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ST 70 best sounding version?

Thanks for reading and for your input.  I am thinking of acquiring another tube amp to use in a secondary system and there are so many versions of the Dynaco ST70 available (will Vincent, latino, van alstine, etc).  Has anybody heard several and any feedback would be greatly appreciated....Ralph/Atma too!   Cheers!
pehare
viridian's avatar
viridian
4,184 posts
 
Agreed that the ST120 can use a tube rectifier and produce full output, just not a 5AR4. Mr. Latino makes it pretty clear in the post below:

http://dynacotubeaudio.forumotion.com/t479-st-120-rectifier-choices

4 KT88 or 6550 are just going to require more current than the little rectifier can put out at full voltage. If you don’t need full power than save some money and buy the ST70. Note that the original Dynaco MKiii amps use two 5AR4s to provide the B+ voltage to the same 4 KT88s.
jsl1234
32 posts
 
 "....just not a 5AR4."  Noted :)
viridian's avatar
viridian
4,184 posts
 
Looking at the specs, Mullard GZ33 would get you full power out of 4 KT88. A little spendy perhaps. It would be nice if the Russians would reissue that tube.
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