Cornet2

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mingles

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Cornet2
« on: 23 Apr 2008, 02:37 am »
Can the Cornet2 owners tell me how their unit compares to other phono stages they've heard? I understand you need to purchase the parts separately which means every unit will sound a little different, but if you can give me a general idea how it compares to other stages you've heard, that would be great. If you want to outline the parts you used, that would be helpful too. I own an EAR 834P and I'm looking for something that will outperform it. Natural timbre and low noise are high on my priority list. I also want a deep three dimensional sound stage. Is the Cornet2 capable of this? Thanks in advance! Mark

analog97

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Re: Cornet2
« Reply #1 on: 23 Apr 2008, 12:44 pm »
Mark,

I built the Cornet2 with the Auricap upgrades recommended by the engineer/designer.  When I first looked around the marketplace I also looked at the EAR 834.  Then I compared the guts of the EAR to the Cornet2.  There was no comparison, IMHO.....hands down winner is the Cornet2.  There will be lots of people who love certain capacitors in their C2, so varied opinions here.  My opinion is the C2 will do all you ask and more.  Check it out.  :D :D

taskerc

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Re: Cornet2
« Reply #2 on: 23 Apr 2008, 04:40 pm »
Hi Mingles,

My newly completed Cornet2 has replaced my Project Phonobox Mk11 - it has really improved my vinyl playback in so many ways - bigger, richer soundstage, far more isolation and separation of instruments and sounds, quieter (except for a small pesky HUM I think is a combination of my nude DL-103 and my Cinemag SUT).  I am very impressed with this Phono Stage and glad I did it.  I used the standard components and have Sovtek 5Y3 tube and JJ 12AX7s/12AU7.

It is being fed by a Thorens TD-165 with Dynamat motor plate damping, new bearing thrust plate, RB-250 tonearm and previously mentioned nude Denon DL-103.  Despite my constant urge to tweak and tinker, I think I have found a happy place now :-)

taskerc

mingles

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Re: Cornet2
« Reply #3 on: 23 Apr 2008, 07:27 pm »
Thanks for the comments folks.

Is anyone running the Cornet into a passive preamp? The 1k ohm output impedance is at the upper limit for my Bent TVC.

Jim, any thoughts on this?

hagtech

Re: Cornet2
« Reply #4 on: 24 Apr 2008, 06:54 am »
It works ok with the Bent.  The CCS in the output cathode follower allows it to maintain dynamics under this load.

jh

tubesforever

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Re: Cornet2
« Reply #5 on: 30 Apr 2008, 06:09 am »
I am very pleased with my build and I still have a bit of tube rolling ahead...

Jim Hagerman's design is superb.  His circuit board is first rate.  Very well laid out and so sturdy that I have been able to swap some postions 5 or more times without lifting or damaging a single trace. 

I like the SET design for a phono section.  For some reason or another, SET designs seem to give more spacial information and more clarity of harmonics than other circuit designs.  I consider an SET a perfect circuit for a phono section.

I also appreciate Jim's strict adherance to zero negative feedback.  Adding feedback is adding noise.  I find that his equipment much quieter than other tube gear I have owned.

I like how easy it is to build his kit.  The kit is super affordable and even mine coming in at about 1000 dollars of parts and pieces is a bargain when you realize I compare the sound of mine to a BAT super pack.   :drool:    The big difference?  The Coronet2 is common grounded, the BAT is fully differential or "balanced."

I am using Panasonic TSHA caps of 10kuf 16V for the H+ and Panasonic ED 47uf caps for the B+.  I am using a Mills Wire Wound for the H+ step down resistor (the 5 watt puppy) and Vishay S102 Nudes in the direct signal pathway.  I am using Kiwami 2 watt resistors everywhere else.

The incoming 0.10 UF signal cap is a Russian Teflon FT-3  The RIAA caps are REL.  The B+ bypass caps are 1.0 uf Dynamicaps bypassed with a FT-3.  The final signal cap is a Mundorf Silver Supreme with an FT-3 bypass.

The dynamics, space, and speed of my Coronet2 are in sharp contrast to my previous laid back Precision Fidelity C7 which was highly hot rodded to gain better performance.   I felt the C7 was a very natural and neutral sounding phono section.  Its power supply bit the dust and this gave me an incentive to consider a newer design.

I have also owned the Jolida JD9A and the Audio Research PH-3.  While capable, the Hagerman is several steps more clear and precise.  It has better bass, better slam, and better overall midrange and highs.

It gives absolutely NOTHING up to these other preamps, nor to other expensive boutique gear I used to sell.



I plan to move these caps to both sides of the Coronet2 board so there are smaller wire lengths.  I also plan to have a three way input switch and L/R, R/L AND R/L phase reverse switches.  That way when listening to some of the DG albums recorded with Violins on the right I can flip these with a front mounted switch.

You can email me privately if you want a more specific part by part break down.  I can tell you right now that you can easily build the Coronet2 based on your current desires and budget and improve it as you go. 

This is one serious slice of fun for a DIY nut like myself.  I made a few little mistakes while piecing mine together  :duh   and Jim Hagerman and other contributors here helped me figure stuff out quickly and easily.

My unit sound much better than I ever thought possible given my investment. 

Kudos to Jim for bringing out such a wonderful sounding kit.    Also a heartfelt thanks to all the other contributors that make building a Hagerman a team spirit event.  I hope your experience will be as much fun as my own.   :thumb:

analog97

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Re: Cornet2
« Reply #6 on: 30 Apr 2008, 10:51 pm »
Tubes:

Can you explain the 3 rotary knobs on your Cornet2 build photo?  I built a Cornet2 with Auricaps straight from Jim's book and think it is awesome.   TIA :D

tubesforever

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Re: Cornet2
« Reply #7 on: 1 May 2008, 07:53 am »
On my original C2 build, I had a Hagerman Piccolo mounted in the case.   One switch was for the gain stage setting, the other for the loading options, the third selected between MC and MM and the fourth selected between 4 different phono inputs.

On my next planned reconfigurement, my C2 will have two 3 way 4 pole switches.  One will select from one of three phono inputs, and the other will select L/R  R/L and R/L reversed phase.

I have a bunch of DG albums with the Violins on the right of the stage instead of the left.  This drives me absolutely nuts.  It will be easier to flip this up front than flip the wires on the back.

The reversed phase is only necessary for a few albums.  Since I have the extra position on the switch why not utilize it?

I wish I had put a reverse phase switch on my Clarinet.  This is a phase reversing line stage.  It would be interesting to hear how phase reversing the incoming source might do in terms of absolute phase response in your system. 

Cheers!

Cheers!