Hi, I am taking a first small step into the world of SUT´s. What would you think to be a good SUT for the Kiseki PurpleHeart pickup? What about the Lyra Erodion or the Consolidated Audio? Any SUT that would also be good with for example a SPU? The plan would be to use it with the Kondo GE-1 and Kondo Overture with Avantgarde UNO XD´s. Thanks for any advice
I am not quite sure what gain is best for the Purpleheart. I have used it at 64 db with the Burmester 100, and that seemed fine though. The Kondo GE-1 has 34db.
Gain is more about the rest of the chain / speakers, but the more gain you acheive with a stepup the lower the numerical loading so this ends up affecting everything
For example if you use 1:10 SUT you will have get 54db total phono gain and 470 ohms load for the cart. Whether thats enough gain for the system depends on preamp gain /amp sensitivity...
For example if you use 1:10 SUT you will have get 54db total phono gain and 470 ohms load for the cart. Whether thats enough gain for the system depends on preamp gain /amp sensitivity...
I understand, the Consolidated Audio SUT comes in three variants; 1:10, 1:15 and 1:20. That should be 20, 23,5 and 26db. It seems the Erosion gives 26db. The Kondo Sfz (another possibility) gives 20 or 36db.
I am not sure of the gain/amp sensitivity of the Kondo Overture amp though.
Kiseki Purple Heart has 40 Ohm internal impedance, so an optimal SUT primary should be close to that value.
That would roughly correspond to 1:10 step-up ratio
That’s what I’m using with Kiseki Purple Heart, Ypsilon MC-10 L SUT
SUT primary impedance match with the cart internal impedance is the first step in selecting appropriate SUT.
The corresponding gain is the function of that value.
Kiseki Purple Heart has 40 Ohm internal impedance, so an optimal SUT primary should be close to that value.
That would roughly correspond to 1:10 step-up ratio
That’s what I’m using with Kiseki Purple Heart, Ypsilon MC-10 L SUT
Your math is off. Internal cart impedance doesn't dictate winding ratio. The SUT winding DCR should be matched to the cart internal impedance. The Ypsilon L is a low DCR SUT and not a good match for the Kiseki. You'd get better results with the H version. Curiously, the max load recommended for the Purpleheart is fairly light at 400 ohms. So the SUT ratio will want to be around 1:10 at most. The best starting point therefore is probably a 1:10 high DCR SUT. As close to 42 ohms as possible.
My recommendation is contact Dave Slagle at Intact Audio and have him wind a 1:10 40 ohm SUT for you. If there is a lack of gain with your phono, he can swap it for no charge later. But any increase in windings ratio is going to present a heavier load to the Kiseki than recommended, and will likely have other consequences.
Your math is off. Internal cart impedance doesn't dictate winding ratio. The SUT winding DCR should be matched to the cart internal impedance. The Ypsilon L is a low DCR SUT and not a good match for the Kiseki. You'd get better results with the H version. Curiously, the max load recommended for the Purpleheart is fairly light at 400 ohms. So the SUT ratio will want to be around 1:10 at most. The best starting point therefore is probably a 1:10 high DCR SUT. As close to 42 ohms as possible.
My recommendation is contact Dave Slagle at Intact Audio and have him wind a 1:10 40 ohm SUT for you. If there is a lack of gain with your phono, he can swap it for no charge later. But any increase in windings ratio is going to present a heavier load to the Kiseki than recommended, and will likely have other consequences.
The 1:10 version makes sense as you'll present a 470 ohm load, but I thought the Ypsilon L vs H designation referred to DC resistance of the primaries (as is convention with most SUTs). I'd seen this described for Ypsilon somewhere in the past, but can't find it now. L is normally 6-8 ohms or less, with H being in the 30s upward towards 40 ohms.
The 1:10 version makes sense as you'll present a 470 ohm load, but I thought the Ypsilon L vs H designation referred to DC resistance of the primaries (as is convention with most SUTs). I'd seen this described for Ypsilon somewhere in the past, but can't find it now. L is normally 6-8 ohms or less, with H being in the 30s upward towards 40 ohms.
Ok I wasn't suggesting it referred to step up ratio, but to the DC resistance. If it doesn't (and I can't find the info I thought I'd read) then the Ypsilon SUTs must be only wound with a single DCR. Typically it's a low DCR, which might make this SUT a less than ideal match for this cart. Anyhow, sorry for the confusion as it looks like I have my own windings crossed .
Ok I wasn't suggesting it referred to step up ratio, but to the DC resistance. If it doesn't (and I can't find the info I thought I'd read) then the Ypsilon SUTs must be only wound with a single DCR. Typically it's a low DCR, which might make this SUT a less than ideal match for this cart. Anyhow, sorry for the confusion as it looks like I have my own windings crossed .
Ypsilon doesn't specify the primary winding resistance of the MC-10, just states an approximate estimate of the loading "seen" by the cartridge, which is 500 Ohm (as you stated, Kiseki recommends 400 Ohm loading), which would roughly correspond to 40-50 Ohm of primary resistance.
In so many words, yes.
He actually said, that 47 KOhm phono input wil show 480 Ohm at the primary of the MC-10L, which is a good match for Kiseki, that recommends 400 Ohm.
And yes, the correlation with primary resistance is rough.
I really had a choice to order any of the Ypsilon SUTs and just went with what the designer recommended.
The 1:10 version makes sense as you'll present a 470 ohm load, but I thought the Ypsilon L vs H designation referred to DC resistance of the primaries (as is convention with most SUTs). I'd seen this described for Ypsilon somewhere in the past, but can't find it now. L is normally 6-8 ohms or less, with H being in the 30s upward towards 40 ohms.