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Cary rocket 88 vs dynaco st70

I currently have a completely rebuilt and upgraded dynaco st70 that sounds very nice in my system.

Classe dr6 pre
Quad 11L monitors
Denon dvd/sacd

I am having some low level hum from my dynaco, and am considering a used Cary rocket 88.
If you have a rocket 88,how quiet are they,and would this be an overall sound quality upgrade over the dynaco?
Speakers are 6ohm, 86db and have plenty of volume with the dynaco.

I had a pair of 96db klipsch kg4 in the system and the hum was unbearable.

There are no groundloop issues since my bryston 3b at has no hum in the system.
????
dave
dav65mus
hifitime
715 posts
 
I have one in the closet and the only time it had a hum was when I had to replace the 7199's.It showed a short on the tube tester.I'm not familiar with the Cary Rocket.Maybe somebody will still see the post.A Cary owner most likely went through a Dynaco too.Maybe somebody on Audio Asylum might know.
tholt
547 posts
 
I own a Rocket 88R coupled to a passive preamp and speakers with 87db sensitivity. Dead quiet. I almost bumped my head into the tweeter trying to hear something. No noise. I've read elsewhere that the Rocket is known to be pretty noise-free with even higher sensitivity speakers.

No experience with the Dynaco's, see a lot of rebuilt ones here. But at what used Rockets are going for, it's almost a shame to get such a well made amp for so little coin.
calbrs03
184 posts
 
Rodman: Read though my old receipts last night trying to figure out what it was that Cary replaced. Here it is: 2-1200wf 450v VCC and 1-270K 2 WATT Mouser. If that's any help.
rodman99999
5,985 posts
 
Calbrs03- The two first ones are power supply filter caps. The other is a resistor.
rodman99999
5,985 posts
 
Dave- Like I said: I've owned both amps, and the last ST-70, from stock to rod-rodded(16 years). You won't miss your ST-70, once you've tried the Rocket 88 in triode mode(especially with some NOS inverter/driver tubes).
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