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In Reply to: RE: Step Up Transformer Help Needed posted by Heifetz on October 22, 2014 at 04:11:04
Thank you very much for all your comments.
I really likes Bob's Devices Cinemag. I own the previous model 3440 (Bob said that was originally designed more for microphones). Its low gain is1;16. However, Bob has recommended the Sky30 which has a low gain of 1:15 (that is more airy).
But i don't understand how that will help equalise volume in the Zyx without using the high gain.
I prefer the sound on the low gain setting. Abe stated that the loss in volume is 6.4 db with he zyx.
Is there a high quality SUT that can deliver that in a low gain setting ?
Or may be I'm imagining that there is a sound difference between using the high versus low gain ?
I'll post this subject up in the Vinyl section as Abe has suggested.
Thx everyone.
Bob
Follow Ups:
When you change the SUT settings you also change the impedance load on the cartridge. This may be why you prefer one setting over another.
When you change from low gain to high gain you're changing more than just the gain.You are changing the cartridge loading.
The best sounding cartridge loading will be cartridge dependent.
If the cartridge loading when using the high gain setting is correct for the cartridge in use then not only will you have high gain but also good sound.
Conversely, if the cartridge load is incorrect for the cartridge in use when using the low gain setting then even if the gain is correct the sound might be bad.
A SUT with a winding ratio of 1:16 will give you a voltage step up of 16 times.
.5mv becomes 8mv.
.24mv becomes 3.84mv
With 1:32 .5mv becomes 18mv and .24mv becomes 7.68mv
(there's more to it than that but close enough)
If I were you I would use the 1:32 for the ZYX cartridge and see how it sounds and then go from there.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
Edits: 10/22/14
...as Woody Allen said of Marshall McCluhan in Annie Hall, and,
With Cinemag 3440-AH Into a 47k load with 36dB of gain phono stage, the higher gain 37.5 Ohm winding is best. The lower gain setting (I have a switch) I call the Columbia setting because it attenuates higher frequencies a good bit.
Beyond all that, the sensitivity of your amplification and speakers all factor in so, try everything!
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