Poll! What do you use in your X-BOSOZ or BOSOZ for Volume Control and Input Selector? - diyAudio
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Old 29th January 2006, 09:15 PM   #1
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Default Pole! What do you use in your X-BOSOZ or BOSOZ for Volume Control and Input Selector?

Hi everybody!
I am kinda puzzled with what I should use for volume control and input selection.
I would like to have a balanced volume control so that doesnt allow the use of normal pots.
I dont like chip volume controls so that leaves me to a relay attenuator.
I dont have a clue how to programm a microcontroller so it kinda hard to find a solution.
does anybody have an idea?
or what are you using in your preamp?

Would really like to hear from you guys?
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Old 29th January 2006, 09:52 PM   #2
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Old 29th January 2006, 10:53 PM   #3
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wow!
that must be balanced right?
How many positions?
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Old 29th January 2006, 11:34 PM   #4
BDP is offline BDP  United States
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Look at this thread.

[http://www.diyaudio.com/forums/showt...347#post258347

BDP
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Old 30th January 2006, 01:47 AM   #5
moe29 is offline moe29  United States
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as i'm still searching for relay volume control that i could build...

i use the pots described in the original BZLS article
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Old 30th January 2006, 02:06 AM   #6
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I used a 4-deck 23 position switch to build a series stepped attenuator that I connected to the circuit output. Soldering 96 resistors took a bit of time, but I am very happy with the results.

I got the switch HERE along with resistors.

Cheers, Terry
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Old 30th January 2006, 02:15 AM   #7
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I'm planning to use Mikkel's (Dantimax) products. Thread here . Actually I already have the parts; and they look good.
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Old 30th January 2006, 08:03 AM   #8
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I'm still thinking (and hoping for some advice).

I dont really need a remote, but I do want 2 balanced and 3 single ended inputs (and top quality).

My options:

- Go DACT all the way and pay the price (230 euro for a 4-deck volumecontrol only)

- Thel CP-2500 pot - 85 euro for 2 deck (of 109 met motor). I don't know if they sell a 4 deck pot for balanced control. Onky volume control, so you haved to add a input selector.

- use a relay based kit, such as :
Dantimax RelVol3 - 48 euro (only volume) + input2 - 75 euro (2 balanced, 3 single endend)? PS (30 euro) en remote control (24 euro) or so. According to the pictures this includes XLR and RCA inputs.

Or some of the stuff from Diyclub biz
V3310 balanced - $68
V03 - $160 NS V03 - $260 with Holco resistors (actually don't know whats the difference).

- Look at what Russ White is designing. probably the best option if there will be some sort of kit. I understand its just volume control.

What I would like to know, soundwise is a DACT still the best??
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Old 30th January 2006, 09:09 AM   #9
Kari is offline Kari  Sweden
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I'm using V-03 from diyclub

It also has a input selector which you have no use for if this volumecontrol is used after the preamp. However it is possible cut 1 trace per board to bypass this and use the selector.

/Kari
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Old 30th January 2006, 09:46 AM   #10
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Promitheus,

Im using a simple balanced, stepped output attenuator made out of an old Elma switched attenuator.

It is simple (only two decks), you have only 1 resistor in the signal path and can make this as high quality as you want. And, it is always perfectly balanced by design.

Mine uses two 1k2 resistors as series elements and 22 1% metalfilm resistors as shunting elements. (plus one open and one closed position for mute and very loud)

Ive got an excel sheet somewhere to calculate the attenuation in dB and the output impedance of each step.

William
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