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Post by tonecraft on Mar 29, 2014 20:08:27 GMT -6
Here's a mixer I built this winter based on a pair of 8 channel Sphere Eclipse Mic Pre boards. I added custom balanced line receiver boards, Cinemag steel core output transformers, an external power supply (including +5v for circa 1978 CMOS driven reed relays) and a ton of point to point wiring! It was my first time using Front Panel Express and I was very happy with the quality. There we're some challenges with this unit, but it all eventually came together. Jon Erickson  Attachment DeletedAttachment Deleted |
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Post by tonycamphd on Mar 30, 2014 9:01:48 GMT -6
Here's a mixer I built this winter based on a pair of 8 channel Sphere Eclipse Mic Pre boards. I added custom balanced line receiver boards, Cinemag steel core output transformers, an external power supply (including +5v for circa 1978 CMOS driven reed relays) and a ton of point to point wiring! It was my first time using Front Panel Express and I was very happy with the quality. There we're some challenges with this unit, but it all eventually came together. Jon Erickson That is friggin nice!! If you don't mind me asking, what did that set you back $ approx, looks like a fun(pretty difficult)project. As far as i can see, the toggles are 48v and phase, the level knob is obvious, i'm assuming the push buttons above the level knob are L/C/R? what are the one above that, pad? great job man! |
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Post by masteroftracks on Mar 31, 2014 14:51:11 GMT -6
Sphere console pres worked on a series of pads instead of the normal gain knob associated with most mic pres. I would assume that's the buttons above the knob and the knob itself a rotary fader. And to the OP that is just beautiful!
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Post by Cyrus Melchor on Apr 1, 2014 4:27:06 GMT -6
Wow that's beautiful. Great great work.
I recall back in 2000 there was a Sphere 24 channel Eclipse on the Recycler classfieds for 2000 bucks.
I was strapped at the time and damn don't I regret not just pulling out of a supposed untouchable savings account.
BTW, my first post here clearly, so HELLO.
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Post by tonecraft on Apr 1, 2014 12:18:06 GMT -6
Sphere console pres worked on a series of pads instead of the normal gain knob associated with most mic pres. I would assume that's the buttons above the knob and the knob itself a rotary fader. And to the OP that is just beautiful! Thank you! Yes, the Sphere Eclipse used a combination of 20db and 30db resistive pads plus a set of 3 more pushbuttons that lowered the gain 2,5 or 10db using feedback in a non inverting op amp setup. It's really not that different from what you would see with Quad Eight or API just done with all switches. The pot is a rotary fader and the previous poster was right about the 48v and pad. Not cheap to build at about $150/channel, not including the original mic pre boards. These boards included the Reichenbach input transformer and SPA-62 op amps. I also swapped out all the pushbutton swictghes. The Hakko 808 desoldering gun came in very handy! I was lucky to grab an Eclipse board years ago that was too far gone to be put back together whole, but full of great modules and parts. This rack is the end of that stash. Parts found new life in racks I built and many other DIY projects around the world. Here's some pics of one the Sphere 920 EQ racks I built.   |
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Post by tonycamphd on Apr 1, 2014 15:08:38 GMT -6
Wow that's beautiful. Great great work. I recall back in 2000 there was a Sphere 24 channel Eclipse on the Recycler classfieds for 2000 bucks. I was strapped at the time and damn don't I regret not just pulling out of a supposed untouchable savings account. BTW, my first post here clearly, so HELLO. welcome Cyrus!! |
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Post by tonycamphd on Apr 1, 2014 15:11:21 GMT -6
Sphere console pres worked on a series of pads instead of the normal gain knob associated with most mic pres. I would assume that's the buttons above the knob and the knob itself a rotary fader. And to the OP that is just beautiful! Thank you! Yes, the Sphere Eclipse used a combination of 20db and 30db resistive pads plus a set of 3 more pushbuttons that lowered the gain 2,5 or 10db using feedback in a non inverting op amp setup. It's really not that different from what you would see with Quad Eight or API just done with all switches. The pot is a rotary fader and the previous poster was right about the 48v and pad. Not cheap to build at about $150/channel, not including the original mic pre boards. These boards included the Reichenbach input transformer and SPA-62 op amps. I also swapped out all the pushbutton swictghes. The Hakko 808 desoldering gun came in very handy! I was lucky to grab an Eclipse board years ago that was too far gone to be put back together whole, but full of great modules and parts. This rack is the end of that stash. Parts found new life in racks I built and many other DIY projects around the world. Here's some pics of one the Sphere 920 EQ racks I built. great stuff!!! btw, how does anyone live without the 808? |
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Post by masteroftracks on Apr 1, 2014 17:36:43 GMT -6
Love love love those Eq's!!!! Nice build!
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Post by tonycamphd on Apr 1, 2014 22:06:34 GMT -6
Love love love those Eq's!!!! Nice build! it seems to be levitating as if it were magic! |
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Post by masteroftracks on Apr 2, 2014 7:35:23 GMT -6
Love love love those Eq's!!!! Nice build! it seems to be levitating as if it were magic! That's from all the extra air they give your sound! When the aren't patched in, they float! |
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