[DoYouRight]

well the dimensions I could find, but not necessarily how high to stack them and you guys since having built with alot of the same parts would have more idea. The headqwize forum of b22 is gone and it had alot of info that would help me. I just see how so many others have input to help, and I would like to have a similar oppourtunity.

EDIT: also on searching here, I only found my own posts of questions, or someone saying BUILD IT, when I searched for 6 board B22. I just wanted to help to have as few roadbumps along the way, and not have to ship a chassis back and forth

 

[oneplustwo]

You may need to take into account any height below the board for standoffs/terminal blocks also. Otherwise, you will need to keep in mind that jacks/pots/switches/etc. take up real estate as well so it's not just the boards. My reco would be to go one size bigger than you think you'll need. Better to have too much room than not enough. Also, having extra space may make your life easier when trying to wire everything up.

 

[Karu]

I've been lately thinking about ecological solutions. I know that class A amplifier is inherently anything but ecological.

Let's assume that we have a 6 board β22 with 2 σ22s as power supply. The regular solution would be to use each σ22 to power 3 β22 boards with the power switch on the AC side. I've been thinking of putting 2 separate power switches for those situations where I want to use the β22 unbalanced and need only one headphone. The problem is how to conveniently switch the power off from the active ground boards when I want to use β22 in balanced mode?

I've gathered that it is a bad idea to use a switch for this purpose on the DC side as it wears the components on those boards when they are switched back on.

 

[smeggy]

x2

 

[fishski13]

Quote:

Originally Posted by DoYouRight /img/forum/go_quote.gif well the dimensions I could find, but not necessarily how high to stack them and you guys since having built with alot of the same parts would have more idea. The headqwize forum of b22 is gone and it had alot of info that would help me. I just see how so many others have input to help, and I would like to have a similar oppourtunity. EDIT: also on searching here, I only found my own posts of questions, or someone saying BUILD IT, when I searched for 6 board B22. I just wanted to help to have as few roadbumps along the way, and not have to ship a chassis back and forth

before you buy a chassis, populate 3 boards and stare at them. then stare at them some more. sketch out some 1:1 drawings on graph paper. lay out the boards on the drawings and stare at them some more. seriously, you need to put some effort into this.

 

[johnwmclean]

One of the reason’s I opted to build a Beta22 was the huge support provided be the Headwize site. Three massive threads covering lots of issues and topics in fine detail. I managed to get through my build with that help, I couldn’t imagine doing it without, so I feel for anyone at the moment taking on the Beta22 without that knowledge.

 

[digger945]

I got a clear work mat from the local United Educational Arts store, it is marked with lines 1 inch apart. You can cut it with a knife or sling solder on it and it holds up pretty good. They come in different sizes, mine is 13x19.
Makes it easy to lay unpopulated pcb's and stuff on top and see how it's gonna work out and how much room you've got.

 

[amb]

Quote:

Originally Posted by smeggy /img/forum/go_quote.gif Hmm, so what is the reccomended way to go about it? It's for going to the stax box the same as if I plug it into the headphone socket.

You could use a high-current DPDT switch, or a DPDT relay activated by a smaller switch), or the relay activated by the switch in the headphone jack...

Quote:

It's a standard neutric which lifts all three contacts when plugged in and closes them when unplugged so no signal passes with headphones in and all three pass without. Whichever way I look at it it still doesn't make sense as it;s essentially just an extension of the jack which I'm using in another amp to switch from 1/4 to 1/8" phone jacks. Only one can be active at a time.

What is the exact part number for that jack? And how did you hook it all up? A diagram would help.

 

[amb]

Quote:

Originally Posted by Karu /img/forum/go_quote.gif I've been lately thinking about ecological solutions. I know that class A amplifier is inherently anything but ecological.

Speaking "ecological" and "class A" in the same sentence? Heh...
If you want to save power, build a class D amp.

Quote:

Let's assume that we have a 6 board β22 with 2 σ22s as power supply. The regular solution would be to use each σ22 to power 3 β22 boards with the power switch on the AC side. I've been thinking of putting 2 separate power switches for those situations where I want to use the β22 unbalanced and need only one headphone. The problem is how to conveniently switch the power off from the active ground boards when I want to use β22 in balanced mode?

There is no convenient way to do it if you divide the power supplies up this way.

Quote:

I've gathered that it is a bad idea to use a switch for this purpose on the DC side as it wears the components on those boards when they are switched back on.

Correct, see related post.

 

[fishski13]

Quote:

Originally Posted by digger945 /img/forum/go_quote.gif I got a clear work mat from the local United Educational Arts store, it is marked with lines 1 inch apart. You can cut it with a knife or sling solder on it and it holds up pretty good. They come in different sizes, mine is 13x19. Makes it easy to lay unpopulated pcb's and stuff on top and see how it's gonna work out and how much room you've got.

i like butcher block from Ikea.

 

[Gatsu]

Well its finally done.
The front panels arrived yesterday from FPE so I was able to fit them last night.
I went with dual colour Bulgin momentary switches for the mode buttons.
Blue

Green

The control of the amp is done using a Picaxe18+driver chip to handle the LEDs as well as the input/output/muting relays.
The volume control is a Joshua Tree. I migrated the parts from original boards to the custom control board. The relay boards were left unchanged.

As I mentiond before, this build was heavily inspired by one of Namaanf's previous Beta22s.

Now I need to convert all my phones to balanced

 

[FallenAngel]

Beautiful build, congrats!

 

[rds]

Wow, that is awesome on so many levels

Very nice font too!

 

[Gatsu]

Thanks guys

Just don't look under the control board, its a mess with the modifications I had to make.

 

[johnwmclean]

Gatsu, LEGENDARY BUILD. I would love to see the psu innards as well. How long in the making? Congratulations