Woo Audio Amp Owner Unite
Sep 17, 2019 at 10:31 PM Post #40,666 of 42,298
I really like the Emission Labs rectifiers I am running. Their 300B is also excellent especially for the price. 90-95% of the Taks for 1/3 the price. IMO. They make a 5U4G and 274B rectifiers. I went with the 5U4G.

I felt the rectifier definitely changed the sound. Effected the size of the soundstage and speed of decay.

I have the WA33 and I'm running S EML 2A3's and wanted to buy their 5U4G to compare to my UE 596. I mentioned this to another member who also has the WA33 running the M EML 2A3's and their 5U4G. Just so happens we were both considering purchasing each others tubes blindly, so we decided to send each other our rectifiers mentioned to compare side by side for 1 week each.

Both of agreed 100% that the 596 had a bigger sound stage, more speed, clarity and detail. The 5U4G sounded
narrow, slow, darker and congested in comparison rison.Needless to say this saved me from buying the 5U4G, but he immediately bought the 596. I'm not saying that the 5U4G was bad, but nowhere near the performance of the 596 in our comparisons, or I would've definitely purchased it being I'm running EML's already.
 
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Sep 17, 2019 at 10:31 PM Post #40,667 of 42,298
I found some decent prices on EML tubes at tubeaudiostore.com and tubeusa.com. Woo makes beautiful amps but are on the High side for tubes.
 
Sep 17, 2019 at 10:38 PM Post #40,668 of 42,298
I tried a pair of USAF 596 in my WA5le and found that while they seemed faster the soundstage was definitely not bigger. They sounded more "digital" and less analog. I would agree they sound darker, which is what I enjoyed about them. Could depend on source, or difference between the WA33 and WA5. And everything is in the "ears" of the listener.
 
Sep 17, 2019 at 11:03 PM Post #40,669 of 42,298
I tried a pair of USAF 596 in my WA5le and found that while they seemed faster the soundstage was definitely not bigger. They sounded more "digital" and less analog. I would agree they sound darker, which is what I enjoyed about them. Could depend on source, or difference between the WA33 and WA5. And everything is in the "ears" of the listener.
Have u tried 422A?
 
Sep 18, 2019 at 12:03 AM Post #40,670 of 42,298
I'm really happy with the EML 274b in my WA6-SE. To me, it's a nice improvement over the Sophia Princess 274b and the EML blue glass 5U4G that I also own... Albeit for almost 3x the price.
 
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Sep 18, 2019 at 8:35 AM Post #40,671 of 42,298
Wanting to purchase a high end power cable for my newly ordered WA5 and want to keep it around USD$1000.00 ?


IMG_3438.JPG
 
Sep 18, 2019 at 3:06 PM Post #40,672 of 42,298
I have not tried 422A. How does it compare. Particular brand recommended?
 
Sep 20, 2019 at 5:45 PM Post #40,673 of 42,298
I tried a pair of USAF 596 in my WA5le and found that while they seemed faster the soundstage was definitely not bigger. They sounded more "digital" and less analog. I would agree they sound darker, which is what I enjoyed about them. Could depend on source, or difference between the WA33 and WA5. And everything is in the "ears" of the listener.
If you want the best of the best in your WE5le, I can highly recommend something like I have. Matched pair of Western Electric 300B made in 1956 and the same week in july, along with a matched pair of Tung Sol US Navy CTL 6SN7GT made in August 1942 and a matched pair of Emission Labs 5U4GM mesh plates.
 
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Sep 20, 2019 at 7:31 PM Post #40,675 of 42,298
If you want the best of the best in your WE5le, I can highly recommend something like I have. Matched pair of Western Electric 300B made in 1956 and the same week in july, along with a matched pair of Tung Sol US Navy CTL 6SN7GT made in August 1942 and a matched pair of Emission Labs 5U4GM mesh plates.

Thanks for such sound advice on 1940's things for my 2019 newly built amp..
 
Sep 21, 2019 at 6:10 PM Post #40,677 of 42,298
Hey guys

On my WA22 2nd gen

If I use:
Western Electric 421a or Tung Sol 5998 power tubes with ECC35 drivers, I get this moderately loud background hum from the left or right channel (it changes sides if I swap positions of either the power or driver tubes).

However if I use:
1) 6080 power tubes with the ECC35 drivers, it's completely silent background.
2) WE421A / TS 5998 with any non-ecc35 driver tubes, it's completely silent background.

I guess that means the amplifier only produces the hum when combining we421a/5998 with ecc35 tubes? Has anyone else had this issue?
 
Sep 21, 2019 at 6:37 PM Post #40,678 of 42,298
Hey guys

On my WA22 2nd gen

If I use:
Western Electric 421a or Tung Sol 5998 power tubes with ECC35 drivers, I get this moderately loud background hum from the left or right channel (it changes sides if I swap positions of either the power or driver tubes).

However if I use:
1) 6080 power tubes with the ECC35 drivers, it's completely silent background.
2) WE421A / TS 5998 with any non-ecc35 driver tubes, it's completely silent background.

I guess that means the amplifier only produces the hum when combining we421a/5998 with ecc35 tubes? Has anyone else had this issue?
Never have this problem with various 421/5998/ECC35 combination. Something is wrong with one of your tubes.
 
Sep 21, 2019 at 7:22 PM Post #40,679 of 42,298
Never have this problem with various 421/5998/ECC35 combination. Something is wrong with one of your tubes.

I have:
1 pair matched we421a
1 pair matched TS 5998
2 pairs of matched mullard ecc35

The hum comes with any combination of the above. Can it be I hit the jackpot and all pairs are faulty?

But when I use we421a/5998 with non ecc35 drivers, or when I used ecc35 drivers with non 421a/5998 power, I don't get the hum.
 
Sep 21, 2019 at 8:34 PM Post #40,680 of 42,298
I have:
1 pair matched we421a
1 pair matched TS 5998
2 pairs of matched mullard ecc35

The hum comes with any combination of the above. Can it be I hit the jackpot and all pairs are faulty?

But when I use we421a/5998 with non ecc35 drivers, or when I used ecc35 drivers with non 421a/5998 power, I don't get the hum.
ECC35 has higher mu.
 

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