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Analog Squared Paper Discussion and Appreciation Thread. - Page 15

post #211 of 3473
There are two sections on this amp, two tubes in the voltage gain section (1U4/T4) and two in the power section (3S4). I already had two RT's for the 3S4 stage so just needed two for the 1T4 stage.
Thank you for the compliment on the stand but if you really want to see furniture grade Andy did an amazing job on his and it quite rightly puts mine to shame!
http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/120#post_9155015

You are going to love tubes, I have not had so much fun in HiFi for years! Not only discovering the different sonic qualities but also learning so much history through researching the different brands, love it!
post #212 of 3473
Shikada san has just posted a customized version of the TU-05 on Facebook. There have been a couple of issues with the headphone, on/off switch not being as robust as it could be ( I had a slight issue with mine when I plugged a different 3.5mm jack in which pushed the metal retaining clip inside the switch so that the unit remained on. It was a simple fix with some needle nose pliers and has not happened again) .

So he has lengthened the chassis on this custom model by 30mm added a lockable 6.35 headphone jack and two RCA inputs and turned the gain switch into an on/off switch.
I know speaking with him he has been troubled by the sacrifice with aesthetics and I must say I prefer the look of the standard one more as it is much more in keeping with the Japanese simplicity of design philosophy but I don't think this custom one is too bad and I have a feeling it would look better in silver. Nothing else has changed about the amp so sonically it should be identical! Not sure of price or if this is going in production either.

I must admit given the option of this model or the original I would still go for the original for the reason I gave above.

Here is a picture from his FB page!*
post #213 of 3473

Now the question is just RCA jacks from Furutech or WBT

 

http://www.ebay.com/itm/WBT0210AG-ms-WBT-nextgen-signature-AG-RCA-socket-/400337903892

 

Looks like these guys might be OK for that case then, they're like 140 bucks a pair so most likely I'll go for them when I order TU-05 later.

 

wbt_66334.jpg

post #214 of 3473
For post number 3000 I thought I would share some thoughts on an all Radiotechnique tube set up!

I have had the normal spec 3S4's for a while now and they have been lovely sounding though took a back seat to the Marconi's and Mullards as they did not go as deep in terms of bass or stage depth. We are talking tiny amounts here and once past the analytical stage in truth these details would not be noticed. As I have said before, the differences between these top tier tubes are more about subtleties than huge AhHa moments (Telefunkens excepted which though have improved somewhat with burn in still sound dry to my ears!) so they are great tubes just not that extra gram of greatness.. Or so I thought!

Enter stage right the Mil-Spec Radiotechnique 1T4's. I now have at least twenty hours on these so they have gone past my normal amount for quoting sound quality. In truth with these there was not a lot of burn in needed.

Firstly, these are silent, like the other top tier tubes (other than the Marconi which tings but otherwise is silent) there is no noise with these. Just an inky black sonic background. And that background reveals something rather lovely with these. They have bass.. deep bass but not tarted up honda civic with bass bins bass. Just good, clean and seemingly endless bass. The sort of bass one gets by a discreetly used Subwoofer in a home system. Plugged in you would think it not there but unplug it and suddenly the music seems thin sounding, this is the Radiotechnique bass!

Mids,I think the perfect balance between creamy and neutral of all the tubes I have used in the 1T4 stage, just a slight amount more creaminess than my much loved Lorenz's which have a bit more of that Teutonic accuracy. Treble, well all the usual catch words, crystaline, sweet, detailed and like the bass seems to have no end. Now, once more. I must remind you here that these descriptions are anal retentive descriptions, one has to listen beyond how one enjoys music to hear these things, all of my top tier tubes would not leave you feeling wanting and replacing one with another would after the initial few moments render no difference in the end musical engagement and enjoyment, they are all that good!

I think though, what the Radiotechnique's bring to the table that only they alone bring is the wonderful sense of air and space around the instruments and even the notes played. I would describe them as "thoughtful" tubes, they allow one to digest the sonic space and what is occurring in it just that little bit more. Also, the siblings bring out the best in each other far more than say an all Mullard set up. The 1T4's add a greater sense of depth and ability to the 3S4's that I thought previously lacking a little.

I have put out some feelers to see if I can get some Mil-spec 3S4's and if I can will see what that does. Apparently in the Radiotechnique's case ( though it may be with other manufactures mil-spec tubes) there is an extra degree of quality control that goes into their manufacture (just as in tubes originally intended for medical use) which may explain the better sonic gifts gained.

Will this quest of tubes end for me? Well, 34 tubes in, personally I do not see it ending as it is so much fun for me, not only in discovering the differences sonically but also and for me equally important as a lover of history is the research and learning from collecting these tubes. I have learned so much over the past few months and the research has been so enjoyable. I have my eye on a pair of DL92's at the moment other than the Radiotechnique's, Selfishly I won't say what they are until the auction is over but I am rather excited about the prospect of winning them!

So there we go! My 3000 post celebrating my favourite topic on this forum, this amp and all the fun involved with tube rolling (Not sure what they call it in the UK, perhaps Valve Varoooming!).

Once again, for the few of us with this amp on this forum I would love it if other owners would chime in with their thoughts more as it would be lovely to hear if you agree or disagree with my thoughts on this amp. I always have one eye on this forum being of use to anyone researching equipment purchases and thus it would be so useful for them and enjoyable for me if other owners would contribute to the thread a bit more!!

As of this week after talking with Shikada san we have an exclusive little club, 19 owners worldwide and personally I think we are 19 of the luckiest people in Audio as we get to listen to a wonderful amp on a daily basis!

Have a great weekends music listening folks!


Edited by ianmedium - 5/11/13 at 8:29am
post #215 of 3473

ianmedium,

 

Your wonderfully evocative descriptions and infectious enthusiasm for tube rolling is a great service to owners of this superb headphone amplifier. I wholeheartedly applaud your generosity of spirit for sharing such invaluable information. THANK YOU. L3000.gif

 

Cheers,

Andy.

 

Quote:
Originally Posted by ianmedium View Post

For post number 3000 I thought I would share some thoughts on an all Radiotechnique tube set up!

I have had the normal spec 3S4's for a while now and they have been lovely sounding though took a back seat to the Marconi's and Mullards as they did not go as deep in terms of bass or stage depth. We are talking tiny amounts here and once past the analytical stage in truth these details would not be noticed. As I have said before, the differences between these top tier tubes are more about subtleties than huge AhHa moments (Telefunkens excepted which though have improved somewhat with burn in still sound dry to my ears!) so they are great tubes just not that extra gram of greatness.. Or so I thought!

Enter stage right the Mil-Spec Radiotechnique 1T4's. I now have at least twenty hours on these so they have gone past my normal amount for quoting sound quality. In truth with these there was not a lot of burn in needed.

Firstly, these are silent, like the other top tier tubes (other than the Marconi which tings but otherwise is silent) there is no noise with these. Just an inky black sonic background. And that background reveals something rather lovely with these. They have bass.. deep bass but not tarted up honda civic with bass bins bass. Just good, clean and seemingly endless bass. The sort of bass one gets by a discreetly used Subwoofer in a home system. Plugged in you would think it not there but unplug it and suddenly the music seems thin sounding, this is the Radiotechnique bass!

Mids,I think the perfect balance between creamy and neutral of all the tubes I have used in the 1T4 stage, just a slight amount more creaminess than my much loved Lorenz's which have a bit more of that Teutonic accuracy. Treble, well all the usual catch words, crystaline, sweet, detailed and like the bass seems to have no end. Now, once more. I must remind you here that these descriptions are anal retentive descriptions, one has to listen beyond how one enjoys music to hear these things, all of my top tier tubes would not leave you feeling wanting and replacing one with another would after the initial few moments render no difference in the end musical engagement and enjoyment, they are all that good!

I think though, what the Radiotechnique's bring to the table that only they alone bring is the wonderful sense of air and space around the instruments and even the notes played. I would describe them as "thoughtful" tubes, they allow one to digest the sonic space and what is occurring in it just that little bit more. Also, the siblings bring out the best in each other far more than say an all Mullard set up. The 1T4's add a greater sense of depth and ability to the 3S4's that I thought previously lacking a little.

I have put out some feelers to see if I can get some Mil-spec 3S4's and if I can will see what that does. Apparently in the Radiotechnique's case ( though it may be with other manufactures mil-spec tubes) there is an extra degree of quality control that goes into their manufacture (just as in tubes originally intended for medical use) which may explain the better sonic gifts gained.

Will this quest of tubes end for me? Well, 34 tubes in, personally I do not see it ending as it is so much fun for me, not only in discovering the differences sonically but also and for me equally important as a lover of history is the research and learning from collecting these tubes. I have learned so much over the past few months and the research has been so enjoyable. I have my eye on a pair of DL92's at the moment other than the Radiotechnique's, Selfishly I won't say what they are until the auction is over but I am rather excited about the prospect of winning them!

So there we go! My 3000 post celebrating my favourite topic on this forum, this amp and all the fun involved with tube rolling (Not sure what they call it in the UK, perhaps Valve Varoooming!).

Once again, for the few of us with this amp on this forum I would love it if other owners would chime in with their thoughts more as it would be lovely to hear if you agree or disagree with my thoughts on this amp. I always have one eye on this forum being of use to anyone researching equipment purchases and thus it would be so useful for them and enjoyable for me if other owners would contribute to the thread a bit more!!

As of this week after talking with Shikada san we have an exclusive little club, 19 owners worldwide and personally I think we are 19 of the luckiest people in Audio as we get to listen to a wonderful amp on a daily basis!

Have a great weekends music listening folks!

post #216 of 3473
Thanks you so much Andy, though you may not like me when I say this next thing!

It is around 4:30am here. I am up briefly as the auction for the two DL92's just ended and I won! Two NOS Phillips Miniwatt made in Holland valves will be winging their way to me as fast as the Royal Mail can carry them!

These tubes were made in their Dutch factory around the same time as the famed Amperex Bugle Boys which were made their also, so I am really looking forward to hearing them!

I was the only bidder and won them for £2!
post #217 of 3473
So this is what should be arriving on my doorstep in the next week or two!

Processed By eBay with ImageMagick, R1.1.1.M1

Can't wait to try this one out from the legendary Harleen works in Holland
post #218 of 3473

His web site was updated and looked so great

 

http://www.analog2p.com/index.html

 


 

Regarding the 12V charger, do you know its rated amperage as well as the size of DC connector?

post #219 of 3473
I really like the new site, thank you for posting it!
post #220 of 3473

Are you guys able to look inside the amp and check the brand/model of the capacitors? I was curious about what alternatives could be viable if someone were willing to pay even more than the costs of upgraded capacitors. Something nifty like Audio Note or Jensen would be ideal. Thanks guys.

post #221 of 3473
Here is the inside of mine with the upgraded caps, as far as I can make out they are Nichicon and I think they may be the Fine Gold series

CREATOR: gd-jpeg v1.0 (using IJG JPEG v62), default quality
Edited by ianmedium - 5/14/13 at 4:22pm
post #222 of 3473
I have just written to Shikada san asking these details so as soon as I know I will let you know the definitive answer! but here is a blow up of the section showing them if that helps!
AppleMark
Edited by ianmedium - 5/14/13 at 4:28pm
post #223 of 3473
And so I am drawn yet again back to my dream coupling.. Lorenz/Marconi. I do not know what it is, perhaps the slight edge in musicality or the small amount more of air in the acoustic, perhaps the slightly deeper but not wooly bass. The differences are so small one would hardly notice and yet I keep coming back to this pairing!

Of course, it being the nature of these things they happen to be also the rarest of rare. I have never seen the like for sale since getting mine but you can be sure I am keeping my beady eyes open just in case!
post #224 of 3473
Seeteeyou.

i just had a message from Shikada san detailing more about the capacitors he uses. He does not know the name of the upgraded volume pot as it is not made anymore but I personally would go for it if they are still available, best volume pot I have ever used, even at low volumes there is perfect channel balance.

Here is what he wrote me!

"In Hi-Q capacitor model, I use a KZ Electrolytic capacitor of the best grade of Nichicon of Japan. and I am using Type TME film capacitor of Shizuki the interstage coupling. Its response is excellent because low-induced Wrapping.
In addition,
Also power module, I Use the Panasonic's capacitor(105 degrees C) that high reliability for Automotive environment, it has a long life and excellent noise properties.
At Volime pot,
Sorry I do not know brand and in detail the manufacturer.
I chose from the product of a number, I found excellent volume with little degradation and deviation of sound left and right is least.
However, it is valuable because this has been discontinued.
Please introduce my good parts!"
post #225 of 3473

I start to be very excited about this little portable TUBE Amp.  tongue_smile.gif

 

 

 

- Indeed, I am the (very) happy owner of a Bellina HPA Tube-DAC/AMP from "Red wine audio", and I was looking for a more (trans)portable solution but... with the same warm signature. 

 

-> It looks like your amp will provide this similar "warm sound" ? isn’t it ?

 

 

- As a NON-Expert in Tube rolling, could you summarise your "years of experience" by just suggesting me the best overall tube upgrade over the stock tube.

 

 

- I really want to minimise the Hiss of the tube stage. I wank Black background when music is not playing. --> Is it possible with this amp ?  does some tubes rolling improve this ? 

 

 

- What super high-end/super clean source are you using guys ? 

 

- How long does the battery last ? 

 

- And... are they "silent" enough to drive sensitive cIEMs, and "powerfull" enough for my Fostex TH900 headphone ? 

 

 

 

 

 

thanks for your advices


Edited by bmichels - 5/18/13 at 8:05am
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