a tube primer for guitar and bass players - Guitar Amplifier Blueprinting

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Version 3.30 9/23/04 part 1 of 2 BEFORE WE EVEN GET STARTED … IF YOU JUST WANT A FEW BASICS AND HATE TO READ ....................................................... 4 BRIEF TUBE AND SOLID STATE DIFFERENCES ........................................................................................................................................ 4 DITTO – THE SWISS ARMY KNIFE OF THE RECORDING STUDIO AND FOR LIVE PERFORMANCE TO THE HOUSE SYSTEM......... 5 MY PERSONAL FAVORITE OR MOST IMPRESSIVE AMPLIFIERS............................................................................................................. 5 MATCHING IN BRIEF .................................................................................................................................................................................... 12 BIASING IN BRIEF ........................................................................................................................................................................................ 13 WHAT TUBES SHOULD I USE IN MY AMPLIFIER? - A MODERN DAY TUBE SELECTION PRIMER.................................................... 13 PREAMP TUBES ........................................................................................................................................................................................... 17 SAG – SPECIAL APPLICATIONS GROUP (SPECIFICALLY SELECTED TUBES FOR SPECIFIC NEEDS) ............................................ 17 THE BASICS OF PREAMP TUBE DIFFERENCES ...................................................................................................................................... 19 12AX7 (ECC83, 7025, 12AT7, 12AY7, 12AU7, AND MANY OTHERS) PIN CONNECTIONS..................................................................... 21 12AX7 RATINGS............................................................................................................................................................................................ 21 12AX7 SHORT DATA .................................................................................................................................................................................... 21 CHARACTERISTIC NOMENCLATURE USED BY TUBE ENGINEERS ...................................................................................................... 22 PREAMP TUBE OVERALL CHART OF SOME NOS AND MANY CURRENT TUBES ............................................................................... 32 ADDITIONAL SMALL SIGNAL TUBE TESTS AND REFERENCE .............................................................................................................. 35 RECENT TUBE TEST RESULTS .................................................................................................................................................................. 37 THE OUTPUT TUBES – THE PENTODES AND BEAM PENTODES .......................................................................................................... 46 BIASING – A NEEDED CONSIDERATION WHEN REPLACING OR CHANGING POWER TUBES .......................................................... 47 2
6V6 OUTPUT TUBES .................................................................................................................................................................................... 49 6L6 / 5881 / KT-66 TYPES............................................................................................................................................................................. 52 EL34 – E34LS – AND 6CA7 TYPES ............................................................................................................................................................. 59 MISCELLANEOUS AND OTHER OUTPUT TUBE TYPES........................................................................................................................... 64 6L6 / KT66 / 5881 / EL-34 TUBE OUTPUT CURRENT OUTPUT COMPARISONS..................................................................................... 66 POWER OUTPUT COMPARISON TEST RESULTS OF VARIOUS OUTPUT TUBES ................................................................................ 67 6550 / KT-88 TUBES...................................................................................................................................................................................... 70 POWER COMPARISON CHART OF CURRENT OUTPUT FOR THE KT-88 / 6550 FAMILIES.................................................................. 77 THE EL-84 TUBES......................................................................................................................................................................................... 78 TECHTIP ON EL-84 AMPS............................................................................................................................................................................ 78 OUTPUT POWER CHART FOR EL-84 FAMILY ........................................................................................................................................... 82 7027 AND 7591 TUBES................................................................................................................................................................................. 85 RECTIFIERS – VACUUM TUBE AND SOLID STATE .................................................................................................................................. 85 THE GT RATING SYSTEM – AN EXPLANATION OF “DISTORTION RATING” ALSO KNOWN AT TIMES AS “HARDNESS RATING” 92 CONVERSION INFORMATION – GT NUMBERING, FENDER COLOR CODES AND MESA COLOR CODES......................................... 92 3
Page 1: A TUBE PRIMER FOR GUITAR AND BASS P
Page 5 and 6: DITTO - The Swiss Army Knife of the
Page 7 and 8: THE ‘MARSHALL” STYLE AMPS in th
Page 9 and 10: HUGE ROCK AMP COMBO FOR THE CLASSIC
Page 11 and 12: Great designs with something worth
Page 13 and 14: Biasing in brief Bias your amp prop
Page 15 and 16: The Dr. Z Carmen Ghia. Sure, the go
Page 17 and 18: Preamp Tubes Please note that the t
Page 19 and 20: The basics of preamp tube differenc
Page 21 and 22: 12AX7 (ECC83, 7025, 12AT7, 12AY7, 1
Page 23 and 24: Keep in mind, the specs on the tube
Page 25 and 26: 12AX7-R2 - Sovtek 12AX7LPS Gain: 83
Page 27 and 28: ECC83-S - from the JJ factory Gain:
Page 29 and 30: 5751 New Manufacture Expected Gain
Page 31 and 32: The famed 7199 gold pin of the past
Page 33 and 34: 12AX7R3 Electro Harmonix (10/29/02)
Page 35 and 36: Additional Small Signal Tube Tests
Page 37 and 38: Recent tube test results DATE TUBE
Page 39 and 40: Fairly wide current spread, so bewa
Page 41 and 42: DATE TUBE B+ BIAS mA TC (gm) gp Gai
Page 43 and 44: B+ BIAS mA TC (gm) TUBE volts volts
Page 45 and 46: B+ BIAS mA TC (gm) DATE TUBE volts
Page 47 and 48: This is simply a basic power output
Page 49 and 50: Maximum plate dissipation on tubes
Page 51 and 52: 6V6C - a new 6V6 off new tooling th
Page 53 and 54:
This is the 6L6C or straight bottle
Page 55 and 56:
6L6-R2 - The Svetlana 6L6. Prior to
Page 57 and 58:
KT-66-HP - Russia, built under cont
Page 59 and 60:
EL34 - E34LS - and 6CA7 types 59
Page 61 and 62:
EL34C - Chinese EL-34 (25 watt tube
Page 63 and 64:
The Groove Tubes GT-6CA7GE “The G
Page 65 and 66:
The RCA Gray Plate. 65
Page 67 and 68:
Power output comparison test result
Page 69 and 70:
RCA 7027A NOS A big KT-90 69
Page 71 and 72:
The KT-88C A very strong KT88, with
Page 73 and 74:
Sorry, but I just HAD to show a pho
Page 75 and 76:
6550-R - Russian 6550, takes longer
Page 77 and 78:
Power comparison chart of current o
Page 80 and 81:
A pair of the famed Telefunken NOS
Page 82 and 83:
Output power chart for EL-84 family
Page 84 and 85:
New Electro Harmonix EL-84 (June 20
Page 86 and 87:
These are some of the 1980s JAN Phi
Page 88 and 89:
The 5R4-GYB, often used in place of
Page 90 and 91:
5U4GB above - 362 volts max. 5V4G a
Page 92 and 93:
The GT Rating system - an explanati
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