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Little Dot Tube Amps: Vacuum Tube Rolling Guide - Page 351

post #5251 of 7673
Quote:
Originally Posted by mab1376 View Post
 

 

I'm sure you could always sell the one of the two you don't like, go for it!

 

Well mab, the offer of $100 wasn't accepted - thank goodness! Because it looks like the psvane CV181-T MKII could be a better bet, even though more expensive - by ex-Shuguang people.

Just plucking up courage to go the extra mile...oh what a tangled web we weave!! This tube-rolling game is SO addictive...

post #5252 of 7673
I did some research on the Siemens 6ak5w, and reading about the exact type I have, and listening to them, I think they're the best I've come across, and I'm in love what the little treasures I've come across! The best $40 pair I've ever come across! smily_headphones1.gif
post #5253 of 7673
Quote:
Originally Posted by spiderking31 View Post

I did some research on the Siemens 6ak5w, and reading about the exact type I have, and listening to them, I think they're the best I've come across, and I'm in love what the little treasures I've come across! The best $40 pair I've ever come across! smily_headphones1.gif

 

It would appear that you have not read the last 250 pages, or so, of this thread.... But in the end, all that matters is that you like them. Cheers. :)

post #5254 of 7673
Quote:
Originally Posted by gibosi View Post

It would appear that you have not read the last 250 pages, or so, of this thread.... But in the end, all that matters is that you like them. Cheers. smily_headphones1.gif
I would rather stick to the ef95 class tubes, but they're epic though! I must admit that though. They're pretty sweet! smily_headphones1.gif I could try other tubes, which I've tried a few others, but this is the sweet spot smily_headphones1.gif
post #5255 of 7673

Since we are talking about the older tubes we use to listen to i decided to sampled a pair a Mullard 8100 and a pair of 6DJ8 with homemade adapter. Started with the Mullard 8100 at first i was kind off surprised the sound is really detailed and bass is good but eventually i was focusing more on the highs and for me that was a bit to much  but they sound good . Now for the Amperex Bugle Boys. From the start i found those tubes to have a more balanced sound thruout also  warmer sounding in other words nothing sticks out  but detail is still there listening is relaxing imo  this is with Senns HD800 and Littledot mk3.                                                                                                                                                                                                                                                                                                                                                                                                                                                    

                                              

post #5256 of 7673
Quote:
Originally Posted by spiderking31 View Post


I would rather stick to the ef95 class tubes, but they're epic though! I must admit that though. They're pretty sweet! smily_headphones1.gif I could try other tubes, which I've tried a few others, but this is the sweet spot smily_headphones1.gif

 

Hi spiderking...you mentioned previously $40? OUCH!! As several 'old-timers' (sorry boys!) have advised, and which I was plugging for a long time, the tall-bottled 6HM5 was about the best straight replacement (ie EF95) we all found - mine were the Ei (Yugoslavian) tubes that TD posted a link for on 4th March and for which I had $5 offers accepted, with FREE delivery...do the maths! Sylvanias should also be good, depending where you are, but just compare prices with the tachonz link. You can't go wrong at these prices...NO fancy adapting needed!!

Give 'em a look...

 

Cheers

post #5257 of 7673
Quote:
Originally Posted by gibosi View Post
 

 

Actually, you don't have to build adapters, as you can buy them ready-made (the 6CG7 has the same pin-out as your DRs):

 

http://www.ebay.com/itm/1pc-6SN7-TO-6CG7-6FQ7-tube-adapter-for-you-amp-/191082280257?pt=US_Home_Audio_Amplifiers_Preamps&hash=item2c7d643541

 

While I do not have a smoked-glass Brimar 6SN7GT, I do have a Brimar 13D1 (which is essentially a 25SN7GT) and the Sylvania 6SN7GT referenced in this article, and while I think they are very good, I would not rate them among the very best. But of course, this is just one man's opinion based on old ears and modest gear. :)

 

So in my opinion, if you want "curvy" CV181s of similar quality to your DRs and C3gs , I think you should get "real" CV181s:

 

http://www.ebay.com/itm/Unique-NOS-Set-2-x-Mullard-Black-base-ECC32-CV-181-D-Getter-New-in-box-/191077832056?pt=Vintage_Electronics_R2&hash=item2c7d205578

 

On further reflection, g, your mention of ready-made adapters does actually make very good sense as I can give them a try before mutilating them - just in case! So thanks again for the link...

 

As I have already posted, I think I shall be going for the Psvane CV181-T MKII instead of the Shuguang - looks like they could just be a step up ...time will tell...

post #5258 of 7673
Quote:
Originally Posted by hypnos1 View Post
 

 

On further reflection, g, your mention of ready-made adapters does actually make very good sense as I can give them a try before mutilating them - just in case! So thanks again for the link...

 

As I have already posted, I think I shall be going for the Psvane CV181-T MKII instead of the Shuguang - looks like they could just be a step up ...time will tell...

 

And once you have these adapters, you can also try some of the old-stock 6SN7s. While not as pretty as the new Chinese versions, they usually cost less, and according to most accounts, sound better. That said, most of the observations out there regard the use of these tubes as drivers. Since you will be using the 6SN7 as output tubes, your goal would be to find the 6SN7 that has the best synergy with your C3gs. So my advice is try some cheap Sylvanias, Tung-Sols and/or RCAs to get a feel for how the 6SN7 plays with your C3s before spending the big bucks on a Psvane. 

 

Cheers. :)

post #5259 of 7673
Quote:
Originally Posted by gibosi View Post
 

 

And once you have these adapters, you can also try some of the old-stock 6SN7s. While not as pretty as the new Chinese versions, they usually cost less, and according to most accounts, sound better. That said, most of the observations out there regard the use of these tubes as drivers. Since you will be using the 6SN7 as output tubes, your goal would be to find the 6SN7 that has the best synergy with your C3gs. So my advice is try some cheap Sylvanias, Tung-Sols and/or RCAs to get a feel for how the 6SN7 plays with your C3s before spending the big bucks on a Psvane. 

 

Cheers. :)

 

Oh gee,g, - why do you have to give such good, sensible advice? Do you not realise I am TOTALLY infatuated?! (Which, of course, means totally besotted/illogical/insane!). So I'm afraid I can't promise to be a good boy and take it!

The crux/problem of the matter is that, as you said, there is a dearth of info re. their use (6SN7 generally) as POWER tubes...So this is all just a stab in the dark - hey, weren't there a couple of guys in the process of experimenting with same? WHERE ARE YOU? Help, please!

The dilemma also is that there could be quite a difference between what the usual 6SN7s do in their new role, compared to the Psvanes. Thus, I am of a mind to experiment with BOTH - in the name of our honour-bound duty to promote research in this hallowed thread (either that or I really AM just plain crazy). And as mab (optimistically?) said, I could always move them on - or try to at least...I really do have the bit between my teeth, don't I?

Not to mention the fact that usually I try to be ultra 'sensible', but which I am finding increasingly boring!! (Just be there to catch me if I fall, lol!...).

 

BTW...Can you remind me of your current favourites?

 

Thanks  :)

post #5260 of 7673

I have been trying a number 6SN7 as driver tubes with excellent results. Almost all the tubes I tried sound good, and some sound excellent. Current favorites are mid 60's RCA tubes with a thin heater wire horizontally across above the top mica, a '52 Sylvania GTA, and a Japanese Channelmaster rebranded tube.

 

These tubes are inexpensive and plentiful - wish somebody would compare them to the hyped up and overpriced exotics. Something tells me that these plebeian tubes will rate very well in comparison....

post #5261 of 7673

While I do not have the RCA or the Channelmaster, I do have the small-bottle, chrome-dome Sylvania 6SN7GTA. And yes, the chrome-dome compares very well as a driver tube to the Sylvania 6SN7W, which is my current favorite. However, I find the chrome-dome to be just a tad bit too dry and thin in the mid range compared to the 6SN7W.

 

That said, my hunch is that an output tube should be essentially neutral. And if not, I think it is better that it is too thin rather than too fat. For example, I have read that the Sylvania VT-231, which many find to be a bit too thin in the bass when used as a driver, is excellent as an output tube. Similarly, I would guess that the chrome dome might also be an excellent output tube, and they are cheap too.

post #5262 of 7673

Some time ago we compared various power tubes for the LD MKIII. 6N6P, 6N6Pi, 6N6P-IR and 6H30-DR. The last two were the best, the IR tube being a best buy. However, what distinguished one tube over another was the bass detail and punch, and nobody mentioned how neutral sounding the tube was.

post #5263 of 7673
Quote:
Originally Posted by mordy View Post
 

Some time ago we compared various power tubes for the LD MKIII. 6N6P, 6N6Pi, 6N6P-IR and 6H30-DR. The last two were the best, the IR tube being a best buy. However, what distinguished one tube over another was the bass detail and punch, and nobody mentioned how neutral sounding the tube was.

 

Using logic as the yardstick, having noticed so many different 'sounds' depending on the (many) drivers I have partnered with my DRs, I think it might be fair to assume that the latter remained throughout fairly neutral in the equation...but perhaps my logic is flawed?! I welcome any further comments...where on Earth are you, Audiofanboy - is there no internet in Japan?!!

post #5264 of 7673

To take this a bit further, if you are going to live with only one output tube, it would be optimal to have it be as neutral as possible, as this allows the sonic character of each driver tube to be revealed. And this is what makes the DRs very special as they do seem to be very neutral and transparent.

 

That said, the chance of a 6SN7, or any other double triode for that matter, being better than the DRs is likely very slim. But there is only one DR, whereas there are many, many 6SN7s. With so many to choose from, the selection of an output tube can be transformed into a rather different game, as the huge selection of 6SN7s offer the possibility of finding that one output tube which is the "perfect" match for a particular driver tube.

 

For example, the NU 6SN7GTs are typically quite bassy. Some have discovered that matching it with a 1940's Sylvania 6SN7GT, with it's thinner bass, but rather forward mids and highs is a great match. But for sure, rolling through many tubes in this manner take lots of time and money.

 

So in my opinion, to start, I would go for the most neutral 6SN7 I could find. And from my limited experience, I would start with a pair of Sylvania 6SN7GTAs or Tung-Sol "mouse ears".


Edited by gibosi - 3/7/14 at 2:23pm
post #5265 of 7673

How do i wire 6SN7 to 12AU7?I have a 9 pin socket and the 8 pin socket and Power Supply all i need is to wire them it's just i have no clue how to do it.

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