correct, it's a tube buffer.
Aune T1 USB Tube DAC+ SS Amp Discussion Thread ***See first post for FAQ--Updated on 02/14/15*** - Page 307
Gear mentioned in this thread:
Can you please give etched code for each tube in one post or add factory codes to your tube review?
Telling about prints/labels and where/who made it won`t tell much. It`s all about factory codes.
Tubes with a month or even week difference in production time could sound different because of materials batch/source difference.
Thank you for your attention.
was wondering about the codes as well
P.S. any chance for some links to do the research on our own
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Sent a PM instead.
Edited by ramaka - 2/9/14 at 6:36pm
About the codes - That is easier said than done. 70% of my tubes are very hard to make out a code. what I can tell you is how the plates/getters/etc. look ...for example, none of the ones I recommended have the A frame getters ...and people have found the same tubes from the descriptions. YES..date codes would help but 1) You would have to translate 2) You would have to find a seller that has the date codes 3) date code can be different but same exact tubes, just different year/month/week
I will try to get some close ups this week...
And Rob, try a 5BK7A tube. It's my #1 tube right now. Been using it for 2 weeks with no issues. Yes I know that is a 5 volt heater tube, and the Aune is 6.3. It is not running excessively hot or bright. There is a chance it can slightly shorted the filiment life, but not by much. Only talking 1.3 volt difference, and quite a few older tube amps do not supply 6.3 volts exactly.
Edited by lwrs10 - 2/10/14 at 8:02am
Yes, welcome back Coil. And you are correct, getting the date codes is optimal. Just not always possible.
NW...no, they are painted on and prone to peeling. The embedded codes (silvery looking in the glass) are just the tube type such as 6DJ8 or 6GM8..
LWRS...I am DONE with these..lol....that little sucker was eating up my tube budget...I only need 1, have a top 4, the rest I have been selling off and two or 3 I know will wind up in a drawer...LOL
Only tubes that are very consistent for factory codes are American octal base tubes.
I will link a website when I get home for help........
But dammit knock the arguing off you two.
Here is what my tube seller said about my possible CCa:
By A9 he is talking about on the internal shield seen here: