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Crack;Bottlehead OTL - Page 68

post #1006 of 5523

Somebody suggested I post photos of my Crack build.  Here's the first

 

 

map crack.jpg

yes I'm a little bored....

post #1007 of 5523

I did!  And that is ROFLMAO, actually.  Thanks for that.  L3000.gif
 

Quote:
Originally Posted by lextek View Post

Somebody suggested I post photos of my Crack build.  Here's the first

 

 

map crack.jpg

yes I'm a little bored....



 

post #1008 of 5523

Quote:
Originally Posted by BmWr75 View Post

 

Hey Doc,

 

I see people talking about running a 6SN7 adapter in place of the 12au7 on the Bottlehead forum.  Is this a plug and play adapter/tube combo?  Or, does the Crack have to be modified some to make it work?  If plug and play, where could I buy the adapter?

 

I'd ask the question on the Bottlehead forum, but am waiting on my approval over there.

 

Thanks,

Scott

 

There is an adapter that several BH members bought from an ebay seller a while back - see this thread: http://www.bottlehead.com/smf/index.php?topic=2338.0

 

My recollection is that some users reported a bit of hum when running 6sn7's, but I don't recall whether the conclusion was that it was the particular tubes of the adapter causing the issue.  Once you have a speedball in place, 12bh7's are another great alternative input tube.

 

post #1009 of 5523

I just bought a Crack amp from the for sale forum and have been doing some research on vacuum tubes and could just about hit myself repeatedly for wasting money on amps that aren't proper tube amps... So far in my hifi career I've listened to SS and hybrid amps such as the Schitt Lyr.

 

But I know I love tubes and prefer tubes... the reason why I know this is because I love the sound that comes from tubed guitar amps. I suppose the reason I've avoided tube amps so far is that they seem a bit daunting, but not anymore. And I haven't really understood the way the electronics and circuits work inside. Which is also silly cause I have experience with electronics and went to electronic tech school for the military... so I understand how electricity works.

 

Sheesh I just hope I've finally found the "sound" I've been looking for. I have some Senn HD600s that are inbound as well so I should be a happy camper at the end of the week. L3000.gif


Edited by Paganini Alfredo - 1/17/12 at 2:28am
post #1010 of 5523

I really think power tubes have a profound influence on sound, particularly from the 6AS7 family, which the Crack uses.  I have the Woo 3, which also uses the 6AS7 family.

 

Have you looked at the 6AS7 tube rolling thread?  Lots of good info there. 

 

I love the Tung-sol 5998 as my power tube.  But, other great alternatives include the Sylvania 7236, RCA 6AS7G, Tung-sol 6AS7G, and the GE 6AS7GA.
 

Quote:
Originally Posted by Paganini Alfredo View Post

I just bought a Crack amp from the for sale forum and have been doing some research on vacuum tubes and could just about hit myself repeatedly for wasting money on amps that aren't proper tube amps... So far in my hifi career I've listened to SS and hybrid amps such as the Schitt Lyr.

 

But I know I love tubes and prefer tubes... the reason why I know this is because I love the sound that comes from tubed guitar amps. I suppose the reason I've avoided tube amps so far is that they seem a bit daunting, but not anymore. And I haven't really understood the way the electronics and circuits work inside. Which is also silly cause I have experience with electronics and went to electronic tech school for the military... so I understand how electricity works.

 

Sheesh I just hope I've finally found the "sound" I've been looking for. I have some Senn HD600s that are inbound as well so I should be a happy camper at the end of the week. L3000.gif



 

post #1011 of 5523

Quote:
Originally Posted by hodgjy View Post

I really think power tubes have a profound influence on sound, particularly from the 6AS7 family, which the Crack uses.  I have the Woo 3, which also uses the 6AS7 family.


For the resistor-loaded Crack and Woo 3, this is probably the case. For a Speedballed Crack though, with the CCS-load, differences between power tubes is substantially reduced.

 

The 5998 is good, but you really don't miss much with a bog-standard $15 RCA 6AS7G.

post #1012 of 5523

I really like the RCA, but all of mine are noisy.  I've gone through too many to keep searching.  It's a shame, they really are good sounding tubes.
 

Quote:
Originally Posted by Beefy View Post


For the resistor-loaded Crack and Woo 3, this is probably the case. For a Speedballed Crack though, with the CCS-load, differences between power tubes is substantially reduced.

 

The 5998 is good, but you really don't miss much with a bog-standard $15 RCA 6AS7G.



 

post #1013 of 5523
Quote:
Originally Posted by hodgjy View Post

 

Have you looked at the 6AS7 tube rolling thread?  Lots of good info there. 

 


 



 


Nope, thanks. Not that I know a thing yet, but I read that the Tungsol is a good tube to have, no?

 

post #1014 of 5523

Many of us love it, but tube rolling is fun because you can decide what you like.  Plus, since the 5998 has been hunted to extinction, they are hard to get and are expensive.  Other cheaper options have become more favorable and sound very good.
 

Quote:
Originally Posted by Paganini Alfredo View Post


Nope, thanks. Not that I know a thing yet, but I read that the Tungsol is a good tube to have, no?

 



 

post #1015 of 5523

It's here!  I decided not to relocate the RCAs and headphone jack.  Just build it "stock" at first.  Hard to believe this pile of parts will make music.............

DSC_6099.jpg

post #1016 of 5523

I read somewhere that one vacuum tube does the same work as 20-30 discrete, solid state parts.
 

Quote:
Originally Posted by lextek View Post

It's here!  I decided not to relocate the RCAs and headphone jack.  Just build it "stock" at first.  Hard to believe this pile of parts will make music.............

DSC_6099.jpg



 


Edited by BmWr75 - 1/20/12 at 3:56pm
post #1017 of 5523

I would believe it.  The insides of my Woo are orders of magnitude more simple than solid state amps I've opened up.  There's all kinds of widgetry inside solid state amps.
 

Quote:
Originally Posted by BmWr75 View Post

I read somewhere that one vacuum does the same work as 20-30 discrete, solid state parts.
 



 



 

post #1018 of 5523
Just started working on my Crack kit today. Not to sound to corny, butnImam justnhaving a blastnbuilding this thing. So far I've justngot the top plate, transformer and endbell painted.  Used Rustoleum hammertone and it looks great.  Mounted the hardware on the plate and assembled the wood base.  Very, nice woodworking.  I'm sure this "simple" box is often  overlooked.  Alder is a beautiful wood.
    At first I was intimidated about the electrical part.  But after looking at the manual I feel very confident.  Awesome instructions.  I'll post some pictures later.  Thanks Doc.

Edited by lextek - 1/20/12 at 8:07pm
post #1019 of 5523

I freaking love how this amp looks.

post #1020 of 5523
Quote:
Originally Posted by Gloomfire View Post

I freaking love how this amp looks.



Second.

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