Crack;Bottlehead OTL
Feb 14, 2014 at 4:02 PM Post #3,736 of 12,304
I'm so glad to hear that my old Crack has found itself such a happy home. May it bring you years of enjoyment!!!  
Which tubes are you liking best?

My Curent Fav's are the GEC 6AS7G + Mullard ECC82. On a recent Crack high, I got carried away
bigsmile_face.gif
& ordered a bunch of tubes from Ebay (listed below). Waiting for them to arrive.
 
 
Feb 15, 2014 at 8:45 AM Post #3,740 of 12,304
I can easily perforate the bottom. I didn't realize that the crack would be drawing air from the bottom. Isn't it designed to sit flat across a table or desk?
 
Feb 15, 2014 at 11:14 AM Post #3,743 of 12,304
Tried the Western Electric 421A with the Crack today. Just WOW, this is the best sound from the Crack yet, beats the GEC 6AS7G IMHO. Using it with HD 800, The sound is more meaty, mids are more "full" & retains the top end extension & clarity of the GEC. IMHO Its like the best qualities of TS 5998 & GEC 6AS7G combined together
 
Feb 15, 2014 at 4:10 PM Post #3,744 of 12,304
I have to double check on page 19 of the manual says "Attach and solder one end to the power transformer terminal 4. Attach and solder the other end to terminal 2L" But then it says connect it to 14U instead of 22L yield more quiet operation.
Which is better, 22L or 14U?
Mine is at the moment connected to 14U.
 
Feb 15, 2014 at 4:28 PM Post #3,747 of 12,304
  I have to double check on page 19 of the manual says "Attach and solder one end to the power transformer terminal 4. Attach and solder the other end to terminal 2L" But then it says connect it to 14U instead of 22L yield more quiet operation.
Which is better, 22L or 14U?
Mine is at the moment connected to 14U.

 
I went with 14U and have had no problems.
 
It did have me racking my brains for a moment when it came to checking my build against the pic on page 36 of the manual as it looked like I had a wire missing! But did not take long to trace back to the revision.
 
Feb 15, 2014 at 4:37 PM Post #3,748 of 12,304
   
I went with 14U and have had no problems.
 
It did have me racking my brains for a moment when it came to checking my build against the pic on page 36 of the manual as it looked like I had a wire missing! But did not take long to trace back to the revision.

14U it's then :) thanks for the quick reply, even though I probably will call it a night now  
 
Feb 15, 2014 at 11:06 PM Post #3,750 of 12,304
  I have to double check on page 19 of the manual says "Attach and solder one end to the power transformer terminal 4. Attach and solder the other end to terminal 2L" But then it says connect it to 14U instead of 22L yield more quiet operation.
Which is better, 22L or 14U?
Mine is at the moment connected to 14U.

 
I had the same question when I built mine ...  14U is the way to go!
 

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