Electronics World articles Popular Electronics articles QST articles Radio & TV News articles Radio-Craft articles Radio-Electronics articles Short Wave Craft articles Wireless World articles Google Search of RF Cafe website Sitemap Electronics Equations Mathematics Equations Equations physics Manufacturers & distributors LinkedIn Crosswords Engineering Humor Kirt's Cogitations RF Engineering Quizzes Notable Quotes Calculators Education Engineering Magazine Articles Engineering software RF Cafe Archives Magazine Sponsor RF Cafe Sponsor Links Saturday Evening Post NEETS EW Radar Handbook Microwave Museum About RF Cafe Aegis Power Systems Alliance Test Equipment Centric RF Empower RF ISOTEC Reactel RF Connector Technology San Francisco Circuits Anritsu Amplifier Solutions Anatech Electronics Axiom Test Equipment Conduct RF Copper Mountain Technologies Exodus Advanced Communications Innovative Power Products KR Filters LadyBug Technologies Rigol TotalTemp Technologies Werbel Microwave Windfreak Technologies Wireless Telecom Group Withwave Sponsorship Rates RF Cafe Software Resources Vintage Magazines RF Cafe Software WhoIs entry for RF Cafe.com Thank you for visiting RF Cafe!
Innovative Power Products Passive RF Products - RF Cafe

Cafe Press

Amplifier Solutions Corporation (ASC) - RF Cafe
RF Cascade Workbook 2018 - RF Cafe

RCA Victor Portable Table Phonograph Electrola Model R−95
Radio Service Data Sheet
July 1936 Radio-Craft

July 1936 Radio-Craft

July 1936 Radio Craft Cover - RF Cafe[Table of Contents]

Wax nostalgic about and learn from the history of early electronics. See articles from Radio-Craft, published 1929 - 1953. All copyrights are hereby acknowledged.

Victor Electrola Portable Phonograph - RF Cafe

Victor Electrola portable phonograph - probably not the R−95

The RCA Victor Portable Table Electrola Model R−95 is a record player / turntable / phonograph (choose your terminology) with a built-in audio amplifier and voice coil speakers speakers. Many portables of the day were all mechanical with hand cranks for power and one of the big horn sound amplifiers like on the Victrolas (note the R−95 is called an "Electrola"). Little information is available for it on the Web, and I could not find any photos. "Portable" back in 1936, when this schematic and datasheet appeared in Radio−Craft magazine, meant it might be possible for a person of moderate strength to lug it around and set it up on a table. An accompanying hernia was often involved. There are still many people who restore and service vintage radios and phonographs, so I post these when run across. A growing list of all data sheets can be found at the bottom of the page.

RCA Victor Portable Table Electrola Model R−95

RCA Victor Portable Table Electrola Model R-95 Radio Service Data Sheet, July 1936 Radio-Craft - RF Cafe(Synchronous motor; takes records up to 12 ins.; pickup and tone arm in 1 unit; 8 in. dynamic speaker.)

The voltages on the illustration at the left are measured from the tube socket terminal to the negative side of the electrolytic condensers. Voltages should be within ± 2.0%, as measured on a 1,000 ohm-per-volt meter. Values over 50 V. should be read On the 250 V. scale, while those under are taken from the 50 V. scale. Since a voltage-doubling circuit is employed in this instrument, it cannot be used on D.C. The power consumption is 75 W. total and the power output is 2 W. Turntable speed is standard 78 r.p.m. The motor is started by giving it a clockwise spin with the hand. Difficult starting may be cured in many cases by applying a small amount of oil to the bearing surfaces of the motor. A small amount of hum when the motor is starting, decreasing to a negligible amount when running is entirely normal. If there is excessive vibration either when starting or running, the motor supports should be examined and the position of the leather washer on the center bearing should be checked. It should be under the steel washer. After a long period of operation, the spacer cushions of the pickup may become hard and should be replaced. The viscoloid block which is attached to the front end of the armature shank serves as a mechanical filter to eliminate undesirable resonance and to cause a uniform frequency response. If the block is replaced it will be necessary to heat the shaft slightly to hold it firmly to the viscoloid block.

 

 

Posted October 8, 2023
(updated from original post on 8/27/2015)


Radio Service Data Sheets

These schematics, tuning instructions, and other data are reproduced from my collection of vintage radio and electronics magazines. As back in the era, similar schematic and service info was available for purchase from sources such as SAMS Photofacts, but these printings were a no-cost bonus for readers. There are 227 Radio Service Data Sheets as of December 28, 2020.

RF Electronics Shapes, Stencils for Office, Visio by RF Cafe

About RF Cafe

Kirt Blattenberger - RF Cafe Webmaster

Copyright:
1996 - 2024

Webmaster:

Kirt Blattenberger,

BSEE | KB3UON

RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while tying up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

Copyright  1996 - 2026

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.

My Hobby Website: AirplanesAndRockets.com | My Daughter's Website: EquineKingdom

TotalTemp Technologies (Thermal Platforms) - RF Cafe

Innovative Power Products Passive RF Products - RF Cafe

Anritsu Test Equipment - RF Cafe