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Roll Call: Who's building, built, or thinking of building a beta22? - Page 2

post #16 of 2875
6/15/07 at 9:37pm
I'm planning on building one this summer if I get the money for it fast enough. I also need to work out a crazy switch setup too.
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post #17 of 2875
6/15/07 at 9:45pm





(click pictures for larger versions)

Single-ended, active ground beta/sigma combo. Uses an alps RK40 pot, has two switched inputs, speaker binding posts (not shown in pictures) and otherwise is pretty much stock.

Planning for my balanced beta gets underway this weekend.
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post #18 of 2875
6/15/07 at 9:48pm
im just about to start building the S22 for a B22 that will EVENTUALLY come :P. im building it in its own par-metal 20 series enclosure and throwing a 100VA transformer in, as im planning (or at least at THIS point), to build the 4 channel balanced b22. ill definitely post further as i make progress!
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post #19 of 2875
6/15/07 at 10:03pm
Nice to see everyone building/planning!
It'll be in my books also. I think I've decided on the case for the Beta and Sigma.
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post #20 of 2875
6/15/07 at 10:10pm
hey mb3k, fill us in, what cases have u decided on?? OK, this is probably a good place to ask this question, for the umbilical between S22 and B22 housed in separate enclosures, two things. what is a good cable for that umbilical. can someone recommend something that is available to order (to canada please) in short enough lengths for just this purpose (i dont want a ton of extra)!, or do you guys just find using something like 18AWG hookup wire, braided and in techflex or w/e, is ok? also, link to some of those amphenol tuchel detachable connectors for the panels and the umbilical? THANKS guys
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post #21 of 2875
6/15/07 at 10:49pm
Thread Starter 
quoting from Amb's post over at headwize about his dynahi build, I suspect the same connectors could be used for the beta22:

Quote:
I received several queries about the Amphenol connectors that I used for the umbilical cable between the PSU and amp cases. Here is the detailed info. Two of each is needed:

Amphenol-Tuchel T3108 001
(male, cable-mount, Digikey 361-1026-ND or Mouser 523-T3108-001)
Amphenol-Tuchel T3111 000
(female, panel-mount, Digikey 361-1032-ND or Mouser 523-T3111-000)
Given I'm planning a 6 board setup I think I may have to get more than 2 umbilical cords
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post #22 of 2875
6/15/07 at 10:55pm
Quote:
Originally Posted by el_matt0 View Post
for the umbilical between S22 and B22 housed in separate enclosures, two things. what is a good cable for that umbilical.
I'd recommend the Neutrik SpeakON connectors!
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post #23 of 2875
6/15/07 at 10:55pm
ok thanks, im all clear about the connectors now, seems striaghtforwards...now about the wire? what do you guys find has worked best for you, braiding hookup wire of your own, or using _____ cable? (thats where you insert a link to a good cable :P!) cheers everyone
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post #24 of 2875
6/15/07 at 11:05pm
Quote:
Originally Posted by thrice View Post
Just finished a 6-channel balanced in two cases. There are pics:





I've since added the ground boards to the amp and single-ended inputs.
Does your setup use 3 boards per channel n the balanced mode? Or is the 3rd board in each channel used to make 2x single ended active ground amps?
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post #25 of 2875
6/15/07 at 11:17pm
Thread Starter 
Quote:
Originally Posted by MASantos View Post
Does your setup use 3 boards per channel n the balanced mode? Or is the 3rd board in each channel used to make 2x single ended active ground amps?
I am planning to use this configuration so I think I can answer this one...but correct me if I'm wrong thrice

In balanced mode only four boards are used, while in single ended mode it runs as two separate SE active ground amps.
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post #26 of 2875
6/15/07 at 11:29pm
Quote:
Originally Posted by luvdunhill View Post
I'd recommend the Neutrik SpeakON connectors!
these speakON connectors are just a suitable replacement for the amphenol tuchel connectors right? what kind of cable should i be looking to use FOR the umbilical though? braid something myself out of hookup wire and then techflex it..or do you guys prefer an already insulated and shielded pre-twisted cable?
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post #27 of 2875
6/16/07 at 1:52am
Just started my B22 build. I hope to have it all soldered up waiting for the backplane board by next week. Then comes the joy of finding a case I like
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post #28 of 2875
6/16/07 at 4:02am
Quote:
Originally Posted by el_matt0 View Post
hey mb3k, fill us in, what cases have u decided on?? OK, this is probably a good place to ask this question, for the umbilical between S22 and B22 housed in separate enclosures, two things. what is a good cable for that umbilical. can someone recommend something that is available to order (to canada please) in short enough lengths for just this purpose (i dont want a ton of extra)!, or do you guys just find using something like 18AWG hookup wire, braided and in techflex or w/e, is ok? also, link to some of those amphenol tuchel detachable connectors for the panels and the umbilical? THANKS guys
I'll be using the HiFi2000 Galaxy Max cases with the 10mm faceplates.
230x230x80 for the Sigma22 and 330x280x80 for the 3-channel Beta22 w/ backplane.

I've been fooling around with AutoCAD tonight to come up with a way to mount the NJ3FP6C Neutrik jack from behind the panel. Here's some prelim screens



You can see that the back of the panel has to be milled out enough for the jack to poke out.
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post #29 of 2875
6/16/07 at 4:18am
Quote:
Originally Posted by el_matt0 View Post
what kind of cable should i be looking to use FOR the umbilical though? braid something myself out of hookup wire and then techflex it..or do you guys prefer an already insulated and shielded pre-twisted cable?
anyone? quick answer :P
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post #30 of 2875
6/16/07 at 4:21am
Quote:
Originally Posted by el_matt0 View Post
anyone? quick answer :P
The Belden 83803 power cable was something I was looking at. Still undecided if I would go for the Belden, or twist my own.
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