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Old 24th October 2006, 11:01 AM   #1
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Default The perfect phono preamp.

With Frank back among us is only fair that I give him a project to think about.

Franks line stage project a while back was not only good reading but good learning for most of us.

Some of us have been searching thru countless schematics trying to come up with a good working quiet phono preamp.


Frank? anyone?
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Old 24th October 2006, 11:35 AM   #2
SY is offline SY  United States
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I seem to be talking to you a lot this morning.

I'm almost finished my new one and will publish as soon as I have a better build completed for photos. VERY quiet. I'd love to see what Frank might come up with.
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Old 24th October 2006, 11:59 AM   #3
wa4htz is offline wa4htz  United States
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Joe,

I think Frank did show a schematic for a MM phono stage many months ago, although I'm not sure if he started the thread or not. I do distinctly remember he showed a schematic for a MC pre-pre amp using 4 6922 sections paralled and running at 24 volts B+. (Stuck in my mind because I remember thinking "Man, that's gonna be a lot of tubes for a phono stage.") Sorry, I don't have time to search right now but seems like it was about the time he showed the 12BH7 line stage schematic. However, I would be really interested in anything new he comes up with. And I am definitely interested to see Stuart's new design (been hoping he'd show it to us).

Ken
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Old 24th October 2006, 06:02 PM   #4
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i'm also interested. let's see this amazing phono preamp.
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Old 24th October 2006, 07:03 PM   #5
SY is offline SY  United States
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Soon, soon. To no-one's surprise, there's LEDs in it. I just love red glowy things.
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Old 24th October 2006, 07:15 PM   #6
anatech is offline anatech  Canada
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Hi SY,
I'm interested (as you may have guessed).
Quote:
I just love red glowy things.
Unless they are resistors, or plates.

-Chris
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Old 24th October 2006, 11:43 PM   #7
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wa4htz

Ken,

Thanks for the info. I will start looking for the 6922 schematic.
I'm chomping at the bit waiting to see SY's phono preamp also. Hopefully Frank will treat us to something special in the way of a super MM/MC preamp.

Maybe SY will bring out the phono stage in time for Christmas. I could build it and also use it in place of a christmas tree. I'd just hang an ornament next to it and call it good.
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Old 24th October 2006, 11:44 PM   #8
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Quote:
Unless they are resistors, or plates.
Hey! Wait! I thought resistors just smoked and caught on fire.
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Old 25th October 2006, 12:02 AM   #9
arnoldc is offline arnoldc  Philippines
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Hey Sy, any clue as to what tubes will complement your phonostage? Might as well look up my inventory now and see if I have any.

Will it be 12Au7s?
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Old 25th October 2006, 12:06 AM   #10
SY is offline SY  United States
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Tubes are top secret until I've secured my own supply. I'm guessing I'll have this project out sometime in the next 2-3 weeks. Then it's time to get my tt drive system put together (not my design).
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