Radio Boulevard
Western Historic Radio Museum


Featuring Full Length Articles on:

Rebuilding Vintage Radio Communication Equipment
Radio Manufacturing History,... Nevada Radio History
Photo Galleries of Vintage Radios
 

Featuring Equipment from:

Wireless Era,... Roaring Twenties,... Classic Thirties
Pre-WWII Ham Gear,... Post-WWII Ham Gear
Vintage Long Wave Receivers,...WWII Communications Equipment
Military-Commercial Radio Gear from 1930-1941 & 1946-1960+
Telegraph Keys,...Vintage Microphones,...Real Machine RTTY


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Latest Additions - New Photos, New Scans and New Written Information (past 90 days, more or less) - Link goes to article where new addition is located


June 23 - New Photos and Update - Fallon, Nevada - LORAN-C Master Station "M" - new photos of Antenna System and update on E-LORAN and current status of the station - LW RCVR Part 4
June 14 - Update - HAL ST-6000 RTTY TU operational, interfacing with Model 28 Compact - Real Machine RTTY
May 24 - New Section in WWII Radio Gear - "WWII Airborne Radio Comms and Air Nav Equipment" - Lots of New Photos, Lots of New Gear including DZ-2 direction finding receiver, ARB receiver, ZB-3 Homing Adapter, RU-16 rcvr & GF-11 xmtr, DW-1 amplified loop antenna, SCR-578 "Gibson Girl", AN/CRT-3 "Gibson Girl", Pre-WWII Air Navigation and DFing, AirNav charts, AirNav Computers and more - USAAF Airborne Gear - BC-348, ART-13, BC-375, ARR-5, ARR-7 and more (30+ new photos) - WWII Airborne Radio Gear Part 2  
May 11 - New Write-up and Photo - HAL ST-6000 RTTY TU - Real Machine RTTY
May 10 - New Write-up and Photo - Radiomarine Corp. AR-8711 Direction Finder - Mil-Comm Gear Part 1
Apr 12 - New Info and Photo - National HRO-60 - Swedish Royal Board of Telecommunications radio monitoring and point-to-point communication stations, interesting info on HRO-60 use - HRO Part 1


Website Navigation Index

Click on Title - goes to single-part articles or goes to Part 1 of multipart articles.  Or,... Click on a Specific Part Number of multipart articles
 

Full Length Articles on Wireless Era Equipment


M.H. Dodd's 1912 Wireless "Spark" Station

Details the discovery of Dodd's Spark Station inside a steamer trunk in Reno, Nevada in November 1999. Details on Dodd's equipment, the station's location, how it worked and where it is now. Lots of photographs including original vintage B&W photos of Dodd using his station in 1912, photos of Dodd's 1909 Award-winning Station, other vintage Dodd photographs plus contemporary photos of the Dodd station as it was set up on display in the Western Historic Radio Museum. Appendix includes write-up of Dodd's 1923 homebrew 3-tube Cockaday Receiver.
 


Colin B. Kennedy - "Radio Apparatus of Quality"

Comprehensive history of the design and manufacturing of Kennedy's 1922 line of high-quality receivers. Details on the Type 110 Universal, the Type 220 Intermediate Wave and the Type 281 Short Wave. Also covers the Type 525 and Type 521 Audio Amplifiers. Restoration information and write-up of a Type 220 restoration. Performance testing the Type 110 and performance testing the Type 220. Also includes a write-up of our experiment duplicating Dr. Royal Rife's use of the Kennedy receivers in his laboratory. Lots of photos.
 


A. H. GREBE & CO., INC. - "A Guide to the Grebe Synchrophase MU-1"

Part One - Detailed history of the design and manufacturing of the Grebe MU-1, MU-2 and other variants, Dr. Mu QSL cards, Color Advertising Brochure

Part Two - Engineering Upgrades, Serial letter dilemma, Restoration hints, How to neutralize the MU-1, Performance testing Early model CTPB and Late Model RJNA. Lots of photos.
 


SE-1420, IP-501 & IP-501-A - "The Classic Shipboard Wireless Receivers"

Comprehensive history of the design and manufacturing of these classic shipboard receivers. Detailed restoration write-ups. Performance testing the SE-1420B and the IP-501-A. How to set "Critical Coupling" and attain real DX performance. NDB Station Log for the IP-501-A. Lots of photos.
 
 

Vintage Long Wave Receivers


Vintage Long Wave Receivers - Testing and Performance Evaluations

Detailed history write-ups and performance evaluations on several different models of pre-WWII, WWII and post-WWII LW receivers with examples from the US Navy, US Army Signal Corps, Radiomarine Corp., Mackay Radio and Telegraph Co., Hammarlund Mfg. Co., Collins Radio Co. and National Company. Includes info on using vintage LW gear on 630 meters. Lots of information and lots of photos.

Part One -  Radiomarine IP-501-A, Mackay Radio Type 105A, National Company RIO, USN RAA-3, USN RAG-1, Hammarlund SP-100LX, USN RAZ-1, USN RAK-7 & RAL-7,

Part Two -  USN RBL-5, Signal Corps BC-344-D, Radiomarine Corp. AR-8510, USN RBA-1 (with rebuild info and reception log,) RBA-6, Mackay Radio Type RC-123 & Type 3001A,

Part Three - Collins R-389/URR (with rebuild info,)  Hammarlund SP-600VLF-31 (with performance details,)  RACAL RA-17 with RA-237-B L.F. Converter (performance details and reception log,) Using Selective Level Meters as Long Wave Receivers, Other Communication Receivers with some Long Wave Coverage

Part Four - What to listen to below 500kc, USN VLF Stations, SAQ 17.2kc, 630M amateur operation. 2007 Photo-tour of Loran-C "Master" Station in Fallon, Nevada. NDB stations in Nevada. Complete NDB reception log.
 
 

Full Length Articles on Radio Communication & Amateur Radio Equipment


National Company, Inc. - HRO Receiver - "The Cream of the Crop"

Comprehensive history of the design and manufacturing of the HRO. Serial number log for determining build date of your HRO. Several restoration write-ups. Lots of photos and information.

Part One  - History of the development of the HRO receiver, detailed descriptions on pre-WWII HRO Models, WWII HRO Models, post-WWII HRO Models

Part Two  - Serial Number Analysis and Log, Current Owners of D & E run HROs, Chronologically listed Engineering Upgrades, HRO Accessories - Power Supplies, Speakers, Coil Boxes

Part Three  - Guild to Restoring HRO Receivers, Gear Box, PW-D Dial, Coil Set Details, Restoration Articles on 1935 HRO SN H-103, 1940 HRO Senior SN 463-K

Part Four  - Restoration articles on 1935 HRO SN E-50, 1935 HRO SN F-16, 1946 HRO-5C SN 184 0009, Collector's Gallery of HRO Photos, Performance Improvement Suggestions, Conclusion
 


National Company, Inc. - NC-100 Series - "Moving Coil" Receivers

Comprehensive history of the design and manufacturing. Details on most of the sixty+ different types of Moving Coil receivers. Includes details on the Airport Receivers, the WWII versions and the post-WWII versions. Serial Number Analysis and Log. Several detailed restoration write-ups. Serial number analysis and log. Lots of photos and lots of information.

Part One - Design History, profiles on NC-100 (1936) to NC-2-40D (1947) Receivers, Airport Receivers (1937 through 1948), WWII Receivers USN RAO Series, RBH Series, Signal Corps NC-100ASD, USCG R-116

Part Two - Serial Number Analysis & Log, Chronologically Listed Engineering Changes, Catacomb Coils Details, PW Gearbox, PW-Dial info, S-Meter, Speakers

Part Three - Restoration Write-ups: NC-200 Silver Anniversary, NC-100XA, US Army NC-100ASD

Part Four - Restoration Write-ups: Airport Receiver RCE, NC-101X, NC-80X
 


Hallicrafters SX-28 - "A Pre-war Masterpiece"

Comprehensive history of design and manufacturing. Includes the SX-28A, AN/GRR-2, R-45/ARR-7 and other receivers. Serial number analysis and log allows dating your SX-28. Restoration information. Performance comparisons. Lots of photos.

Part One -  History of the design, the SX-28, SX-28A, AN/GRR-2, R-45/ARR-7, R-12 Speaker, PM-23 Speaker, Estimated Production Quantities, Serial Number Log

Part Two -  Engineering Changes Chronologically Listed, Variations of the SX-28 receiver, Restoration suggestions, White Dial Myth, Performance comparisons, Using the SX-28 today
 


Hallicrafters DD-1 "Skyrider Diversity"

Detailed history of design and manufacturing. Profile of XE1G ham station and the first amateur diversity receiver. DD-1 prototype information. Serial number analysis. List of current owners of known DD-1 receivers. Restoration information. Performance details. Lots of photos.

Part One - Detailed history of the DD-1 development, XE1G diversity receiver (inspiration for the DD-1,) Prototype DD-1, Production DD-1

Part Two - Restoration of the DD-1, Serial Number Log, Collector's Gallery of DD-1 photos
 


Navy Department-RCA  -  RAA-3 - Shipboard Long Wave Superheterodyne Receiver from 1935

Comprehensive history of the U.S. Navy's first superheterodyne long wave receiver. Includes a comprehensive history of the origins of RCA and their relationship with the US Navy. Also, origins of Radiomarine Corp, RCA Manufacturing Company, Inc and RCA-Victor. Continuing Restoration of RAA-3 SN: 64 - a journal-type write-up of the "ground-up" restoration of this behemoth of a Navy receiver. Weighing 465 pounds and comprising three individual sections, this ultra-rare receiver was stored outside, wrapped in a tarp. A real restoration challenge. Lots of photos.
 


RCA's Amazing AR-88 Receivers

Comprehensive history of the AR-88 family of receivers with circuit details and variations in construction. Includes details on AR-88D, AR-88LF, AR-88F, CR-91, CR-91A, CR88, CR88A, CR-88B, including triple diversity receivers RDM, DR-89, OA-58. Sweep Alignments, Restoration Hints, Serial Number Analysis. Collector Photo Gallery. Lots of photos and lots of information.

Part One -  Comprehensive History of design and manufacturing, Russian hams using the AR-88, General information on the various models

Part Two -  Triple Diversity Models, Serial Number Analysis, Restoration Suggestions 

Part Three -  Sweep Alignment of the IF (includes photos of the actual 'scope patterns using modern equipment,) RF Tracking alignment, Restoration of a typical AR-88D

Part Four -  Collector Gallery of AR-88 photos, Diversity Operation, Performance Comparisons, Remote Standby non-invasive mod 
 


RCA's Legendary AR-60 Receivers

Comprehensive history of the AR-60 receivers, includes all RCA versions and the U.S. Coast Guard CGR-32 versions. Circuit details, alignment, adjustments, critical analysis of the infamous 1936 "R-9" magazine review of the AR-60, Serial Number Analysis. Collector Photo Gallery. Lots of photos.
 


Hammarlund Mfg. Co., Inc - The Incredible "Super-Pro" Receivers (1935 to 1948)

Comprehensive history of the Super Pro receivers from 1935 to 1948. Includes SP-10, SP-100, SP-200, SP-400, BC-779, BC-794, BC-1004, SPA, R-270 Wickes Eng. version and other military versions. Includes special appendices on the Comet Pro receiver and HQ-120X/RBG receivers. Restoration details on SP-10, SP-100 and SP-400 receivers. Collector Photo Gallery. Lots of photos and lots of information.

Part One -  History of the Pre-WWII Super Pro, details on SP-10, SP-100 Series, SP-150, SP-200 Series, Military Versions, SP-400 Series, Power Supplies, Power Cable, Serial Number Analysis and Serial Number Log

Part Two -  Chronological Listing of Engineering Changes, Restoration hints, History of the Louis Geisler Modifications (1947 to 1950s,) Restoration of SP-10 from WMI, Restoration of SP-100X

Part Three -  Restoration of SP-100LX, Rebuilding the SP-400-SX, Collector Gallery Photos, Appendices on the Comet Pro and HQ-120X/RBG

 

Collins Radio Company - 32V Series of Medium Power Amateur Transmitters (1946 to 1954)

Comprehensive look at the entire series of 32V transmitters. Includes 32V-1, 32V-2 and 32V-3 plus descriptions of early and late production variations. Operational idiosyncrasies and mechanical complexities. 32V-2 Pi-L network problems and solutions. Is the 32V-3 the best of the lot? Details on how to remove the 32V series front panels (it's more complicated than you'd think,) rebuilding the MC slide rule dial assembly with lots of photos. Restoration write-ups on the 32V-1, 32V-2 and the 32V-3. Lots of photos and information.
 

Collins Radio Company - 51J Series of Communications Receivers

Detailed look at all of the different receivers that comprise the 51J Series, including the 51J-1, 51J-2, 51J-3, 51J-4 and the R-388/URR. Production history, variations, circuit changes, alignments and more. Detailed rebuilding information on the 51J-2 and R-388. 70E-15 PTO suggestions and link to Bill Orr's 1969 CQ article on the R-388 PTO. Lots of photos and information.
 


Patterson Radio Company - PR-10 Receiver & PR-10 Preselector

Comprehensive history of Patterson Radio Company and 1930s Los Angeles radio manufacturing. Detailed circuit analysis, red-lined corrected schematic, frequency calibration chart (so you know where your PR-10 is tuned.) Restoration details on Velvet Tuning rebuild and more. Collector Photo Gallery. Lots of photos and information.
 


Signal Corps-Hallicrafters - R-274 "Super Pro" Receiver

Comprehensive history of Hallicrafters' Super Pro, the R-274 receiver, circuit description, performance analysis, detailed comparison between the R-274 and the Hammarlund SP-600, pros and cons of each receiver. You can VOTE for your favorite "Super Pro" - either Hallicrafters' or Hammarlund's. Voting results are shown (you might be surprised at the results.) Lots of photos and information.
 
RACAL - RA-17, RA-117 - British High-Performance Receivers

Comprehensive history of RACAL Engineering Ltd (and the various other names the company was known by.) The RA-17 and the Wadley Loop, RA-17 versions (over 40 different versions,) the RA-117 design, RA-117 versions (a lot of them,) the RA-6117 (made in the USA,) the RA-6217 RACAL's first Solid-State receiver. Adding remote standby to the RA-6117, How to set correct power transformer primary voltage, Receiver performance. RA-237-B Low Frequency Converter set up and operation with the RA-17C-12 receiver. Performance and NDB reception log. Lots of photos (Ray Brown, Jock Cunningham, Dr. Trevor Wadley, Ernest Harrison) and lots of information.
Navy Dept-Bureau of Engineering/Hygrade Sylvania - RAG-1  Serial Number 1 - TRF w/ Tracking BFO Long Wave Receiver

Comprehensive history of the US Navy's first TRF with Tracking BFO Long Wave Receiver from 1933. History of the Hygrade Sylvania Corporation. This article is in a journal format that documents the restoration process of this very rare receiver. Challenges included a severely damaged chassis and a major bend of the front panel. Equally challenging was the total lack of documentation, no schematic, no manual. Lots of photos show how the project progressed from a non-functional derelict into a fully operational LW receiver. Reception Test Logs. Comparison of the RAG versus the RAK receiver.
Navy Dept-Bureau of Ships/National Co., Inc./Wells Gardner & Co. - RAO Series of WWII Radio Receiving Equipment

Comprehensive history of how the famous U.S. Navy RAO receiver that was built by National Company Inc. and by Wells Gardner & Co. developed from National's "Moving Coil" receivers - better known as "coil catacomb" receivers. Detailed information on each version of the RAO receivers, information on the RAO accessories including details on the USN RCX panoramic adaptor used with the RAO-7. Excruciating OCD details on two RAO restorations, Wells Gardner & Co. RAO-3 and National Company, Inc. RAO-7. Lots of photos and lots of information.  
 

Full-Length Articles on Rebuilding Vintage Radio Communication Equipment


Rebuilding the R-390A/URR Receivers

Part One - History of the R-390 and R-390A, description of each module and basic rebuilding information, Main Frame, RF Deck, IF Deck, AF Module, PS Module, PTO, Lots of photos

Part Two - Front panel restoration, Contractor list by year, Alignment Suggestions, Performance expectations

Part Three - Miscellaneous Information, Restoration - detailed restoration profiles of several R-390A receivers, (2) 1967 EAC versions, Arvin R-725 version, Diversity R-390As

Part Four - Restoration of other receivers in the R-390A family, includes R-648 (Airborne R-390A,) R-389 (Low Frequency version,) R-392 (GRC-19 Rcvr) plus LS-206, Security Dial Cover, CV-979 cabinet
 

Rebuilding the ART-13 Transmitter

Part One - History of the ATC and ART-13, Accessories, Testing Prospective Purchases, Powering the ART-13 with a Dynamotor, PP-1104-C High Current Power Supply details

Part Two - Powering the ART-13 with a homebrew AC Power Supply, Three AC Power Supply Plans with Schematics, Updates to AC power supplies, Mechanical Servicing of the Autotune

Part Three - Restoration profile of the USAAF ART-13A Basket Case, Restoration profile of the USN Collins ART-13 "typical restoration," Restoration of the $10 (Wasp's Nest) ART-13A

Part Four - Refurbishing a Collins ATC that SAAMA MWO'd into ART-13, Operating the ART-13 on the air, Operating on 630 Meters, Details on the CU-32 Low Frequency Loading Coil (tuner), Lots and lots of photos
 

Rebuilding the Hammarlund SP-600 Receivers

Part One -  History of the design, Overview of the task, Rebuilding the RF Platform, Replacing Capacitors in IF, Xtal Osc, Conversion Osc, Chassis, Lots of photos

Part Two -  Miscellaneous Electronic Work, Rebuilding the Carrier Level/Audio Level Meter

Part Three - Cosmetic Restoration, Panel, Cabinet, Alignment, Expected Performance, Collector Gallery Photos
 

Rebuilding the BC-348 Series of Receivers

Part One -  Rebuilding and Retrofitting the DM-28 Dynamotor into the Single Ended Tube Versions of the BC-348 (Q, N or J only,) with schematics

Part Two -  Rebuilding and Retrofitting the DM-28 Dynamotor into the Grid Cap Versions of the BC-348 (all other versions,) Retrofitting the DM-24 into the BC-224 versions, with schematics

Part Three -  Performance Expectations for Single Ended and Grid Cap Versions, AC power supply Enhancement with designs and schematics, Wrinkle Finish painting, Duplicating Inspection Stamps
 

Rebuilding the AN/GRC-19 Mobile Transmitter-Receiver

History of the design, overview of the T-195, testing and repairing the T-195, lots of photos and information, Testing and repairing the R-392 receiver, GRC-19 Operation suggestions
 

Rebuilding the T-368 Military Transmitter

Part One -  History of the design, circuit description, testing and repair of the three decks, testing and repair of cabinet harness

Part Two -  Powering Up the T-3, Operating the T-3, profile on the BC-939 Antenna Tuner, profile on the SWR Bridge/Watt Meter, Lots of photos
 


Successfully Operating the BC-375 on the Ham Bands Today

Detailed information on how to power the BC-375 to avoid problems that include "FMing," non-symmetrical modulation, low power output and more. How to perform "dynamic neutralization" to eliminate audio distortion due to parasitic oscillations. Interfacing the BC-375 with the BC-348 receiver. Operating the BC-375 on 630 meters CW. Includes set-up data.
 
 

Nevada Radio History


Nevada's Early Radio History 1901 to 1940

Arthur Raycraft, Nevada's "Father of Wireless," Raycraft's stations in Tonopah and Manhattan, Nevada (1911,) photo of Raycraft raising his antenna in Tonopah (ca: 1920)
Early Nevada Hams, "The Great Radio Tour" - 1922 - Lincoln Highway Detroit to San Francisco and finishing in Los Angeles with three day stopover in Austin, Nevada - Lots of photos
History of Nevada Radio Broadcasting Stations pre-1940, includes KOJ, KDZK, KFAS, KFFR, KOH and KGIX, photos of the KOH antennas from July 1940
 
 

Radio Telegraphy, Real Machine RTTY and Vintage Mikes - Photo Galleries


Telegraph Keys 

Part One - Hand Keys, includes Spark Keys, Boston Keys, Early Radio Keys, Leg Keys, Flame-proof Keys, Recently Made Keys, "British-style" Morse, Land Line Telegraph Equipment, Sounders, Keys, Relays, KOBs

Part Two - Semi-Automatic Keys or Bugs, History of Vibroplex showing many early models, Mecograph, ATOZ, J-36 versions, Speed-X Radio Mfg, Speed-X Mfg, Speed-X E.F. Johnson, McElroy Mfg, Buzza, Kenco, Speed Bug, Dow-Key, 73 Bug and more - Learning Tools, records, oscillators, Instructographs

Real Machine RTTY

Teletype Corporation Machines - Model 19ASR, Model 28KSR Compact, Model 15KSR, Model 28KSR, WA7YBS RTTY Station, Lots of Terminal Units both Military and Civilian, ITTY - Internet teletype, WA7YBS homebrew TU updates


Vintage Microphones - Broadcast Mikes - RCA, Western Electric - General Purpose Mikes - Shure Bros, Astatic, Turner, American, Carbon Mikes - Detailed Manufacturer History and Engineering-Construction 
 
 

Radio Equipment from 1909 up to 1960+ - Photo Galleries

Commercial and Amateur Wireless Apparatus 1909 up to 1921 - Dodd's Wireless Stations, Murdock, Signal, Klitzen, Kennedy, Radiomarine Corp and more
 

Broadcast Entertainment Radios 1922 up to 1940 - Compiled and Edited from WHRM's "Roaring 20s Radios," "Classic 30s Radios" and "Console Floor Model Radios" - RCA Radiola, Atwater-Kent, Crosley, Grebe, Federal, FADA, Infra+Dyne, Zenith, Philco, Pre-war Plastic, Crystal Sets, Victor Talking Machine Company, Scott Radio Laboratories, McMurdo Silver,...lots of photos and lots of information.
 

Pre-War Ham Gear 1928 up to 1941

Part One - 1928 to 1935, includes Pilot Radio, National Co, RME, Hammarlund, Patterson, Breting, RCA, Hallicrafters, Tobe Deutschmann and more

Part Two  - 1936 to 1941, includes Hallicrafters, RME, National, Hammarlund, Patterson, Breting, Meissner and more
 

Post-War Ham Gear 1946 up to 1960+ - National Co, Hallicrafters, Collins, Johnson Viking Desk KW, Johnson "Navigator Deluxe," Eldico, Homebrews including the W6MIT "1625 Rig"
 

WWII Radio Communication Equipment

Part One - WWII US Navy Equipment, includes RAZ-1, RAK&RAL, RBA, RBB, RBC, RBG, RBH, RCD, RCH and more, US Navy Shipboard and Shore Entertainment Receivers

Part Two - WWII US Navy and USAAF Airborne Radio Comms and Air Nav Gear - includes DZ-2, RU-16, ARB, ZB-3, Gibson Girls, BC-224, BC-348, BC-375, ART-13, BC1206, ARR-5, ARR-7, lots of info on Pre-WWII Air Navigation

Part Three -  WWII Radiomarine Corp WWII gear, US Coast Guard gear, US Army Signal Corps, WWII Radio Test Gear

Part Four - WWII Ally Radio Communications Equipment - Marconi/RAF R1155 Receiver, Kingsley Radio Co. AR7 "HRO knock-off," Marconi/RN C.R. 300/1 Navy Receiver, Canadian Marconi Co. CSR-5 RCN Receiver

 
Military & Commercial Communication Equipment 1930 to 1941 & 1946 to 1960s

Includes Airport and Airways Receivers, Shipboard Receivers, General Purpose Receivers, Pre-WWII and Post-WWII Military Radio Equipment

Part One - 1930 to 1958 - National Co Airport Rcvrs RHM, AGS, RIO, RHQ, RCA AVR-11A, Mackay Radio 105A & 101A, USN RAG-1, USN RAA-3, USCG-RCA CGR-32 (AR-60,) RCA AR-88 family, Radiomarine AR-8506-B, AR-8510, AR-8516, AR-8711, Hammarlund SP-100LX

Part Two - 1949 to 1960s - Collins 51J Series, R-388, R-390, R-390A, R-389, R-648, R-725, Hammarlund SP-600 Series, Signal Corps-Hallicrafters R-274, TMC GPR-90RXD, National NC-400, RACAL RA-17, Nems-Clarke VHF Receivers, Zenith Morale Radios R-520 & R520A, PRD-1 Direction Finding Set, GRC-19 Transmitter-Receiver, T-368 Transmitter

Header Artwork: from "Magic Dials" 1939 by Lowell Thomas

 

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 Radio Boulevard
 Western Historic Radio Museum

 Vintage Radio Communication Equipment Rebuilding & Restoration Articles,

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1909 - 1969

 - 60 years of Radio Technology -

 

 

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