Since I bought my main system two years ago, my passion for vintage hi-fi has grown, and now I would like to assemble a good-quality 70/80s turntable, amp , and speakers on a budget of around £250.
Read MoreThe Dynaco ST-70 is probably one of the best amps for individuals new vintage tube amplifiers. The first kits were introduced in 1959. The Dynaco ST-70 provides 35 watts continuous, with a peak of 80 watts for each channel. The unit comes with a 4 el34 tubes and 2 gz-34's. The overall unit comes in at a hefty 32lbs measuring 13 inches by 9.5 inches by 6.5 inches high. The ST-70 provides taps for 4, 8, and 16 ohms.
Many say that the sound is not all the great, but can become much better with some modifications
 Dynaco ST-70/Mark III filter cap NEW 30/20/20/20 525V  US $37.00
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 Dynaco ST 70 driver broad cover plate US $61.00
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 Dynaco ST-70 Chassis Free Shipping US $119.99
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 VIntage Dynaco ST 70 Stereo Tube amp Beautiful US $399.99
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 NEW STUFFED BOARD Dynaco ST70 Stereo 70 Dyna Amp (7199) US $65.00
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 Dynaco ST-70 Original PC-3 Board PCB, STOCK FREE SHIPPING US $2.25
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 Dynaco ST70 ST-70 Amp Fully BOARD PC3 PC-3A SOLEN CAP US $44.99
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 NEW 6GH8A STUFFED BOARD Dynaco ST70 Stereo 70 Dyna Amp US $65.00
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 * NOS DYNACO ST70 10K LINEAR BIAS POT CLAROSTAT 1960's US $45.00
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 FACTORY WIRED & UPGRADED DYNACO DYNAKIT ST-70 TUBE AMPLIFIER US $674.99
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 Dynaco ST-70 - Factory Wired. US $263.88
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 Dynaco ST-70 Tube Amp (Works) with cage US $141.38
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 Dynaco ST70 Stereo 70 Amplifier NEW BARE BOARD (7199) US $25.00
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 Dynaco ST-70 Tube Amp PA060 Power Transformer US $59.95
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 Dynaco ST70 Premium Tube Set 6CA7 Fat Boy US $179.97
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 Dynaco ST-70 Tube Amp PA060 Power Transformer US $79.95
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 CAPACITOR CAN 30/20/20/20 µF @ 525 VDC Dynaco ST-70 US $49.50
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 2 Adapters 6AU8 / 7199 tubes for dynaco st70 US $49.00
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 Dynaco ST70 ST-70 NEW Amp Fully BOARD PC3 SOLEN CAP US $44.99
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 Dynaco ST70 ST-70 Amp BARE BOARD PC3 PCB 7199 + EL34 PP US $14.99
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 Dynaco ST70 ST-70 NEW Amp Fully BOARD PC3 PC-3 wima cap US $42.99
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 CAPACITOR CAN 30/20/20/20 µF @ 525 V Dynaco ST70 ST-70 US $49.50
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 Choke for Dynaco ST70 Mk2 Mk 3 c354 NEW & Sunn Tube Amp US $21.95 |
 CAPACITOR CAN 30/20/20/20 µF @ 550 VDC Dynaco ST-70 US $69.50
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 SUPER SOFT START / VOLTAGE BUCKER 4 DYNACO ST-70, MARK II III ST-35 US $62.00
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 Dynaco Dynakit ST-70 Amplifier Assembly Instructions US $9.00
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When your buying a new Dynaco ST-70 you'll want to remember a few things: Make to sure to determine whether or not the amp is in working order. You'll want to know what work if any has already been done to the amp particularly if the work deviates for the standard schematic.
When you get your new amp some upgrades you may want to consider. This is assuming the no major repair work needs to be completed, like changing the driver board. You'll want to replace all resistors with MF-MO types. Definitely replace all capacitors with film types and replace the ceramic capacitors with Silver Mica. Put approximatelya 100ufd capacitor after the choke in the powersupply. Remove the cathode resistors or significantly reduce them by atleast 10 times in value. This one change will dramatically improve the bass output. I would then remove the mono switch and replace all of the RCA Jacks. Add a capacitor to the bias supply and replace all of the capacitors in that section.