General Information

Serial #

L 867

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

Like

Dimensions

Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.

Length

67.0 cm

Width

21.5 cm

Height

19.5 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Communications

Category

Radio

Sub-Category

N/A

Manufacturer

AKA

Atwater Kent

Country

United States of America

State/Province

Pennsylvania

City

Philadelphia

Context

Country

North America

State/Province

Unknown

Period

THIS TYPE OF RADIO USED C. 1920S +

Canada

Unknown

Function

TO RECEIVE, DEMODULATE & AMPLIFY RADIO BROADCAST SIGNALS.

Technical

DESIGNED BY A-K FOR LISTENERS WHO LIVED NEAR HIGHER-POWERED LOCAL STATIONS, AND DID NOT NEED 2 RADIO AMPLIFIERS ON THEIR RECEIVERS. IT FEATUREDA COUPLED CIRCUIT TUNER, A SELF-RESONANT TUNABLE TRANSFORMER MADE UP OF 3 COILS: A ROTOR LIKE THAT IN THE TYPE 11 TUNER, A CLOSELY COUPLED SPHERICAL COIL WITH WHICH THE ROTOR RESONATED, AND AN OUTER COIL THAT ACTED AS THE PRIMARY OF THE TRANSFORMER. ITS DESIGN WAS A COMPROMISE BETWEEN SELECTIVITY & PRICE, AND WAS VERY POPULAR. (REF. 1)

Area Notes

Unknown

Details

Markings

Tuner component on mounted on extreme left bears plate reading " ATWATER KENT/ PHILA. PENSA./ PATENTS PENDING/ A-K/ MADE IN U.S.A./ TYPE 11 TUNER ". Tuner calibrated 100-0; terminal mountings labelled "A1", "A2", "A3" & "F G"./ Detector (?) bears plate reading "ATWATER KENT/ PHILA./ PATENTS PENDING"; all terminals labelled "MIN.", "MAX.", "P", "G", "+" & "-"./ " ATWATER KENT/ SWITCH " cast in raised print on switch housing./ Plate fixed to tuner reads " ATWATER KENT/ PHILA./ PATENTS PENDING ". Tuner calibrated 0-100; terminal mountings labelled "A1", "A2", "A3" & "F G". "POTENTIOMETER" cast in raised print on housing: Plate screwed to potentiometer reads " ATWATER KENT/ PHILA./ PATENTS PENDING ". Component on extreme right bears plate reading " ATWATER KENT/ PHILA. TYPE TA/ PATENTS PENDING/ A-K/ MADE IN U.S.A./ DETECTOR AND 2 STAGE A.F. AMPLIFIER"."MIN.", "MAX.", "AMP'L.", "DET.", "A+", "A", "B" also indicated on casing. 4 terminal posts labelled "-A-B" ,"+A", "+20", and "+B". Paper label on underside of base reads " IMPORTANT/ Before inserting tubes be sure all wir-/ ing to batteries is correct./ Amplifier Tubes consuming not over/ 3/4 Ampere must be used./ A one Ampere Detector Tube may be used if desired./ Atwater Kent Mfg. Company/ Philadelphia, Pa./ Form 99. Printed in U.S.A., Oct., 1923. " Second paper label on base reads " L 867/ WARRANTY/ We guarantee the apparatus purchased from/ us to be free from all defects, both as to work-/ manship and material. This company, how-/ ever, does not assume any responsibility for any/ instrument which has been altered, dismantled/ or damaged by misuse./ Atwater Kent Mfg. Company/ Phila., Pa./ Form No. 101. Printed in U.S.A., Sept., 1923. ".

Missing

APPEARS COMPLETE.

Finish

MOST COMPONENTS HAVE DARK BROWN MOLDED SYNTHETIC HOUSINGS; DETECTOR & AMPLIFIER HAS OLIVE GREEN ENAMEL FINISH ON LOWER HALF OF UNIT. WOODEN BASE HAS STAINED & VARNISHED FINISH.

Decoration

N/A