I was looking at the Jensen MC transformers last night. It surprised me to see that their test circuit loaded the secondary with a C as well as an R. That's the first time I've seen that for an MC cart.ricardo wrote: The one item we haven't added in this investigation is the effect of the optimum load capacitance.
I ended up nowhere near the recommended load for the DL103 with the Lundahls. Off by a factor of 10x. The transformer is 1:16. R2 and R3 of the preamp are 1MΩ. This measured 100kΩ differentially. My load resistor is 221kΩ. That's 221kΩ in parallel with 100kΩ if I have that right. I come up with 68.85kΩ. Right?
Any lower value sounded darker and higher values didn't make much of a difference. It still sounds darker than the source. it sounds like there is not much above 12k or so. The sheet that comes with the DL103 shows it ruler flat to 20k. The roll off miraculously is like a tape hiss reducer so I think it might have been designed in on the sly. Or it could just be the limitations of the conical stylus. This is for QC and I like the way the DL103 breaks up. It doesn't sugar coat things.