[atomicbob]

I'll have to get a couple of 300 ohm 1% MF. Otherwise I can do one channel at a time with a 312 ohm load with a GR1840a.

 

[atomicbob]

Here is a comparison of HD600 and 268R loads at the same input attenuator level for 20 Hz square wave. Same MSD 192 source, 470uF Rubycon capacitors:
 

Above HD600 load - below 268R load

 

[cspirou]

@atomicbob
 
For a capacitor coupled amp, these are pretty good square ware responses. You have any curves at 500Hz?

 

[atomicbob]

@cspirou - I have 200 Hz from that session:
 
Mousai MSD 192 source output 200 Hz square wave 10K load:

 
BH Crack (non-SB) output HD800 load stock 100 uF Aluminum Electrolytics:

 
BH Crack (non-SB) output HD800 load Rubycon 470 uF Aluminum Electrolytics:

 
BH Crack with Tungsram e80cc input and Tung-Sol 6AS7g output tubes, 6AS7g grid adjusted to 88V both halves.
 
I will repeat these measurements when I have all the capacitors I intend to test in house. This was the preview testing.

 

[PETEREK]

First things first, paint. Black with a pearly metallic top coat that changes color at different angles.
 

 

[kekoukela]

Very nice paint job!!!! Keep us updated!

 

[PETEREK]

Who else assembled their crack in a room where they have no computer? I'm getting a workout!

 

[PETEREK]

Ok, not too bad for the first day. I spent probably 3 hours on this, maybe a little more. Hopefully I can get close to finishing tomorrow. And yes, I did route some wires differently, for fun. I used Black Dragon cable for the RCA inputs, for fun, so I had a little extra of each of the stock wires to take different routes. I did a 4 wire braid instead of a 2 wire twist in there. I don't like my stuff to look the same as everyone else's, it's a problem I have.
 

 

[HolyCheese]

  So they'll include a CD with the manuals ? I didn't know about it. But then why'd they put the PDF manuals in the cart ?
Will try to email Doc now, thanks

 
If you have lost the manual it's hard to get it back. But I found this torrent online you could use.
magnet:?xt=urn:btih:1446c8b4919fe5dc3287a7ac2e629cf0f32dc7ba&dn=bottlehead%20crack%20manual.7z
 
I checked it and it looks like it's the same as far as I can remember.

 

[FunyunBreath]

Thats piracy man, I doubt the mods and folks at Bottlehead will be too happy about that link. You should probably edit your post and remove it asap.

 

[Doc B.]

We used to include manuals on CD. But nobody has a CD drive anymore. So the manual is offered in downloadable form when you purchase a kit from us. As for using a manual from a torrent - we do update them every now and then. It may not be a current version. 

 

[hdtv00]

Well isn't it a little ridiculous to have have it for download. I bought mine used on here who I'm sure more than supports bottlehead if there is something wrong with sharing the manual that's just messed up if you ask me.

 

[FunyunBreath]

Maybe I'm wrong here but I would imagine the manual exists on torrent sites to aid people in building the amp cheaper than what it costs to buy the kit through bottlehead.

 

[ph0ngt3p]

Well I've asked Josh to increase my download limit twice and I still couldn't download the manual. The website gave me a 403 forbidden error.

 

[kekoukela]

So I tried to fix my volume intensity with this fix from the FAQ portion of Bottlehead's site:
 
3.  I can barely turn my Crack up at all before it's far too loud, what do I do?
Disconnect the white wire at the pot that originated at the left RCA jack.  Install a 75K resistor between this wire and where it connected on the pot.  
Repeat this step for the red wire coming from the right RCA jack.
Attach and solder one 33K resistor between each outer pair of lugs on each level of the volume pot.
Resistor wattage is unimportant, 1/10 Watt or greater will work nicely.
 
 
When I completed this, the left side as louder than my right side, resulting in a channel imbalance. In my infinitely intelligent brain, I decided to remove JUST the 75K resistors, leaving the bridged 33K resistors on the volume pot. I turned it on and tried on the headphones and now I cannot hear anything. Even after removing all the resistors. If I turn the volume all the way up, I can SLIGHTLY hear music. 
 
Does anyone know what I broke? Or rather an educated guess? It has speedball installed.