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Phono preamp choices

wyn palmer said:
Sorry, I thought it was about "phono preamp choices" and not about the Bugle 2 in particular.
If you want, I can show simulation results for the Bugle 2 to provide values for noise, RIAA accuracy etc. - assuming the schematic I have dated 3/24/2014 and labelled Hagerman Audio Labs Bugel 2 is correct, which I believe it is. I can also do that for the EAR design in a while, once I've fully rebuilt my database. I normally keep archives of whatever extant phono stage designs I can find schematics for, but they went the way of all things in my recent workstation crash.
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That would be great! I would like to see that for the bugle2 . It would be very interesting to see how the opa2210 perform in the bugle2 if you are able to do that.
 
desertrat748 said:
Hopefully others will try out Oranda’s mods on the bugle2 and post up their findings. If I had a spare one, I would gladly send it to you for evaluation.
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desertrat748 said:
That would be great! I would like to see that for the bugle2 . It would be very interesting to see how the opa2210 perform in the bugle2 if you are able to do that.
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I'm not sure if the above post is directed to me.
The Bugle 2 S/N ratio simulated in MC mode is actually about 3dB better with the OPA2210s than the LME49720 devices that are specified, but it's still not very good.
I can provide numbers, but first I need to know if you want A weighted or unweighted, 20Hz-20kHz.
 
wyn palmer said:
Sorry, I thought it was about "phono preamp choices" and not about the Bugle 2 in particular.
If you want, I can show simulation results for the Bugle 2 to provide values for noise, RIAA accuracy etc. - assuming the schematic I have dated 3/24/2014 and labelled Hagerman Audio Labs Bugel 2 is correct, which I believe it is. I can also do that for the EAR design in a while, once I've fully rebuilt my database. I normally keep archives of whatever extant phono stage designs I can find schematics for, but they went the way of all things in my recent workstation crash.
Click to expand...

My apologies. I thought I was on the other thread.
 
wyn palmer said:
I'm not sure if the above post is directed to me.
The Bugle 2 S/N ratio simulated in MC mode is actually about 3dB better with the OPA2210s than the LME49720 devices that are specified, but it's still not very good.
I can provide numbers, but first I need to know if you want A weighted or unweighted, 20Hz-20kHz.
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Both if possible. And apologies for the mixup.
 
wyn palmer said:
The EAR design is a pretty basic tube amp. Simple design, with all of the associated issues and benefits of a tube phono stage. Pretty high distortion, high noise, high hum levels, relatively poor RIAA compliance, not "neutral" sounding, poor power supply noise and input mains noise rejection. If you like the non-neutrality and can tolerate the other aspects of the design, or indeed enjoy them (swapping tubes, continually futzing around to tweak the character with this change or that change, sensitivity to line cable, output cables) then it's a great choice.
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I wouldn't characterize tube phono stages in general from one design, even a famous one. My tube phono preamp passes information that I don't hear from any of my SS ones, including the Tim de Paravicini C-1000, although perhaps that shouldn't surprise. ;)

FWIW, thank you for your contributions to the art! :music:
 
I knew that part. Is there a rough pricing estimate for the Acrux? The specs are impressive. And $250 for the Pyx seems a bargain.
 
wyn palmer said:
That really doesn't answer my question, does it. Be specific. This was not about tube gear generally but the specific model. Would you like me to link to Stereophile or other reviews for measurements for example. Better still, why don't you do that work yourself as you might find it more informative.
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Thanks for the info. am familiar with the review.
 
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