or Connect
Head-Fi.org › Forums › Equipment Forums › Portable Headphone Amps › Analog Squared Paper Discussion Thread.
New Posts  All Forums:Forum Nav:

Analog Squared Paper Discussion Thread. - Page 148

post #2206 of 3704
Of course a cheaper option that gives flexibility is to have a high quality 6.3mm-3.5mm cable adaptor made. Cardas make a good one. I used it and found no difference in the sound quality with it in or out of the equation. If you have custom cable with your headphones you could always ask the cable maker to make you a short length adaptor. That is the route I would go. Personally I like to stay as close to the original ethos of the amp as possible, but that is just me. As you can see there have been some amazing modifications made by GG that make him very happy indeed.
post #2207 of 3704
Quote:
Originally Posted by ianmedium View Post

Of course a cheaper option that gives flexibility is to have a high quality 6.3mm-3.5mm cable adaptor made. Cardas make a good one. I used it and found no difference in the sound quality with it in or out of the equation. If you have custom cable with your headphones you could always ask the cable maker to make you a short length adaptor. That is the route I would go. Personally I like to stay as close to the original ethos of the amp as possible, but that is just me. As you can see there have been some amazing modifications made by GG that make him very happy indeed.

 

I think I will just stick with the 3.5mm output now. The reason I asked for 6.3, was because I had a dhc ultashort adapter (trrs to 6.3) being made for me, but just simply requested a change so now its trrs to 3.5mm On the go, I will use nt6 pro with the hm901 balanced and then when I can sit down ill use the hm901 with the tu-05 with the nt6 pro. Ianmedium, do you know if the tu-05 would pair well with brighter ciems?

post #2208 of 3704
i use the tu-05 with my fad pf viii, akg k3003 (high filter), ue tf10, always pure fun to listen to. also some finetunung with different tube combos possible.

as my favorite tube combos sound seems to be related to my DIY grado style headphone so both ianmedium and bmichels prefer a warmer sounding dl92 (and ianmedium usually using his t5p to listen to tube combos) for your brighter sounding iem i think ianmediums tube recommandations will surely fit your requirements.
post #2209 of 3704
Quote:
Originally Posted by zachchen1996 View Post
 

 

I think I will just stick with the 3.5mm output now. The reason I asked for 6.3, was because I had a dhc ultashort adapter (trrs to 6.3) being made for me, but just simply requested a change so now its trrs to 3.5mm On the go, I will use nt6 pro with the hm901 balanced and then when I can sit down ill use the hm901 with the tu-05 with the nt6 pro. Ianmedium, do you know if the tu-05 would pair well with brighter ciems?

 

XLR is possible. It will just NOT offer balanced signal since the TU-05 is not balanced amp. However, it can improve the signal separation a little by having the ground of the Right & Left  output Tranformer NOT connected together.

 

Kageyuki Shikada even bought for me an XLR plug to see how it will fit, but, as I said my request was too late and I decided not to wait 2 more months for him to disasemble my unit and reassemble it is a "long case".

 

Indeed we found that there was no room available on the front plate with the "short case" , but... with the plug in the back, it should be OK.

 

 

Here are  the 2 pictures that he sent me.  So now he has a spare XLR plug available for you...

 

 

 

Here is the inside of my Amp, showing where I will put my XLR plug.

 

 

And as for tubes, so far the best SOUNDING combo that I have tested is : 

RFT DF97 (modified with pin 4 & 5 connected together)+ Philips DL92  

but I am waiting for my PHILCO 1S4 to test RFT DF97 (modified) + PHILCO 1S4 

 

but the BEST LOOKING Are the Mullard DF91 with those little holes... :D :

 


Edited by bmichels - 9/17/13 at 2:19am
post #2210 of 3704

Just arrived:

 

3x philco 1s4 (so now i am complete having six ones):

 

5x DL620 (you could call it a mini dl92):

 


Edited by GermanGuy - 9/17/13 at 2:18am
post #2211 of 3704
Quote:
Originally Posted by GermanGuy View Post
 

UPDATED TU-05 TUBE COMPATIBILITY LIST:

 

DF91 STAGE:

 

tube same type heater voltage mA compatible (if) powersave mode remark
DF91 1T4, W17, 1K2, 1F3 1.4V  50mA yes, standard tube no tested
1T4T 1T4SF, DF96 1.4V  25mA yes, derived type no tested
DF904 1U4 1.4V  50mA yes no tested
DF96 1AJ4, 1F33, 1T4SF, EP202 1.4V  25mA yes, derived type no tested
DF97 1AN5 1.4V  25mA pin 4 and 5 connected no tested
1F34   1.2V  30mA heater voltage resistor no not tested yet
DF92 1L4, CV1758, 1F2 1.4V  50mA yes no tested
DF61   1.25V 25mA heater voltage resistor, tube socket adapter no not yet tested

 

 

DL92 STAGE:

 

tube same type heater voltage mA compatible (if) powersave mode remark  
DL92 3S4, VT-174, CV820 1.4V  2x50mA yes, standard tube yes tested  
3S4T   1.4V  2x25mA yes, derived type yes tested  
DL91 1S4 1.4V  100mA pin one disconnected no tested  
1L33   1.4V  50mA pin one disconnected no tested  
DL93 3A4, 2P3, CV807 1.4V  2x100mA amp can provide 2x100mA and enough power for anode yes not yet tested, different grid and anode voltage  

 

(*) tube - TYPE - type bold blue means - standard tube

(*) tested means - the tube will work, you can listen to music, no distortion etc. - there is no guarantee that tube bias is correct for a tube tested - wrong bias may result in less lifetime.

(*) standard tube means - tube type the amp was designed for

(*) derived type means - derived from the standard tube, usually for heating with half the current

zachchen1996 - some info - my latest TU-05 tube compatibility list


Edited by GermanGuy - 9/17/13 at 2:23am
post #2212 of 3704

http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread#post_8794450

 

zachchen1996 - some info - ianmediums index post  (page 1, post #3) with a lot of links to articles, tube combos and modifications 

post #2213 of 3704
Quote:
Originally Posted by GermanGuy View Post
 

some tubes worth listening to:

 

df91 - mullard

df904 - telefunken

df91 - rt radiotechnique

df96 - lorenz (not to get)

 

df97 - rft  (with modification pin 4 and pin 5 connected)

 

dl92 - philips

dl92 - rt radiotechnique (detailed)

dl92 - mullard

3s4 - tung-sol mil spec (for me - neutral)

3s4t - orion (maybe to bright sounding)

 

zachchen1996 - some info - these recommandations are a short summary, (Bold Black - the warmer sounding ones) more bmichels - ianmediums taste so maybe fitting the bright iem requirements - , only standard tubes


Edited by GermanGuy - 9/17/13 at 2:47am
post #2214 of 3704
Quote:
Originally Posted by GermanGuy View Post
 

the last index page i made for my posts a while ago can be found here:

 

http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/1440#post_9670023

 

zachchen1996 - some info - the last index page of my posts i made before ianmedium made the indes on page 1 of this thread

post #2215 of 3704

just bought an unused pair of siemens df91

 

http://www.ebay.com/itm/231028125086?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649

 

So this should hold me off until I can get a hold of Lorenz df91's right?

post #2216 of 3704

Also where can I get some Philips Miniwatt DL92's? Is anyone willing to sell me theirs? :D

post #2217 of 3704
Quote:
Originally Posted by zachchen1996 View Post

just bought an unused pair of siemens df91

http://www.ebay.com/itm/231028125086?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649

So this should hold me off until I can get a hold of Lorenz df91's right?

Ahh, the grail! As far as I know I am the only one who lucked out and got the Stuttgart Lorenz's. I think everyone else's are the SEL ones. Apparently the Stuttgarts are slightly different sounding (note I say different, not better!)

The Siemens are wonderful tubes, I think you'll be very happy with those. As to the Philips. Well. All the tubes I have got have been through trawling eBay on a daily basis and having the luck to find them. A great alternative to the Phillips and readily available are the Mullard DL92's. Very similar if not identical as in my case my Phillips were made in the same factory as the Mullards!
post #2218 of 3704
Quote:
Originally Posted by ianmedium View Post


Ahh, the grail! As far as I know I am the only one who lucked out and got the Stuttgart Lorenz's. I think everyone else's are the SEL ones. Apparently the Stuttgarts are slightly different sounding (note I say different, not better!)

The Siemens are wonderful tubes, I think you'll be very happy with those. As to the Philips. Well. All the tubes I have got have been through trawling eBay on a daily basis and having the luck to find them. A great alternative to the Phillips and readily available are the Mullard DL92's. Very similar if not identical as in my case my Phillips were made in the same factory as the Mullards!

 Good to hear that the siemens will still sound great. You said somewhere earlier that the siemen df91's are a bit warmer than the lorenz df91's right? If that is true, then getting the siemens might be a good thing, due to the nt6 pro being bright.

post #2219 of 3704
post #2220 of 3704

:eek:SURPRISE SURPRISE I got this morning !  3 Mazda 1T4....  with holes  :eek: !!! 

 

After the Mullard DF91 with the holes, the MAZDA received this morning also have little holes !  

 

Hope they sound as good as they look  :rolleyes:

 

 

 

 

A nice addition to the mullards... also with holes. 

 

Too bad I don't have tubes with holes for the Power stage, i could have made a complete " 4 tube Combo with holes:p 


Edited by bmichels - 9/17/13 at 9:43am
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Portable Headphone Amps
Head-Fi.org › Forums › Equipment Forums › Portable Headphone Amps › Analog Squared Paper Discussion Thread.