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.

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What Hi-Fi? Sound and Vision - Help needed with Vintage Hi-Fi Setup

Many say that the sound is not all the great, but can become much better with some modifications

Dynaco Dynakit ST-70 Amplifier Assembly Instructions    US $9.00

FACTORY WIRED & UPGRADED DYNACO DYNAKIT ST-70 TUBE AMPLIFIER    US $674.99

Dynakit St70 Stereo 70 Amplifier Amp Mint w/Orig Dynaco EL34 Tubes    US $495.00

DYNACO ST70 **NEW** GOLD PLATED RCA INPUT JACKS!!    US $15.50

NEW 6GH8A STUFFED BOARD Dynaco ST70 Stereo 70 Dyna Amp    US $54.99

Dynaco ST-70 ST-35 Mark III, Mark IV Soft Start    US $54.99

SUPER CLEAN DYNACO ST-70 STEREO TUBE AMP, RESTORED!!! VERY NICE!!!!    US $320.00

Factory Wired original Dynaco ST-70 with factory wired sticker alll tubes are gd    US $349.99

Nice Original Cage For Dynaco ST-70 Tube Amplifier    US $49.95

Dynaco ST-70/Mark III filter cap NEW 30/20/20/20 525V    US $37.00

Dynaco ST 70 driver broad cover plate    US $56.00

Dynaco ST-70 Chassis Free Shipping    US $119.99

Dynakit Dynaco ST70 Stereo 70 Tube Amplifier Tube Amp    US $550.00

Power Supply Delay Board dynaco ST70 EL34 6550 tube amp    US $30.00

Dynaco Dynakit ST-70 ST70 PC-3A Stereo tube Amp EL34 6CA7 PC-3A Stereo PCB Board    US $15.00

CAPACITOR CAN 30/20/20/20 µF @ 525 V Dynaco ST70 ST-70    US $49.50

Dynaco Dynakit ST70 Output transformers cloth leads A470 PAIR    US $157.50

triple binding speaker posts for Dynaco ST70 & MK3 & MK4 amps    US $35.00

VIntage Dynaco ST 70 Stereo Tube amp Beautiful    US $399.99

NEW STUFFED BOARD Dynaco ST70 Stereo 70 Dyna Amp (7199)    US $65.00

Dynaco ST-70 Original PC-3 Board PCB, STOCK FREE SHIPPING    US $43.98

Dynaco ST70 ST-70 Amp Fully BOARD PC3 PC-3A SOLEN CAP    US $40.49

NEW 6GH8A STUFFED BOARD Dynaco ST70 Stereo 70 Dyna Amp    US $65.00

* NOS DYNACO ST70 10K LINEAR BIAS POT CLAROSTAT 1960's    US $45.00

Dynaco ST-70 Tube Amp (Works) with cage    US $11.50

DYNACO ST 70 WORKING with NEW FILTER CAP    US $595.00

One Sylvania 7199 Tube for your Dynaco ST-70, Tested Excellent    US $25.00

Dynaco Dynakit ST-70 Power transformer amp upgrade 1 for Dynaco EL34 tube PP amp    US $72.00

upgrade 2x 120V 240V Dynaco Dynakit ST-70 power transformer amp hi-current 6CA7    US $90.00

Dynaco ST70 Stereo 70 Amplifier NEW BARE BOARD (7199)    US $25.00

Dynaco ST-70 Tube Amp PA060 Power Transformer    US $79.95

Dynaco ST-70 Tube Amp PA060 Power Transformer    US $59.95

Dynaco ST70 Premium Tube Set 6CA7 Fat Boy    US $179.97

CAPACITOR CAN 30/20/20/20 µF @ 525 VDC Dynaco ST-70    US $49.50

2 Adapters 6AU8 / 7199 tubes for dynaco st70    US $49.00

Dynaco ST70 ST-70 NEW Amp Fully BOARD PC3 SOLEN CAP    US $40.49

Dynaco ST70 ST-70 Amp BARE BOARD PC3 PCB 7199 + EL34 PP    US $13.49

Dynaco ST70 ST-70 NEW Amp Fully BOARD PC3 PC-3 wima cap    US $38.69

CAPACITOR CAN 30/20/20/20 µF @ 525 V Dynaco ST70 ST-70    US $49.50

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

1 set Parts Components Resistor Capacitor Diode for Dynaco ST70 Dynakit ST-70    US $18.50

New ALLEN BRADLEY Locking 10K Pot *Dynaco ST-70 *Mark III *Free Shipping    US $9.95

DYNACO ST-70 BIAS MODULE NEW!!!    US $49.95

DavidyeeAudio handmade modify Dynaco Dynakit ST-70 6CA7 EL34 6GH8 5U4 tube amp    US $525.00

DYNACO ST-70 MARK-II, III, IV ST-35 AMPLIFIER REPAIR, MODIFICATION W/SHIPPING    US $60.00

1962 Dynaco ST-70 amp,PAS-2 preamp+FM-1 tuner print Ad    US $9.99

1960 DYNACO ST70/Mark III/Mark IV,etc vintage print Ad    US $9.99

Transformer Bundle w/ Free Choke for Dynaco ST70 240V    US $399.95

CAPACITOR CAN 30/20/20/20 µF @ 525 VDC Dynaco ST70    US $49.50

Dynaco ST-70 Rebuilt, SS Chassis, New Board, Rebuilt Power Supply, Mullard EL34    US $995.00

DYNACO ST-70 DRIVER BOARD POPULATED NEW!!!    US $139.00

SUPER SOFT START / VOLTAGE BUCKER 4 DYNACO ST-70, MARK II III ST-35    US $62.00

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.