Tube Rolling w/Crack

[Wizzie]

Hi

Just want to know has anyone used a 6f8g via an adaptor on their  BHC+SB

And what is your impression on the 6f8g

 

[Rhok]

Hello all,

Any recommendations for some tubes that sound great with a heavy glow?

Crack without Speedball (might get it in the future though).

Thanks,

 

[i luvmusic 2]

One of these should give you plenty of GLOW i don't know about the sound though. ;D

Just Kidding.P

 

[Natural Sound]

You might want to be a little more specific. What kind of amp do you have? The first thing that came to mind when you asked the question is "mesh plates." Mesh plates allow you to see the filament inside the tube much better. I know they make 2A3's with mesh plate. So if you have a Stereomour, Paramount or similar you could try that.

 

[Strikkflypilot]

Looks like he's got crack without speedball.
6080s and 12AU7s is what he's got.

 

[Natural Sound]

Looks like he's got crack without speedball.
6080s and 12AU7s is what he's got.

I guess I should have caught that. Being the Crack tube rolling thread and all.  :-[

 

[Rhok]

I guess I should have caught that. Being the Crack tube rolling thread and all.  :-[

That would be correct, sorry for not including that in my original post.

 

[Rocketman248]

Need a little help identifying a tube.  I was in the first batch of Crack-A-Two-A shipments, and Doc was kind enough to include NOS European tubes with those original orders.  I'm having a little trouble figuring out just what I got.  The writing on it is all but wiped out, but I think I can make out Made In Holland, but I can't be sure.  There's also a date code that doesn't seem to follow the typical Euro tubes date code convention.  It's only 3 digits, a triangle followed by 8L.  It has narrow, ribbed plates, and a D-shaped getter with a small foil strip.

Any ideas what I'm looking at here?  FWIW, it sounds great.

 

[craigtone]

Wanted to add my tube rolling experiences from yesterday ... My build is Crack + Speedball with Alps Blue Velvet pot and Obbligato 70uF Oil Film coupling cap upgrades.  Headphones are DT770 250 ohm.

Driver:
Unbranded Chinese 12AU7 - Harsh & cold, worst of the bunch!
EH 12AU7 - Dark & lacking detail
JAN 5963 (came with) - Not bad but also not the best, good middle road tube
RCA Clear Top - Treble bright & lacking bass
Philco 12BH7 - This is the third best tube heard ... ~ equal to Mullard
Brimar (Mullard) 13D5 - Second best, lots of detail, good bass extension, best midrange of all tested
Telefunken 12AU7 - The best of the bunch!  Very balanced across freq curve, excellent detail and good bass extension

As for the 6080:
Raytheon 6080WC (came with) - Not bad, again, middle road tube
Mullard 6080 - WOW!  The depth and richness of the sound is incredible.  It was like a veil was lifted.  The bass is much better and deeper/tighter.  Detail is incredible!  You can hear sticks hitting percussion and fingers on strings.

The verdict for me is Telefunken 12AU7 driver and Mullard 6080 ... enjoy the tube pr0n pic:

 

[Paul Birkeland]

Need a little help identifying a tube.  I was in the first batch of Crack-A-Two-A shipments, and Doc was kind enough to include NOS European tubes with those original orders.  I'm having a little trouble figuring out just what I got.  The writing on it is all but wiped out, but I think I can make out Made In Holland, but I can't be sure.  There's also a date code that doesn't seem to follow the typical Euro tubes date code convention.  It's only 3 digits, a triangle followed by 8L.  It has narrow, ribbed plates, and a D-shaped getter with a small foil strip.

Any ideas what I'm looking at here?  FWIW, it sounds great.

What does the writing on the white box it came in say?

 

[Rocketman248]

There wasn't any writing on the box.

 

[Paul Birkeland]

There wasn't any writing on the box.

Ah, I must have missed that one.  The tube in the photo is an Amperex Holland 12AU7, a very good tube indeed!

 

[Rocketman248]

Awesome, thanks!  I'm loving the hell out of the Crack-A-Two-A with my HD-800s.  Eventually I'll start rolling tubes and caps in it, but I'm quite satisfied for now. 

 

[Chris65]

The tube in the photo is an Amperex Holland 12AU7, a very good tube indeed!

Doesn't the 'delta' (triangle) code indicate a Philips Copenhagen made tube?

 

[soundfanz]

Doesn't the 'delta' (triangle) code indicate a Philips Copenhagen made tube?

I thought it indicated a dutch made tube?
The below link might help.

http://www.tube-classics.de/TC/Tubes/Valvo%20ECC82/ECC82.htm

 

[Chris65]

According to the info I've found, an equilateral triangle code is Philips, Copenhagen made. The Heerlen code is a right angled triangle.
e.g this page shows the different codes, scroll down a bit.
http://www.audiotubes.com/mullcode.htm

 

[Rocketman248]

Yeah, mine has the right angled triangle, indicating a Heerlen factory.  Mine looks just like the first one on the Tube-Classics page.

 

[Chris65]

Yeah, mine has the right angled triangle, indicating a Heerlen factory.  Mine looks just like the first one on the Tube-Classics page.

Thanks, a bit hard to tell from the photo. You scored a nice tube!

 

[Doc B]

The fingerprints on the plate look like they could possibly be those of Th.P.Tromp himself.

 

[Tom-s]

For tube rolling other tubes than 12au7's, what would you guys suggest?
Any drop-in options that work good via adaptors?
With the R1 resistor mod on speedball boards optimization for the E80CC and 12bh7 is possible, but there must be other options besides these?
Also saw the 5687 switch mod. More options?