Mullard Tubes
Mullard Tubes
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 MULLARD ECL85 6GV8 TUBES NIB NOSBRITISH MADE CLEAN  US $8.00
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 12AU7A NOS Mullard Master Series 10M US $100.00
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 2 Mullard Hammond ECC83 Tubes 12AX7 MATCHED PAIR US $18.00
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 2 Mullard ECC83 Tubes 12AX7 TEST STRONG US $28.00
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 MULLARD ECC91 TUBE BRITISH MADENIB NOS TUBE CLEAN US $5.00
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 MULLARD 12AX7 ECC83 GRAY PLATES O GETTER I65 ELECTROHOME made in Canada US $13.00
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 Mullard Amperex e182cc 7119 pair 12AU7 tubes US $49.99
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 IEC MULLARD EF80 6BX6 TUBENIB NOSBOX AND TUBE CLEAN ITALY US $4.00
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 Vintage Magnavox EL84 6BQ5 Stereo Tube Amplifier Mullard Blackburn Tubes US $134.50
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 FOUR VINTAGE MULLARD EL34 6CA7 AMPLIFIER TUBE XF3 US $160.00
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 IEC MULLARD 6CG8A TUBENIB NOSVERY CLEAN TUBE AND BOX US $4.00
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 EL84 INT MONO TUBE AMPLIFIER HI FI STEREO MATE MULLARD MODEL P B 12 USA US $49.99
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 EL34 6CA7 Mullard xf2 Tubes lOl Pair Great Britain NOS NIB Test Great 4363 US $124.99
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 2 NOS Test Mullard 2 NOS NIB US 5AR4 GZ34 Audio Tubes US $183.88
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 MULLARD GZ37 CV378 U54 MILITARY RECTIFIER FROM BLACKBURN LANCASHIRE GT BRITAIN US $100.00
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 Vintage IEC Mullard 6AW8A Vaccum Tube Amp Radio Ham US $5.99
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 3 NEW OLD STOCK VACUUM TUBES PCF800 US $4.99
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 MULLARD IEC 6BE6 EK 90 AND MULLARD HEATH 6AL5 TWIN DIODE TUBE PAIR US $1.00
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 Mullard Telefunken Western Electric Tungsram Empty Boxes 4296 US $49.99
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 Strong DAYSTROM by MULLARD Short Gray Plate O Getter 12AX7 ECC83 Tube US $44.99
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 Dynaco FM 3 FM Tube Tuner NR US $71.00
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 7247 Tube The Fisher Stereo Tube Fisher 7247 US $69.99
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 Harman Kardon Tube Mono Stereo Integrated Amp AX 20 The Nocturne US $135.00
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 VINTAGE FISHER 500C 500 C TUBE RECEIVER AND MANUAL US $405.00
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 MULLARD Long Gray Plate 2 Support Square D Getter 12AU7 ECC82 Tube US $59.99
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 Low Testing MULLARD Long Gray Plate 2 Support Square D Getter 12AU7 ECC82 Tube US $.55
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 10 x Tubes EF86 6CF8 Valvo Mullard Tube EF 86 with partial logos US $59.00
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 2 Tubes EF86 6CF8 Valvo Mullard Tube EF 86 match 36mAc US $19.00
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 2 Tubes EF86 6CF8 Valvo Mullard Tube EF 86 match 30mAc US $19.00
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 2 Tubes EF86 6CF8 Valvo Mullard Tube EF 86 match 31mAc US $19.00
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 Mullard UK halo getter 6DJ8 ECC88 6922 strong matched pair US $11.50
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 MULLARD CV4004 KQDD K 12AX7 ECC83 2 tubes MILITARY GRADE MATCHED PAIR NOS US $240.00
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 2 Mullard 12AX7 tubes Blackburn same date code halo getters US $75.00
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 Mullard 5U4G valve 53KU U53 tube US $65.00
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 NIB NOS Mullard 7189 Radio Audio Vacuum Tube Valve Great Britain US $36.99
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 ONE 6EU7 MULLARD Great Britian VACUUM TUBE US $7.99
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 Revox G 36 Rare 75 15 ips Half Track Superb Condition US $1,000.00
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 3 pcs Eico Mullard 12AT7 or ECC81 dual triode tubes made in England US $19.99
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 MULLARD DYNACO EL34\6AC7 BROWN FAT BASE CODE XF1 US $190.50
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 Mulllard UK Amperex UK Red Print A Frame 6DJ8 ECC88 6922 NOS strong matched quad US $21.50
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 2 MULLARD 12AU7 TUBES LONG PLATE D GETTER TEST VERY GOOD D92 US $22.00 |
 MULLARD 12AX7 TUBE LONG PLATE D GETTER TEST VERY GOOD D91 US $100.00 |
 7 VINTAGE TUBE BULBS GE MULLARD NATIONAL ELECTRONICS NEW UNTESTED US $28.50
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 LOT Philips EF37A tubes made in England by Mullard 1965 NOS NIB 59pcs US $1,500.00
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 Mullard ECC81 12AT7 ANOS US $25.00
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 JS010 Vtg Mullard Vacuum Tube PL36 Tested US $4.99
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 1 Mullard 6AQ5 Amplifier Vacuum Tube Tested Strong US $6.99
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 Mullard LF183 4EH7 TUBE NOS Tested US $.99
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 NEW OLD STOCK MULLARD UK MADE GZ32 CV593 5V4G RECTIFIER ORIGINAL CARTON US $25.00
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 Mullard 6AV6 matched pair tubes Very Rare 12AX7 half section Mullard Sonics US $18.00
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 Vintage EICO Tube Pre Amp Amplifier HF 61 High Fidelity Master Control NR US $15.50
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 {3} 6AQ8 ECC85 TUBES Tested Strong The Fisher Dynaco US $9.95
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 1 AMPEREX TEKTRONIX 8608 GOLD PIN VINTAGE NOS VACUUM TUBE GREAT BRITAIN US $14.95
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 Mullard E88cc Gold pin R code 6922 AVO 163 tested matched Pair US $28.00
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 Mached Pair Audio Tubes 6J7G FIVRE Mash Plate Sim EF37 Mullard x Leak US $49.99
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 12AX7 ECC83 tube Mullard Amperex Great Britian 1960 nice bargain 318 US $40.00
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 2 vintage output Transformers for Tube Amp EcL82 EL84 o 1 US $29.00
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 Mullard 12AX7 ECC83 Preamp Vacuum Tube TESTS NEW US $3.25
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 Vintage Mullard IEC 12AX7 ECC83 Great Britain Preamp Tube US $11.50
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 Vintage Silvertone Stereo Tube Amplifier 10WPC Sovtek EL84M Mullard 12AX7 US $199.00
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 12AT7 ECC81 tube NOS Amperex Bugle Boy 1 pc US $34.99
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 MULLARD ECF801 TUBEMADE IN GREAT BRITAIN NIB NOS CLEAN US $4.99
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 12AX7 ECC83 Amperex tube Holland believed 1963 strong tube labeled HK 321 US $50.00
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 Lot of 32 RCA GE Sylvania Mullard 6AU6 6AU6A CB Ham Radio Amplifier Vacuum Tubes US $24.99
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 NOS MULLARD 12AU7 ECC82 LONG PLATE AUDIO PREAMPLIFIER TUBE f FISHER SCOTT US $21.05
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 5AR4 GZ34 Mullard Matched Pair Vintage US $77.50
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 Mullard 12au7a Amp Tube Great Britian Tested Strong US $5.00
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 2 BEAUTIFUL FISHER 80AZ 80 AZ TUBE AMPLIFIERS MULLARD BV EL37 TUBES US $.99
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 Pair NOS mullard 6267 EF86 Tubes US $32.00
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 Eico HF 85 Tube Preamp Original Nice US $600.00
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Can I replace a power tube in a guitar amplifier without matching it to the existing power tubes?
I just bought a vintage amp and it has 3 Mullard EL34's but is missing the fourth. I have read that if i get a fourth and don't get it matched it will compete against the existing tubes. I eventually want to get a 4th matched tube and the other 3 tested but i want to turn the amp to make sure it is functioning properly as it is before investing in new tubes. Is it okay to play through it at low volumes with just the 3 tubes and/or can i get away with putting in a cheap EL34 in the empty slot to play for a little while before getting the 4th matched Mullard?
Most high end audio products using tubes require matched tubes for two reasons:
1. Sound quality
2. Electronic reasons.
The best case scenario - the mismatched tube will be relatively close to the installed tubes, and you'll have some distortion and poor sound quality.
Worst case scenario - the mismatched tube will be so far out of spec with the other tubes that it will lead to a lot of distortion, feedback, etc, and it will permanently damage some of the other electronic components in the amp.
Best advice - see if there is someone local who has a spare set of tubes that you can borrow to do your initial tests, then invest in a set of matched tubes afterwards.
If you really want to cheap out and not buy all four tubes, at least buy Matched Pair, and replace two of them. They are generally used in pairs - but you will need a schematic and someone with experience to tell you which two are paired with each other.