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Analog Squared Paper Discussion Thread. - Page 213

post #3181 of 3704

@xplosive - could be:

 

http://www.radiomuseum.org/forum/common_miniature_7pin_b7g_battery_tubes_valves.html

 

but "licensed" copy = identical ?

post #3182 of 3704

Thank you GG for the link. It explained quite everything. From all of my tube collection I find df96 tubes sounds better than the 1t4. But the noise is quite disturbing. I think one day I should go to Shikada workshop and ask him to put a resistance of 10Ω to the output terminal as connected in series (he did mention this on his email).

post #3183 of 3704

just to mention - the DF92 tubes also work nicely in the tu-05. especially the PHILIPS DF92 is great sounding, also the MAZDA DF92 is worth a try!

post #3184 of 3704

Which noise?

post #3185 of 3704

a little buzzing noise at the background.. just like an old radio finding channel.

post #3186 of 3704

ianmedium recommends cleaning the tube pins when hearing that kind of noise i think!

post #3187 of 3704
Quote:
Originally Posted by xplosive View Post

Instead of getting 10 pcs of phillip 1t4, this ebay seller send me 12 nos 1952 rca tubes.. Just wondering are they the same? As for sound I feel df96 phillip has more dynamic and more bass impact. Not saying that the rca tubes are bad.. They are quite silent actually, but still produce bit more noise than the radio technique 1t4 one. Oh well after trying three of those rca tubes i found a pair that quite matched.

First thing with noise is clean the pins, very often in my experience the rustling noise goes away with clean pins! Secondly give them around ten hours to settle in as some tubes I have owned need that (Hello Mullard!)

The thing with a lot of these sellers is that they are used to sending these tubes to people who are going to use them for their intended purpose, vintage portable radio's. I doubt one person who owns one of those cares about the subtle differences in sound of different tubes as simply with the speaker used they won't be heard.

Often then it is simply about replacing a noisy or defunct tube so they will send out whatever they have and no one bothers as thats all they need!

I had this happen to me and wrote to the seller explaining the application they were being used for and the need for the right make. First time in 40 years of selling these tubes he had ever heard such a request biggrin.gif

The RCA's can be really excellent tubes, especially the older "D" Getter mil-spec ones. He gave you great tubes but for me they are not as good as what you should have gotten as I find the Phillips offers a more refined sound.

There are some American tubes I really like but all of them sound a little more raw and rough than the European tubes to my ears. Again, not bad, just a different sound style. I would imagine if your music is mainly rock they would be perfect!

When looking at matching though not terribly important try to get the numbers matching as they will more than likely have come from the same batch so tolerances will be similar. HOWEVER!

One thing I have learned above everything else with NOS tubes is that it can be a crap shoot. Ones I find fantastic and silent another my find noisy and lacklustre. The reason being with these tubes is that so many may be labelled one thing but are something completely different!

I had that with the first three lots of Telefunkens and now will only recommend the ones with diamond bases made in Berlin as those are fantastic.

The other thing to remember is with a few exceptions (Hello "TEN" and Lorenz Stuttgart) there are literally millions of these in warehouses in boxes waiting for someone to find them so if your patient and keep scanning various countries eBay's you will end up with the ones your searching for in my experience!
post #3188 of 3704
Oh and the buzzing, have you got the metal screens in place, it could also be RF interference !
post #3189 of 3704

Thank you for the inputs guys. Yes this is my very first tube experience. I will try to clean them again. I will ask Borringer to send the GG tube cleaner kit. Funny thing the problem only occur on the df96 (the buzzing radio). I will not stop hunting those beautiful and rare tubes. It is quite fun actually and very challenging too. Or maybe i will ask Shikada to get a pair of beautiful trouble free tubes for me..  :D

 

As for tur06 there is no metal screen like on tu05.

I love my tur06. After having this I am not even bothered to get another amp. The 3D sounding that it produces really awesome. I found other solid amps may able to produce better clarity and details but they just sounds 2D, 2D which means even they are very beautiful sounding but the sound are still limited, like you can see borders or frame on them, The tur06 sound really limitless to me,

 

Any other impression guys for the tur06. This thread really lack impression of the tur06..

 

 

 

post #3190 of 3704
Quote:
Originally Posted by xplosive View Post
 

Thank you for the inputs guys. Yes this is my very first tube experience. I will try to clean them again. I will ask Borringer to send the GG tube cleaner kit. Funny thing the problem only occur on the df96 (the buzzing radio). I will not stop hunting those beautiful and rare tubes. It is quite fun actually and very challenging too. Or maybe i will ask Shikada to get a pair of beautiful trouble free tubes for me..  :D

 

As for tur06 there is no metal screen like on tu05.

I love my tur06. After having this I am not even bothered to get another amp. The 3D sounding that it produces really awesome. I found other solid amps may able to produce better clarity and details but they just sounds 2D, 2D which means even they are very beautiful sounding but the sound are still limited, like you can see borders or frame on them, The tur06 sound really limitless to me,

 

Any other impression guys for the tur06. This thread really lack impression of the tur06..

 

 

 

 

 

 

Just FYI, I don't know if the sound problem you're having are the tubes or not, but in my case I had a "charging up" or "charging down" which happened on all 1T4(SF) tubes I had and Shikada-san checked it out. It turned out to be transformer which required fixing so Shikada-san took it back. I'm taking the opportunity upgrading to v2.0 of the TUR-06 meanwhile (some internal circuitry change to lower noise floor, etc.).

post #3191 of 3704

Thank you for the info anakchan, Yes if I have the opportunity I will take the tur06 to Shikada. Have you got your tur06 back after the upgrade? How does it sound now?  

I read on the a2p fb on the tu05 "Low frequency will be lower, the high frequency seems to be a little soft" . I am not sure if I want that..

post #3192 of 3704

The A2P really makes the Hugo shine, for sure.

 

post #3193 of 3704
Oh that is a great picture WC!
post #3194 of 3704

@explosive - at least for the tu-05 i can say (ok, i am using grado headphones so in general more agressive highs) that for example the RFT DF97 (pin4 and 5 connected) is higly resolving with excellent highs and if you want an even more engaging, agressive sound, i can recommend the MAZDA DF92 (no modification needed). an excellent tube is also the PHILIPS DF92, slightly less 3d than the RFT DF97, but how to say, best of two worlds, more texture, nice highs, slightly more body and weight than the RFT DF97.

 

also in the meantime i spent a lot of time to listen to the Telefunken Diamond Base DF96 which is an outstanding tube, really adds bass weight and depth, not darker but warmer sounding WITHOUT missing some sparkle and highs.

 

if i use my RFT DF97 - PHILCO 1S4 combo with my modded amp, i have to use the 8 ohm impedance output setting of the output transformers for the grados, when using the TELEFUNKEN DF96 - Mullard DL92 combo, i can use the 32 ohm impedance output getting an unbelievable homogenous sounding result with great soundstage depth and a high level of realism, you stop thinking and start listening.


Edited by GermanGuy - 3/2/14 at 1:37am
post #3195 of 3704

Thank you for your recommendation GG. Tempted to get the Mazda DF92 tubes now, engaging and aggresive that is my kind of music :D  I am still waiting for my ms1i mod to come. I think they will be an awesome pair. Also hoping that dbTubes still have a pair matched diamond base telefunken df96. In the meantime I still have silvania, rca and radio technique tubes for the tur06. I think they sound pretty good and i can live quite happily with it

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