PHONO STAGE, HEAD AMP & SUT'S - dv187736's PF C7 Preamp

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Re: PHONO STAGE, HEAD AMP & SUT'S - P2P AIKIDO Phono Stage

Postby camotecue » Sun Jul 25, 2010 11:19 am

beautiful! :bow:
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Re: PHONO STAGE, HEAD AMP & SUT'S - P2P AIKIDO Phono Stage

Postby Squirrelnutzipper » Sun Jul 25, 2010 12:21 pm

audiostar wrote::inlove: :inlove: :inlove: :inlove:

Hey Val, try them all out, the D3A, Aikido and that latest really cool one with al the flexibility built in. Good way to kill a weekend!

Oh baby yeah. That's the beauty of analog Dana so many possibilities in achieving the right sound :) But I always go by the principle that its not really all about the equipment you use, but on how you use them ;)


Could not agree more with these observations about analogue and audio in general. The phono amp with properly executed RIAA is a critical link in the chain. The design, choice of quality components and great layout in implementation makes all the difference between low level components and the truly excellent. Besides, the cost is not that much in comparison to expensive name brands, where you are paying for marketing and overhead. All these units here are great, and not all of them are mine, unfortunately Resources are finite, but I think wisely spent in this case. You do ge what you pay for in most cases.
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Re: PHONO STAGE, HEAD AMP & SUT'S - P2P AIKIDO Phono Stage

Postby audiostar » Sun Jul 25, 2010 3:49 pm

Right on Dana :)
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Re: PHONO STAGE, HEAD AMP & SUT'S - P2P AIKIDO Phono Stage

Postby hypertriode » Sun Jul 25, 2010 5:49 pm

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Re: PHONO STAGE, HEAD AMP & SUT'S - P2P AIKIDO Phono Stage

Postby mandym » Sun Jul 25, 2010 7:04 pm

I think Mr. Rivo is guilty overkill. Overkill of beauty, that is.

Dana, I don't see how with a great circuit, premium parts (Vitamin Q even!) and great workmanship, this preamp will place second to the best preamps around.

All is perfectly done except (picky, picky me), the two PS electrolytics simply protruding out of the chassis through roughly cut holes. I think this is just a premature picture and that Rene will soon be embellishing them with collars.

Congratulations to the maker and the owner!
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Re: PHONO STAGE, HEAD AMP & SUT'S - P2P AIKIDO Phono Stage

Postby endrik35 » Sun Jul 25, 2010 7:55 pm

GRAAABEEHHHH! :clap! your phono preamp is oozing with sex appeal! Beautiful! Sabe nga ni Dr. Haydn Kho, my idol, OOH LA LA! :rofl: Pa Pm naman sir Rene kung magkano inabot yan! Thanks!
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Re: PHONO STAGE, HEAD AMP & SUT'S - P2P AIKIDO Phono Stage

Postby Squirrelnutzipper » Sun Jul 25, 2010 8:54 pm

mandym wrote:I think Mr. Rivo is guilty overkill. Overkill of beauty, that is.

Dana, I don't see how with a great circuit, premium parts (Vitamin Q even!) and great workmanship, this preamp will place second to the best preamps around.

All is perfectly done except (picky, picky me), the two PS electrolytics simply protruding out of the chassis through roughly cut holes. I think this is just a premature picture and that Rene will soon be embellishing them with collars.

Congratulations to the maker and the owner!

Mnady,

I agree that all of these units exude quality and attention to detail, and should sound superb. The protruding Mundorfs in two of these units are as they are I think, unless mink collars would add something? Vitamin Qs? All I see are Solen Teflon, TFTs, the green ones and Mundorf. What do you see?
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Re: PHONO STAGE, HEAD AMP & SUT'S - P2P AIKIDO Phono Stage

Postby alexg » Sun Jul 25, 2010 9:16 pm

hypertriode wrote:
audiostar wrote::inlove: :inlove: :inlove: :inlove:


MM/MUTE/MC front panel switching

MC 1/MC 2 rear panel switching

4722/15095 switching

38 & 150 ohm load impedance switching on 4722

150 & 600 ohm load impedance switching on 15095

30k, 47k, 68k & 100k switchable loading for MM

more pics:


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When I grow up I want to be able to solder like my IDOL, Rene!
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Re: PHONO STAGE, HEAD AMP & SUT'S - P2P AIKIDO Phono Stage

Postby mandym » Sun Jul 25, 2010 10:01 pm

@Dana, the two capacitors connected (?) to 220K resistors each and immediately next to polystyrene caps look like Vitamin Qs or of the same type anyway.

hypertriode wrote:Image
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Re: PHONO STAGE, HEAD AMP & SUT'S - P2P AIKIDO Phono Stage

Postby Squirrelnutzipper » Sun Jul 25, 2010 11:24 pm

Yup, Vitamin Qs alright. Sharp eyes on the old guy!
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Re: PHONO STAGE, HEAD AMP & SUT'S - P2P AIKIDO Phono Stage

Postby hypertriode » Sun Jul 25, 2010 11:51 pm

Squirrelnutzipper wrote:Yup, Vitamin Qs alright. Sharp eyes on the old guy!


Actually these are better than Vitamin Q's, they're Westcaps! Clearer and more dynamic than, but with that oilcap-bloom of the Spragues! ;)

Thanks for the nice words guys!

Senor Mandy, yes it would look nicer with collars but mind you, it doesnt actually look as bad as it looks in the pics :)
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Re: PHONO STAGE, HEAD AMP & SUT'S - P2P AIKIDO Phono Stage

Postby manila » Sat Mar 19, 2011 8:42 pm

Very nice work Mr Rivo! She's a beauty!
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Re: PHONO STAGE, HEAD AMP & SUT'S - mandym's Aikido phono stage

Postby hypertriode » Wed Apr 20, 2011 8:05 pm

mandy's Aikido Phono Stage With Janus Tube-rectified & Tube-regulated Outboard Power Supply.

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Re: PHONO STAGE, HEAD AMP & SUT'S - mandym's Aikido phono stage

Postby mandym » Thu Apr 21, 2011 2:00 pm

Hey, that looks great Rene! I can't wait to hear its electrons making music!
One thing though, that VOLUME KNOB does not turn me on :( . Pwede ba paki replace?
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Re: PHONO STAGE, HEAD AMP & SUT'S - mandym's Aikido phono stage

Postby audiostar » Fri Apr 22, 2011 11:32 am

Great! Sana this beauty is tweaked soon enough for my family's plan to spend a night in San Pablo this May. I excited to hear it sing :)
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Re: PHONO STAGE, HEAD AMP & SUT'S - mandym's Aikido phono stage

Postby JoeyGS » Fri Apr 22, 2011 12:05 pm

Wow, great build Rene. This is one dynamic phono preamp :devil: .......one of my wishlist :) :cla :devil: p:

Advance congrats to Mang Mandy
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Re: PHONO STAGE, HEAD AMP & SUT'S - mandym's Aikido phono stage

Postby alexg » Fri Apr 22, 2011 12:57 pm

Rene,

Excellent work. What are the tubes? P2P?
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Re: PHONO STAGE, HEAD AMP & SUT'S - mandym's Aikido phono stage

Postby hypertriode » Wed Apr 27, 2011 7:30 pm

alexg wrote:Rene,

Excellent work. What are the tubes? P2P?


Thanks Alex! :)

Tube set-up is 12AX7-12AT7-12AX7-12AT7. The main phono stage is PCB'ed; Janus tube regulated supply is P2P.

More pics:

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Re: PHONO STAGE, HEAD AMP & SUT'S - dv187736's PF C7 Preamp

Postby hypertriode » Fri Jul 22, 2011 7:07 pm

dv187736's Precision Fidelity C7 Phono Preamplifier With Passive Line Stage.

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