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Woo Audio Amp Owner Unite - Page 1955

post #29311 of 39044
I actually like the 6DJ8 Amperex orange globes from Holland a lot....the A frames. Also like rocket logo 6n1p, but not as much as the Amperex.
7236 is excellent and helps lower the output impedance making for a better low end match for lower-ish impedance phones. I prefer the TungSol (box plates) over the Sylvamia.

Quote:
Originally Posted by 62ohm View Post

Can anyone recommend me good drive tubes for WA3 that don't cost more than $200 USD a pair? cheaper option is preferable. Also I plan to get the Tung Sol 7236 Nos as it is recommended by Woo, is that a good plan? Thanks in advance.
post #29312 of 39044
Cant go wrong with a frames. Lovely tubes
post #29313 of 39044
Quote:
Originally Posted by 62ohm View Post
 

Can anyone recommend me good drive tubes for WA3 that don't cost more than $200 USD a pair? cheaper option is preferable. Also I plan to get the Tung Sol 7236 Nos as it is recommended by Woo, is that a good plan? Thanks in advance.

 

Anyone?

post #29314 of 39044
Quote:
Originally Posted by Frank I View Post
 

The tubes should not buzz. The problem when you buy on Ebay is unless you have  a tester it is always a crap shoot unless your buying from seller with lots of positive feedback and a good return policy. The WA22 I have here is dead silent and I been swapping tubes from my collection and there is no noise. Do you have an issue with all rectifier?   What are the tubes you are using that are causing the issues?  Run that by me and lets see if we can get to the problem and help you correct it.


Hi Frank,

The power tube that hums is a Tungsol 5998 that was bought as 1/2 of a matched pair. I purchased them from a dealer that is commonly recommended on this forum. It arrived with glass rattling around inside it but when I called the dealer they said that was common and shouldn't be a problem. The dealer has a one month warranty. The tube started to hum 5 weeks after I received it and the dealer offered to sell me another one at the same price. The other tubes were purchased from dealers on EBay with 1,0000+ 100% feedback. The drivers are Sylvania 6SN7GT's that were bought as a set and both hum. I also have two Western Electric 422A's that hum. The drivers and power tube can barely be heard as long as I keep the power switch on low but the 422A's are pretty noticeable even on low until there is music playing. I don't care about the 5998 as I have two other pairs that are completely quiet. I also have two pairs of Sylvania Brown Base 6SN7WGTA's that are completely quiet that I prefer sonically to the other Sylvania drivers anyway. What I do care about are the WE422A's. Everything Dubstep Girl has written about them is true. I just love that tube but I don't want to buy another one if I'm going to end up with the same hum. They both came in mint condition with shiny pins and factory boxes. Someplace I have the test results listed in the ad but have no way to test them myself. It's past time to return them if that's what I should have done to begin with. Live and learn if that's the case. I recently bought a really nice set of GEC 6AS7G's from Dubstep Girl but she didn't advertise her WE422A so I'm in the market if anyone can suggest a reliable source. Or preferably a fix for the one's I already have.

post #29315 of 39044
Quote:
Originally Posted by GrindingThud View Post

I actually like the 6DJ8 Amperex orange globes from Holland a lot....the A frames. Also like rocket logo 6n1p, but not as much as the Amperex.
7236 is excellent and helps lower the output impedance making for a better low end match for lower-ish impedance phones. I prefer the TungSol (box plates) over the Sylvamia.

 

Hi mate, thanks for the recommendation, looks like a solid option.

 

Also, I found these 2 Tung Sol 6080 on ebay, are these the same as the one recommended by Woo? It costs much less, so I'm a bit sceptical...

 

http://www.ebay.com/itm/Tung-Sol-6080-Electron-Aduio-Tube-Socket-with-Original-Box-Vintage-3226318-308-/291056703716?pt=Vintage_Electronics_R2&hash=item43c454d8e4

 

http://www.ebay.com/itm/Vintage-Tung-Sol-USA-6080-6AS7GA-Black-Plate-3-Mica-S-Rods-Vacuum-Tube-88-105-/121243060937?pt=Vintage_Electronics_R2&hash=item1c3aa64ac9

post #29316 of 39044
Those are 6080 not 7236. The 7236 are harder to find and carry a higher price tag. For 6080, the TungSol ones with the metal mica holders like you pictured are amongst the better 6080s.
Quote:
Originally Posted by 62ohm View Post

Hi mate, thanks for the recommendation, looks like a solid option.

Also, I found these 2 Tung Sol 6080 on ebay, are these the same as the one recommended by Woo? It costs much less, so I'm a bit sceptical...

http://www.ebay.com/itm/Tung-Sol-6080-Electron-Aduio-Tube-Socket-with-Original-Box-Vintage-3226318-308-/291056703716?pt=Vintage_Electronics_R2&hash=item43c454d8e4

http://www.ebay.com/itm/Vintage-Tung-Sol-USA-6080-6AS7GA-Black-Plate-3-Mica-S-Rods-Vacuum-Tube-88-105-/121243060937?pt=Vintage_Electronics_R2&hash=item1c3aa64ac9
post #29317 of 39044
Quote:
Originally Posted by GrindingThud View Post

Those are 6080 not 7236. The 7236 are harder to find and carry a higher price tag. For 6080, the TungSol ones with the metal mica holders like you pictured are amongst the better 6080s.

 

So it would still be an upgrade over the stock tubes, but not as good as the 7236 sold by Woo?

post #29318 of 39044
Good is a relative term...as is upgrade. Other than how quiet the tubes are (ideally they should be silent), you won't hear significant differences across the 6080 tubes, with maybe exception of the bendix graphite plate types which many (including me) say have a better sound stage. What's good about the 7236 (and 5998) is it lowers output impedance of the amp and gets a little more thud into lower impedance phones. I think you have high impedance headphones (HD800?)...so I'll have to defer to someone with those to say if they prefer 7236, 5998, or 6080 for them.
Quote:
Originally Posted by 62ohm View Post

So it would still be an upgrade over the stock tubes, but not as good as the 7236 sold by Woo?
post #29319 of 39044
Quote:
Originally Posted by GrindingThud View Post

Good is a relative term...as is upgrade. Other than how quiet the tubes are (ideally they should be silent), you won't hear significant differences across the 6080 tubes, with maybe exception of the bendix graphite plate types which many (including me) say have a better sound stage. What's good about the 7236 (and 5998) is it lowers output impedance of the amp and gets a little more thud into lower impedance phones. I think you have high impedance headphones (HD800?)...so I'll have to defer to someone with those to say if they prefer 7236, 5998, or 6080 for them.

 

rofl I guess tube rolling is not as simple as I first thought it would be :p

post #29320 of 39044
Quote:
Originally Posted by daverich4 View Post
 


Hi Frank,

The power tube that hums is a Tungsol 5998 that was bought as 1/2 of a matched pair. I purchased them from a dealer that is commonly recommended on this forum. It arrived with glass rattling around inside it but when I called the dealer they said that was common and shouldn't be a problem. The dealer has a one month warranty. The tube started to hum 5 weeks after I received it and the dealer offered to sell me another one at the same price. The other tubes were purchased from dealers on EBay with 1,0000+ 100% feedback. The drivers are Sylvania 6SN7GT's that were bought as a set and both hum. I also have two Western Electric 422A's that hum. The drivers and power tube can barely be heard as long as I keep the power switch on low but the 422A's are pretty noticeable even on low until there is music playing. I don't care about the 5998 as I have two other pairs that are completely quiet. I also have two pairs of Sylvania Brown Base 6SN7WGTA's that are completely quiet that I prefer sonically to the other Sylvania drivers anyway. What I do care about are the WE422A's. Everything Dubstep Girl has written about them is true. I just love that tube but I don't want to buy another one if I'm going to end up with the same hum. They both came in mint condition with shiny pins and factory boxes. Someplace I have the test results listed in the ad but have no way to test them myself. It's past time to return them if that's what I should have done to begin with. Live and learn if that's the case. I recently bought a really nice set of GEC 6AS7G's from Dubstep Girl but she didn't advertise her WE422A so I'm in the market if anyone can suggest a reliable source. Or preferably a fix for the one's I already have.

Dave I find it interesting that some tubes are completely quiet while other  hum I was going to suggest trying a cheater plug in the outlet to see if that eliminates the humming issue and you may want to try that anyway. I am not familiar with using the 422A  now would I know anyone even to recommend to get them from. I just changed the rectifier in the Wa 22 to the Princess 274B and using the sylvania 67n7GT tubes plus the upgraded tungol 7236 and it dead quiet and was with the stock tubes as well.

 

Weird one of your issue are with certain types of tubes other than rectifiers and also with rectifiers yet others are dead silent. I would try to see if you can use a cheater plug or power conditioner to see if that will help you eliminate the issue. Hum is usually the result of the tube and sometimes a low level hum can come from transformers as well but since you are getting quite response with certain tubes its telling me the tube are part of the issue or sometime using a cheater plug will help eliminate the hum.

 

Let me know if you try the cheater plug and see if that helps first.

post #29321 of 39044
This thread is worth a read:
http://www.bottlehead.com/smf/index.php/topic,3453.msg30393.html#msg30393
Quote:
Originally Posted by 62ohm View Post

rofl I guess tube rolling is not as simple as I first thought it would be tongue.gif
post #29322 of 39044

Hi Frank, the seller contacted me and is going to give me a new set of tubes on Friday.

I know I keep thanking you but…Thank you again for all of your support!!!

post #29323 of 39044

Great new Joseph. if you need anything else just shout out to me . 

post #29324 of 39044

post #29325 of 39044

^ can't let you be all alone.  I just threw away 2 ken rad VT231.  Out of 4 from ebay, only 2 are good.  Unfortunately, the bad 2 developed problems weeks after purchase.  :(

Still, they are my fav driver tubes so far. :beerchug: Thx again for recommending Woo to me.

 

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