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Balancing Act Tube Rolling - Page 8

post #106 of 320

Craig says it is fine to use ecc32, ecc35, and 6sl7. I prefer all of these over the 6sn7 varients.

post #107 of 320
Thread Starter 

I am using a nice TS 6SN7 BGRP all the time now so I can evaluate the different Power Tubes.

However I liked a lot the ECC32 and ECC33.

I think the Mullard will suit the musicality of the AVVT AV300B-SL-C37 a lot.

 

post #108 of 320

 

Quote:
I am using a nice TS 6SN7 BGRP all the time now so I can evaluate the different Power Tubes.

 

 

The tungsol bgrp is good for testing output tubes. It allows you to hear the differences that the output tubes  have because of its neutral and balanced presentation.

post #109 of 320
Thread Starter 

Pleased you agree KingStyles.

I can't roll driver, power tubes and rectifiers on the same amp at the same time.

I am trying to keep things simple!!!!!!

I roll my drivers on my SP amps keeping the Power Tubes constant.

post #110 of 320

I will do the same thing just like doing on SP, earmax, raptor, and Cary.

The input tube and driving tube play the main role in sound.

At the same time rolling the output tube is not cost-efficient at all even though we still need to figure out which one to stay with first.

I guess the BA drives the input tube  very hard. Do you guys feel specially hot on your 6SN7s?

 

Quote:
Originally Posted by rosgr63 View Post

Pleased you agree KingStyles.

I can't roll driver, power tubes and rectifiers on the same amp at the same time.

I am trying to keep things simple!!!!!!

I roll my drivers on my SP amps keeping the Power Tubes constant.



 

post #111 of 320
Thread Starter 

Edison I don't know how hard the 6SN7 is driven, but considering that the 300B on the BA will run at about 12 Watt it may not be that bad.

post #112 of 320

Any new recommendations on tube combinations for the Balancing Act?  Craig is assembling my unit now, and I have a whole array of driver tubes ready and waiting -- Osram B65, Mullard ECC32, Brimar ECC33 -- but no output tubes to speak of.  The KR PX4s sound like a good option, but may take months to arrive.  Thanks in advance....

 

Alex

post #113 of 320

With the kr px4, you may want to try the ecc35. I love that combo.

post #114 of 320

Thanks.  Anyone try the EML 300B Mesh?  

post #115 of 320
I use the regular EML 300B and i prefer them to the PX4 with the R10 and HD800.
post #116 of 320
Quote:
Originally Posted by jrisles View Post

Hi Guys

 

Just received the following batch of tubes as matched pairs. Although i know i don't need matched pairs for the BA you never know what might be my next purchase around the corner. Besides probably good to have a spare of each.

 

Would be keen to get some feedback about these in terms of ranking from 1 to 10 for performance for each tube.

 

 

SOVTEK 80’s Russian

60’s AUS made PHILIPS/MULLARD

Electro-Harmonix, NEW, Russian

Canadian G-E

TUNG-SOL , USA 50’s tri-plate “Tall Boy”

GENERAL-ELECTRIC 6SN7GTB, USA 60’s

WESTINGHOUSE USA 60’s

KEN-RAD (Kentucky-Radio) USA, 50’s, black glass, staggered plates

SYLVANIA “VT231” 1940’s USA

BRIMAR, UK, 70’s, “CV1988” brown base, black glass

BRIMAR, UK, 50’s, 6SN7GT, clear glass

RCA ,USA, 60’s, “5692” Red base

TUNG-SOL ,50’s, USA, Round plates

MULLARD UK, 50’s, “CV181/ECC32” Coke bottle shape, quite tall, smokey glass, brown base


I have to say of this list above the Ken-Rad is definitely rating very highly when comboe'd with the KR PX4. A great combination that is for sure. Half the price of a Tung-Sol and a quarter of the price of a ECC32 Mullard but definitely not half or quarter the value = that is for sure. A sleeper if you ask me.

 

post #117 of 320
Thread Starter 

 

Quote:
Originally Posted by takey2001 View Post

Thanks.  Anyone try the EML 300B Mesh?  



The EML 300B Mesh may not be compatible with the BA.

post #118 of 320
Craig said they most likely will work fine. I'll report back when I have the BA and EMLs in hand.
post #119 of 320
Thread Starter 

Just be careful as they are not a direct replacement for the 300B.

post #120 of 320

Thanks.  If I may ask, what are the risks and, more importantly, how would I mitigate them?

 

Separately, has anyone replaced the stock 6X4 rectifier tubes?  Are there any benefits to doing so?  NOS 6X4s appear to be comparatively cheap.

 

 

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