brooklyn, N. Y. WBBR 1300

Buffalo, N. Y. WBEN 900 WGR 550 WKWB 1480

Chattanooga, Tenn. WDOD 1280

Chicago, Ill. WBBM 770 WCFL 970 WENR 870 WGN 720 WJJD 1130 WLS 870 WMAQ 670 WMBI 1080 KYW 1020

Charlotte, N. C. WBT 1080

Cincinnati, Ohio WLW 700

Clay Center, Nebr. KMMJ 740

Cleveland, Ohio WHK 1390 WTAM 1070

Colorado Springs, Col. KVOR 1270

Council Bluffs, Ia. KOIL 1260

Covington, Ky. WCKY 1490

Dallas, Tex. KRLD 1040 WFAA 800

Denver, Colo. KLZ 560 KOA 830

Des Moines, Ia. WOC 1000

Detroit, Mich. WWJ 920 WJR 750 WXYZ 1240

Eau Claire, Wis. WTAQ 1330

Edmonton, Alta. CJCA 730

Elmira, N. Y. WESG 1040

Fargo, N. D. WDAY 940

Fayetteville, Ark. KUOA 1260

Fort Wayne, Ind. WOWO 1160

Fort Worth, Tex. KTAT 1240 WBAP 800

Gainesville, Fla. WRUF 830

Gary, Ind. WIND 560

Great Falls, Mont. KFBB 1280

Harrisburg, Pa. WBAK 1430

Hartford, Conn. WDRC 1330 WTIC 1060

Havana, Cuba CMCQ 780 CMK 730 CMW 590 CMX 890

Hollywood, Cal. KFWB 950

Honolulu, Hawaii KGU 750

Hot Springs National Park, Ark. KTHS 1040

Houston, Tex. KPRC 920

Indianapolis, Ind. WFBM 1230

Jackson, Miss. WJDX 1270

Jacksonville, Fla. WJAX 900

Kalamazoo, Mich. WKZO 590

Kansas City, Mo. KMBC 950 WDAF 610 WOQ 1300

Knoxville, Tenn. WNOX 560

La Crosse, Wis. WKBH 1380

La Prairie (Montreal), Que. CRCM 910

Lawrence, Kans. WREN 1220

Lansing, Mich. WKAR 1040

Lincoln, Nebr. KFAB 770

Little Rock, Ark. KLRA 1390

Long Beach, Cal. KFOX 1250 KGER 1360

Los Angeles, Cal. KECA 1430 KFAC 1300 KFI 640 KHJ 900 KNX 1050

Louisville, Ky. WAVE 940 WHAS 820

Lulu Island (Vancouver Island), B. C. CRCV 1100

Madison, Wis. WHA 940

Mexico City, Mexico XEB 1030 XEN 711 XEW 910 XFG 638 XFI 818 XEFO 940 XETR 610

Miami Beach, Fla. WMBF 1300

Miami, Fla. WIOD 1300 WQAM 560

Milwaukee, Wis. WTMJ 620

Minneapolis, Minn. WCCO 810 WDGY 1180 WLB 1250 WRHM 1250

Montreal, Que. CKAC 730

Nashville, Tenn. WLAC 1470 WSM 650

Newark, N. J. WAAM 1250 WNEW 1250 WOR 710

New Orleans, La. WDSU 1250 WWL 850

New York, N. Y. WABC 860 WEAF 660 WFAB 1300 WJZ 760 WLWL 1100 WOV 1130

Norfolk, Nebr. WJAG 1060

Northfield, Minn. WCAL 1250

Oakland, Cal. KLX 880

Oklahoma, Okla. WKY 900 KOMA 1480

Omaha, Nebr. WOW 590

Ottawa, Ont. CRCO 880

Philadelphia, Pa. WCAU 1170

Piedras Negras, Coahuila XEPN 585

Pittsburgh, Pa. KDKA 980 WCAE 1220 WJAS 1290

Portland, Me. WCSH 940

Portland, Ore. KEX 1180 KGW 620 KOIN 940

Pullman, Wash. KWSC 1220

Raleigh, N. C. WFTF 680

Reading, Pa. WEEU 830

Reynosa, Tamaulipas XEAW 956

Richmond, Va. WRVA 1110

Rochester, N. Y. WHAM 1150

Salt Lake City, Utah KDYL 1290 KSL 1130

San Antonio, Tex. KTSA 1290 WOAI 1190

San Diego, Cal. KFSD 600 KGB 1330

San Francisco, Cal. KFRC 610 KGO 790 KPO 680 KTAB 560 KYA 1230

San Juan, Puerto Rico WKAQ 1240

Schenectady, N. Y. WGY 790

Seattle, Wash. KJR 970 KOL 1270 KOMO 920 KTW 1220

Shreveport, La. KTBS 1450 KWKH 850

Sioux City, Iowa KSCJ 1330

Sioux Falls, S. D. KSOO 1110

Spokane, Wash. KFPY 1340 KGA 1470 KHQ 590

Stevens Point, Wis. WLBL 900

St. Joseph, Mo. KFEQ 680

St. Louis, Mo. KMOX 1090 KWK 1350 WEW 760

St. Paul, Minn. KSTP 1460

Strathmore (Calgary), Alta. CFCN 1030

Superior, Wis. WEBC 1290

Syracuse, N. Y. WFBL 1360

Tallmadge, Ohio WADC 1320

Tampa, Fla. WDAE 1220

Toledo, Ohio WSPD 1340

Topeka, Kans. WIBW 580

Toronto, Ont. CRCT 960

Tulsa, Okla. KVOO 1140

Twp. of Kingston (Toronto), Ont. CFRB 690

Villa Acuna, Coahuila XER 735

Wheeling, W. Va. WWVA 1160

Wichita, Kans. KFH 1300

Windsor, Ont. CKLW 840

Winnipeg, Man. CKY 910

Yankton, S. D. WNAX 570

York, Pa. WORK 1000

Zion, Ill. WCBD 1080

[A] Stations listed include only those of 1000 watts power (or higher).

NOTE: Numbers following call letters indicate approximate dial setting.


(This Warranty not applicable outside U.S.A.)

Your Delco Radio Carries the Same Guarantee As Your Car

"The manufacturer warrants each new radio receiving set manufactured by it to be free from defects in material and workmanship under normal use and service, its obligation under this warranty being limited to making good at its factory or designated Branches any part or parts thereof which shall within ninety (90) days or 4,000 miles whichever expires first, after installation of such auto radio receiving set for the original purchaser, be returned to it with transportation charges prepaid and which its examination shall disclose to its satisfaction to have been thus defective; this warranty being expressly in lieu of all other warranties expressed or implied and of all other obligations or liabilities on its part, and the manufacturer neither assumes nor authorizes any other person to assume for it any other liability in connection with the sale of its products."

"This warranty shall not apply to any radio receiving set which shall have been repaired or altered outside manufacturer's authorized Service Stations in any way so as in the judgment of the manufacturer to affect its stability, or on parts not made or authorized by the manufacturer have been used for replacement or other purposes, nor which has been subject to misuse, negligence, or accident."



Form No. 2095 Printed in U. S. A.

=========================================================================== ===========================================================================


Rebuilt 1 55-D Delcotron Generator 1845985

Rebuilt by Delco-Remy. Division of General Motors, Anderson, Indiana, 46011 Made in U.S.A. 275829 Printed in U.S.A.

12-17-71 DR-7086



2. If it is necessary to rotate the slip ring end frame to match the unit being replaced, remove the thru bolts, separate frames just far enough to rotate to desired position and replace thru bolts.

CAUTION: Separating the end frame too far causes the brushes to drop on to the greased shaft. If this happens, remove end frame completely, clean brushes with clean cloth, reassemble springs and brushes retaining them in position with a pin (toothpick). Remove pin after frames are reassembled.


3. When reusing the original fan, pulley and collar, tighten shaft nut to 40 to 60 lb. ft. If torque wrench is not available, insert a 5/16" hex wrench in end of shaft and tighten nut until the spring washer is just flattened.

4. Install Delcotron(R) Generator and check belt tension, mounting bolt tightness and make sure all electrical connections are clean and secure.

IMPORTANT: Never operate the Delcotron(R) Generator without being connected to the battery. Never attempt to polarize the Delcotron(R) Generator.

DELCO-REMY Division of General Motors Anderson, Indiana BPI

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