Crack;Bottlehead OTL
Apr 17, 2017 at 7:32 PM Post #8,476 of 12,346
  I should be building the newer version as well soon. Just glad I decided to run it as a basic amp before installing the speedball. Something in my psyche reacts when i have to rip out parts I just put into something but it needs to be done for the upgrade. You should have a lot of fun building it, just pay close attention to the upper and lower solder lugs and you should be fine. 

Im definitely going to build it sans speedball first. A buddy of mine built me a custom wood desk, and I need to find out what color stain he used so I can match the crack to it.
 
Apr 17, 2017 at 7:38 PM Post #8,477 of 12,346
Im definitely going to build it sans speedball first. A buddy of mine built me a custom wood desk, and I need to find out what color stain he used so I can match the crack to it.

Great I watched several videos on finishing quartered oak but I will have to watch them again. I doubt you will have problems but I will help if you have issues.
 
Apr 17, 2017 at 8:22 PM Post #8,478 of 12,346
   
 
 Amperex 7316 can be a lot of factories (like any Philips tube). The D-strips Foil getter ECC82 come from the Heerlen factory in my collection (Branded as Philips, Adzam, Valvo). And the Amperex bugle boy ECC82's are from Heerlen aswel.

Yes,  the tube with a delta sign. Attached is a picture of a foil D gutter. 
 
But a 7316 is an ecc82 substitute and they sounds quite different (at least to me). 
 
Some ref. here:
 
https://www.audioasylum.com/messages/tubes/170117/re-amperex-7316
 

 
Apr 17, 2017 at 8:23 PM Post #8,479 of 12,346
Im definitely going to build it sans speedball first. A buddy of mine built me a custom wood desk, and I need to find out what color stain he used so I can match the crack to it.
Myself I would go with something that contrasts it to make it stand out.
 
Apr 18, 2017 at 6:06 AM Post #8,481 of 12,346
  Yes,  the tube with a delta sign. Attached is a picture of a foil D gutter. 
 
But a 7316 is an ecc82 substitute and they sounds quite different (at least to me). 
 
Some ref. here:
 
https://www.audioasylum.com/messages/tubes/170117/re-amperex-7316
 

 
Thanks for info, may be worth checking it out, I would say for most of the time I am after "lush" type of sound.
 
Apr 18, 2017 at 12:19 PM Post #8,482 of 12,346
Try Hamburg (Valvo) or Blackburn (Mullard) made Philips ECC82 tubes. Just a normal plate small O getter Hamburg Ecc82 can ben found cheap and sounds a million!
 
Like these: http://www.ebay.de/itm/2-Doppel-Triode-ECC-82-VALVO-Code-Nr-Gf0-D9F-Messwerte-16-17-ma-16-17-ma-/391757452640?hash=item5b36905560:g:TfMAAOSw4CFY72SX
 
NOT these (Valvo brand but Heerlen made, different getter, build): http://www.ebay.de/itm/ECC82-E82CC-12AU7-pair-VALVO-ribbed-plates-O-Getter-Tube-Rohre-Valvola-NOS-/152512896180?hash=item23827a1cb4:g:tTAAAOSw7U5Y82Cj
 
And for Mullard goes the same, buy the early Blackburn versions, not the other factories. 
 
Apr 18, 2017 at 1:21 PM Post #8,483 of 12,346
After testing some Alps, Vishay, Bourns, and TKD pots I will probably go with the Alps on my dual builds. Single gang pots although I bought a couple duals in case I build Cracks for friends. I prefer single gang but not everyone does.
 
The Alps I will be using have solder lugs like the original pot, so many are made for mounting in a circuit board that this style is not always easy to find.
 
Apr 20, 2017 at 6:53 PM Post #8,484 of 12,346
Mine arrived today. I only had time to check the parts list against contents before leaving the house.
 
Apr 20, 2017 at 7:07 PM Post #8,485 of 12,346
Cool my second arrives tomorrow.
 
Apr 20, 2017 at 7:15 PM Post #8,486 of 12,346
Mine is still on track for tomorrow.
 
Apr 20, 2017 at 9:24 PM Post #8,487 of 12,346


Sorry for the potato pic, but I thought I'd share anyway...

Padauk Crack base build in progress.
 
Apr 20, 2017 at 9:28 PM Post #8,488 of 12,346
.
 
Apr 20, 2017 at 9:46 PM Post #8,489 of 12,346
Definitely different tubes the RCA is not real good.


Really? I actually really enjoyed the stock RCA tubes. I have since purchased a hand full of others including NOS Mullard, NOS GE, RCA clear top & a couple 6as7's. I enjoy them all but the stock seem to be some of the cleanest of the group so far. What do you recommend as far as tubes?....
 
Apr 20, 2017 at 10:08 PM Post #8,490 of 12,346
6080 Tung Sol Chatham
 
Buke is sending me one of these to try out so apparently he likes it pretty well. I have only heard good things about Tung Sol but my tube knowledge is lacking. I used to own hundreds of them but technology changes so I am just getting back to them. Funny how the circle goes around, vinyl is making a comeback and people are looking for NOS tubes from the fifties and sixties.Kind of makes you want to start socking things away in a warehouse like Andy Warhol., Who knows what might have great value one day?
 

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