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Aune T1 USB Tube DAC+ SS Amp Discussion Thread ***See first post for FAQ--Updated on 02/14/15*** - Page 359

post #5371 of 8013

6cg7 6fq7 e288cc for example

post #5372 of 8013
Quote:
Originally Posted by Taliesin View Post

Are there any tubes that work with the T1 that look different from the stock tube, and have an interesting shape

Pinched waist Amperex? They're +++>>>$$$$$$$ though.
post #5373 of 8013
Quote:
Originally Posted by audioisemotion View Post
 

I got the camera out and zoomed in and it seems my Mullard ecc85 is 1u7 delta 4H1 (not 9H1 as advertised) (delta meaning a triangle on it's side)

 

The 1u7 part the 1 is just a small stroke so I'm guessing a number 1.

 

I sorry if anyone has bought an ECC85 because I said that my two were better sounding than any ecc88 and then found their new Ecc85 distorted when played.

 

I too have now bought a third  and it distorts badly.

 

However, unless someone tells me the ECC85 is going to hurt the Aune T1, then it will be in there a long long time.

 

It's superb (or for most of the forum "Awesome", the first and only time I will use the word.) Showing my age I guess :D

If it were me I'd PM Coil about it.

post #5374 of 8013
The hit/ miss pairing of the ECC85 with the Aune T1 really makes it a financial gamble.
It seems less tolerant than recommended tubes where even if you buy a less specific model but same type, it still works without distortion, albeit maybe not as beautifully or the stated impression.

I appreciate everyone posting their experiences especially the tube experts.

I'm almost inclined to avoid the ECC85 altogether even if I find one that exactly matches one of your working ones, correct?
post #5375 of 8013
I wonder if ECC85 compatibility is device specific. Meaning, a tube that works fine for one person's T1 does not work for someone else's T1.

Are the ECC86 tubes a gamble as well?
post #5376 of 8013
Quote:
Originally Posted by rwpritchett View Post

I wonder if ECC85 compatibility is device specific. Meaning, a tube that works fine for one person's T1 does not work for someone else's T1.

Are the ECC86 tubes a gamble as well?

 

No. It has to do with the gain/plate resistances. The circuit is not set up for ECC85/6AQ8. Some just happen to work great, some do not. 

 

 

But, as I said many many pages back, to fix the distortion simply turn the player volume down a tad on your computer and turn up the Aune. There is no set standard/value/brand/test that will determine which ECC85 will work everytime. I use a GE blackplate 6AQ8 every day that has zero distortion with all volumes maxed. 

 

 

Any why is there an "APPROVED" list for tubes that will work? That is silly.......

 

 

 

 

 

 

Quote:
Originally Posted by Charliemotta View Post
 

If it were me I'd PM Coil about it.

 

 

 

And I am the one who did all the research on the different tubes we can use BTW......The one who first recapped it, traced out the signal path, etc. 


Edited by lwrs10 - 6/6/14 at 8:22am
post #5377 of 8013
Quote:
Originally Posted by lwrs10 View Post

No. It has to do with the gain/plate resistances. The circuit is not set up for ECC85/6AQ8. Some just happen to work great, some do not. 

How does ECC86/6GM8 compare with respect to gain/plate resistance, etc?
post #5378 of 8013
Quote:
Originally Posted by rwpritchett View Post


How does ECC86/6GM8 compare with respect to gain/plate resistance, etc?

 

 

Google ECC86 datasheet and whatever else you want to compare it to. 

 

 

 

As for ECC85/6AQ8 tubes that will work, would anyone be interested in ones I have personally tested to work fine? I have a few......hundred.......of them.


Edited by lwrs10 - 6/6/14 at 9:59am
post #5379 of 8013
From what I've read, the difference is only in the heater current:

E88CC (stock for Aune T1) & ECC88 = 365mA
ECC85 = 435 mA
ECC86 = 330 mA

I don't know what that means exactly. The ECC85 obviously draws more current which is probably why some don't work in the Aune T1 which is designed for E88CC tubes. It looks like the ECC86 tubes would be a safe bet since it draws a little less. Is my thinking correct?
post #5380 of 8013
Quote:
Originally Posted by lwrs10 View Post
 

As for ECC85/6AQ8 tubes that will work, would anyone be interested in ones I have personally tested to work fine? I have a few......hundred.......of them.

I'm interesting. Do you have Brimar/Mullard/Telefunken?

post #5381 of 8013
Quote:
Originally Posted by rwpritchett View Post

From what I've read, the difference is only in the heater current:

E88CC (stock for Aune T1) & ECC88 = 365mA
ECC85 = 435 mA
ECC86 = 330 mA

I don't know what that means exactly. The ECC85 obviously draws more current which is probably why some don't work in the Aune T1 which is designed for E88CC tubes. It looks like the ECC86 tubes would be a safe bet since it draws a little less. Is my thinking correct?

I'm thinking maybe it has to do with replacing the caps?

Higher quality caps might be able to handle the load better or something.

post #5382 of 8013
Quote:
Originally Posted by rwpritchett View Post

From what I've read, the difference is only in the heater current:

E88CC (stock for Aune T1) & ECC88 = 365mA
ECC85 = 435 mA
ECC86 = 330 mA

I don't know what that means exactly. The ECC85 obviously draws more current which is probably why some don't work in the Aune T1 which is designed for E88CC tubes. It looks like the ECC86 tubes would be a safe bet since it draws a little less. Is my thinking correct?

 

Current draw from the heaters is not that relevant. Sure, it shouldn't draw a massive amount of current, but the problem with other tube types is that they have other characteristics. Different capacitances, different curves.

 

I tried some ECC85 from Siemens with no luck. 3 of them were badly distorted. Only one of them kind of worked, but I didn't like the sound.

I did try two Valvo E288CC. They draw a lot of current (475mA), but they did work just fine. Was one of my favorite tubes until I got my hands on a Adzam E88CC SQ yesterday.

 

 

Quote:
Originally Posted by zoneykid View Post
 

I'm thinking maybe it has to do with replacing the caps?

Higher quality caps might be able to handle the load better or something.

 

No, changing the caps wouldn't change anything. I have other caps in my Aune. The ECC85s I own still don't work. As I said, it is totally independent from the heater current.

post #5383 of 8013

my e288cc works perfectly fine as well. Same for the two 6cg7 tubes that I have. I think 6cg7 tubes draw 600mA 

post #5384 of 8013

Anyone tried E88CC PHILIPS SQ?

post #5385 of 8013

Are they Philips MINIWATT SQ E88CC?  If so, if you can find one for under $100 with 75%+ of the life left, grab it.  They go all day for $130+, especially if you don't like Ebay for tubes (all my tubes are off Ebay, all NOS ones too)  Show a pic of the tube, Philips made like three kinds of the SQ.

 

Does it look like this: http://www.tubemonger.com/Philips_Miniwatt_MINT_NOS_1962_SQ_E88CC_6922_p/210.htm

 

If you are looking at a Miniwatt (even though I have no experience with them, may be awesome tubes), but for that money you can get a Siemens CCa, which is one of the highest regarded E88CC with highly limited stock (they were never supposed to leave Germany).

 

 

Do you know what Country it was made in?


Edited by NCSUZoSo - 6/7/14 at 6:20am
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