[Rossy007]

I just placed an order for -

NOS NIB Matched Pair Sylvania USA 6BE6 [5750] Gray Plate Vacuum Tube 6BE6 100%+

sorry, copied from ebay. I hope these are the right ones,  thanks gibosi for your advice.

 

[gibosi]

Quote:

I just placed an order for -

NOS NIB Matched Pair Sylvania USA 6BE6 [5750] Gray Plate Vacuum Tube 6BE6 100%+

sorry, copied from ebay. I hope these are the right ones,  thanks gibosi for your advice.

 
Yes, these Sylvania 5750/6BE6 are definitely the right ones. And once you have had a chance to audition them, I hope you will let us know what you think.
 
Cheers!

 

[Rossy007]

Absolutely, Thanks again.
 

 

[Rossy007]

Just got my Sylvania 5750\6BE6 and I am not sure about the jumper settings. I have only tried the stock tube. Can anyone tell me the settings?
Thanks
 

 

[Rossy007]

So tried to find what family these tubes belong to and all I could find was they possibly are EF92 and so as per the little dot guide, I followed the jumpers k1 & k2 to the side of 61j and j1 & j2 on. I must admit, I am having the worst luck with tubes. The first set,there was a buzz out of one of them and now these new ones I am having the same problem. Ignoring the buzzing, these are superb and give me exactly what I want in sound direct out from my CD player but the buzzing is making me regret getting this amp. Sorry...just frustrated

 

 

[gibosi]

Quote:

So tried to find what family these tubes belong to and all I could find was they possibly are EF92 and so as per the little dot guide, I followed the jumpers k1 & k2 to the side of 61j and j1 & j2 on. I must admit, I am having the worst luck with tubes. The first set,there was a buzz out of one of them and now these new ones I am having the same problem. Ignoring the buzzing, these are superb and give me exactly what I want in sound direct out from my CD player but the buzzing is making me regret getting this amp. Sorry...just frustrated

 

 
There is absolutely nothing wrong with your amp. These buzzing and humming noises are actually quite common with brand new tubes.
 
Again, as I have mentioned before, tubes do not sound their best right out of the box. They really do need to be burned in for a good 20 hours or so. And most of the time, the buzzes and humming quiet down and the sound usually improves as well. (However, these improvements are typically rather subtle).
 
I burn every set of tubes for at least 20 hours before making any decisions. So put them in and let them cook. I usually check on them every 4 or 5 hours, and of course, after 8 hours, per the Little Dot manual, turn the amp off for about 30 minutes, and then cook them for another 8 hours.
 
Otherwise, I am pleased that you like them.  
 
These are very unique tubes in that they can be used in either the EF95 setting or the EF92 setting. In the EF95 setting (grid number 3 is disconnected), the bass is stronger. In the EF92 setting (grid number 3 is strapped to the anode), the frequency spectrum is shifted a bit more to the mids and treble. I personally prefer the EF95 setting with these tubes.
 
So again, it is too soon to come to any conclusions. Burn them in.  And after 20 hours or so, let us know what you think.
 
Cheers

 

[Rossy007]

Sorry...just the little brat in me got let out for a second...thanks for all your help.......the Patience has begun

 

[tkoreaper]

I'm looking to get a pair of Mullard 8161 tubes for my red dot and have a few questions. I searched ebay and found a pair, but the listing says CV4024. Is there a difference between that and CV401? 
 
Also, I only skimmed through the first few pages of this thread and also looked at http://www.head-fi.org/t/563884/little-dot-tube-amps-vacuum-tube-rolling-guide#post_7625989 which both mention the Mullard 8161/CV401 to be the ideal tube... As you can probably notice both threads are pretty dated so I was wondering if anything has changed as far as another tube becoming more desirable.

 

[gibosi]

Quote:

I'm looking to get a pair of Mullard 8161 tubes for my red dot and have a few questions. I searched ebay and found a pair, but the listing says CV4024. Is there a difference between that and CV401? 
 
Also, I only skimmed through the first few pages of this thread and also looked at http://www.head-fi.org/t/563884/little-dot-tube-amps-vacuum-tube-rolling-guide#post_7625989 which both mention the Mullard 8161/CV401 to be the ideal tube... As you can probably notice both threads are pretty dated so I was wondering if anything has changed as far as another tube becoming more desirable.

 
Red Dot???  I assume you mean Little Dot?
 
Anyway, the CV4024 is not compatible with Little Dot amps. And I do not think you want a CV401 either. What I believe you want is either an M8161 or a CV4015. You might be able to find a CV131, but generally, CVXXX are older and not as good as CVXXXX. So I encourage you to search for the newer and better M8161, or even better yet, the CV4015.
 
I personally believe that the 6BE6 is a better sounding tube. The American premium version of the 6BE6 is the 5750. And if you would prefer the British CV version, that would be a CV4012.

 

[tkoreaper]

Quote:

 
Red Dot???  I assume you mean Little Dot?
 
Anyway, the CV4024 is not compatible with Little Dot amps. And I do not think you want a CV401 either. What I believe you want is either an M8161 or a CV4015. You might be able to find a CV131, but generally, CVXXX are older and not as good as CVXXXX. So I encourage you to search for the newer and better M8161, or even better yet, the CV4015.
 
I personally believe that the 6BE6 is a better sounding tube. The American premium version of the 6BE6 is the 5750. And if you would prefer the British CV version, that would be a CV4012.

Yeah, sorry I meant Little Dot (too much FPS games lol). I'm a little confused... If you look at the page I linked in my previous post you'll see "Mullard M8161/CV401". This makes me assume they are the same... forgive me as I'm new to all this. What confuses me is if I do a search for Mullard 8161 on ebay I get back results with different CVXXX variations, one of those being the CV4024 that I mentioned. So I'm a little confused as to what precisely I should be searching for... M8161 or CVXXXX?

 

[gibosi]

Quote:

Yeah, sorry I meant Little Dot (too much FPS games lol). I'm a little confused... If you look at the page I linked in my previous post you'll see "Mullard M8161/CV401". This makes me assume they are the same... forgive me as I'm new to all this. What confuses me is if I do a search for Mullard 8161 on ebay I get back results with different CVXXX variations, one of those being the CV4024 that I mentioned. So I'm a little confused as to what precisely I should be searching for... M8161 or CVXXXX?

 
The M8161 is the consumer version of this tube and the CV4015 is the British military version. The CV4015 is generally considered the best. However, it is my experience that military versions do not always sound better. However, they are more rugged and durable as these features are highly valued by the military. I have the CV4015, but not the M8161, so in this case, I just can't say.... Therefore, my best advice is to buy the CV4015 if you can find it at a good price. But if the CV4015 is too expensive, the M8161 for less money might very well be just as good. And it most certainly won't be bad.

 

[tkoreaper]

Quote:

 
The M8161 is the consumer version of this tube and the CV4015 is the British military version. The CV4015 is generally considered the best. However, it is my experience that military versions do not always sound better. However, they are more rugged and durable as these features are highly valued by the military. I have the CV4015, but not the M8161, so in this case, I just can't say.... Therefore, my best advice is to buy the CV4015 if you can find it at a good price. But if the CV4015 is too expensive, the M8161 for less money might very well be just as good. And it most certainly won't be bad.

Thanks for the help.

 

[Rossy007]

Quote:

 
Yes, these Sylvania 5750/6BE6 are definitely the right ones. And once you have had a chance to audition them, I hope you will let us know what you think.
 
Cheers!

 


So, After about a week, one of the tubes is still buzzing, just slightly so I have an option to have the vendor replace the buzzing one or both. I have about 70 hours into them and am not sure if I should wait another week or just get them replaced (the buzzing is very faint).
I have to say that gibosi was right on the money as far as them being warm and full with my Q701's but I still have to use one of the eq's on my ipod just to give it that extra "oomph".
I am looking into a dac to use with my laptop which may help but overall, VERY happy with these valves.

 

[gibosi]

The tube that's still buzzing might get better with more time, but after 70 hours, I think requesting replacements is more than justified.
 
Anyway, I am not at all surprised that you are "VERY happy" with these tubes.
 
In my opinion, the 6BE6 (and its sister tube, the 6BY6) are better than any EF91, EF92, EF95 or 408A you can find. And yes, I possess most of what are considered to be the best, including Mullard CV4010, Voskhod 6J1P-EV, Sylvania 408A with gold pins, Philips Miniwatt TS62 (408A) with gold pins, Mullard CV4015, GEC CV4014, and quite a few others.
 
I no longer listen to any of these tubes.....
 
Moreover, I have also tried a number of other non-traditional tubes that are compatible (that is, plug and play) with the LD including 6CB6, 6DK6, 6EW6, 6GM6, 6GY6 (EF92 setting for these 5 tubes) and 6J38P-EV (EF95 setting). In the end, the 6BE6 (EK90, 5760, CV4012) and the 6BY6 (E91H, 5915, 6687), are the best plug and play tubes I have tried to date.
 
Enjoy!

 

[mrlimbo]

Ive just done my first upgrade from the stock  6J1 tubes to the M8100 tubes , and theres no difference whatsoever ?? so that was a waste of time and money ,  are there any tubes that actually do improve/change the sound over stock tubes ?