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SC-1 Mic Preamp NOW ON SALE!!!!

After many months of development, testing, troubleshooting, frustration, problems, and accomplishments... the SC-1 mic preamp kit, PSU-1848 power supply kit and power transformer kits are now available for sale!

Click here to ORDER

Photo of a finished SC-1 mic preamp kit!  (Note: XLR jacks and wires shown on picture not included in the kit.)

Features:
- Low-Noise, transformerless, High-Quality Mic Preamp
- All solid-state design, using chipsets from THAT Corp and Burr-Brown
- Soft-start, slow ramp-on +48V phantom power
- Crystal clear Red LED indicator for phantom power
- Electronically balanced input and output stages
- 12-position Grayhill gain selector switch
- Gain range from +6 to +72dB, in 6dB increments
- Input RFI protection
- Input clamping protection
- Output surge protection circuit
- Output RFI protection
... read more...

Download PDF file of Assembly Guide/Kit Instructions

Related products like the PSU-1848 Power Supply Kit, Power Transformer Kit, Power Control Kit are also available for sale. Click here.

 Tuesday, February 26, 2008
Wednesday, February 27, 2008 5:47:28 AM (Central Standard Time, UTC-06:00) ( )
So I bought this AT X800XT card... back when it was $499... the first one after a few short months, the fan got noisy and was dying... I sent it back to ATI, then ATI sent back a faulty unit (blocks appearing on the screen), so I had to resend it back again and then I'm good again for a few months.

This morning, my 2nd monitor (A Samsung) wouldn't come up. Just black. At first I thought my monitor died... bummer. That got me thinking... maybe I should get another 23" Cinema LCD :) The prices have fallen down to $799. (I got mine back at $1999).

Then just to be sure it's the monitor, I swapped things around... and lo and behold, my Samsung monitor was working!

I opened the G5 case, and see that the video card fan was totally dead... not spinning. NOT GOOD. I don't know how many days I've been running with this fan not spinning.

So today I pulled out the X800XT card and put back in my stock video card (fanless) just so I can continue working. It's a good thing to have spares.

I'm not going to bother sending this back to ATI again. I bought some replacement aftermarket fan and will try to fix this thing instead. Remove the junk ATI fan and use another one instead.

Will update this post as I go....

I just hope the 2nd video port isn't permanently damaged.


I just noticed today that due to the failed fan on my video card, it almost fried the components at the bottom of the PCB. Yes, it smell burnt. I was kinda disappointed when I saw this. I'm thinking maybe my video card is fried (literally).





Remove the old crappy fan from my ATI card. This fan sucks. Do you hear that ATI?????




You can see the old thermal paste sticking on the cpu. So we'll need to clean that out.




And here's the clean chip. I just used an old cotton shirt, and an old toothbrush. Wiped it clean and made it shiny.

I'm using a Zalman VF700-Cu Quiet VGA Cooler fan. It's pretty cheap. $20 I think.

It also comes with some blue small heatsinks for the other chips (RAM?) on the card.

The connector of the Zalman fan isn't compatible with the headers on the video card.

So what do you have to do? Get a cutter, cut the wires on the new fan, cut the wires on the old fan and solder them together a'la Frankenstein. :)

I used some heatshrink tubing to insulate the connection. You can see it in the photo below, along with the new blue heatsinks.



Then... the moment of truth... Put it in my G5 and see if it still works. (Remember, the parts at the bottom of the PCB smells burnt and looks a little crispy.

And the result....... IT STILL WORKS! Now my second monitor works, and not shutting down (turning black). I've got good video on both monitors! :)

So that's done... total time, maybe 30 minutes.

Comments | Trackback | # 

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