Pair Dynaco
Pair Dynaco
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 MULLARD Re Issue EL34 6CA7 Platinum Matched Pair  US $38.25
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 ShuGuang EL34 B EL34 Vacuum Tubes Matched Pair 6CA7 US $34.99
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 Pair of Dynaco ST 35 PC 13 a filter board BARE PCB US $29.99
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 DYNACO HAFLER PHASE LINEAR GOLD PLATED BANANA PLUG SET US $21.95
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 Dynaco Lit set Mark 4 bottom Tube amplifier cover Transformer Audio MARK 2 US $10.00
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 Dynaco A25 10 35 50 Speaker Logo PAIR US $18.00
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 Vintage PAIR of DYNACO Denmark A 25 Bookshelf Stereo Speakers A25 US $55.00
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 DYNACO ST70 NEW GOLD PLATED RCA INPUT JACKS US $12.00
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 DYNACO DYNAKIT MK III CHASSIS 1 PAIR AS IS US $46.00
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 Tube Amp Chassis DIY 13x10x2 Aluminum Project Box Enclosure Stereo Amp Preamp US $74.00
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 Vintage RCA tube amp mono blocs US $500.00
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 Dynaco VTA ST 120 60 WPC stereo TUBE amplifier KIT US $869.00
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 JENSEN PIO Audiophile Caps 47uF 630 Volts for Tube Amps US $29.00
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 FACTORY MATCHED PAIR MULLARD EL84 EL 84 6BQ5 US $36.50
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 DYNACO ST 120 3300 MFD OUTPUT CAP AND COIL MATCHED SET US $36.95
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 FACTORY MATCHED QUAD MULLARD EL84 EL 84 6BQ5 US $73.00
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 NEW Dynaco MKIV MK4 Amp Fully PCB PC4 X2 6GH8 WIMA CAP US $42.99
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 Matched Pair of K40y 9 0022uF 400v Paper in Oil Guitar capacitors US $9.78
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 4 Factory Matched Tung Sol Tungsol KT120 US $169.00
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 JJ Tesla KT88 Tubes Matched Quad McIntosh Dynaco Etc US $162.50
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 Dynaco MKIII MK III MK3 MK 3 Deluxe Restoration Kit US $235.00
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 Rare Vintage Grafyx SP8 2 way Speakers 8 Woofer Phillips Tweeter Wood Cabinets US $169.95
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 PAIR 2X NEW 80 40 30 20 550v CAPACITORS MCINTOSH MC60 MC30 DYNACO SCOTT FISHER US $134.98
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 DYNACO HH SCOTT 6GH8A TO 7199 TUBE SOCKET ADAPTER SET US $27.50
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 FACTORY MATCHED PAIR TUNG SOL TUNGSOL 6550 US $67.00
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 Factory Matched Octet Tung Sol Tungsol KT120 US $342.00
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 2 Factory Matched Genalex Gold Lion KT88 6550 US $104.00
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 DYNACO MARK VI EL34 6550 VINTAGE TUBE AMPLIFIER US $2,837.43
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 Dynaco SCA35 SCA 35 Preamplifier fully BOARD PC11 PC 11 US $32.99
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 Mint Vintage Peerless A 100 A 100A Mono Vacuum Triode Tube 1948 AMP Amplifier US $8,000.00
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 Dynaco LMS Speakers Rare Variant of the A 25 EXC US $299.00
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 Dynaco MKIII MK III MK3 MK 3 Restoration Kit US $135.00
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 NOS TELEFUNKEN RIBBED ECC83 12AX7 MATCHED PR SUPER STRONG HIGH SPEC US $99.00
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 Pair Mullard for Dynaco EF94 6AU6 6AU6A Vacuum Tubes Tested Strong US $29.99
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 Pair Dynaco A25 upgraded 27tffc tweeters Auricaps sound great real wood US $125.00
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 Pair Dynaco A35 upgraded 27tffc tweeters Auricaps sound great real wood US $150.00
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 NOS TELEFUNKEN EZ80 6V4 FOR Dynaco FM 3 McIntosh MR65 US $110.00
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 NOS TESTING 1958 MULLARD LONGPLATE DUAL SUPPORT GTR ECC83 12AX7 MATCH PAIR US $215.00
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 KILLER NOS NIB Matched Pair of Mullard Mil Spec GZ32 CV593 US $89.99
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 Dynaco VTA ST 70 35 WPC stereo TUBE amplifier KIT US $679.00
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 NOS TESTING 1959 TELEFUNKEN RIBBED ECC83 12AX7 MATCHED SAME DATE PR SUPER STRONG US $150.00
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 1 NEW STUFFED BOARD Dynaco MKII MKIII Dyna Mark III US $55.00
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 RARE LEGENDARY VINTAGE DYNACO A 25 SPEAKERS WALNUT CABINETS GREAT CONDITION US $275.00
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 DYNACO ST 35 TUBE AMPLIFIER EL84 MULLARD 6BQ5 US $684.15
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 2pc Dynaco Dynakit Stereo Amp ST 35 ST35 PCB 12DW7 6BQ5 US $16.00
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 Tung Sol 12X4 Rectifier Tube for Dynaco PAS Pre Amp NOS NIB Tested US $34.00
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 Vintage SEAS Dynaco A50 Speakers Sony Danish Modern US $300.00
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 NICE NOS NIB Mullard Dual Halo EL34 6CA7 Marshall Hiwatt Amp US $325.00
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 A pair of legendary Dynaco A 431 output transformer US $249.50
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 GOLDEN DRAGON KT88 MATCHED PAIR VINTAGE TUBES FULLY TESTED FOR MCINTOSH DYNACO US $92.98
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 Dynaco VTA M 125 125 watt tube amplifier KIT US $829.00
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 PA135 Mk IV mk4 Power Transformer for Dynaco Tube Amp US $115.95 |
 NOS TESTING 1958 MULLARD LONGPLATE DUAL SUPPORT GTR ECC83 12AX7 DATE MATCH PAIR US $240.00
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 NOS TESTING 1956 mC1 MULLARD LONGPLATE SQUARE GTR ECC83 12AX7 DATE MATCH PAIR US $365.00
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 TWO NOS DYNACO A470 PP OUTPUT TRANSFORMERS DYNACO ST70BRAND NEW US $229.00
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 DIY POWER TRANSFORMER UNIVERSAL ULTIMATE MADE IN USA US $109.95 |
 2 strong matched Telefunken Dyna 12AX7 ECC83 tubes S P US $147.95
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 Dynaco A 25XL speaker CROSSOVER NETWORK ASSEMBLY for DIY project US $25.00
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 Dynaco ST35 ST 35 PCB and capacitor board FREE manual US $24.42
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 Pioneer SX 626 am fm stereo receiver preamplifier tuner great for 301 A 25 AR 4x US $150.00
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 Dynaco Mullard EL34 matched pair brown base maximatcher tested US $150.00
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![PAIRS] CROSSOVER FROM DYNACO A 25 CONSOL SPEAKERS VERY NICE VINTAGE](http://www.bakmytunes.com/images/e/280836840685_0.jpg) PAIRS] CROSSOVER FROM DYNACO A 25 CONSOL SPEAKERS VERY NICE VINTAGE US $75.00
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 VINTAGE SONY DANISH MODERN HORIZONTAL BOOKSHELF SPEAKERS w ALNICO DRIVERS US $149.99
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 Pair of SEAS Dynaco 25 TV EW 10 woofers speakers US $137.03
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 Pair of SEAS Dynaco 87H 1 1 2 Dome Tweeters Mint US $117.45
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 NEW FACTORY MATCHED QUAD TUNG SOL KT120 KT 120 RUSSIA US $175.00
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 Matched Pair Of Genalex Gold Lion KT88 Power Tubes US $95.00
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 PROTON D 940 am fm stereo receiver PREAMPLIFIER 4 ST 120 AR 4X A 25XL 250 US $200.00
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 1995 AR 302s 302 speakers Ken Kantor design upgrade of AR 5 US $600.00
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 CLONE DYNACO ST 35 6L6 EL34 PUSH PULL STEREO TUBE AMP US $69.99
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How do I install dual bias adjustment pots. in my Dynaco Mk 3 amplifiers?
The Dynacos are 60 watt tube monoblock amplifiers,which have a single pot. to adjust the bias to the output tubes.This warrants the use of matched pairs of output tubes.I would like to install two pots.so that I can adjust bias to the output tubes independantly,and allow the use of unatched tubes.
Yes, you could do this. But by using mismatched tubes, even if the DC balance is set properly, you will increase distortion in the amp as each half of the audio waveform is amplified a different amount and on different non-linear portions of the tube's gain curve.
But if you should insist, then the easiest and best way to achieve balance in this amp with mismatched tubes might be to replace the common cathode resistor for the outputs (11.2 Ohm 1 Watt) with a variable resistor network rather than tampering with the tube bias circuit. Email me for details.
WK
April 3rd, 2010 in
Vintage Stereo Equipment