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Roll Call: Who's building, built, or thinking of building a beta22? - Page 9

post #121 of 2875
7/20/07 at 2:52am
Quote:
Originally Posted by gates_2 View Post
picked up the Relvol1c.... looks cool, and you can use a remote control with it :-D
lots of people in diyaudio has used his kits and I've only seen good feedback. and he is very helpful

3 things I like about the dantimax kit:
1. constant input impedance
2. small size
3. cheaper
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post #122 of 2875
8/5/07 at 4:43pm
Im thinking of building a balanced b22, but I want to be able to run in single ended mode also. How do I wire that up, and what do I have to think about? I bet there are more than a few pitfalls with this setup Also, would a 10K pot be sifficient for the b22?
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post #123 of 2875
8/5/07 at 6:35pm
Quote:
Originally Posted by MrMajestic2 View Post
Im thinking of building a balanced b22, but I want to be able to run in single ended mode also. How do I wire that up,
See "Other options" section at the β22 webste.
Quote:
Also, would a 10K pot be sifficient for the b22?
See "Parts list" section at the β22 website.
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post #124 of 2875
8/5/07 at 6:40pm
Quote:
Originally Posted by amb View Post
See "Other options" section at the β22 webste.

See "Parts list" section at the β22 website.

Thanks AMB, I found it after posting the question. Next time Ill know better I found a quad Alps RK27 on german ebay that is only available in 5 or 10K. Pretty good price too:

http://stores.ebay.com/familygate
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post #125 of 2875
8/5/07 at 8:21pm
Quote:
Originally Posted by amb View Post
See "Other options" section at the β22 webste.
hey amb,
i saw that in your schematics for combined balanced and single-ended operation the bal. and SE inputs are shorted, without a switch. wouldn't that create the problem of the sources "driving" eachother and causing potential damage, due to the amps high input- and the sources' lower output impedance?
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post #126 of 2875
8/5/07 at 9:53pm
Have the boards for a se b22 but am revisiting building a balanced/se combo in its place. Might as well go all out on it and the reviews are great.
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post #127 of 2875
8/5/07 at 10:36pm
I am working on a three channel version. Received my E22 backplanes this weekend and hope to have it up and running sometime this week.
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post #128 of 2875
8/6/07 at 1:34am
Quote:
Originally Posted by Dorder View Post
i saw that in your schematics for combined balanced and single-ended operation the bal. and SE inputs are shorted, without a switch. wouldn't that create the problem of the sources "driving" eachother and causing potential damage, due to the amps high input- and the sources' lower output impedance?
The balanced and unbalanced inputs are not meant to be used simultaneously. If you want to have them plugged in at the same time, then a switch should be used.
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post #129 of 2875
8/8/07 at 12:55pm
Selling my little Eddie Current to build this amp/PS. Should be a great project for the impending winter (yes, in Canada we think about that early).

Regarding the full kits available, is it worth it to purchase the kits (from Glass Jar Audio) if I know I'm likely to tinker with upgraded or just plain different parts?
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post #130 of 2875
8/8/07 at 1:08pm
In the building process
Cant wait to lift the Solder iron again


To bad I am missing parts for the s22 so i cant test it
Especially since I am missing the CR1-4 that is almost impossible to source in Sweden (at least to normal prices without super high postage costs)
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post #131 of 2875
8/8/07 at 1:22pm
Quote:
Originally Posted by KerryKing View Post
In the building process
Cant wait to lift the Solder iron again


To bad I am missing parts for the s22 so i cant test it
Especially since I am missing the CR1-4 that is almost impossible to source in Sweden (at least to normal prices without super high postage costs)
Guess what, Im placing an order with Mouser again
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post #132 of 2875
8/8/07 at 1:27pm
Ah sweet music for my ears

guess who is joining
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post #133 of 2875
8/9/07 at 4:58am
Received my E22 backplanes.
Still doing my due diligence / background reading.

Thinking about a 6 channel - balanced / dual SE setup hence the need for 2 backplanes.

Investigating volume control switching options + casework.

Came across these sweet cases - but two E22s won't fit in a stereo case, nor one in a mono - the quest continues.

Also to fit into a standard audio rack the clearance with two boards will be tight.

Q: Anyone know of any cases that could fit two E22's side by side yet not add too much to the total size of the package - suggestions welcome.

Also looking into seeing if remote control of switching / volume is a realistic option - I only intend to do this once, I might as well do it right!

The remote control is overkill for a headphone rig, I know - but this might be a speaker amp as well - hence the remote control being a nice to have.
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post #134 of 2875
8/9/07 at 5:17am
Grahame, have a look at thrice's balanced β22 with two ε22 backplane boards (the pics were taken when only four channels were populated, now he has all six):
http://www.head-fi.org/forums/showpo...postcount=2162

It's a wide case but does fit two backplane boards comfortably.

Here is info about the case:
http://www.head-fi.org/forums/showpo...postcount=2170
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post #135 of 2875
8/9/07 at 5:20am
Quote:
Originally Posted by Grahame View Post
Received my E22 backplanes.
Still doing my due diligence / background reading.

Thinking about a 6 channel - balanced / dual SE setup hence the need for 2 backplanes.

Investigating volume control switching options + casework.

Came across these sweet cases - but two E22s won't fit in a stereo case, nor one in a mono - the quest continues.

Also to fit into a standard audio rack the clearance with two boards will be tight.

Q: Anyone know of any cases that could fit two E22's side by side yet not add too much to the total size of the package - suggestions welcome.

Also looking into seeing if remote control of switching / volume is a realistic option - I only intend to do this once, I might as well do it right!
Wow, those cases look really cool. Too bad the prices are uncool.

To answer one of your questions:
I was checking out some volume options when I stumbled upon a quad version of the Alps Blue velvet on ebay. Its also available in a motorized version.
http://stores.ebay.com/familygate
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