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Analog Squared Paper Discussion and Appreciation Thread. - Page 26

post #376 of 3488
Quote:
Originally Posted by GermanGuy View Post

Sometimes something is that simple that i don't think of it.

I have just sent an email to the itt schaub lorenz deutschland gmbh customer support to ask
- if they have lorenz df91 to sell
- i would need about 20 of them (urgent)
- if they know a source for
- have produced the same tube with / for other labels / companies.

 

Quote:
Originally Posted by ianmedium View Post


Oh that is great! Lets see if they have some gathering dust in some dark corner of a wear house somewhere as I think this type of tube ceased being manufactured some time in the late 1960's

Thank you so much for all the time and effort you are going to to source us some great tubes!

 

+1

 

Whoaa... This is awesome...!

Thanks guys... beerchug.gif

post #377 of 3488

I am about to join the gang...having just made enquiries to Shikada-san regarding the TU-05.

 

A few questions if anyone can help?

 

My intentions are to use the TU-05 primarily with IEMs and low gain setting seems most appropriate? However, I am very interested in using this amp with the Spiral Ears SE5 which are 130 ohm+/-? Any compatibility issues? And how quiet is this amp with IEMs?

 

I have just checked all the upgrade options, and is this the route to take?

 

TU-05 and the PF-IX in particular, is what I am looking forward to savouringbigsmile_face.gif

 

Thanks to everyone, especially Ian and Anakchan

post #378 of 3488
Oh yay! Wonderful.

I predict your going to love this amp with the PF's, just a match made in heaven I feel!

As to the compatibility, Shikada San offers the option of two gain settings out of the three offered 8~32/16~64/32~200 So looking at what you need I would say go for the low and high gain options.

In my experience with the FAD Heaven S/ PF's I have heard no hiss with better quality tubes. The stock ones though sound good are I find a little noisy. Once music is playing it is not heard though in my experience.

The most silent tubes I have used to date are Siemens, Lorenz, Phillips and Radiotechnique which are absolutely silent.. However they are all NOS so it can be a bit of a crap shoot. The cheapest tubes I have purchased so far are the quietest so price is not that much of an indicator.

Mullards are pretty quiet as well and I have found with a good number of hours on them most quiet down.

The upgraded volume pot is a must I feel, simply the best pot I have used and even at the lowest volume no channel imbalance is to be found.

If your going to use your amp near a computer or cell phone I recommend the metal tube guards as they cut out all the electronic interference.

Other than that make sure your getting the separate on/off switch and headphone socket. I have a feeling he is doing that as standard as the combined one was a weak spot but double check with him to make sure.

I am really excited for you, the PF's are just magnificent with this amp, the soundstage is incredible as is depth and the way the amp pin points all the instruments in the sound stage, something the PF's excel at I feel and this amp shows that even more!
post #379 of 3488
Quote:
Originally Posted by ianmedium View Post

Oh yay! Wonderful.
Warning: Spoiler! (Click to show)

 



I predict your going to love this amp with the PF's, just a match made in heaven I feel!

As to the compatibility, Shikada San offers the option of two gain settings out of the three offered 8~32/16~64/32~200 So looking at what you need I would say go for the low and high gain options.

In my experience with the FAD Heaven S/ PF's I have heard no hiss with better quality tubes. The stock ones though sound good are I find a little noisy. Once music is playing it is not heard though in my experience.

The most silent tubes I have used to date are Siemens, Lorenz, Phillips and Radiotechnique which are absolutely silent.. However they are all NOS so it can be a bit of a crap shoot. The cheapest tubes I have purchased so far are the quietest so price is not that much of an indicator.

Mullards are pretty quiet as well and I have found with a good number of hours on them most quiet down.

The upgraded volume pot is a must I feel, simply the best pot I have used and even at the lowest volume no channel imbalance is to be found.

If your going to use your amp near a computer or cell phone I recommend the metal tube guards as they cut out all the electronic interference.

Other than that make sure your getting the separate on/off switch and headphone socket. I have a feeling he is doing that as standard as the combined one was a weak spot but double check with him to make sure.

I am really excited for you, the PF's are just magnificent with this amp, the soundstage is incredible as is depth and the way the amp pin points all the instruments in the sound stage, something the PF's excel at I feel and this amp shows that even more!

 

 

 

Thanks Ian

 

I knew you would come in and save the day...

 

Ahh there are two options for the gain setting, I thought it was 1 of 3...fantastic!!! Yes that will be the best solution!

 

I have all the options checked, and there are many Tube stores in Hong Kong, although I will need to research more on prices...

pretty clueless. 

 

Cheers again!


Edited by spkrs01 - 6/12/13 at 10:46pm
post #380 of 3488
Any help you need on tubes just ask. I have purchased 40 since February and whilst not an expert I have a little idea of what works with the amp.

To help me help you with this it would be useful to know how you like your music presented and what sort of music you listen to. That way I can suggest tube combinations that would work the best for your needs.

Oh, and this is one of the joys of the tubes used in this amp. The most expensive I have paid is $16 for one tube but most average out between $3-$10, usually around the $7 mark so these tubes are cheap. Oh, and all of them have been NOS, NIB and all but two pairs have been tested.
Edited by ianmedium - 6/12/13 at 10:39pm
post #381 of 3488

Ian

 

Is there a generic name for the Tubes used in the TU-05?

 

So I am actually looking for the right type?

 

Thanks

post #382 of 3488
Yes, there are two types used, one pair for the voltage gain stage and another pair for the power stage.

Below is a cut and paste of the write up I did on the various tube names used, it was a ways back so it is always useful to post it in the thread to keep it near the top, hope it helps.


"So, for the Voltage Gain stage we need either 1U4 or 1T4 tubes. The 1U4 are predominantly US made tubes, I have not seen any European tubes with that designation. The only difference between 1U4 and 1T4 is that the 1T4's use a little bit more power.

I have found the difference to be 2 notches on the potentiometer difference.

Now, the 1T4's have several designations depending on where in the world they were made. Generally 1T4 is a US designation though it is seen on European made tubes that were exported to the US.

The various designations for the 1T4 are: DF91/CV1971 and less common.. W17/1K2

For the power stage there is only one choice.. 3S4 which is also known as: DL92/CV820 and less common.. VT-174/N17/2P2/CV484"
post #383 of 3488

ianmedium,

 

40 since February?!? No wonder I can't find any Lorenz tubes, you've bagged the entire world supply! Just kidding. wink_face.gif

 

Tube collecting and rolling is addictive. As it's inexpensive, easy to do and very rewarding. There's something magical about using a component that was originally manufactured decades ago. Pin cleaning is very cathartic too, it's a quiet moment of introspection before inserting the tubes and firing up the amplifier. 

 

Cheers,

Andy. 

 

Quote:
Originally Posted by ianmedium View Post

Any help you need on tubes just ask. I have purchased 40 since February and whilst not an expert I have a little idea of what works with the amp.

To help me help you with this it would be useful to know how you like your music presented and what sort of music you listen to. That way I can suggest tube combinations that would work the best for your needs.

Oh, and this is one of the joys of the tubes used in this amp. The most expensive I have paid is $16 for one tube but most average out between $3-$10, usually around the $7 mark so these tubes are cheap. Oh, and all of them have been NOS, NIB and all but two pairs have been tested.
post #384 of 3488
Quote:
Originally Posted by ianmedium View Post

Yes, there are two types used, one pair for the voltage gain stage and another pair for the power stage.

Below is a cut and paste of the write up I did on the various tube names used, it was a ways back so it is always useful to post it in the thread to keep it near the top, hope it helps.


"So, for the Voltage Gain stage we need either 1U4 or 1T4 tubes. The 1U4 are predominantly US made tubes, I have not seen any European tubes with that designation. The only difference between 1U4 and 1T4 is that the 1T4's use a little bit more power.
 

 

There were TUNGSRAM 1U4 to buy on ebay ! is this a european brand ?

 

Also posted on a compatibility list (conrad.co.uk):

 

- Tube DF91 = 1T4 = W17 = 1K2 = 1K3


Edited by GermanGuy - 6/13/13 at 3:46am
post #385 of 3488

Thanks again Ian.....

 

I will start visiting shops here and familiarizing myself with TUBESnormal_smile%20.gif 

post #386 of 3488

Just Paid earlier today for my order...now the wait and tubes researchnormal_smile%20.gif

 

I may buy the TU-06 too.............................

post #387 of 3488
Specs for TUR-06 is out on their page (was blank a few days ago). I've ordered TUR-06 for myself & secured serial #3 for me. I have no idea who had serial #1 & #2 :-(.
post #388 of 3488
Quote:
Originally Posted by AnakChan View Post

Specs for TUR-06 is out on their page (was blank a few days ago). I've ordered TUR-06 for myself & secured serial #3 for me. I have no idea who had serial #1 & #2 :-(.

Don't be sad, #3 is nice.  #1 is his, and someone blew up #2.........wink.gif

post #389 of 3488
Quote:
Originally Posted by GermanGuy View Post

Sometimes something is that simple that i don't think of it.

I have just sent an email to the itt schaub lorenz deutschland gmbh customer support to ask
- if they have lorenz df91 to sell
- i would need about 20 of them (urgent)
- if they know a source for
- have produced the same tube with / for other labels / companies.

got an email response von "Raab karcher company" , but  just  "sorry we only bought schaub lorenz, but we know nothing" confused.gifeek.gifmad.gif

 

Have to try to get somebody on the telephone there !


Edited by GermanGuy - 6/14/13 at 4:28am
post #390 of 3488

Anyone interested ? One DF91 Lorenz !!!!! Maybe there are more sets to buy !!!! (Euro 19.90 per set)

 

http://www.ebay.de/itm/NEW-DK91-DK92-DF91-LORENZ-NOS-SEALED-BOXES/221239951861?_trksid=p5197.m1992&_trkparms=aid%3D111000%26algo%3DREC.CURRENT%26ao%3D1%26asc%3D14%26meid%3D8369507361752732258%26pid%3D100015%26prg%3D1006%26rk%3D1%26sd%3D221239951861%26#ht_459wt_800



Just had a very detailed telephone conversation with the shop owner of the link above:

So as a summary (ianmedium you are the lucky guy) lorenz stopped own production of tubes in a very early stage of selling them, instead rebranded and sold tubes where most of them were made in the united states. He mentioned for example the companies silvania, tungsol, general electric.

Before he buys any lorenz tubes, he checks pictures and codes of them to be sure of the origin.

So it's like playing russian roulette what you get.

But besides the set on ebay he has no lorenz df91, maybe one can understand now. One of the first sentences when calling me back was 'why the hell do you want especially lorenz?'

Maybe we should start looking for Usa made tubes?

The only company producing tubes in their own factory until near the end was telefunken, while a lot of siemens tubes are rebranded soviet tubes or from jugoslavia, Hungary or tschecheslovakia.
Edited by GermanGuy - 6/14/13 at 8:20am
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