[Thaddy]

My National Union 6SL7's arrived yesterday. I did get an email back from Mike @ Woo Audio stating that while the tubes are compatible, they aren't necessarily recommended. I've got them warming up in the amp with some music playing.

 

[VanHai]

Little brother welcomes big brother home.

 

[mab1376]

The Mighty 596 is thicker and meatier, but a bit slower. Think molasses vs. simple syrup. Both are bold and capable, but the KR 5U4G RK is just in another league.

If your budget allows, buy both and compare, then sell the one you don't like. Or keep them both, like I do, because I have an obsessive collection disorder.

The mighty one has landed.

Let that syrup run thick!

 

[VanHai]

The mighty one has landed.

Let that syrup run thick!

I think we have the same set of tubes.

 

[mab1376]

I think we have the same set of tubes.

Nice, those 6sn7 came stock and are pretty great!

 

[VanHai]

Nice, those 6sn7 came stock and are pretty great!

Indeed, they sound great!.

 

[jhljhl]

6f8g tubes for sale. Also, Raytheon RK60/1641 tubes with adapters.

 

[duranxv]

Generally, yes. But tomorrow I'll fire them back up and run some comparisons.

Any impressions so far on the 5u4g RK when it comes to dynamics and planars?

I tried contacting best300b twice explicity stating my interest in buying the 5u4g (but had some questions), but these guys never check their email supposedly... not a good sign.

 

[ColSaulTigh]

Any impressions so far on the 5u4g RK when it comes to dynamics and planars?

I tried contacting best300b twice explicity stating my interest in buying the 5u4g (but had some questions), but these guys never check their email supposedly... not a good sign.

I'm heading off to bed tonight, but I'll pop it in tomorrow and give it a run with my Focal Clear & Utopia, Sendy Peacock, Meze Empyreans, Meze Elites, and whatever else you want me to check out.

 

[VanHai]

Been searching the forums for combination of rectifier and power tube sets to go with a pair RCA 6F8G. Have tried USAF 596 & TS5998, Brimar 5Z4GY CV1863 KB/FE & TS5998, Mullard 5V4 GY & TS5998.

It was surprise that the smallest rectifier Mullard GZ30 &TS5998, just barely bigger than 6SN7 brought out the best synergy of all the combinations that i have tried. Sound stage, separations, vocals, base have opened up. If you have the Mullard GZ30, try it with the 6F8G and TS5998.

 

[mab1376]

Been searching the forums for combination of rectifier and power tube sets to go with a pair RCA 6F8G. Have tried USAF 596 & TS5998, Brimar 5Z4GY CV1863 KB/FE & TS5998, Mullard 5V4 GY & TS5998.

It was surprise that the smallest rectifier Mullard GZ30 &TS5998, just barely bigger than 6SN7 bring out the best synergy of all the combinations that i have tried. Sound stage, separations, vocals, base have opened up. If you have the Mullard GZ30, try it with the 6F8G and TS5998.

I have some Tung Sol 6F8G on the way, and while I have to wait a bit for Chinese adapters to come in, I have the 596, Sophia Mesh 274B, and 5Z4GY to try. Sadly I don't own any GZ30.

 

[VanHai]

I have some Tung Sol 6F8G on the way, and while I have to wait a bit for Chinese adapters to come in, I have the 596, Sophia Mesh 274B, and 5Z4GY to try. Sadly I don't own any GZ30.

They are very hard to find( GZ30), i have 2 pairs. I may spare 1 tube for you, when you needed. Let me know.

 

[mab1376]

I assume rare things don't come cheap, and after the 596 and 6F8G purchases, I should hold off spending for a little bit, appreciate the offer! If curiosity eats me up in the future I'll shoot you a PM (assuming it isn't gone!)

 

[u2u2]

They are very hard to find( GZ30), i have 2 pairs. I may spare 1 tube for you, when you needed. Let me know.

Good grief... a few short years ago these were dirt cheap and I grabbed a few from Langrex. Apparently the secret got out prior to these recent posts as they are now almost sold out and the price, relatively speaking, has gone over the moon. Not good as eye candy goes but they sound just fine on a wide range of tube combinations.

 

[VanHai]

Good grief... a few short years ago these were dirt cheap and I grabbed a few from Langrex. Apparently the secret got out prior to these recent posts as they are now almost sold out and the price, relatively speaking, has gone over the moon. Not good as eye candy goes but they sound just fine on a wide range of tube combinations.

You are right, i was lucky got 2 pairs at a decent price. Right now a seller from Vietnam is demanded for an enormous amount of $355.00 for a pair and that is ridiculous price.