Model: Radiola IV (4)
Antique radios, Old Time Radios
Radiola IV (4)
Country:
United States of America (USA)
Manufacturer/Brand:
RCA (RCA Victor Co. Inc.); New York (NY)
Year: 1922
Type:
Radio or TunerBroadcast receiver (Radio).
Im Gegensatz zu Radioempfängern für kommerzielle und/oder militärische Zwecke und den frühen Empfängern für Morsezwecke nennen wir hier Radio bzw. Rundfunkempfänger. Aber: Gemäss internationaler Sprachregelung führt der Radiokatalog Band 1 alle Empfänger mit aktiven Bauteilen als RADIO. Wir unterscheiden hier ebenfalls nicht, ob mit Röhren bestückt, hybrid, mit Transistoren oder/und ICs.
Mod.-ID = 54627
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Schematics etc.: 1 (for
members)
Principle
TRF with reaction (regenerative); 2 AF-stage(s)TRF (tuned radio frequency or straight receiver) with manual regenerative (feed-back) control.
Récepteur TSF à amplification directe avec réaction maneuvrable.
Geradeausempfänger mit bedienbarer Rückkopplung, die auch zum Selbstschwingen führen kann. Siehe «Radios von gestern» Seite 59.
Wave bands
Broadcast only (MW).Mittelwellenempfänger
Power type and voltage
Dry BatteriesDry battery supply. Alimentation de batterie
Batteriespeisung mit Trockenelementen.
Das Gerät erhält seine Betriebsspannungen von nicht aufladbaren Batterien (Primärzellen).
Solche Geräte wurden auch mit sogenannten Netzanoden gespiesen, die zumindest die Anodenspannung lieferten, in manchen Fällen auch Gittervorspannungen und teilweise auch Heizspannungen.
Loudspeaker/pwr.out
Horn LoudspeakerHorn loudspeaker.
Haut-parleur à cornet ou à pavillon.
Trichterlautsprecher, also Schalldosen bzw. Membranen-Prinzip bzw. auch Kopfhörer durch Trichter als mech. Verstärker. Siehe «Radios von gestern» Seiten 329ff.
www.radiomuseum.org
Model: Radiola IV (4)
Material
Wooden caseWooden case. Most radios have a wooden cabinet until the WW2. Caisse en bois.
Die meisten Heim-Rundfunkempfänger führen von Beginn an bis etwa Ende 60er Jahre Holz als Gehäuse. Auch frühe Reiseempfänger zeigen Holz (speziell in den 20er Jahren) oder Holz mit Stoffüberzug etc.
Shape
Tablemodel, low profile (big size).
Valves / Tubes
3:
UV199Spezieller Sockel nur für diese Röhre.
(more
for members)
Notes
Built in speaker. 2 front doors.
Although already specified July 25, 1922 the Radiola IV was not available until after the Christmas selling season due to shortage of UV199. The tubes could not be made in necessary quantities.
Price in first year of sale
275
$
Collectors prices
1 Collector price
(for members)
External source of data
Ernst Erb
Source of data
Radio Collector`sGuide 1921-Radio Collector`sGuide 1921-; McMahon, Morgan E.; Vintage Radio, CA90274, USA. (1981)
Mentioned in
Collector's Guide to AR4.Ed.,Bunis, tubeCollectors Guide to Antique Radios, Fourth Edition, 1997, Marty & Sue Bunis, Collector Books, Paducah, USA. See also the other editions.
Literature/Schematics
Radio Manufacturers of the 20s Vol 3, DouglasRadio Manufacturers of the 1920s Volume 3, 1988, Alan Douglas, The Vestal Press Ltd., USA.
Ebay Nr. 190088778885 Bild bearbeitet.
Ebay Nr. 190088778885 Bild bearbeitet.
Ebay Nr. 190088778885 Bild bearbeitet.
More pictures
Further information on
Radiola IV (4) (RCA (RCA Victor Co. Inc.); New York (NY))
Thanks to Ramon Gancedo , Madrid, Spain who decided to scan some pages of the RCA-Manual for www.radiomuseum.org and Thomas Günzel , Ulm, Germany who did the OCR-Recognition I am (after correcting OCR - there may be still some small errrors) able to present you an article which shows the function, the build up and the operation of a Regenerative Receiver and Amplifier. We now worked the same way for model Radiola IV.
INTRODUCTION
RADIOLA IV is a complete dry cell operated vacuum tube regenerative receiver and amplifier, including a self-contained loud speaker. The only accessories not provided are the antenna equipment and ground connection. Full instructions are given in another section for the erection of antenna and for the ground connection.
UNPACKING
UNPACKING Radiola IV is so important a step that it will be found well worth while to follow these directions carefully. Radiola IV is wrapped in waxed paper as a protection against moisture, and is suspended in a special shock absorbing cradle. The rounded openings at either side of the case allow place for the hands to grasp the entire cradle and lift it free from the case. Next cut away the suspension strings of the cradle, care being taken that Radiola IV is subjected to no severe jars as it is removed.
Remove waxed paper; turn cabinet bottom side up, placing it on a smooth soft surface to avoid scratching or marring the finish. When turning or handling cabinet, care should be used to prevent cover from opening, thereby damaging the finish, stay joint or hinges.
A package containing four (4) wooden feet and eight (8) screws will be found in bottom of packing case, held in place by burlap strip nailed to cleat.
These wooden feet are marked 1, 2, 3, 4, corresponding to same marks on bottom of cabinet. Feet should be screwed to cabinet and cabinet turned over and placed on its feet. Care should again be used in turning to keep cover closed.
The top of the case should now be lifted, whereupon the automatic catch will hold it in position. This exposes the vacuum tube cradle and the battery racks. No attempt should be made to remove the box to the right before the battery terminal board which holds it has been removed: loosening the thumbscrews at either end will accomplish this.
The box contains a pair of sensitive telephone receivers, a plug to accommodate the telephone cord tips, flexible silk covered connection cords with plugs for connecting to the antenna and ground posts of the antenna protector, two short connectors for use in connecting the three dry cells ("A" battery) and one UV-199 Radiotron. In the left rear of the cabinet interior there is a three compartment casting for holding the dry cells ("A" battery) in place.
For shipment, these compartments are used to hold three of the four vacuum tubes supplied with the set. The thumbscrews of the large clamp should be loosened to remove the tubes in their wadding.
The necessary batteries specified below are packaged separately and will be supplied by the retail dealer.
BATTERIES REQUIRED
A. Three dry cells 1½, volts each, for lighting the filaments, 2¨ý in. diameter or square by 6&fr
