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 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

Copper Mountain Technologies (VNA) - RF Cafe

Anritsu Test Equipment - RF Cafe

Please Support RF Cafe by purchasing my  ridiculously low-priced products, all of which I created.

RF Cascade Workbook for Excel

RF & Electronics Symbols for Visio

RF & Electronics Symbols for Office

RF & Electronics Stencils for Visio

RF Workbench

T-Shirts, Mugs, Cups, Ball Caps, Mouse Pads

These Are Available for Free

Espresso Engineering Workbook™

Smith Chart™ for Excel

Philco Model 59, 4-Tube A.C. Midget Superheterodyne Receiver
Radio Service Data Sheet
April 1936 Radio-Craft

April 1936 Radio-Craft

April 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.

Philco Model 59 (TubeRadioLand.com) - RF Cafe

Philco Model 59 (TubeRadioLand.com)

Here is a video of the restoration process.

This Radio Service Data Sheet from a 1936 issue of Radio-Craft magazine covers the Philco Model 59, 4-tube AC Midget superheterodyne receiver. Evidently there were at least three versions of this, a tabletop radio, a compact tabletop model (59C), and an "Owl's Eye" model (59S). I'm not sure what the difference is. Most - if not all - electronics servicemen had subscriptions to these magazines because they were a ready source of not just these service sheets, but because of the extensive articles offering advice on servicing radios and televisions. In fact, many electronics manufacturers had a policy of supplying service data only to bona fide shops. A large list is included at the bottom of the page of similar documents from vintage receiver schematics, troubleshooting tips, and alignment procedures. They were originally published in magazines like Radio-Craft, Radio and Television News, Radio News, etc. I scan and post them for the benefit of hobbyists who restore and service vintage electronics equipment.

Philco Model 59, 4-Tube A.C. Midget Superheterodyne Receiver Radio Service Data Sheet

 - RF Cafe(Broadcast band; police calls on lowest band; high sensitivity; high power output for its size.)

This midget superheterodyne operates only on 105-125 V. A.C. Total power consumption is 52 W. When tuning the set, use an accurate signal generator. To adjust I.F.T., remove cap lead of VI and attach generator lead in its place. Set volume control at full-on position and receiver dial at 600, and set C1 and C2 for maximum output. Next replace cap on VI, and set receiver tuning dial so that condenser plates are just starting to mesh. Set signal generator at 1,400 kc. and tune in the signal by means of condensers C3 and C4. Replace the dial pointer in the proper position. An output meter should be attached to the primary of the output transformer.

The final adjustment must be made with the sensitivity control condenser, C5. With the set connected to an antenna, tune in a station at about 130 on the dial. With a screwdriver, turn the small fibre hex-head screw which is located at the back of the chassis directly below the antenna and ground terminals. until the set squeals (circuit oscillates). Then turn the hex-screw 1/4 -turn back until the oscillation stops. Tune in other stations at all parts of the dial to make certain that there is no squeal or oscillation at any point. If the tube V2 is replaced it will be necessary to readjust condenser C5.

Voltages are given in the following table:

Above voltages are taken with a line supply voltage of 115 V. They should be taken from the underside of the chassis using test prods and a suitable A.C. voltmeter for the filaments and a high-resistance, multi-range D.C. instrument for all other readings. The volume control is set at maximum and the station selector at the low-frequency end of the band. Readings taken with a plug-in adapter will not be satisfactory.

The following table gives the color code of the power transformer:



Posted June 17, 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.

Windfreak Technologies Frequency Synthesizers - RF Cafe

Exodus Advanced Communications Best in Class RF Amplifier SSPAs