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 Power transformer amp upgrade 1 for Dynaco EL34 tube PP amp    US $72.00

CAPACITOR CAN 30/20/20/20 µF @ 550 VDC Dynaco ST-70    US $69.50

SUPER SOFT START & VOLTAGE BUCKING 4 DYNACO ST-70 MARK III, IV FISHER SCOTT    US $62.00

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

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

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

tubes4hifi new OCTAL driver PCB for Dynaco ST70 - full kit, with CCS    US $99.00

ORIGINAL DYNACO ST70 STEREO EL34 AMPLIFIER ORIGINAL BLACK CATS AND CLOTH WIRE    US $550.00

Dynaco ST-70 Stereo Tube Power Amp    US $202.50

Dynaco,Dynakit ST-70 tube amp    US $102.50

Vintage Classic 1960s Dynaco Dynakit ST-70 Stereo Tube Amp Amplifier    US $276.00

(2) Knight Output Transformers UL for 6CA7/EL34 Tube Amp Dynaco ST70 8Ω Tap Only    US $119.99

Siemens/RFT EL34 Matched Quad + Siemens 6U8, NOS. Ultimate set for Dynaco ST-70    US $199.00

Dynaco St-70 Tube Amplifier    US $549.95

Power Supply Delay Board Dynaco ST70 EL34 6550 KT88 6L6 6V6 El84 tube amplifiers    US $56.99

Dynaco ST70 Stereo 70 Amplifier NEW BASIC BARE PC BOARD (7199), Made In USA    US $18.00

Transformer Bundle w/ Free Choke for Dynaco ST70 240V    US $409.95

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

DYNACO ST 70 6GH8 TUBES DRIVER PC-3 TUBE AMP CIRCUIT BOARD POWER AMPLIFIER MOD    US $69.99

Dynaco Dynakit ST-70 ST70 PC-3A Stereo tube Amp EL34 6CA7 PC-3A Stereo PCB Board    US $13.00

Dynaco ST-70 Rebuilt, SS Chassis, New Board, Rebuilt Power Supply, Mullard EL34    US $1,095.00

TWO NOS DYNACO A470 PP OUTPUT TRANSFORMERS/DYNACO ST70*BRAND NEW*    US $229.00

Dynaco Dynakit ST-70 Amplifier Assembly Instructions    US $9.00

Dynaco ST-70 tube amp cage.    US $45.00

DYNACO ST-70 SUTHERLAND MOSFET JFET TUBE LESS DRIVER BOARD    US $99.99

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

Dynaco ST70 ST-70 Amp Fully BOARD PC3 PC-3A SOLEN CAP    US $44.99

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

DYNACO ST-70 STEREO TUBE AMPLIFIER DYNACO PAS3 TUBE PREAMP DYNACO TUBE TUNER    US $1,499.99

Choke for Dynaco ST70 Mk2 Mk 3 c354 NEW & Sunn Tube Amp    US $21.95

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

Vintage Dynakit Dynaco ST 70 Amp Amplifier Cage Only    US $45.00

Power Supply Delay Board Dynaco ST70 EL34 6550 KT88 6L6 6V6 El84 tube amplifier    US $29.99

2 Adapters 6AU8 6BH8 / 7199 + 2pcs 6AU8 or 6BH8 tubes for dynaco st70    US $49.00

Dynaco ST70 ST-70 NEW Amp Fully BOARD PC3 SOLEN CAP    US $44.99

Dynaco ST70 ST-70 Amp BARE BOARD PC3 PCB 7199 + EL34 PP    US $14.99

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

Dynaco ST70 ST-70 NEW Amp Fully BOARD PC3 PC-3 wima cap    US $42.99

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

Dynaco ST-70 Stereo Tube Amplifier, Exceptionally Clean, Retubed    US $749.00

Power Supply Delay Board Dynaco ST70 EL34 6550 KT88 6L6 6V6 El84 tube amplifier    US $99.99

DYNACO ST 70 7199 TUBES DRIVER PC-3 TUBE AMP CIRCUIT BOARD POWER AMPLIFIER    US $79.99

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

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.