DIY High or Low Ouput Moving Coil Phono Stage
- Thread starter HypnoToad
- Start date
It's a fully functional RIAA MC phono stage, no need for a step-up transformer.
Fasterdamnit
Super Member
+1. My AT650 is back in it's box.
ghazzer
Senior Member
That is about the most glowing report of audio gear I can remember in many a year. I'm just happy for you that your ears can discern all these suttle variations.
Enjoy - - -
Big Bill
Summertime Rolls.....
Judging from what I've heard from Jim's MC board and his Denon LOMC, I'm convinced this is without a doubt the way to go. My board was assembled today and tomorrow I'll be swapping the Bugle 18V power supply from my Bugle pre over to this board. As luck would have it, my new Ortofon Rondo Red LOMC cart came in the mail today so hopefully I'll be able to post my impressions of my MC board with my own gear sometime soon.
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jmathers
Super Member
Yes, that's a good question. I'd like to avoid the battery power supply myself.
Jeff
Pio1980
AK Member
Richard's boards come with his filtered power supply section minus the rectifiers and primary filter/accumulators, suggesting12VDC +/- inputs. Rod Elliott at ESP has a suitably clean power supply board at 15 volts +/-.
http://sound.westhost.com/project05b.htm
The muting drive ckt is optional and not needed for this project as-is..
http://sound.westhost.com/project05b.htm
The muting drive ckt is optional and not needed for this project as-is..
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marantzfan
...
Very interesting. :yes:
Richards power supply section is called a power conditioner and looks very good, as Steve said it's part of his boards less the transformer and rectifiers.
Here is one of Richards boards again (you need two of these per phono stage) with the power supply section in the red box. For all those that want to learn more about the PSU or get some of his boards go here, I have no affiliation with Richard at all, I just bought two of his boards a while back:
http://phonoclone.com/diy-guide.html
Since trying battery power on other phono stages with a noticeable improvement in sound quality and lack of hum and noise I am convinced batteries are the way to go, but that's just me. I can crank up the volume on mine and not hear a thing coming from the speakers, even my low noise modded 640P's are noisy compared to this thing. For ten dollars I can power mine for well over a year with batteries so it's even cost effective.
It will be interesting though to hear Big Bills impressions using the Bugle PSU.
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Big Bill
Summertime Rolls.....
I given it a second thought and I've decided to give this MC pre a few weeks on battery power so that I might give it an "equal playing field" review, if you will. I'm "borrowing" the original CNC's box with lantern battery compliment for this evaluation and will return the CNC board to its rightful home after I've completed a custom enclosure for the MC board.
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Big Bill
Summertime Rolls.....
These Panasonic 5% from Mouser. As for the storm, we aren't supposed to be affected this far inland but they've been wrong before.
ara:
These Panasonic 5% from Mouser. As for the storm, we aren't supposed to be affected this far inland but they've been wrong before.
Good to hear that you are safe.
Those Polyesters may be too revealing, if they are try these 667-ECW-F2105JA 1UF's and these 667-ECW-F2104JAQ 0.1uf in parallel as a bypass, that's what I am using now, both revealing and smooth.
Big Bill
Summertime Rolls.....
Thanks Phillip, Jim clued me in on that one so I installed some on the back of the board.:yes:
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Big Bill
Summertime Rolls.....
Amazing!
Well I came home this afternoon, set up the new cart, attached the new pre and then went to fire up the old tube amp only to see my rectifier tube go up in a flash!:tears: I’m having to listen to the new cart and new pre through the Sansui AU-517 I recently acquired and recapped. Please don’t misunderstand, it sounds AMAZING but this is not my reference amp/passive-pre and therefore I’ll have to await the arrival of a new rectifier before I’ll be able to give an accurate review. I’ll say this though, I’m hearing many new and exciting things from my reference vinyl and I honestly doubt I’ll use a step-up transformer in my rig ever again.
Well I came home this afternoon, set up the new cart, attached the new pre and then went to fire up the old tube amp only to see my rectifier tube go up in a flash!:tears: I’m having to listen to the new cart and new pre through the Sansui AU-517 I recently acquired and recapped. Please don’t misunderstand, it sounds AMAZING but this is not my reference amp/passive-pre and therefore I’ll have to await the arrival of a new rectifier before I’ll be able to give an accurate review. I’ll say this though, I’m hearing many new and exciting things from my reference vinyl and I honestly doubt I’ll use a step-up transformer in my rig ever again.