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Crack;Bottlehead OTL - Page 551

post #8251 of 8350
Quote:
Originally Posted by Tom-s View Post
 

It's a total of 3.5A rating indeed for the power transformer.

The relative currents don't really matter. 

A 6080 tube runs @ 2.5A heater current. 

So that's 1A to spare for the driver tube (the driver tubes for Crack i know of don't exceed 0.8A).

 

Using 2 6BL7's (6BX7) in parallel (2x 1.5A) you can use up to 0.5A for the driver tube.

i guess this adapter isnt wired right it doesnt work                                                                                                                                  

post #8252 of 8350
Quote:
Originally Posted by Paladin79 View Post
 

I have about a month to catch a deal on high impedance headphones before my Kit arrives so I will have a little time to build up cash reserves for either Sennheiser or Beyerdynamic. Happy St.Patrick's Day!!!


​Looks like we'll both be building our Cracks at the same time ;)

 

Did you get the Speedball as well?

post #8253 of 8350
Quote:
Originally Posted by neddoge View Post
 


​Looks like we'll both be building our Cracks at the same time ;)

 

Did you get the Speedball as well?

Absolutely, and the badge, and the hat lol. I am doing a lot of customizing on it, I have already thought it all through and have some things on the way for it. The circuitry will be similar to the original design but the outside appearance is going to be quite unique. 

post #8254 of 8350
Quote:
Originally Posted by MIKELAP View Post
 

i guess this adapter isnt wired right it doesnt work                                                                                                                                  

 

@attmci has experience using 2 6bl7's?

 

Maybe he can help out.

post #8255 of 8350

.


Edited by i luvmusic 2 - 3/19/17 at 4:11pm
post #8256 of 8350

I do have a plan in mind to modify some existing headphones so they will be 250 ohms and work well with the Crack. Hopefully I will have enough variables so I can adjust the sound for my liking. Final cost, $50 plus labor. I hope I can make the modifications in four hours or less but right now it is a little tough to quantify.  When finished the headphones will look like they belong with the Crack amp I will be building.

post #8257 of 8350

 

Ok I received my 1/8 inch copper plate. It has a few scratches that will buff out but you can probably tell by the finger prints it is pure copper, not coated, precisely 6 inches by 10 inches. It weighs 2.6 lbs. This is not copper plated aluminum lol. Also it is freaking rigid, there is no problem with it supporting two tubes, and a small transformer once cut. Some of the scratches are a little deep for my liking but I plan to add a patina any way but it is certainly thick enough to buff down to a lustrous copper sheen if I wished. Then try to picture it with a bluish green patina against some dark oak (hopefully quartered oak, or even walnut.) I may strive for copper rivets holding brown bakelite tube sockets, attention to detail is important. 


Edited by Paladin79 - 3/20/17 at 4:09pm
post #8258 of 8350
Quote:
Originally Posted by Paladin79 View Post






Ok I received my 1/8 inch copper plate. It has a few scratches that will buff out but you can probably tell by the finger prints it is pure copper, not coated, precisely 6 inches by 10 inches. It weighs 2.6 lbs. This is not copper plated aluminum lol. Also it is freaking rigid, there is no problem with it supporting two tubes, and a small transformer once cut. Some of the scratches are a little deep for my liking but I plan to add a patina any way but it is certainly thick enough to buff down to a lustrous copper sheen if I wished. Then try to picture it with a bluish green patina against some dark oak (hopefully quartered oak, or even walnut.) I may strive for copper rivets holding brown bakelite tube sockets, attention to detail is important. 
With patina that will be bitchin.
post #8259 of 8350
Quote:
Originally Posted by buke9 View Post


With patina that will be bitchin.

it will hide some scratches too, and with a little chemistry the finish will only take one day and then I will clear coat it. I was definitely wrong in worrying about this bending.

 

At least I know now if I use this thickness copper plate on the front and back of the amp, it will support switches, jacks, potentiometers, ac outlets and VU meters once I get my patterns figured out.


Edited by Paladin79 - 3/20/17 at 5:00pm
post #8260 of 8350

My new tube for my CRACK i don't know tho if this Raytheon 6832 Sub miniature tube has been used with CRACK by someone else before me Anyway it sound darn good to my ears i just need to make a proper adapter to be safe so i don't touch any of those small exposed leads for now here it is.

post #8261 of 8350
You are a brave soul.
post #8262 of 8350

I guess changing the socket was out of the question for someone. Nice tube height though.


Edited by Paladin79 - 3/21/17 at 3:48pm
post #8263 of 8350

That just for testing not for permanent use i do have the new adapter just waiting for it to dry.

post #8264 of 8350
Quote:
Originally Posted by i luvmusic 2 View Post
 

That just for testing not for permanent use i do have the new adapter just waiting for it to dry.

Whew! Now I might sleep tonight.

post #8265 of 8350

Here it is.

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