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Old 2nd February 2013, 06:51 AM   #1
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Default Gold plated Dynaco ST-70 for $3k

check this out:

Dynaco Stereo 70 Gold Edition Tube Amp 24K Gold Plated Fully Restored ST70 | eBay

with original selenium bias rectifier.

Art
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Old 2nd February 2013, 01:20 PM   #2
Loren42 is offline Loren42  United States
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I don't like the blue wire. If it was another color, that would be different.
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Old 2nd February 2013, 02:19 PM   #3
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Originally Posted by audiohead View Post

Art
The shipping @$1,158.73 is not less artful.
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Old 2nd February 2013, 02:25 PM   #4
roline is offline roline  United States
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$3k eye candy, still will sound like a $400 amp...
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SO many tubes, SO little time!!!
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Old 2nd February 2013, 02:50 PM   #5
TheGimp is offline TheGimp  United States
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With $400 of plating and silkscreen.
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Old 2nd February 2013, 06:40 PM   #6
20to20 is offline 20to20  United States
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He blew the value of that project with the unnecessary circuit mods.

Beautiful amp though.
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Old 3rd February 2013, 02:32 AM   #7
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So why $3000? The vintage electronics market is ridiculous! I hate eBay.
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Old 3rd February 2013, 04:07 AM   #8
TheGimp is offline TheGimp  United States
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No mention of compensation for the higher B+ due to (1) higher ac line voltage today, (2) removal of the 5AR4 rectifier heater load, and (2) the fact that he removed the valve rectifier and replaced it with SS rectifiers which have lower voltage drop.

I've not been a fan of Sprague Atom capacitors. The quality just hasn't been there in the past 20 years, but that is personal preference. In the 70s and 80s I would have recommended them.
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Old 3rd February 2013, 04:33 AM   #9
12B4A is offline 12B4A  United States
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Removing that rectifier tube function but leaving the heater connected was a master stroke of tackiness.
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Old 3rd February 2013, 04:59 AM   #10
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Originally Posted by 12B4A View Post
Removing that rectifier tube function but leaving the heater connected was a master stroke of tackiness.
If you study the picture of the wiring very closely, it lools to me like the rectifier tube is still connected (both plates & filament) and the SS diodes are in parallel with the tube. You can just see the blue wires on pins 4 & 6. Make your own decisions about the quality of that type of work.
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