Django (BD-Design)

by GC, Sunday, January 23, 2005, 18:00 (4743 days ago)

Has anybody out there assembled/have a Django or other Billings Stevens transf. volume control? I think I must have made a wiring error in the assembly. The system sounds cotton woolly with it in, and with it out, sounds fabulous. Luckily the output of the Twindac and TS SEOTL into the the MD3s gives just the right volume to be able take the Django out of the circuit. The output of the analogue is too great to judge, but that was also woolly and muffled with the Django in. Any ideas where to start looking for the mistake???

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Django

by Bert @, Thursday, January 04, 2007, 00:45 (4032 days ago) @ GC

Hi Thomas,

Questions:

- Does it make any difference if you switch the +6dB on/off?
- Do you use the same type of interconnects on the in- and outputs?

Ciao,

Bert

--
BD-Design - Only the Best!

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Django

by GC, Sunday, January 23, 2005, 21:14 (4743 days ago) @ Bert

Hi Thomas,

Questions:

- Does it make any difference if you switch the +6dB on/off?
- Do you use the same type of interconnects on the in- and outputs?

Ciao,

Bert

I get the extra gain on the 6 db, but still it stays woolly. The earth selector does not seem to make much diff. Could I have messed up there? All volume settings work fine, but all sound are woolly. The piano sounds as if there were a piece of wool under each hammer!! All interconnects are Siltech 1000$US from the previous system.

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Django

by Bert @, Thursday, January 04, 2007, 00:48 (4032 days ago) @ GC

I get the extra gain on the 6 db, but still it stays woolly. The earth
selector does not seem to make much diff. Could I have messed up there?
All volume settings work fine, but all sound are woolly. The piano sounds
as if there were a piece of wool under each hammer!! All interconnects
are Siltech 1000$US from the previous system.

Last questions to rule things out before digging in the Django...

- What is the input impedance of your main amplifer?
- Do you have zero resistance between the ground of all connected interconnects?
- any "filters" present in the interconnects or are these relative simple straight wires?

Ciao,

Bert

--
BD-Design - Only the Best!

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Django

by GC, Monday, January 24, 2005, 21:00 (4742 days ago) @ Bert

I get the extra gain on the 6 db, but still it stays woolly. The earth
selector does not seem to make much diff. Could I have messed up there?
All volume settings work fine, but all sound are woolly. The piano

sounds

as if there were a piece of wool under each hammer!! All interconnects
are Siltech 1000$US from the previous system.


Last questions to rule things out before digging in the Django...

- What is the input impedance of your main amplifer?

100K

- Do you have zero resistance between the ground of all connected
interconnects?

Will check, BUT.. being non tech ..set meter to ohm and put probes on L and R ch. earths ???

- any "filters" present in the interconnects or are these relative simple
straight wires?

Simple straight thru wires.


Ciao,

Bert

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Django

by Bert @, Thursday, January 04, 2007, 00:50 (4032 days ago) @ GC

- Do you have zero resistance between the ground of all connected
interconnects?


Will check, BUT.. being non tech ..set meter to ohm and put probes on L
and R ch. earths ???

Yep, should measure 0 ohms (or close to ohms). Also measure in- and output chinch of the left and next the same on the other channel.

Ciao,

Bert

--
BD-Design - Only the Best!

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Django

by GC, Tuesday, January 25, 2005, 10:15 (4741 days ago) @ Bert

- Do you have zero resistance between the ground of all connected
interconnects?


Will check, BUT.. being non tech ..set meter to ohm and put probes on

L

and R ch. earths ???


Yep, should measure 0 ohms (or close to ohms). Also measure in- and output
chinch of the left and next the same on the other channel.

Ciao,

Bert

Got something Bert. Inputs all 3 are 0 0 0
Output 1.6K ohms.
So what do I do next??
Thanks
Tom

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Django

by Bert @, Thursday, January 04, 2007, 00:50 (4032 days ago) @ GC

Hi Tom,

Got something Bert. Inputs all 3 are 0 0 0
Output 1.6K ohms.
So what do I do next??

If you measure 1.6kohm between the RCA input and output grounds then you have a floating ground. There is a switch where you can select some ground options and one of these is "floating". In some systems this sounds better (depending on the listener though...)

I would check the switch or by-pass that switch making direct connections between the RCA grounds.

Ciao,

Bert

--
BD-Design - Only the Best!

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Django

by GC, Tuesday, January 25, 2005, 17:01 (4741 days ago) @ Bert

Hi Tom,

Got something Bert. Inputs all 3 are 0 0 0
Output 1.6K ohms.
So what do I do next??


If you measure 1.6kohm between the RCA input and output grounds then you
have a floating ground. There is a switch where you can select some ground
options and one of these is "floating". In some systems this sounds better
(depending on the listener though...)

I would check the switch or by-pass that switch making direct connections
between the RCA grounds.

Ciao,

Bert

Bingo!! Thanks Bert. Wow, what magic at O ohms for ALL the earths. Guess the switch may have been faulty or the wiring tricked me.

Will send in report soon, now that I have MUSIC!!

Thanks again

Tom

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