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Old 10th January 2003, 07:00 PM   #11
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Hi muralman1 and fellow Apogee user,

Let's convince Nelson Pass to give us a DIY X-600. Should make my day every day in the week. Just imagine if we could bi-amp the Scintillas with four X-600's.

Thomas B
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Old 10th January 2003, 07:24 PM   #12
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Yo Thomas, yeah, if we only could. Building a 1 0hm amp is expensive. One needs serious heat sinks, lots of capacitance, and some proprietory scans.

fcel, there are many die hard Apogee fans out there who are scared to death over life after Apogee. I know of two sources for Apogee repair and parts. I just happen to have, ahem, a near mint Duetta Signature for sale. I powered it beautifully with a Pass X-150. I used a 100 watt tube amp on my
Apogee Stage speakers.

Hope to hear from you.
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Old 10th January 2003, 08:06 PM   #13
Cobra2 is offline Cobra2  Norway
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Cool Apogee

Quote:
I know of two sources for Apogee repair and parts.
Please, can you list them?
I have the Apogee Duetta, and I'm thinking of upgrading them to
Mk.2 Sign.

Arne K
NORWAY
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Old 10th January 2003, 08:38 PM   #14
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graz@graz.com.au.

and

apogeeribbons@yahoo.com

Goodluck!
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Old 12th January 2003, 02:25 PM   #15
fcel is offline fcel  United States
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I find a lot of good Apogee speakers information here http://208.51.252.167/
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Old 12th January 2003, 03:53 PM   #16
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Default Apogee sites

That's a good one Fcel. In it one will find everything archived that one wants to know about all Apogees, including reviews, manuals, and personal testimony.

Here is another one, a users forum site:

http://audioworld.com/cgibin/sw/foru...er=1&SUBMIT=Go

I'll ship my Duetta Signatures to any place in US
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Old 13th January 2003, 06:06 PM   #17
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Quote:
Originally posted by Thomas B
Let's convince Nelson Pass to give us a DIY X-600. Should make my day every day in the week. Just imagine if we could bi-amp the Scintillas with four X-600's.
Just order up a full copy of the patent. The schematic there
is an X600, as I recall.
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Old 14th January 2003, 12:47 AM   #18
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Knowing which devices Nelson favors and the ways he likes to run them (voltages, power dissipations, etc.), it's not hard to make deductions. I don't have the patent with me at the moment, but I think the inputs were N-ch MOSFETs.
Make them IRF610s.
There were current sources underneath, but they have to withstand not only the current, but a fair portion of the rail voltage at the same time and the dissipation is going to be a bit higher. The IRF610 might work, but it'd be getting a bit warm, not to mention pictures showing a bunch of TO-247s, so...
Make them IRFP240s.
Since it's cheaper to buy things in bulk, Nelson's going to have a handful of 9V Zeners at his elbow. Unless there's a reason not to, begin by assuming that Zeners are 9.1V parts.
And so on.
You may be right, you may be wrong, but it'll give you a good excuse to rummage through the circuit and play with it. Build it from the front end outwards and remember Nelson's words from the DIY opamp paper (paraphrased broadly): None of these parts are really all that expensive. Don't be afraid to burn a few. As long as you don't toast the transformer or power supply caps, you're only out a few bucks and some time.

Grey
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Old 23rd February 2010, 09:52 PM   #19
a.wayne is offline a.wayne  United States
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Quote:
Originally Posted by Nelson Pass View Post
It's not actually that difficult to build an amp that will drive
the Scintillas; you just have to get medieval about it.

I'm all ears ...........
__________________
World Cup Cat Hacky Sack given to Messi and with 30seconds to go D Germans and the rest of Europe save face ..
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Old 8th February 2011, 04:08 PM   #20
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Default An AMP for Scintillas ....

Me also ......
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