A twisted tale about a logarithmic relay attenuator - Page 11 - diyAudio
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Old 9th March 2006, 01:48 PM   #101
Nordic is offline Nordic  South Africa
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Lol Brian, we appreciate what you guys do....

Another question... Could boards be so adjusted that one can use balanced or unbalanced inputs, say, flipping a switch.
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Old 9th March 2006, 01:51 PM   #102
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Yes, it works that way automatically. If you set it up for balanced opperation (two relay boards), single ended inputs will work fine.
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Old 9th March 2006, 02:00 PM   #103
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Can you guys make a PCB to adapt a Lorlin rotary switch that can switch the input with one contact and switch on LEDS with the other contact.
Something like the Aleph P would be cool where the LEDS are in a circle or line beside or above the selector knob.
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Old 9th March 2006, 02:28 PM   #104
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Quote:
Can you guys make a PCB to adapt a Lorlin rotary switch that can switch the input with one contact and switch on LEDS with the other contact.
For the attenuator or the source selector?

For the attenuator, we use a pot, not a rotary switch, so that would not work.

For the source selector (Darwin) you could do it with a single deck rotary switch. Just run GND to the switch's common, then from each position tap back to the darwin input header. Then run +5V to the LEDs+ (common) and a resistor from the switch taps to the LED-. There is no audio signal going through the switch, so no worries there, and the switch can be a cheaper unit.
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Old 14th March 2006, 02:06 PM   #105
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So, about the kit resistors...

Russ and I have talked it over quite a bit. I am currently planning on including Phoenix MRS .6W resistrs in the kits. Here's the
datasheet.

We also discussed Dales (RN60), but they are fairly large for this board. Comments?
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Old 14th March 2006, 02:11 PM   #106
joster is offline joster  United States
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'fairly large' as in uncomfortable, or won't fit?
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Old 14th March 2006, 02:26 PM   #107
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Quote:
Originally posted by joster
'fairly large' as in uncomfortable, or won't fit?

They will fit, but not as well. RN55s would fit better.

The Pheonix I think are the best choice.
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Old 22nd March 2006, 06:53 PM   #108
jleaman is offline jleaman  Belgium
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For this to work you have to use 2 boards right ? because it is balanced input. You'll need one board per input.?
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Old 22nd March 2006, 06:57 PM   #109
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For balanced operation, yes, two relay boards. For Single Ended, one relay board.
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Old 22nd March 2006, 06:59 PM   #110
jleaman is offline jleaman  Belgium
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Quote:
Originally posted by BrianDonegan
For balanced operation, yes, two relay boards. For Single Ended, one relay board.

One more question. This will allow me to use regular rca in and use balanced out right. ? I'm new to this balanced stuff.
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