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Old 2nd January 2006, 11:46 PM   #1
lgreen is offline lgreen  United States
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Default X-CCS-BOSOZ Finished with Pics

Well, here is the "new" BOSOZ.

Its the X-CCS-BOSOZ using Kari's boards.

I ripped apart my prior bosoz and installed the new boards. Becuase every square mm of space was used, I had to make an external power supply, and suddenly space was not a problem.

This is dual mono, 2 balanced inputs, 2 SE inputs, 2 bal output, 2 SE outputs in parallel. There is also 1 SE output using INA134s, and one of the inputs is a DRV134 input. There are a LOT of ultrabright LEDs, each one has its own current limiting resistor, and many have variable resistors for this. All can be switched off, to reduce "noise" although you can't measure or hear any noise increase with all the LEDs on.

So on with the pics, many are very large hires, and you can see them at my website:

Pic #1- Hires Front View with LEDs "on"

Pic #2- Gears- closeup

Pic #3- Hires Rear View

Pic #4- X-CCS-BOSOZ Inside Its kind of a bird's nest but all the wiring is either DC or for momentary pushbutton actuation of relays, so there is no noise problem.

Pic #5- Hires Power Supply Inside

Pic #6- Hires Front View- LEDs "off"

Pic #7- Hires Gear backlighting

Pic #8 - Testing With the Krell KSA 50 Clone

I felt kind of guilty ripping apart my hand soldered perfboards and using PCBs, but what the heck, progress is progress right? If it sounds better it will be worth it, but have not listened very much yet.

On to the Aleph X. Comments?
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Old 3rd January 2006, 05:24 AM   #2
steenoe is offline steenoe  Denmark
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Thats a nice preamp, lgreen Those gears look cool. Fond of blue LED's are we

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Old 3rd January 2006, 06:33 AM   #3
GlouBou is offline GlouBou  France
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Do you like spagettis ???

Perhaps a better disposition sounds better ???

@+ GlouBou
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Old 3rd January 2006, 06:37 PM   #4
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How did you do the lettering on the front panels?

My local trophy/engraver guy is just too...

...let's just say that it's a chore to deal with him.
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Old 3rd January 2006, 06:47 PM   #5
lgreen is offline lgreen  United States
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Default leds

Originally posted by GlouBou

Do you like spagettis ???

Perhaps a better disposition sounds better ???

@+ GlouBou
I guess we can conclude that I am a hack.

The signal path is actually quite short, inputs to 4PDT relay board to preamp boards, to vol control, to output, using cloth/silver or teflon/silver wires. The mess'o'wires are mainly due to the momentary pusbutton switches, which supply a 9 conductor (8 bit) "word" to the relay boards to "set" and "reset" all the latching relays depending on what button you hit. There are 2 sets of latching relays, one for the inputs and one for the LED that lights above the currently active selection. Ok, there are a lot of other wires too, for the LEDs and INA and DRV boards.

What can I say? This is DIY and you get to make stuff like yout want to, and I wanted a lot of lights. Tacky? Yes. Just like I wanted it? yes! ok, not really, didn't know that they would be that bright! You ain't gonna see one of these in a store!

The faceplate (front and back) were done by www.frontpanelexpress.com. They are not perfect but they came out pretty good.
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