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Woo Audio Amp Owner Unite
Sep 29, 2015 at 10:20 PM Post #35,416 of 42,299
shaffer said:
So far I've stuck with stock-fit tubes. My other amps run 6SN7 drivers and I'd rather play with something different.

In essence, the only tube that has not introduced a buzzing sound is a RCA 6EW7 fat bottle. I have all other varieties of stock-fit tubes, some from different manufacturers. Mostly, Sylvania and GE. I also have 4 pairs that I inherited with the amp: TS, GE, and a Pinnacle. All buzz. FWIW, I have a GZ34, a Brimar, a JAN 1641, and a bunch of other rectifiers. Still, only one pair of bottles is silent. I'm not thrilled.
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Sorry to hear about your misfortune with the noisy tubes, or amp with these tubes.
The only power/driver tubes that buzz in my WA6 are the NU-6F8G's (which I thought I fixed with Deoxit) otherwise all of my other tubes are dead silent. [size=x-small]Right now I'm unfortunately in the process of eliminating either bad power/driver tubes or the rectifier tube in my WA6. I'm getting heavy static/failure in the left driver of my HP's, and I've already eliminated the HP's by switching them and still had the issue. Then I switched the power/driver tubes and still had the issue[/size]…[size=x-small]now I just changed the rectifier, so I'll see what happens…I hope its not the amp, but I do believe it is my UE-596 that is bad. [/size]
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Sep 29, 2015 at 10:26 PM Post #35,417 of 42,299
bpcans said:
Sorry, I haven't been keeping up here lately, but I'd definitely like to know which tubes have given you problems with your WA6? I've had my WA6 for a couple of years now, and have been lucky enough to have found a good tube combo using Sophia Electric 6SN7's and a USAF 596 rectifier.
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No noisy tubes ever in my wa6. Had a few 6f8g/6c8g will buzz but cleaning them fixed it.
With wa22 no noisy tubes and I've tried LOTS. A pair 5998s I returned for microphonics.
 
Sep 29, 2015 at 10:52 PM Post #35,421 of 42,299
3083joe said:
No noisy tubes ever in my wa6. Had a few 6f8g/6c8g will buzz but cleaning them fixed it.
With wa22 no noisy tubes and I've tried LOTS. A pair 5998s I returned for microphonics.
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I wish we could switch. Then I could use Mullard 6080's. My favorite power tube for the WA22.
 
As it stands it is stuffed in mine.
 
Sep 29, 2015 at 11:03 PM Post #35,423 of 42,299
joseph69 said:
  Sorry to hear about the noise issues…I like the 6F8G but I don't think I would buy another pair because of the noise, so I know how you feel.
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It's not the 6F8G. I tested that.
 
When I got a noisy tube. I switched the rectifier to a Mullard GZ32 and drivers to the RCA 6SN7 Greyglass. Noise stayed.
Switch the power tubes out and the noise went. So it is a power tube circuit problem.
 
Sep 30, 2015 at 2:41 AM Post #35,427 of 42,299
I see the upgraded WA5 on the woo website.  Are the rest of the amps being upgraded too including the WA22? Also, with the latest WA22 available, is there still a major difference in sound between balanced and RCA inputs?
 
Sep 30, 2015 at 6:41 AM Post #35,429 of 42,299
contrails said:
I see the upgraded WA5 on the woo website.  Are the rest of the amps being upgraded too including the WA22? Also, with the latest WA22 available, is there still a major difference in sound between balanced and RCA inputs?
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Don't hear a major difference just minor.
 
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