x-BoSoZ volume on in or output

[yoke]

Hi...
Well I am building X-BoSoZ by Henrik schematic...now I'am thinking of buying series attenuator for it and have some questions...

I remember reading some where that Nelson Pass likes putting pot. on the output , after everything is said and done...but in Henrik schematic it's on Input...Should I use it on input or output ???
I mean...probably I would need to use on input any way , but for volume control , should I use attenuator on input or output ???

and If I'am gona use it on output for which value I should go ??? In BZL stage Mr. Pass wrote 5KOhm...

Thanks

[Variac]

What amp are you driving?

[yoke]

It will be Aleph-X

[wuffwaff]

Hi,

you could use a balanced output attenuator if you´re driving an Aleph-X. I use one in my x-bosoz to drive my Aleph 5.

William

[yoke]

Hi wuffwaff ...
What value are you useing on output ?

[yoke]

[till]

i use this at the output of my BZLS : http://home.tu-clausthal.de/~tpa/relais/index.html

[wuffwaff]

Hi,

I´m using 2 x 2k2 as output series resistors. You have to calculate the value for the stepped attenuator in between to get the steps you want. Using a standard log pot doesn´t work because it is way too sensitive at low values and you will always have one channel that´s still playing when the other one is already off.

William

[Variac]

OK, so you have output resistors in there, then short between the outputs. Yoke & I are probably using stepped attenuators, which appear to be the best for this approach, as the channel tracking is very good.

Now I guess our problem is as you say- what are good values to get a reasonable range of control with say 24 steps with this shorting approach?

[wuffwaff]

Hi,

well the first step needs to be shorted (for silence) The last one open (for max. output). In between I would go for 3dB steps top down and maybe 6dB for the last 2 or 3 steps.
If you know wich output resistors you will use you can just calculate the value of the shorting resistor for any given dB value.

William