Some international IP labyrinth glitch maybe. I see this attempt I don't see the previous attempt. Anyways, your graph looks spot on as expected now. If the audio card's input load was say 20K like a hi-fi preamp's we would have seen more contour in the VLF. Audio interfaces are usually HiZ in single ended mode. For instruments DI (direct inject).
BTW when cables and loading are the same but the measurement came up better maybe some ground wasn't tight first time around. What audio interface you use? I see you calibrated the levels nicely. Shows real dBV in ARTA. Also what is the rest of the system except Rega RB300 modified Technics SL-1200 series and AT-OC10 old special edition mint state cart?
Thanks for the assist. Wish I could remember everything I have read. Wouldn't have to ask as many questions
Don
I think you where spot on Salas. A ground connection on the audio interface had a bad grounding on the return channel when measuring in dual channel mode. The audio interface is Focusrite 4x4 usb. I am really happy with it. I calibrated it about a year ago and it seems to keep the accuracy.
Regarding TT. It is a SL120mk2 so not modified in any way. I bought it late70's or early 80's just before the CD players arrived together with a SME3009 improved. I need some additional weight to be able to use the 3009 toghter with the OC10, but it is on my todo list. Most of my records is from the 60, 70 and 80's The TT works as a "time machine " for me. It is really nice to put on a record. Memories is flowing to my head
Now with the new phono amp, I need to go through the whole collection again.I must admit that I have to do an AD-DA conversion on the way to the speakers
. The speakers are diy.. LX521-4 from S.Linkwitz and is driven by 4xHypex Fusion amps (total of 10x nCore channels). The UFSP is connected directly to the Fusions.On the digital side of music, I am using Macbook/Roon with some Terrabyte of software and Tidal HIFI.
If I really want to go analog all the way, I can pull out my -80's equipment from the closet
. That includes a pair of Quad ESL63.
Nice active speakers you got there. I thought it was a modded 1200 TT because the picture was close up to the cartridge. The 120 was identical except it came without an arm. The ESL63 electrostatics worth a revisit I guess. To also inspect if they are still going strong or need some maintenance.
Looks sophisticated with three parallel MAT02 monolithic low noise dual BJTs. Film caps are many but the LF411 low offset & drift JFET input op-amp is usually employed as DC servo so most of them must be rail bypasses except for one to block DC offset to the cart from the MAT differential input stage.
For now my Simplistic NJFET RIAA is finished, excellent sound and it stays no. 1
Salas & TeaBag, the magical duo.
Very neat. Congrats!
Hi
I'm in the process of building the UFSP and acquiring my first MC cartridge. I use SME 3009 S2 Improved on Thorens TD160. As the arm is only 9,5 grams with adapter, so a high compliance cartridge is prefferred. Looking towards AT-OC9XSH. Does anybody have experience with this cartridge and UFSP? Or some other recommendations?
UFSP I ordered with 2SK369BL matched Quad.
I'm in the process of building the UFSP and acquiring my first MC cartridge. I use SME 3009 S2 Improved on Thorens TD160. As the arm is only 9,5 grams with adapter, so a high compliance cartridge is prefferred. Looking towards AT-OC9XSH. Does anybody have experience with this cartridge and UFSP? Or some other recommendations?
UFSP I ordered with 2SK369BL matched Quad.
Haven't seen those recent AT carts in use but I see a very good review for the XSH with excellent tracking measurements in HFNRR. Looks like a good match for relatively light arms indeed.
Lab Report
Lab Report