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Best Tubes on Market today?

I'd like to upgrade tubes on my Mastersound Compact 845 SET.
I'm getting a loud buzzing noise from both channels at  listening position which I find extremely annoying.
 My current tubes are Shuguang 845C (cheap Chinese electron). Pre amp tubes are Tungsram ECC82 and driver tubes 6SN7 EH. Probably all cheap stock tubes. I Love the the sweet sound but noise level is unacceptable.  Also very audible transformer noise, but I doubt there is a fix for that. Are there other ways to minimize tube/transformer noise?

What are the most reliable aforementioned tubes out there and what is the best place to get them?
Upscale audio seems to have quite a selection. PSVANE was also recommended by some. 
 I would prefer not to spend more than $600 on 845 tubes and hoping for reliable clean sounding tubes all around.    
I also have C2600 preamp with stock tubes. Any advice on those? 
ei001h

Showing 1 response by three_easy_payments

three_easy_payments's avatar
three_easy_payments
2,097 posts
 
DC offset most certainly can and does exist on AC lines.  And it can definitely cause or exacerbate mechanical transformer hum/buzz on both tube and SS amps.  I have personally witnessed even an inexpensive Emotiva CMX-2 reduce mechanical hum/buzz.  I have also observed DC offset effects reduced using an Isotek EVO3 Synchro Uni.


Also, while I suspect it's really rare for tubes to buzz it has happened to me once.  On a Cary SLI-80 the rectifier tubes were buzzing and it was 100% fixed by replacing those rectifier tubes.  I've never witnessed any other tubes buzz.  Most tube noise sounds like tuning in a staticky AM radio station.
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