Vintage Audio Gear » Amplifier Reviews http://vintage-audio-gear.com Just another WordPress weblog Sat, 06 Feb 2010 19:29:32 +0000 http://wordpress.org/?v=2.8.3 en hourly 1 What Hi-Fi? Sound and Vision – Help needed with Vintage Hi-Fi Setup http://vintage-audio-gear.com/what-hi-fi-sound-and-vision-help-needed-with-vintage-hi-fi-setup http://vintage-audio-gear.com/what-hi-fi-sound-and-vision-help-needed-with-vintage-hi-fi-setup#comments Fri, 27 Mar 2009 20:03:35 +0000 admin 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

]]> http://vintage-audio-gear.com/what-hi-fi-sound-and-vision-help-needed-with-vintage-hi-fi-setup/feed 0 Dynakit ST-70 Reviews http://vintage-audio-gear.com/dynakit-st-70-review http://vintage-audio-gear.com/dynakit-st-70-review#comments Tue, 03 Feb 2009 00:35:53 +0000 admin http://vintage-audio-gear.com/?p=185 The 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

dynakit-st70

NEW STUFFED BOARD Dynaco ST70 Stereo 70 Dyna Amp 7199 NEW STUFFED BOARD Dynaco ST70 Stereo 70 Dyna Amp 7199 Paypal US $65.00 7h 46m
Upgrade Power Transformer for Dynaco ST 70 PA 060 ST70 Upgrade Power Transformer for Dynaco ST 70 PA 060 ST70 Paypal US $147.95 15h 15m
Nice Pair of Dynaco ST 70 Tube A470 Output Transformers Nice Pair of Dynaco ST 70 Tube A470 Output Transformers Paypal US $185.00 1d 11h 39m
DYNACO DYNAKIT ST 70 ST70 TUBE AMP ASSEMBLY MANUAL DYNACO DYNAKIT ST 70 ST70 TUBE AMP ASSEMBLY MANUAL Paypal US $4.50 1d 15h 49m
Dynaco Dynakit ST 70 ST70 PC 3A Stereo tube Amp EL34 x1 Dynaco Dynakit ST 70 ST70 PC 3A Stereo tube Amp EL34 x1 Paypal US $19.00 2d 4h 26m
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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.

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