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    • 1: Lamps to Batteries
    • 2: Batteries and Socket-Powers to Radios
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      • Correct Intermediate Frequencies for Model 90
      • Error in Model 90 Service Info (1-47)
      • Error in Philco Model 38-690 Tweeter Wiring
      • Evolution of Philco Model 19
      • Evolution of Philco Model 60
      • Evolution of Philco Model 89
      • Extra Coil in Model 19TX Front End
      • Notes on Model 116
      • Notes on Model 21
      • Phonograph Jack in Model 511 Series Philcos
      • Speaker Hookup, Models 14LZX-19LZX-19TX-91RX
      • Speaker Replacement, Model 511 Series
      • The Speaker Problem in early Philco Cathedrals (20-21-70-90)
      • Tuning Condenser Wiring Trouble – Models 20-21-70-90
      • Unusual “No Reception” Problem in Model 90
    • General
      • Bakelite Block Condenser Data
      • Early 30s Philco Wiring Color Codes
      • How to Decipher Philco Resistor Part Numbers
      • Philco Models With Photofinish
      • Should I Plug It In and Turn It On?
      • Suffix Letters in Philco Model Numbers
      • Three-Legged Capacitors in Postwar AM-FM Philcos
      • Tips on Audio Interstage Transformers
      • Why Doesn’t My Philco Have a Back?
    • Syl’s Restoration Topics
      • $1 Fix for Torn Speaker Cones
      • Crystal Cartridge Rebuilding
      • Horseshoe Pickup Rebuilding
      • Restuffing Can Caps
    • Techniques
      • A Fix for Warped Mystery Control Dials
      • Aligning Adapter for Mystery Control Philcos
      • Bakelite Capacitor Rebuild Without Desoldering
      • Band Switch Repair
      • Cleaning Philco Tuning Dials
      • Coil Winding Machine Plans – Counter Added
      • Dial Cord Stringing Diagram, Models 14-17-18-43-71-91-118, others
      • Dial Drive Rebuilding – Models 16, 34, 44, 144
      • Dial Drive Rebuilding – Models 116, 640, 643, 645, 650, 651, 655, 660, 665
      • DIY push button labels
      • Focusing a Philco (newer style) shadowmeter
      • How to “isolate” AC line noise (hash) from your workbench
      • Loctal Socket Problems and their Cure
      • Neutralization of Philco Neutrodyne-Plus Receivers
      • Philco 45-2769 Aligning Adaptor – What is it?
      • Rebuilding the Automatic Tuning Flex Coupling, ’37 and ’38 models
      • Rebuilding Philco Pilot Lamps
      • Re-creating “Dogbone” Resistors
      • Replacing Speaker Wires Without Drilling Rivets
      • Re-Stuffing Caps in Metal Cans
      • Rewinding Philco Coils
      • Rubber-Covered Wiring, 1939-1942 Philcos
      • Shadow Meter Coil Rewind
      • Stuck tuning control, how to unstick???
      • Veneering Tutorial
  • Resources
    • Resources – Alphabetical
    • Resources – Categorized
    • Other Useful Websites
  • PhilcoRadio.com
    • Philco Phorum
    • Philco Gallery
Menu
MENUMENU
  • Home
    • Contact Us
  • History
    • Introduction
    • 1: Lamps to Batteries
    • 2: Batteries and Socket-Powers to Radios
    • 3: Leadership in Radio
    • 4: Diversification and War
    • 5: Philco Service
    • 6: Other Philco Items
    • 7: Philco People
    • 8: The Later Years
    • 9: The End
    • Early Philco Products
    • The Century of Progress Radio
    • Early Philco Television Development
    • Other Philco Items
    • Philco Around the World
      • Philco in Australia
      • Philco in Canada
      • Philco in Other Parts of the World
      • Philco in the United Kingdom
      • The Tropics
        • 1939 Tropic Models
        • 1940 Tropic Models
        • 1941 Tropic Models
        • 1942 Tropic Models
        • 1946 Tropic Models
        • Later USA-built Tropics
        • Philco Tropic Models Built in the UK
    • Philco Cabinet Design & Production
    • Philco Service Organizations
    • Philco Test Equipment
    • Philco Auto Radios
    • Radiobars
    • Sources of Information
  • Models
    • Identification Guide
    • Age Guide
    • Value Guide
    • Set Indices
      • Automotive Set Index
      • Australia Set Index
      • Canada Set Index
      • United States Set Index
  • Documents
  • Service Info
    • Early Philco Schematics
    • Philco 1928-1936 Wiring Diagrams
    • Philco 1937-1938 Wiring Diagrams
    • Philco 1939 RMS Year Book
    • Philco 1940 RMS Year Book
    • Philco 1941 RMS Year Book
    • Philco 1942 RMS Year Book
    • Philco 1946-1947 Home Radio Year Book
    • Philco 1948-1949 Home Radio Year Book
    • Philco 1950 Home Radio Year Book
    • Philco 1951 Home Radio Year Book
    • Philco 1952 Home Radio Year Book
    • Philco 1953 Home Radio Year Book
    • Philco Service Bulletins
    • Philco Serviceman Newsletter
    • Philco UK Service Bulletins
    • Philco Canada Serviceman Newsletter
    • Complete Instructions for Adjusting All Philco Receivers – Vol. 1
    • Complete Instructions for Adjusting All Philco Receivers – Vol. 2
  • Parts
    • Parts Catalogs
    • Audio Transformers
    • Bakelite Block Condensers
    • Carbon Resistors
    • Chokes
    • Compensating Condensers
    • Electrolytic Condensers
    • Fuses
    • Lamps
    • Mica Condensers
    • Output Transformers
    • Paper Condensers
    • Speaker Field Coils
    • Speakers
    • Switches
    • Tone Controls
    • Volume Controls
    • Wire-Wound Resistors
  • Shop Talk
    • Model Notes
      • Correct Intermediate Frequencies for Model 90
      • Error in Model 90 Service Info (1-47)
      • Error in Philco Model 38-690 Tweeter Wiring
      • Evolution of Philco Model 19
      • Evolution of Philco Model 60
      • Evolution of Philco Model 89
      • Extra Coil in Model 19TX Front End
      • Notes on Model 116
      • Notes on Model 21
      • Phonograph Jack in Model 511 Series Philcos
      • Speaker Hookup, Models 14LZX-19LZX-19TX-91RX
      • Speaker Replacement, Model 511 Series
      • The Speaker Problem in early Philco Cathedrals (20-21-70-90)
      • Tuning Condenser Wiring Trouble – Models 20-21-70-90
      • Unusual “No Reception” Problem in Model 90
    • General
      • Bakelite Block Condenser Data
      • Early 30s Philco Wiring Color Codes
      • How to Decipher Philco Resistor Part Numbers
      • Philco Models With Photofinish
      • Should I Plug It In and Turn It On?
      • Suffix Letters in Philco Model Numbers
      • Three-Legged Capacitors in Postwar AM-FM Philcos
      • Tips on Audio Interstage Transformers
      • Why Doesn’t My Philco Have a Back?
    • Syl’s Restoration Topics
      • $1 Fix for Torn Speaker Cones
      • Crystal Cartridge Rebuilding
      • Horseshoe Pickup Rebuilding
      • Restuffing Can Caps
    • Techniques
      • A Fix for Warped Mystery Control Dials
      • Aligning Adapter for Mystery Control Philcos
      • Bakelite Capacitor Rebuild Without Desoldering
      • Band Switch Repair
      • Cleaning Philco Tuning Dials
      • Coil Winding Machine Plans – Counter Added
      • Dial Cord Stringing Diagram, Models 14-17-18-43-71-91-118, others
      • Dial Drive Rebuilding – Models 16, 34, 44, 144
      • Dial Drive Rebuilding – Models 116, 640, 643, 645, 650, 651, 655, 660, 665
      • DIY push button labels
      • Focusing a Philco (newer style) shadowmeter
      • How to “isolate” AC line noise (hash) from your workbench
      • Loctal Socket Problems and their Cure
      • Neutralization of Philco Neutrodyne-Plus Receivers
      • Philco 45-2769 Aligning Adaptor – What is it?
      • Rebuilding the Automatic Tuning Flex Coupling, ’37 and ’38 models
      • Rebuilding Philco Pilot Lamps
      • Re-creating “Dogbone” Resistors
      • Replacing Speaker Wires Without Drilling Rivets
      • Re-Stuffing Caps in Metal Cans
      • Rewinding Philco Coils
      • Rubber-Covered Wiring, 1939-1942 Philcos
      • Shadow Meter Coil Rewind
      • Stuck tuning control, how to unstick???
      • Veneering Tutorial
  • Resources
    • Resources – Alphabetical
    • Resources – Categorized
    • Other Useful Websites
  • PhilcoRadio.com
    • Philco Phorum
    • Philco Gallery
  • Home
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  • Demonstrate Diamond Grid Quality

Philco Documents

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  • Demonstrate Diamond Grid Quality

Demonstrate Diamond Grid Quality

The Philco Retainer, October 1925RR0204 Demonstrate Diamond Grid Quality

From the Ron Ramirez Collection

scanned by Bob Coraor(klondike98)

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Related Articles

  • 1936 Letter to New RMS Members
  • Philco Merchandiser – 1953-11
  • 1936 Official RMS Radio Service Window Sign
  • 1928 Philco Plans for 1927-1928
  • Philco Merchandiser – 1953-12
  • Radio Manufacturer Service Envelope
  • 1936 Philco Dealer Rail Trip-St Louis to Miami
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  • 1929-09-24 – Philco 65 & F-10 Speaker Receipt Envelope
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  • 1930-11 Philco News
  • 1934 Philco Dealer Christmas Card-Binghamton NY
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  • 1947 Philco Service Letter to Service Members
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  • 1946 Philco Distributor Letters Tips for Service Members
  • 1940 Philco Jubiliee RMS Brochure
  • 1937 Profit-Makers for Dealers
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  • Philco Merchandiser – 1948-09
  • 1953 Philco Hi-Hat Club News Fifth Anniversary Issue
  • 1928-1929 Philco Manual of Useful Information
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  • 1938 Philco Tubes-Promotional Material
  • 1937 Philco Headphone Kits
  • Philco Merchandiser – 1948-11
  • 1949 Service Call Reminder Calendar Book
  • Philco Merchandiser – 1948-12
  • Philco Merchandiser – 1949-02
  • Philco Merchandiser – 1949-03
  • Parts Order Blank
  • Philco Merchandiser – 1949-04
  • Philco Merchandiser – 1949-05
  • 1930 Selling At Retail Philco Balanced-Unit Radio
  • Philco Merchandiser – 1949-06
  • 1950 Philco Mid-Summer Convention Booklet
  • 1931 Brilliant Neon Philco Signs
  • Philco Merchandiser – 1949-07
  • 1948 Dealer Agreement
  • Philco Merchandiser – 1949-08
  • PFSS Uniforms for Philco Service Members (2)
  • Philco Merchandiser – 1949-09
  • Philco Merchandiser – 1949-10
  • Philco Merchandiser – 1949-11
  • Philco Merchandiser – 1949-12
  • 1935-04 Philco News
  • 1952 Authorized Philco Service Member Certificate
  • 1929 Confidential Selling Plans
  • 1935-02 Philco News
  • 1934-11 Philco News
  • Philco New Parts Kits
  • 1934 Philco Cruise Scrapbook-E.V. Knowlton
  • 1935-08 Philco News
  • Electric Lighting for Automobiles Carriages Motor-Boats, Etc. ca1920s
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  • 1943 Products To Sell from Your Philco Distributor
  • 1936-05 Philco News
  • Storage Battery Service Postcard
  • 1943 Philco All Year Rounder Vol. 1 No. 7
  • 1934 Philco Retailers Agreement
  • 1955 Wanted-Service Shops
  • 1955 Philco TV Business Builder Promotion
  • 1931 Letter from Philco RE post Philco 90 sale survey
  • 1923-6 The Philco Retainer June 1923
  • 1926 Philco Radio Sales Manual
  • 1955 Philco Service Decal for Store Window
  • PFSS Uniforms for Philco Service Members
  • 1941-09 Letter to RMS Members
  • To All RMS Members – 1940-12-02 Canada
  • To All RMS Members – 1941-02-01 Canada
  • To All RMS Members – 1942-03-02 Canada
  • 1936 Philco Havana Cruise
  • 1935 RMS Letter to New Members
  • 1923 Manual for Selling Radio Storage Batteries
  • To All RMS Members – 1942-06-01 Canada
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  • 1936 Who’s Who Havana-Philco Cruise Info
  • To All RMS Members – 1942-08-01 Canada
  • To All RMS Members – 1942-08-03 Canada
  • Philco Auto Radio Official Directory of Authorized Warranty Labor-July 1936
  • 1938 RMS Member’s Certificate
  • 1946 Philco Canada New Retailer Solicitation
  • 1965 Philco Service Businessman
  • 1950 Authorized Dealer Certificate
  • 1953 Philco Hi-Hat Club News
  • 1950 Mailing Envelope
  • Pre-1936 – Philco Standard Labor Charges
  • 1950 Dealer Agreement
  • 1936 – Philco Standard Labor Charges
  • 1934 Philco Cruise Name Badge-E. V. Knowlton
  • Philco Merchandiser – 1953-05
  • 1951-3 Philco Accessory Merchandiser
  • 1930 Philco Franchise Solicitation Booklet
  • Philco Merchandiser – 1953-07
  • Philco Merchandiser – 1953-08
  • Philco Merchandiser – 1953-09
  • Philco Merchandiser – 1953-10
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Site Updated!

Posted: July 16, 2023

Manuals for several pieces of Philco test equipment added thanks to Dale H. Cook!

  • Philco Model 7070 R-F Signal Generator Manual (1947)
  • Philco Model 7001 Electronic Circuit Master Manual (1947)
  • Philco Model 7019 Junior Scope Manual (1946)
  • Philco Model 7030 Dynamic Tester Manual (1946)
  • Philco Radio Test Equipment Manual (1944)
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