BBM Rotary MiniDIGI/DSP Input Selector Switch

thunk303 · 03:38 AM

I am sure this has been covered elsewhere and if so please link to the thread.

I made this thread as a reference for anybody using the same kit combo to be able to buy the correct switch at a reasonable cost from an international supplier.

I have read the miniDIGI manual and understand how the process will work (correct me If I wrong) but I want to find the correct switch to do the job.

The switch needs to be:
a) 2 Gang
b) 6 Position (eg...4x Digital + 2 x Analogue)
c) Break Before Make (BBM)
d) 5/6mm(Dia) (~20mm(L)) Shaft

The idea is to have one gang doing the input selection whilst the second gang selects between digital and analogue.

Has anybody found/know of the correct switch to do this?

Cheers
Dean

PS. I will post pictures of the switch setup if and when I find it.

thunk303 · 03:15 AM

This PDF shows some options:

http://www.lorlin.co.uk/PDF/CK.pdf

This one looks like it should do the job and there is a list of international suppliers:

http://octopart.com/ck1030-lorlin-2153840

I will wait for some feedback from the miniDSP team + others before going further.

thunk303 · 03:36 AM

The idea with the Digital/analogue selection on the second gang is to simply bridge the first 4 tabs for digital and bridge the last 2 for analogue. So as the first gang is choosing the input the second gang will make/hold the digital/analogue selection.

Again, correct me if am wrong or If anybody has a better idea?

Cheers
Dean

thunk303 · 14th June 2012, 08:06 AM

I'll take that as a resounding YES..

curryman · 14th June 2012, 09:41 AM

The Lorlin switch will work fine (2 pole, BBM!). You should use short wires, since the cables will carry the SPDIF/I2S signal and long cables may be bad for signal integrity.
Please note that analog/digital switching as described in the miniDIGI manual will only work for the 2x4 range (not 2x8 or 8x8)!

thunk303 · 14th June 2012, 10:14 AM

Cheers curryman, I will order the switch now. Thanks also for the advice on the cable length.

If the cables were made too long and the signal integrity was compromised, what problems would I expect to encounter? Just in case...

Cheers
Dean

14th June 2012, 02:40 AM	#1
thunk303 diyAudio Member Join Date: Mar 2005 Location: Eltham, Melbourne, Australia	BBM Rotary MiniDIGI/DSP Input Selector Switch I am sure this has been covered elsewhere and if so please link to the thread. I made this thread as a reference for anybody using the same kit combo to be able to buy the correct switch at a reasonable cost from an international supplier. I have read the miniDIGI manual and understand how the process will work (correct me If I wrong) but I want to find the correct switch to do the job. The switch needs to be: a) 2 Gang b) 6 Position (eg...4x Digital + 2 x Analogue) c) Break Before Make (BBM) d) 5/6mm(Dia) (~20mm(L)) Shaft The idea is to have one gang doing the input selection whilst the second gang selects between digital and analogue. Has anybody found/know of the correct switch to do this? Cheers Dean PS. I will post pictures of the switch setup if and when I find it. Last edited by thunk303; 14th June 2012 at 03:38 AM. Reason: Clarity

14th June 2012, 03:04 AM	#2
thunk303 diyAudio Member Join Date: Mar 2005 Location: Eltham, Melbourne, Australia	This PDF shows some options: http://www.lorlin.co.uk/PDF/CK.pdf This one looks like it should do the job and there is a list of international suppliers: http://octopart.com/ck1030-lorlin-2153840 I will wait for some feedback from the miniDSP team + others before going further. Last edited by thunk303; 14th June 2012 at 03:15 AM.

14th June 2012, 03:34 AM	#3
thunk303 diyAudio Member Join Date: Mar 2005 Location: Eltham, Melbourne, Australia	The idea with the Digital/analogue selection on the second gang is to simply bridge the first 4 tabs for digital and bridge the last 2 for analogue. So as the first gang is choosing the input the second gang will make/hold the digital/analogue selection. Again, correct me if am wrong or If anybody has a better idea? Cheers Dean Last edited by thunk303; 14th June 2012 at 03:36 AM. Reason: Clarity

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14th June 2012, 08:06 AM	#4
thunk303 diyAudio Member Join Date: Mar 2005 Location: Eltham, Melbourne, Australia	I'll take that as a resounding YES..

14th June 2012, 09:41 AM	#5
curryman diyAudio Member Join Date: Aug 2010	The Lorlin switch will work fine (2 pole, BBM!). You should use short wires, since the cables will carry the SPDIF/I2S signal and long cables may be bad for signal integrity. Please note that analog/digital switching as described in the miniDIGI manual will only work for the 2x4 range (not 2x8 or 8x8)!

14th June 2012, 10:14 AM	#6
thunk303 diyAudio Member Join Date: Mar 2005 Location: Eltham, Melbourne, Australia	Cheers curryman, I will order the switch now. Thanks also for the advice on the cable length. If the cables were made too long and the signal integrity was compromised, what problems would I expect to encounter? Just in case... Cheers Dean

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