GE 6L6GC bs RCA

truth depends on your vendor, your gear and your ear..i have a mix of new and nos. My 6L6 in a very heavily modified MC240 are Sylvania.

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Is that a Samra 240, tomic601? The new Tung Sol sure sound good in his Russian PIO rebuilds.

Telefunken and RCA/Tung-Sol in a MC240/MX110z has a full blown cult following... Truly one of the Holy Grails of the stereo world.. 225 and 275s are in a close second..

I just tried Sovtek 6L6WXT, they use them in Migs, they are that tough.. THICK black plate....Quiet...
Try them, you'll be surprised, Amperex small valves smooth combo..

I’m listening to a MX110z a 225 and a pair of RS4b right now. There isn’t a part there under 50 years old.. LOL The surrounds.. and 2 PS rebuilds.

FM is as clear as a bell.. The station is 53 miles away.

70 degree autumn night. It is as dry as the Mojave desert here.

They just played "Anna Gotta Devita" and "Born to be Wild"

I think I’ll watch Easy Ryder, LOL

Interesting vintage amp. Lot of buttons and circuitry. I wonder if it all colors the sound or limits its transparency.  I've no experience of the Philips 7581A but the TSol gets very good feedback on agon.

@noromance 

“I have a quad of the coveted RCA black plates from the 60s. Cost me a bunch. New Tung Sol 7581A walk all over them for 1/3 of the price.”

Most interesting ... and would tend to run counter to modern production Vs Vintage I shall take a look at them,  thanks for the heads up.

For my part I tend to run NOS JAN Philips 7581A’s as weapon of choice in a couple of my 6L6GC amplifiers, I am listening to just such an example as I type ... 

SANSUI AU-111 circa 1967.

I answered that above.  Tung Sol 7581A.

Any thoughts on which tubes would add some weight to the music?

Thanks for all the insight.
So what tube type would add some weight or substance to the music?

I agree that new production tubes are getting better, but old stock tubes still sound better in my experience. This is particularly true of preamp tubes.

truth depends on your vendor, your gear and your ear..i have a mix of new and nos. My 6L6 in a very heavily modified MC240 are Sylvania….but like @noromance i have an open mind….and ear….

I get tubes from only a few places, very reputable..Andy at Vintage tubes and RAM.

best to you on your musical journey 

Not all hype - but new tubes are better than they were.

Its surprising to hear your collective comments on some of the Tung Sol re-issues and the Genelax.  Makes me wonder if the NOS craze is all hype.

used as driver tubes on Wavac Ec300b in front of EAT and Takatsuki 300b. The KT66 works best with EAT, the Sylvania Winged-C best with the latter

for what application??

One other strong performer is the Tungsol KT66. It draws filament power in accordance with 6L6 spec, has the heavy KT66 glass and gives a great sound: mellow, articulated bass and sweet treble.

If you can run them Golden Lyon KT66, is a pretty good valve. 

Unless you have a good set of RCAs Most are gone. I have two sets of Mcintosh RCAs 6L6s very VERY special.

I have a quad of Telefunken EL34s VERY special..

GL KT66, I was impressed.. re-issue Tung Sol 7581, reminds me of the old RCA BP. My Carys sure like them..

I have a quad of the coveted RCA black plates from the 60s. Cost me a bunch. New Tung Sol 7581A walk all over them for 1/3 of the price.

I ran a GE NOS 6l6gc against JAN Philips 7581a cryo and Svetlana Winged-C cryo. It was no comparison and ever since I save the money on NOS tubes