Tube Rolling w/Crack

[lth1]

It is a GE tube.

 

[Wizzie]

Thanks heaps lee

 

[Rhok]

Looking for tube identification, as I keep spending money on various 12AU7 tubes and keep going back to the one that shipped with my kit.

Those are the only markings on it.

It definitely looks like a GE - but what kind?

 

[lth1]

It is a GE tube.

 

[Wizzie]

I think Lee is on fire

 

[Wizzie]

Hi all

Been recently using a BHC + SB with Raytheon 6080WB and Mullard e80cc with the R1 resistor mod and have been very positively surprised with its sweet sound quality

My headphones are Beyerdynamic T1 1st gen.

Has anyone been using other e80cc with success?

 

[ALL212]

Thought I'd chime in on the 6SN7 change.  I'm using the 6.3v adapter from the Lowther_Club to go from the 12AU7 to a 6SN7. No noise at all.  It certainly didn't hurt the sound and I find it very nice and easy to listen to.  It's been awhile since I've been on Crack so I should probably pop the 7316 I was using back in there and see what differences there are.  I'm using a  "smoked" glass tube.  Not any markings to ID it further.

Don't be in a hurry to get this adapter.  It ships from China and has taken a full three weeks to arrive with abysmal packing.  But it arrived in one piece.

 

[LuckyGus]

Hello,

I have a Crack w/ Speedball, currently use a Tung Sol 5998 and Gold Lion 12AU7 (I still own the stock Crack tubes). I just sold my HD600/DT990 for an HD700 but haven't opened and used it yet (I'm home for winter break). Does anyone have any recommendations? I can't find any tips online (besides one guy who recommended a Mullard 12AX7). I suppose I'd like to keep using the 5998 since it was so expensive lol (unless someone strongly recommends a different driver tube) and look into possibly changing my preamp tube (possibly something that will tame the infamous "hot" treble). I listen to almost everything except rap, EDM and country. Alternative/Indie/Rock is probably my favorite. I'm pretty big on mids/vocals.  Thanks!

 

[LuckyGus]

I have the BH Crack w/ Speedball, Tung Sol 5998, Gold Lion Genalex 12AU7, just got an HD700. Haven't yet tested the headphone-amp pairing, but I was wondering what your opinion is on 12BH7A vs Telefunken ECC82. Thanks!

 

[lth1]

With 5998 or 7236 I would go with the 6085(first)or E80CC(second).  The 12BH7(A) is an OK sounding tube, better than a lot of the 12AU7's.  The 7236 IMHO is the best bargain tube for the Crack, almost as good (or as good) as the 5998 but 25-50% cheaper.

 

[LuckyGus]

With 5998 or 7236 I would go with the 6025(first)or E80CC(second).  The 12BH7(A) is an OK sounding tube, better than a lot of the 12AU7's.  The 7236 IMHO is the best bargain tube for the Crack, almost as good (or as good) as the 5998 but 25-50% cheaper.

Which tube is the 6025? I can't find it anywhere

 

[lth1]

Sorry for the typo, it is the 6085 tube.

 

[Chris65]

Sorry for the typo, it is the 6065 tube.

6065 is a 7-pin pentode. I guess you mean 6085 = E80CC. ;D

 

[lth1]

Just had Cataract surgery last week, looks like 6065 on tube, should have looked at the box, sorry.  It is a Philips 6085, pinched waist, double horse shoe top getter, made in holland.  One of the best sounding tubes I have ever listen to.  Have talked to several of the big tube dealers and not one of them has ever seen or heard of this tubes configuration.

 

[ssenesy]

Just another request for some tube identification help.  This 12AU7A came with my Crack-a-two-a.  Obviously a GE tube, but the label indicates made in Great Britain.  I'm thinking maybe a Mullard or Brimar made under license for GE? 

No matter what, it sounds wonderful paired up with a Tung-sol 5998.

Thanks in advance.

Stan

 

[Paul Birkeland]

I have the BH Crack w/ Speedball, Tung Sol 5998, Gold Lion Genalex 12AU7, just got an HD700. Haven't yet tested the headphone-amp pairing, but I was wondering what your opinion is on 12BH7A vs Telefunken ECC82. Thanks!

The 12BH7 isn't quite a drop in substitute and the amplifier would need light modifications to use it.

 

[Paul Birkeland]

Just another request for some tube identification help.  This 12AU7A came with my Crack-a-two-a.  Obviously a GE tube, but the label indicates made in Great Britain.  I'm thinking maybe a Mullard or Brimar made under license for GE? 

I think that may be a 60's Brimar.

 

[ssenesy]

Thank's PB.  Whatever it is, it's well matched with my Tung-sol 5998.

 

[Rhok]

I got some 5998's coming in the mail, tube rolling has been an expensive venture - I think I'm finally coming to a close though.

Currently using a NOS Mullard CV4003/12AU7 (cryo treated, snake oil? probably) currently paired with a Sovtek "Winged C" 6AS7G which is a winning combo, but I've heard too many things about the 5998's to not give them a go, they were unfortunately the most expensive tubes I will hopefully ever purchase.


EDIT:

Got them in the mail, amazing tube, glad I got 2 - as I guess these will continue to grow in scarcity and continue to increase in price.

Question if anyone knows the answer, one of them actually has some writing on the inside of the tube "g F N", anyone know what it's about? never saw anything like it before:

 

[Tom-s]

I'm tube rolling with the 6080 tubes. Now i got a box of a few 6080's from different brands.
They all sound sort of the same. Wasn't expecting anything from the listed Raytheon JRP6080wb since i had that one with my crack originally and the 6H13S that replaced it was way better.
Now from the box i got, the Raytheon CK6080wb was actually the best by far. Even better than the russian tube (the rest was inferior).
So the question is about my new Raytheon. It has thicker mica's and a sort of support rods around them with place holding all in place that are touching the glass. The code is different and it says: "tested by Bendix" on the back. My question is: What are these plates called? Is this extra support what make it superior?
What do i look for if i want a tube with a similar sound?

The Raytheon that came with crack:

The different Raytheon: