Tube Rolling w/Crack

Tom-s said:
@ Zarno.

Follow PB's advice first. Even with GE's it should sound right. Or these were bad tubes, could be.

Finding real Telefunken 6080's will be extremely difficult. It is a very popular fake, be very careful. And the bass is lacking i.m.e.. I'd put my money on a GEC 6080 instead (found for +-50€ from the UK).

Here's a post of myself on another forum:


For output tubes, my recommendation would be a Svetlana 6H13C with your Telefunken driver (nice coke bottle).
You can find these on E.ay.

Edit: O, you own Telefunken 6080's wow! Want to trade for a few driver tubes? ;)
But my advice on that one would be, DONT! ;)
Click to expand...


Hello Tom s
i confess you scared me so much this morning while reading the incredible post you enclosed ; i had to quit eating my breakfast !!! lol
but i have to say ........i might have an incredible luck for these tubes  ;) :) ;D i will enclosed fw pictures i have made this am and will wait for your confirmation but reading all the warnings and the ways to make detection of a fake , i think i can dance and scream loud saying i have a true and original almost new Telefunken 6080  8) :P :o

same for the 12 AU7 ..........there s nothing on it at all except strange paint on the very tip .............................AND a diamond with positive edges  ;) but i might be not very good with macro pictures and need to clarify this !!!!
thank you so much for the quality of your article  and sorry if its not allowed here  , i won 't do it no more.... but Fuck the fakers!!!
 
Hi Zarno -

Another suggestion and a thought.

Suggestion: can you take some clear photos of the wiring and post them on the forum?

Thought: some of what you are hearing (and not liking) might be explained if you had the electrolytic output capacitors replaced with film capacitors. Film caps can take a while to "burn in". In my various experiments with film caps, I've found that at first listen the treble can be a bit harsh and the bass is often muted and mushy. With extended use, the treble is usually the first to get better, with punchy and clear bass being the last thing develop (taking as long as 100 hrs with some of my caps).  The capacitance value of the caps can also affect the sound - for example, if you replaced the output caps with much smaller value film caps.

cheers, Derek
 
@ Paul

yes it should be easy for me to find such tube !!!! heard a lot about it lately ....... i m not so far from the old factory!!!!! Thomson or La radiotechnique is the same so ??? what kind of driver tube do you use for this nice sounding combo??

but people are crazy here about since a very little time ; can t find one for less than 60 euros !!!
same as Tom's says ....i ve been looking for a GEC put people are asking me 100 bucks ,grrrr

one of my friend can sell me an RCA 6AS7 G for 40 and a Mullard uk for 100 ??
 
Zarno said:
is there any particular one i should try first ?...or for sure have to re-do all of them :-[ :-[ :-[
Click to expand...

There aren't that many solder joints in the amp.  I can reheat and reflow all the joints in a Crack in about ten minutes.
 
i was also thinking of the way of the phase ???is this important for this amp??

i ve seen the big difference here in Europe with this issue on my HE hifi system .....bought a furutech TP E 80 and could see the difference when inverting the phase ..........
 
Zarno said:
... the HD 650 with the stock cable and regarding this would you be kind to tell me if there is a way to correctly set it back to the headphones (only one way to insert the plug??? not easy to say that in french translation  =Keyed?) ....
Click to expand...

If you look closely at the pins, you will see that one is larger than the other.  You should be able to see that one hole in the headphone is larger that the other and line them up correctly that way.  I could be wrong, but I think the small pin is forward on the right side and the large pin is forward on the left side.  The pins will only insert easily in one orientation - don't try and force them in.  Keep switching the orientation until they insert easily.
 
Zarno said:
Derek;
do you know the correct size for posting ?? my pics are around 2 to 3 mb ....
Click to expand...

I resize to less than 2 MB - typically to less than 1.
 
Congrats, the picture can be seen and that's a real Telefunken 6080!  :o


And just to make you aware. There's a modify message button on right top corner of every message.
This can be used to add information (that you forgot) to your last message. In such a way you don't have to post a new one every five minutes.
 
I'm sure you have your 650 cable sorted now but the L & R on the plugs will always be on the outside matching the similar ones at the top of the earpiece on the headband when plugged in correctly. Yes the pins are different sizes so will only fit one way.
 
Tom-s said:
Congrats, the picture can be seen and that's a real Telefunken 6080!  :o


And just to make you aware. There's a modify message button on right top corner of every message.
This can be used to add information (that you forgot) to your last message. In such a way you don't have to post a new one every five minutes.
Click to expand...

How can you tell it’s genuine out of curiosity? I just received two that were allegedly NOS but I’m skeptical.
 
There's part you can learn from Jac: https://jacmusic.com/nos/images/Fakes/

For me it's the internal construction i always look at with all tubes.
Here's a few links with relabeled ones:
This first one is a GE i think: https://www.watfordvalves.com/product_detail.asp?id=4700
These are RCA: https://www.picclickimg.com/d/l400/pict/143378485358_/Telefunken-6080-Verst%C3%A4rker-Gleichrichter-Regel-R%C3%B6hren.jpg
This is a Russian 6H5/13C: https://www.frihu.com/images/ngg_featured/telefunken_6as7g.jpg
 
Tom-s said:
There's part you can learn from Jac: https://jacmusic.com/nos/images/Fakes/

For me it's the internal construction i always look at with all tubes.
Here's a few links with relabeled ones:
This first one is a GE i think: https://www.watfordvalves.com/product_detail.asp?id=4700
These are RCA: https://www.picclickimg.com/d/l400/pict/143378485358_/Telefunken-6080-Verst%C3%A4rker-Gleichrichter-Regel-R%C3%B6hren.jpg
This is a Russian 6H5/13C: https://www.frihu.com/images/ngg_featured/telefunken_6as7g.jpg
Click to expand...

Using the sophisticated methods of "reading the eBay listing" and triangulating that with the links you posted I determined I did, in fact, buy TFK branded GE valves. So I got what I paid for.
 
Be careful paying for tubes.

My best recommendation price/performance for Crack output tubes (for those who wish to do tube rolling) would be

1. Svetlana 6H13C (comes with OTK stamp, winged C, blabla) from Russia (large soundstage, mellow everything, good tone).
2. Thomson CSF France 6080WA (large soundstage, more details, even better tone, less bass as the above).

Both are +- 15€ online.

For input tubes with the speedball i'd go with the Tungsram E80CC (best paired with 6H13C) (found for +- 20€ online) NOS as a first tube rolling option with a definite improvement over most 12AU7's.
 
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