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Over the weekend I built a Auricap Cornet 2, and my cinemags arrived today. I am running a Benz Ace medium at .8mv, which is too weak for the Cornet alone, as I suspected, hence the SUT.
I have them loosely wired-up now in the 150 ohm configuration. Things get pretty loud with my preamp volume pot at 9:00 (7:00 is zero volume) and I'd like to use less phono-stage gain and more of the preamps gain (Belles 21A auricap). I also want to be sure I'm not over-driving the Cornet, if that possible.Is there another way to wire the Cmags to have less overall gain? The carts internal impedance is 24 ohms if that helps, and prefers 250 - 300 ohms loading in an active stage.
Thanks for any suggestions.
Follow Ups:
Ditch the pot on your preamp and replace it with a dale vishay stepped attenuator. These cost 55 dollars plus a little shipping on ebay. You specify the resistance of the ladder.This will give you a clarity in the midrange that you will not hear from a pot. Literally the signal is hitting just two resistors. I cannot imagine a less expensive way to set volume without distroying the integrity of the audio signal.
I would send you mp purely passive preamp, but it is with another inmate at this time.
As for padding down the signal, Al has covered that very nicely.
Let me know how the Cornet sounds to you. If you want I will skip over the hill and bring my Audio Research PH-3 for a direct comparison. This got a Stereophile Class B recommendation. I would love to hear it side to side with a Cornet.
I would also be very interested in hearing your pre and maybe even one of your idlers! WHen could you come down?
The LP-34 idler project will take some time to machine and polish. Probably a month or more for final completion. I have InDaGroove working on a top secret project for me! Damn he is one great guy! So if it takes a little longer it definitely be worth the little extra wait. BTW he is waiting for me and not the other way around.If you want to hear a Pabst thread drive, I can arrange to come down on a Sat or Sun of your choice. I think you are in San Jose is that right?
This would be a great deal of fun!
Email me at jim_howard_pdx@yahoo.com I am not sure if I have your personal email address or not. I will email my phone and skype information.
I'm north of San Jose in San Ramon...hwy 680 runs right thru town. You free this weekend?
I will check to see what he wants to do and when. I owe him and already promised my help.Is MintVinyl close to you? I would love to meet him too! I bet the thread drive gets his attention.
Shoot me an email for sure....I will be home about 6pm tonight and will give you a shout then!
Orange to yellow and attach to the input side's negative (outside of the RCA jack).That gives you the 600 ohm 1:9 ratio tap.
Pad it down farther if needed with a resistor on the secondary (Y-adapter, and a 5k resistor will get you close to a 60 ohm load or so).
--
Al G
Born To Tinker!
nt
Right now the red and green are connected to nothing (the 37.5 ohm taps) ..and that will be left like that?Right now I have yellow/brown connected to input hot lead, and blue/orange connected to input ground. I believe this is correct for 150 ohm. SHouldn't I tie orange and yellow together, but NOT attach them anywhere else? Leaving just brown at input + and blue at input - ?
Ok to let the unused wires to just hang. Do make sure that they are not touching (tape 'em off).
--
Al G
Born To Tinker!
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