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Analog Squared Paper Discussion and Appreciation Thread. - Page 135

post #2011 of 3488
How many hours do you have on them? I am a little concerned that folks are not giving the tubes some decent burn in. Truthfully a good consistent 20-30 hours I find makes a big difference.
post #2012 of 3488

four radiotron 3s4 arrived today:

 

 

 


Edited by GermanGuy - 9/6/13 at 6:21am
post #2013 of 3488
Quote:
Originally Posted by bmichels View Post
 

GG this is for you: Discount on more than  2000 files 24 bits studio master .   Enjoy !  

 

(80% of my downloads are coming from QOBUZ)

 

thanks a lot for this link bmichels. first of all there are a lot of interesting recordings, especially ancient music or music of the middle age (ianmedium - you should have a look at the 'jordi savall' recordings there, i think you mentioned that you like this kind of music), and secondly i now can try to improve my nearly non existing ability to understand french language.:smile:.


Edited by GermanGuy - 9/6/13 at 6:21am
post #2014 of 3488
So it looks like they are basically RCA's which are meant to sound good though the ones I have had have been noisy tubes even after 20-30 hours on them, a bit like the domestic market Sylvania's that originally came with the amp. And I don't think it was down to a bad batch.

I purchased an identical Sylvania from a local supplier and it was just as noisy. That is why I was so pleasantly surprised at what a different animal the Mil-spec Syl's are. Not the same style in sound or quality to the domestic market ones, far superior.

Radiotron is an interesting one for like a lot of "names" on the tubes they can be made by a number of different makers. GE made them as well as Westinghouse.

Have you a set out of your vast collection with a good number of hours on now GG, so that you can hear what they are like fully burned in?
post #2015 of 3488

i think i have to slow down buying tubes, at the moment i am waiting for about five or six different tube types, mostly dl92 or compatible, so 150 to 180 of burn-in ?!

 

but i can not fully share this experience as i often have tried different combinations, but the philips, tung-sol, tesla, philco (but that's history at the moment), lorenz dl92 and compatible tubes and the telefunken and lorenz df91, lorenz df96, rft df97 should all have reached your 30 hours.

 

on the other hand i tried several times just from the beginning listening to new tubes and all of them lost the initial harshness and muffled sound after 10 minutes (i think getting warm to operational temperature), after maybe one hour sound was much better, soundstage started to open and to get wider, and after three to four hours all of them got slightly less bassy and clearer and cleaner sounding.

 

i would have listened to the rft df97 - philco 1s4 combo much longer (but now waiting for the other two philcos i ordered) as they seemed to become my number one and only dream combo.


Edited by GermanGuy - 9/6/13 at 6:43am
post #2016 of 3488
GG, what you write makes a lot of sense to me. I too have a lot of tubes and have decided that once I have these American tubes burned in fully I am not going to change about as much as I have done. My base line now is the Phillips DL92 and Mazda DF91 as first choice. Second choice is Phillips/Lorenz , third for me is Marconi/Siemens and 4th Phillips/Mullard.

This is not in order of best to worst these are simply the combinations I enjoy most. The last combo to try and I will put a good month on them are the Raytheon 1U4's that arrived just as my amp had to be returned and the Ken Rads that are on their way.

Those should be here next week and I will spend the rest of September with the Ken Rad/Raytheon set up (assuming they are all quiet) to get the full gist of it. Something inside of me says I think I will like them, perhaps because they are matched both technically and date wise, my first full set to be that way but also from the history of other types of tubes by those makers, we shall see.

I think that the Phillips/Mazda set up will be first in (once my amp stops sitting in customs that is, looks like I won't have it now until next week, so taunting, the customs warehouse is only 5 miles from my home!) as I know and love that sound so well and I need a base line to evaluate the AK120. Also as of today I have my old LCD2's back, the friend I gave them to found them too heavy so I have them and the T5P's and PF's to evaluate with now!
So frustrating, I was really hoping to have the amp this weekend, still, first weekend I have been home properly since the end of july and I have some flying booked so that will take care of the wait!
post #2017 of 3488
Yay! My amp has been released by customs so that means it will be with me on Monday!! Oh boy, I cannot wait! Also the Stamp Brimars arrived today so at some point I will get round to listening to them but as I said in my other post, first the Phillips/Mazda then the Ken Rad/ Raytheons!
post #2018 of 3488

Ian

 

That is great news! I look forward to your thoughts on the AK120 as source to the TU-05..........

 

:beerchug:

post #2019 of 3488

happy to hear that!

post #2020 of 3488

found 3 additional philco 1s4 on ebay and ordered them!

 

bmichels, i am sure you will ask how i managed to find them. i found them by carefully checking all the offers for "various 1s4 tubes" and then zoomed in all the pictures of the different offers and - hardly to see but there were - philco 1s4 tubes.

post #2021 of 3488

Of some interest for us : Tube dampers.

 

+ many valuables informations (in French) from this guy.

 

post #2022 of 3488

to get rid of the chaos in my tu-05 wooden box i use for my tubes in use i made tube holders using some sponge rubber normally used to protect your knees when working on the floor:

 


i cut the sponge rubber into pieces and made round holes of slightly larger diameter than the tubes with this tool:

 


even the small version shown in the picture above is very usefull just for a pair of tubes :

 


to fill the box with i made larger pieces (green and blue color) and cut a rectangular shape on both sides to later insert wood pieces just fitting between two pieces of sponge rubber:

 


after having put all sponge rubber parts into the box and also putting the wood pieces in between you have a safe place for the tubes and can use the wood pieces to write down the tube types:

 


Edited by GermanGuy - 9/7/13 at 7:07am
post #2023 of 3488
Quote:
Originally Posted by GermanGuy View Post

to get rid of the chaos in my tu-05 wooden box i use for my tubes in use i made tube holders using some sponge rubber normally used to protect your knees when working on the floor:





i cut the sponge rubber in pieces and made round holes of slightly larger diameter than the tubes with this tool:





even the small version shown in the picture above is very usefull just for a pair of tubes :





to fill the box with i made larger pieces (green and blue color) and cut a rectangular shape on both sides to later insert wood pieces just fitting between two pieces of sponge rubber:





after having put all sponge rubber parts into the box and also putting the wood pieces in between you have a safe place for the tubes and can use the wood pieces to write down the tube types:





That's brilliant.
post #2024 of 3488
thanks a lot! !!!!!!!!!
post #2025 of 3488
Quote:
Originally Posted by GermanGuy View Post Warning: Spoiler! (Click to show)
 

to get rid of the chaos in my tu-05 wooden box i use for my tubes in use i made tube holders using some sponge rubber normally used to protect your knees when working on the floor:

 


i cut the sponge rubber into pieces and made round holes of slightly larger diameter than the tubes with this tool:

 


even the small version shown in the picture above is very usefull just for a pair of tubes :

 


to fill the box with i made larger pieces (green and blue color) and cut a rectangular shape on both sides to later insert wood pieces just fitting between two pieces of sponge rubber:

 


after having put all sponge rubber parts into the box and also putting the wood pieces in between you have a safe place for the tubes and can use the wood pieces to write down the tube types:

 

 

 

 

Oh wow...............green with envy here.

 

GG, your DIY skills are spectacular!!!

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