SUT - electrical theory and practical experience

@holmz I have seen how your investigation has evolved and how you are attempting to discover an information that is valuable to your requirements, and hopefully beneficial to your needs, there is no reason to suggest any different is expected, I have many enjoyable experiences spending time with others who have shown a similarity to this type of investigation.

I don't believe I have expressed any negativity (or keeping it Seasonal 'Nativity' towards your endeavour 🎅🤶). I do believe I referred to a experience of having been shown by an EE a Square Wave as a Signal on a Monitor and the shaping of the Signal was of importance, but at the same time, I made you aware I don't get too bogged down with such things.

Adding an extension of context to my comment. I am commissioning a Service and am glad the evidence is on offer for myself to witness, but I am trusting in the Service Selected to deliver the end product and seeing the EE Data is something of a EE's concern and not for me as a customer. From my perspective, with my limited experience, if I was on a DIY route to create a build, or seeking out a discovery, as you are, I am sure I will need to value the data shown in the Oscilloscopes Signal, and work out how to use it to my advantage.

There is no secret that you are being investigative in your route undertaken, and the average on-looker showing an interest will be wondering what will be your discoveries.

Unfortunately there are others as on-lookers associated with the duration of this thread, using your investigation as a means to continue their own agenda and find further ways to reinforce their viewpoint that a SUT is an inferior device to be used in conjunction with LOMC and MM Stage.  

The posts over the last few pages by those trying to derail the idea of selecting the  SUT to be used with a LOMC, are being met with very comprehensible countering and it is certainly a 'standout', that the Info' being touted at the present by the Parties attempting to derail the thread are Conjecture and Idea, not Theory with any element of a Substantiation and certainly not Theorem.

As said previously, nearly all read here has been liked, a small amount has been not so liked, and an even smaller amount certainly not liked.

To discover what is 'Likeable', Not So Likeable, Not Likeable, I do have to read the content. There is one help in deselecting posts that would be a waste of time to be read, and that is to use the Moniker at the head of each entry to see what id worthwhile avoiding. If only the Mod's would give a tool to block members posts getting into their account, how different an individuals personal preference for the structuring of a thread would manifest.

Holmz, Make no mistake, Dave (Intact Audio) knows more about this subject by far than I ever will. So if my advice to check out the Jensen website seems counter to or only partially correct in view of Dave's insight, go with what Dave says. 

What is one to do when the two approaches listed above push you in opposite directions? Menno Van Der Veen acknowledged this and noted that after the proper secondary termination is determined, the load the cartridge sees can be further increased by placing resistance across the primary (ie to the cartridge directly).

@intactaudio I am in disagreement with Mr. Der Veen on this topic. My tests of LOMC cartridges has show that their inductance is so low that they simply do not ring at audio frequencies; they can pass a 10KHz squarewave quite nicely. This suggests that they are not in need of a 'load'. Thus the only load required is really at the output of the transformer, which will (as you point out) will need to be loaded differently depending on the cartridge used.

It is for this reason that Jensen has published a pdf of all the loading networks needed for all the cartridges known on their website. To my knowledge there are no loading values suggested for the primary side of the transformer. 

Of course it should be kept in mind that the tonearm interconnect cable and the interconnect on the secondary side be as low capacitance as possible for best results.

@atmasphere   I would agree 100% with you if the only thing loading of a cartridge does is effect the LC resonance you laid out.  I believe loading of a MC cartridge has a dramatic effect on the electromechanical behavior of the cartridge but that is a topic for another thread.

dave

I believe loading of a MC cartridge has a dramatic effect on the electromechanical behavior of the cartridge but that is a topic for another thread.

@intactaudio Yes! You and I are on the same page here.