Salas hotrodded blue DCB1 build - Page 282 - diyAudio
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Old 1st March 2013, 06:44 PM   #2811
mantha3 is offline mantha3  United States
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Staffan,

Interesting build and it looks interesting. What are you building? 8 channel buffer? 4 channel buffer for balanced XLR ?

Just curious what your 4 PCB1s are built for.
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Old 1st March 2013, 06:53 PM   #2812
stajo is offline stajo  Sweden
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Its intended for serving both 2 channel music and multi channel movie. I havent decided on setup finally yet, right now Im leaning on 5.1 with side channels balanced. I think the real build will use 2 trafos so I can turn on the balanced stereo and multichannel channels separately.

Got me some used lightspeeds, 4 stereo boards but the optos doesnt seem to match that well. Thats next step.

/Staffan
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Old 1st March 2013, 09:01 PM   #2813
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Hi Salas

From your post below - do you (or anyone) have a link to the mini survey regarding BOM parts?
Here's another interesting thread on a DCB1 build and discussion on upgrading components.
Howlin's Pre build Blog - Page 3


Quote:
Originally Posted by Salas View Post
The red Wimas in the particular type and value came out best in a mini survey we run among some users in the past to recommend in the BOM. Best among proven and widely available industrial options in manageable sizes and prices though. Having an ultra pot you may be interested in some Teflon mix was my drift. About the black box Wima I have no direct comparison experience to convey.
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Old 1st March 2013, 09:21 PM   #2814
Salas is offline Salas  Greece
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It was some posts somewhere in the DCB1 threads not a specific thread.

P.S. The link shows some nicely recorded build cost subjective comparisons. Can't beat the British on homing in to best value. The 5leds bypass position wasn't under attention in that case. Some wrong description of the Mez though. Thanks for that info.
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Old 2nd March 2013, 07:39 AM   #2815
stajo is offline stajo  Sweden
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Half OT maybe but does anybody has a nice suggestion on how to split a signal after B1 best way? A circuit, a line trafo?

Its for dual subs.

best regards
Staffan
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Old 2nd March 2013, 10:38 AM   #2816
Salas is offline Salas  Greece
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100 Ohm buffer resistors Y split to start with.
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Old 2nd March 2013, 12:31 PM   #2817
RKH is offline RKH  United States
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Quote:
Originally Posted by Salas View Post
100 Ohm buffer resistors Y split to start with.
Apologies for the naive question... does this effectively give the DCB1 dual/parallel outputs?

Thanks,
Ryan
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Lighten up while you still can ...
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Old 2nd March 2013, 12:38 PM   #2818
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This is what I use. No problem. 100R.
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Salas Boards 2014 #2 SHIPPED |F5TC board and power supplies available PM | Hot-Rod DCB1 boards and kits available PM |Mesmerize kits available (no boards)
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Old 2nd March 2013, 03:01 PM   #2819
stajo is offline stajo  Sweden
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Thanks. Yea I think its a good solution as long at it doesnt give any impedance problems to the next stages. I guess mine are around 20 K so it wouldnt be a problem.

Staffan

Last edited by stajo; 2nd March 2013 at 03:15 PM.
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Old 2nd March 2013, 03:27 PM   #2820
mantha3 is offline mantha3  United States
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I'm also looking to do 1 pair R/L of RCA inputs to 2 pairs of R/L of RCA outputs after the PCB1. I'm running my PCB1 as just a buffer having no vol control. I was going to run the RCA in to the DCB1 and then run two pairs of outputs

I'm going to run on output R/L to a tube amp with 180K input impedance and then the other output R/L to a plate amp (28K input impedance) running a sub.

The 100R resistors run on the ouput.. Is this for situations like I have where the two amps i'm driving are so far apart on input impedance?


For the Right channel as an example. Would I run the + output of a R channel to two 100 R resistors and then one resistor to the 1 Right RCA + output and then the next resistor to the other 1 Right RCA + output?

I
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