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TECHNICAL DATA PAGE

Tube Radio Data

Swan transceiver 7360, 6JH8 balanced modulator tubes

All early Swan transceiver models (e.g. 140, 350, 500C) used the 7360 tube for the balanced modulator however beginning in 1968 it was replaced by the 6JH8. The 250C, 350C, 500CX (and the last 25 of the 500C's) and all subsequent models used the 6JH8 tube. At that time the 6JH8 sold for about 1/5 th the cost of the 7360 so Swan saw not only a cost saving and easier availability but also found the 6JH8 worked better - however some users feel that the audio quality from transceiver models using the 7360 is somewhat superior to those using the 6JH8 tube.

The 6JH8 can be retrofitted into any transceiver employing the 7360 tube. There are no circuit changes other than the tube socket pin wiring (see chart below) all other components remain the same. This requires all pins except the two filament pins rewired.

7360 FUNCTION 6JH8
PIN 1 CATHODE PIN 7
PIN 2 SCREEN GRID PIN 3
PIN 3 CONTROL GRID PIN 6
PIN 4 FILAMENT PIN 4
PIN 5 FILAMENT PIN 5
PIN 6 PLATE #1 PIN 8
PIN 7 PLATE #2 PIN 9
PIN 8 DEFLECTOR #1 PIN 2
PIN 9 DEFLECTOR #2 PIN 1

The balanced modulator tube should have a metal shield installed to prevent interaction with stray magnetic fields within the cabinet.

Special thanks to Robert Balonis, NB3W and the Swan Tube Transceiver Compendium

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1L6 Substitute

The simplest solution is to replace the 1L6 with a 1R5 but first carefully cut off pin 5 of the 1R5 very close to the glass. Click for PictureClick for a pic!

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Open I.F. Transformers

If you can't find a replacement I.F. transformer for your early AM tube radio here is a simple method of changing the I.F. transformer circuit to impedance coupling with a 2.5 mh RF choke (Hammond 1503) and a 75 to 100 pf mica capacitor.

The modified circuit will not perform as well as the original so take care to align the I.F. precisely.

Open IF Transformer Picture

Tube Radio Data

PLUG-IN BALLAST RESISTOR DATA - 1943 (.5 MB PDF) 

1937 AMPERITE REGULATOR/BALLAST BULLETIN AD-72 (.2 MB PDF) 

RADIO PILOT LAMP DATA - 1943 (.5 MB PDF) 

SCHEMATIC SYMBOLS USED IN RADIO DIAGRAMS - 1943 (.4 MB PDF) 

NEW   SCHEMATIC SYMBOLS USED IN RADIO DIAGRAMS - 1928 (.8 MB PDF) 

RESISTOR & MICA CAPACITOR COLOR CODES - 1943 (.4 MB PDF) 

RESISTOR COLOR CODES - 1973 (.3 MB PDF) 

CAPACITOR COLOR CODES - 1973 (.8 MB PDF) 

ELECTRONIC SYMBOLS & ABBREVIATIONS - 1973 (.4 MB PDF) 

GAS-FILED LAMP DATA - 1973 (.4 MB PDF) 

RMA (EIA) WIRING COLOR CODES - 1943 (1.0 MB PDF) 

GRID BIAS CELL DATA - MALLORY 1953 (.6 MB PDF) 

CANADIAN RCC RADIO SERVICE MANUAL SUPPLEMENT FORMAT DATA (.8 MB PDF) 

CENTRALAB PEC COUPLATE DATA (1.4 MB PDF) 

CENTRALAB PEC COUPLATE CROSS REFERENCE (1.9 MB PDF) 

RADIO MODEL CROSS INDEX - RCA - GE - WESTINGHOUSE - GRAYBAR (.62 MB PDF) 

1935 RADIO TRADE NAME TO MANUFACTURER CHART (4.8 MB PDF) 

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Miscellaneous Vacuum Tube Data

EIA - VACUUM TUBE MANUFACTURER EIA CODES (.24 MB PDF) 

BURROUGHS 6700 (BD301 - BD311) BEAM SWITCH TUBE BASING DIAGRAM 

ROGERS TUBE CHARACTERISTICS CHART (1 MB) 

ROGERS 6H7M & 6H7S TUBE SUBSTITUTION DATA (.35 MB) 

CRT PHOSPHOR CHARACTERISTICS 

VACUUM TUBE FORMULAS AND SYMBOLS 

1959 GENERAL ELECTRIC INTRODUCTION OF 6L6GC TUBE 

1954 GC-10D COUNTING TUBE INTRODUCTION 

1950 TUNG-SOL INTRODUCTION OF 5881 TUBE AD 

1945 AMPEREX TRANSMITTING TUBES AD 

1945 GE LIGHTHOUSE TUBE AD 

1938 RCA TRANSMITTING TUBES AD 

1936 RCA VICTOR MAGIC EYE TUBE AD 

1931 DE FOREST TYPE 507 10,000 WATT AUDION AD 

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Tube Socket Data

EIA - TUBE SOCKET MANUFACTURER EIA CODES 

AMPHENOL TUBE SOCKET DATA PAGE 1 

AMPHENOL TUBE SOCKET DATA PAGE 2 

CINCH JONES TUBE SOCKET DATA PAGE 1 

CINCH JONES TUBE SOCKET DATA PAGE 2 

CINCH JONES TUBE SOCKET DATA PAGE 3 

EBY TUBE SOCKET DATA PAGE 1 

EBY TUBE SOCKET DATA PAGE 2 

EBY TUBE SOCKET DATA PAGE 3 

EBY TUBE SOCKET DATA PAGE 4 

EBY TUBE SOCKET DATA PAGE 5 

EBY TUBE SOCKET DATA PAGE 6 

E. F. JOHNSON TUBE SOCKET DATA PAGE 1 

E. F. JOHNSON TUBE SOCKET DATA PAGE 2 

E. F. JOHNSON TUBE SOCKET DATA PAGE 3 

EIMAC SK SERIES TUBE SOCKET DATA PAGE 1 

EIMAC SK SERIES TUBE SOCKET DATA PAGE 2 

EIMAC SK SERIES TUBE SOCKET DATA ACCESSORIES 

EIMAC SK SERIES TUBE SOCKET DATA FINGER STOCK 

EIMAC SK-600 & SK-610 TUBE SOCKET DATA PAGE 1 

EIMAC SK-600 & SK-610 TUBE SOCKET DATA PAGE 2 

EIMAC AIR SYSTEM SOCKET & CHIMNEY TO TUBE TYPE LIST 

EIMAC HR SERIES HEAT DISSIPATING CONNECTOR CHART 

JAMES MILLEN TUBE SOCKET DATA 

NATIONAL NIXIE TUBE & SOCKET DATA 

NATIONAL TUBE SOCKET DATA 

POMONA ADAPTERS AND SOCKETS 

VECTOR SOCKET TURRET DATA 

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Tube Box Photo Section

Canadian Tube Box Photos

ADDISON TUBE BOX (ADDISON T.V. PARTS LTD.) 

ADMIRAL TUBE BOXES (CANADIAN ADMIRAL CORP.) 

CELEBRITY TUBE BOX (CANADIAN GENERAL ELECTRIC) 

CESCO TUBE BOX (CANADIAN ELECTRICAL SUPPLY CO.) 

CITATION TUBE BOX (KELDON ELECTRONICS LTD. CANADA) 

CONTINENTAL TUBE BOX (WESTINGHOUSE CANADA) 

CORVETTE TUBE BOX (MARSHALL WELLS OF CANADA) 

DURBAR TUBE BOX (NIAGARA FALLS ONTARIO) 

ENSIGN TUBE BOX (CANADIAN ADMIRAL CORP.) 

FLEETWOOD TUBE BOXES (ELECTRICAL PRODUCTS MFG. CO. CANADA) 

GAURDIAN TUBE BOX (GAURDIAN ELECTRONICS LTD. CANADA) 

GENERAL ELECTRIC CANADA TUBE BOXES 

GENERAL ELECTRIC EARLY TUBE BOX 

GENERAL ELECTRIC EARLY UX TUBE BOX 

GLOTRON TUBE BOX (GLOTRON OF CANADA) 

MAPLE LEAF TUBE BOX (MAPLE LEAF TUBE COMPANY CANADA) 

MARCONI CANADA TUBE BOXES 

MYERS "HI-MU" TUBE BOX 

MYERS "UNIVERSAL" TUBE BOX 

NORTHERN ELECTRIC TUBE BOXES 

NORTHERN ELECTRIC EARLY NOR-PHONIC TUBE BOX 

NORTHERN ELECTRIC PEANUT TUBE BOX 

PHILCO TUBE BOX (PHILCO CORP. OF CANADA LTD.) 

PHILIPS TUBE BOX (PHILIPS ELECTRONICS INDUSTRIES LTD.) 

REGENCY TUBE BOX 

ROGERS - ROGERS MAJESTIC TUBE BOXES 

1930'S ROGERS A/C TUBE BOX 

1930'S TED ROGERS PHOTOGRAPH ROGERS A/C TUBE BOX 

RVC - THE RADIO VALVE CO. OF CANADA TUBE BOX 

SELECTRON TUBE BOXES (ELECTROHOME CANADA) 

SIEMENS TUBE BOX (SIEMENS CANADA LTD.) 

SILVERTONE TUBE BOX (SIMPSONS SEARS LTD. CANADA) 

STC TUBE BOX (SCIENTIFIC TUBE CORP. CANADA) 

SUPERIOR TUBE BOX (SUPERIOR ELECTRONICS INDUSTRIES CANADA) 

SYLVANIA TUBE BOXES (SYLVANIA CANADA LTD.) 

SYLVANIA INTERNATIONAL TUBE BOXES (SYLVANIA CANADA LTD.) 

TAT TUBE BOX (TELEVISION ACCESSORIES & TUBES LTD.) 

TRI-PLEX TUBE BOX (AMERICAN GENERAL SUPPLY CANADA) 

VIKING TUBE BOXES (EATON'S OF CANADA) 

WE TUBE BOX (WESTERN ELECTRONICS CANADA) 

WESTINGHOUSE TUBE BOXES 

WESTINGHOUSE TUBE BOXES - EARLY 

WESTINGHOUSE TUBE BOX - EARLY UX 

WOODWARD'S TUBE BOX (WOODWARD STORES CANADA) 

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Worldwide Tube Box Photo Section

October feature tube box photo

BRIMAR - ENGLAND

Brimar Tube Box 
click pic for full size image

past months feature tube box photos

2008
OCTOBER - RCA WORLD MAP TUBE BOX - USA 
NOVEMBER - LUXOR RADIO TUBE BOXES - SWEDEN 
DECEMBER - GENALEX TUBE BOX - ENGLAND 
2009
JANUARY - NEOTRON TUBE BOXES - FRANCE 
FEBRUARY - SIEMENS TUBE BOXES - GERMANY 
MARCH - AWV TUBE BOX - AUSTRALIA 
APRIL - HIT RAY TUBE BOXES - JAPAN 
MAY - TRIOTRON TUBE BOXES - AUSTRIA 
JUNE/JULY - TUNGSRAM TUBE BOXES - HUNGARY 
AUGUST - FIVRE TUBE BOX - ITALY 
SEPTEMBER - PHILIPS TUBE BOXES - HOLLAND 
OCTOBER - JJ TUBE BOX - SLOVAK REPUBLIC 
NOVEMBER - GENDIS TUBE BOX - JAPAN 
DECEMBER - MULLARD TUBE BOXES - ENGLAND 
2010
JANUARY - GRAMMONT TUBE BOX - FRANCE 
FEBRUARY - TRIAD TUBE BOX - USA 
MARCH - BRADFORD TUBE BOX - USA 
APRIL - EARLY RCA NUVISTOR TUBE BOX - USA 
MAY - PUROTRON TUBE BOX - USA 
JUNE/JULY - UNIVERSAL TUBE BOX - USA 
AUGUST - EARLY NATIONAL UNION TUBE BOX - USA 
SEPTEMBER - SONATRON TUBE BOX - USA 
OCTOBER - CROSLEY TUBE BOX - USA 
NOVEMBER - DAVEN TUBE BOX - USA 
DECEMBER - EARLY KEN-RAD TUBE BOX - USA 
2011
JANUARY - STAR TUBE BOX - USA 
FEBRUARY - CUNNINGHAM TUBE BOX - USA 
MARCH - RAYTHEON TYPE B TUBE BOX - USA 
APRIL - EARLY ZENITH TUBE BOX - USA 
MAY - EARLY SILVERTONE TUBE BOX - USA 
JUNE/JULY - KEN-RAD LATER TUBE BOX - USA 
AUGUST - EMERSON TUBE BOX - USA 
SEPTEMBER - PHILCO STAR LIGHT TUBE BOX - USA 
OCTOBER - CHIEF TUBE BOX - USA 
NOVEMBER - ADMIRAL TUBE BOX - USA 
DECEMBER - PHILCO-FORD TUBE BOX - USA 
2012
JANUARY - RAD-TEL TUBE BOX - USA 
FEBRUARY - MOTOROLA TUBE BOX - USA 
MARCH - GM-DELCO TUBE BOX - USA 
APRIL - AMPEREX TUBE BOX - USA 
MAY - TUNG-SOL TUBE BOX - USA 
JUNE/JULY - LAFAYETTE TUBE BOX - USA 
AUGUST - WESTINGHOUSE TUBE BOX - USA 
SEPTEMBER - HYTRON TUBE BOX - USA 
OCTOBER - MONTGOMERY WARD AIRLINE TUBE BOX - USA 
NOVEMBER - WOLCOD TUBE BOX - USA 
DECEMBER - RAULAND TUBE BOX - USA 
2013
JANUARY - VICTOREEN TUBE BOX - USA 
FEBRUARY - RAYTHEON TUBE BOX - USA 
MARCH - BARBER-COLMAN TUBE BOX - USA 
APRIL - ALRAD TUBE BOX - USA 
MAY - KALOTRON TUBE BOX - USA 
JUNE/JULY - HEINTZ AND KAUFMAN TUBE BOX - USA 
AUGUST - EL MENCO TUBE BOX - USA 
SEPTEMBER - SHELDON TUBE BOX - USA 
OCTOBER - EDISON TUBE BOX - USA 
NOVEMBER - BOMAC TUBE BOX - USA 
DECEMBER - SYLVANIA "GOLD BRAND" TUBE BOX - USA 
2014
JANUARY - SONOTONE TUBE BOX - USA 
FEBRUARY - CORONADO TUBE BOX - USA 
MARCH - NATIONAL UNION TUBE BOX - USA 
APRIL - DELCO TUBE BOX - USA 
MAY - EVEREADY-RAYTHEON TUBE BOX - USA 
JUNE/JULY - OSRAM TUBE BOX - ENGLAND 
AUGUST - ERICSON TELEPHONE LIMITED - ENGLAND 
SEPTEMBER - Z & I AERO SERVICES LTD. - ENGLAND 

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Cartridge and Stylus data

1979 ASTATIC NEEDLE / STYLUS NUMBERING CODE (.7 MB PDF) 

1947 CLARKSTAN TYPE RV MONO CARTRIDGE DATA (2.1 MB PDF)  

1947 CLARKSTAN DATA - TONE ARM - SWEEP FREQUENCY TRANSCRIPTION - CARTRIDGE (3.6 MB PDF)  

EMPIRE 888 SERIES STEREO CARTRIDGE DATA (1.3 MB PDF) 

1947 GENERAL ELECTRIC DL 1RM 6C (RPX010) MONO VR CARTRIDGE DATA (1.4 MB PDF)  

NEW   1951 GENERAL ELECTRIC RPX010, RPX040, RPX041 SERIES MONO VR CARTRIDGE DATA (1.0 MB PDF)  

NEW   1951 GENERAL ELECTRIC RPX050 SERIES MONO VR CARTRIDGE DATA (1.4 MB PDF)  

1955 GENERAL ELECTRIC RPX040A, RPX050A SERIES MONO VR CARTRIDGE DATA (2.5 MB PDF)  

GRADO F SERIES STEREO CARTRIDGE DATA (.9 MB PDF)  

SHURE MODEL M3D STEREO CARTRIDGE DATA (2.2 MB PDF)  

SHURE MODELS M71M-B, M75M-B, M75M-G, M91MG-D STEREO CARTRIDGE DATA (1.0 MB PDF)  

SHURE MODEL M75 TYPE D STEREO CARTRIDGE DATA (.7 MB PDF)  

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Pacific T.V.
NOS Tubes | Used Tubes | Tube Sockets | Specials | Odds & Ends | Ebay Auctions | Schematics | Photo Gallery | Links | Contact Us