whirlwind
Headphoneus Supremus
I decided to be old and crazy. I ordered a Woo WA33 Elite Edition on BF.
Very nice....good luck with your tube search. Should sound killer with your headphones.
I decided to be old and crazy. I ordered a Woo WA33 Elite Edition on BF.
I have just gotten a pair of Bendix and think they sound great. I had been preferring 4x 6080 before and don't fancy my chances at getting 4x NOS Bendix 6080s!I think the Bendix are best if you don't have a pair I would give them a try! I tend to prefer other power tubes over 6080s though overall.
It is funny you mention this. I have the aforementioned 2x Bendix 6080s and was just yesterday wondering about pairing w/ 'other' (less expensive!) 6080s. I will give that a go based on your suggestion.You may consider mixing one pair of GEC with something different (and less expensive).
Until I purge my mains electrical demon, the 6080s tend to be least noisy overall. I haven't really been able to lean into the various "6 packs" for extended duration. The 6BL7s sound good, but respond poorly to the mains issue and are just noisy. The 6BX7s respond very poorly to the mains issue (I have a dozen or so, including ones that I know worked in another GOTL) and they really amplify the mains cycle. Getting my dedicated mains line in on 10th Dec and various other activities ongoing to defeat the mains demon! I do wish I had a clue why some valves responded more/ less to the mains irritation (on GOTL and FA Euforia too). Enough mains moaning ..I tend to prefer other power tubes over 6080s though overall.
Loving the GEC 6J5 ST driver pair with the Sylvania 6BL7 sextet and WE422A.
I do wish I had a clue why some valves responded more/ less to the mains irritation (on GOTL and FA Euforia too). Enough mains moaning ..
Quite reasonable thought for outputs. For inputs, I have an 6SL7 in which has a very high gain factor (?70) but is quiet. Perhaps the hum principally gets magnified in the outputs... that may be true. I'd need to consult my crazy experiment list to see what I have done in that space. Tx @OctavianHMaybe the Gain factor?
Here are some tube amplification factors for power tubes and the ones you mention to be the best seem to have the lowest gain factor:
6BL7 = 15
6BX7 = 10
5998 = 5
6AS7 / 6H13C / 6080 = 2
Was just going to say the same thing - tubes with higher gain amplify the signal more and accentuate noise. This is why 6080/6AS7 tubes may sound better in some situations - less amplification of noise and hum.Maybe the Gain factor?
Here are some tube amplification factors for power tubes and the ones you mention to be the best seem to have the lowest gain factor:
6BL7 = 15
6BX7 = 10
5998 = 5
6AS7 / 6H13C / 6080 = 2
There are a number of ways to configure gain stages in tubes, and I know more about some than others. In the case of the 6 x 6BX7 even though you have all those tubes they only represent a single gain stage. It's similar to the difference between wiring batteries in parallel vs. in series. Having 3 tubes in parallel allows improves the ability to drive the load by lowering output impedance and increasing the amount of current available, but each additional tube does not add any gain or (mu) in this scenario. The gain is 10 whether there is single 6BX7 or a dozen when wired in this fashion. There are others ways this could be configured which would give different results and can result in gain multiplying. So the 6SN7 starts you out with a gain or (mu) of 20 and the three paralleled 6BX7 on each channel all together multiply this existing value by it's own gain value which is 10, which gives us 20 x 10 = 200.
Thanks, sounds reasonable. However, using a driver tube that has a gain of 70 together with 6x6BL7 should equal 70x15=1050.I read here on this thread in the past about this and made a personal note in my own archives, and I think it was @Xcalibur255 who said:
I hope this clarifies a little bit.
Thanks, sounds reasonable. However, using a driver tube that has a gain of 70 together with 6x6BL7 should equal 70x15=1050.
This is five times more than your example of a 6SN7 and 6BX7 tubes with a gain of 200. I have tried such combinations, and even if it sounds louder, it is nowhere near 5 times louder so it must be a logarithmic scale of some kind.
And we still need to know how mixing output tubes of different gains affects the mu.
I have bought from Jac before and he is good to buy from. He is a part owner of EML, so you are kind of going right to the source when you buy those tubes from him. There is a US reseller called TubesUSA as well. No experience with them.Thanks for chiming in. EML is the way I am leaning after a lot of searching. The best price I have found so far with recommendations is JAC Music. Has anyone dealt with them? Good, bad or indifferent?
Thanks, sounds reasonable. However, using a driver tube that has a gain of 70 together with 6x6BL7 should equal 70x15=1050.
This is five times more than your example of a 6SN7 and 6BX7 tubes with a gain of 200. I have tried such combinations, and even if it sounds louder, it is nowhere near 5 times louder so it must be a logarithmic scale of some kind.
And we still need to know how mixing output tubes of different gains affects the mu.