You could do worse than ask Steve Leung whether his VAS transformer would suit your cartridges. I have the MkI version (there is now a MkII) and I have four low output cartridges feeding it through a switch (LP-S, Ruby 3 mono conversion, Ortofon Kontrapunkt C and a Soundsmith Sussurro MkII ES - the last is a low output MI cartridge). I'm very happy with it, even if I don't begin to understand how to calculate whether it is the "right" SUT for any of them.
Step Up Transformer Question
Ok, so bear with me as this is new terrain for me. I was quite happy with how things were sounding and then I accidentally bumped the stylus of my Cadenza Black and snapped the cantilever clean off. I did some research and ultimately decided to have Steve at VAS at fix my cartridge but it was going to take a few weeks and there was going to be no way to play the Christmas vinyl that my wife loves so much. She told me to buy another cartridge so we could have Christmas records. I was stunned. I found a great deal on a Winfeld Ti on this site and pulled the trigger. I've got it on my table and it sounds amazing.
After speaking with Steve though, I'm going to trade in my Cadenza and have him build me a wood body cartridge to have something different. It will also be 0.2mv output. I think I've got the 2nd arm situation sorted (gonna buy a Wand and a pod to mount it on) which leaves the phono pre. I love my Rogers PA-2 and it is switchable between MC and MM with 2 different inputs in the back. Finally got the SUT part. I've been looking and trying to figure things out. I spoke with Roger and he said the transformer built into the PA-2 is 1:10 and with that I can achieve 70 or so dB of gain. I did a lot of reading and looking and while I'm sure a 4k+ SUT is amazing that's just not where I'm at with all the other expenses at the moment. I saw the Bellari MT502 was a stereophole recommended component for many years and Amazon had one on sale for like $349 or something. Figured can't hurt to try it, it's Amazon so I can always return it. I plugged it in with some admittedly questionable interconnects I had lying around and when I put the phono stage k there was a bit more hum than I'm used to but I said let's have a listen. Holy shit. This little thing blew my mind. Better impact, tighter bass, more space around instruments so better staging, improved transients. This puts me in an interesting place.
This is an extremely inexpensive piece and it has changed my system quite a bit. I think the little extra gain I get even at 1:12 brings the cartridge to life. My question is where do I go from here? Bob's makes the sky 30 which is switchable from 1:15 to 1:30 which I like because I can play with the gain tubes in my preamp and potentially go to a quieter 12au7 than the 12ax7 that's currently in there. Will that be a real improvement? Less hum? Had also considered ordering a Rothwell from jolly old England but can't find much on them. Thoughts? I'd like to keep this sub 1k or so for now. Maybe I'll save up for a big boy SUT later.
Showing 4 responses by dogberry
@rmdmoore I use a SoluPeak 4-way switch from Amazon. I can’t tell the difference with it in circuit, or connecting the tonearm directly. If you want to just run two carts, there is a Rek-o-Kut switch that also seems very quiet. I have a couple of them from previous iterations of tonearm numbers, which seem to grow and grow! I’d recommend the 4-way, though, as it lets you add two more! The cartridges have internal impedances of 38, 38, 10 and 5Ω. I don’t know what the turns ratio of the VAS transformer is, and you’re correct, Steve doesn’t push it. Basically, he said your ears will tell you if it’s right. If you can get him to reveal the turns ratio, please let us know. |
@elliottbnewcombjr I use WBT locking connectors, but they still need a wiggle or a jiggle every now and then to decrease resistance caused by accumulated crud. (I guess they might be gold plated but it is impure gold!) |