Running LOMC with MM (47K) loading


This is the way I run my Zyx 4D and my Benz Ebony L before it. I have a JLTi phono preamp which allows me to do this. I have been satisfied with this pre since buying it new. Yet I may be in the market for a new (Different) one. However some I have seen may not offer this ability. One that has great reviews also  has the loading and gain all tied together. Not sure about Herron but it may be out of production. Not sure about others. 
 
The question comes  with @Atma-sphere comments on loading and circuit stability. He contends that the loading  damps (stops) the cartridge cantilever from moving as freely as it was designed (my words) And it is better IF you can run with no loading. But that requires a stable circuit which not all have. Apparently my JLTi has a stable circuit because I have been running LOMC's this way for a 10-15 yrs. 

That said, should I require this attribute to my next phono preamp? And might I be better off to send the JLTi to Joe Rasmussen  (Allen Wright's partner) for upgrade to Pre and new Power supply?. That will be the cheapest and that is likely to be the step I take. However the question still exists. If the damping is as per Ralph's assessment, it would seem that the stability of the  circuit is of greater importance than the ability to have a lot of loading options with unstable circuitry. Another question, Is loading a band aid for a  circuit which is not at an optimum? I am not an electronic tech so I am not  looking to stir the pot but  for my own  understanding  Thanks
128x128artemus_5
I am not a EE minded person.
My Trust was with the Engineer for the design / prototype builds.
As is, with all my other Amplification.

My contribution to the prototypes was to supply a quantity of Boutique Components from Brands the designer did not usually use, as well as supply ears to help with assessments as the design was developed.
This was done more under the guise of further learning, rather than believing a improvement could be achieved through exchanging components.
The designer had Two Identical schematics for 83Input / 83 Output Prototypes.
The Models only differed, as one model was a Single Input, and the other Model has Three Switchable Inputs. 
A Brand of Copper Cap's I chose are exchanged from the designers selected ones in my Phonostage,  these are allowing a Lighter Airier Presentation more aligned to my preference.
A lesson learned one can say.

As for the Phonostage as a development, I heard it with 83's Input Output, 81 Input/ 83 Output and a ECC82 Version .
The Power Supply has been produced in a couple of versions,
the second version is a very noticable improvement over the first edition.
I have the second version Power Supply.
I also know there was a surprise moment about the measurements, and in Layman Terms, the quietness of the Phonostage was extremely impressive.

Recently I have learned there is now another version Three of the Power Supply.
A friend who has been in the company of this Phonostgae on a few occassions has been impressed by this design, which has resulted in them now purchasing one with the Version Three Power Supply.
I am yet to learn whether it will be the same as mine or a 83/83.
This will be determined when the COVID restrictions are altered to allow non family members into anothers home, and the evaluations can start.

The restrictions with COVID over the past year has prevented the HiFi related 'get together' experiences I enjoy.
Hopefully I can get out and meet very soon and hear some of the
Lock Down developments that took place.     
You load the cartridge to what sounds good to you on your system and every system is different it is not a band aid but a load as you like it type of thing but i have found that you load a mc at about ten times its internal impedance for best results on most systems.
You load the cartridge to what sounds good to you on your system and every system is different it is not a band aid but a load as you like it
Its a band-aid in the sense that if the phono preamp doesn't have a problem with RFI injected at its input, you'll find that loading doesn't affect the sound nearly as much. So you'll be able to run with the stock 47K and it won't be too bright.
Well,@atmasphere, you have answered another question I had about whether loading is actually a band aid. Seems to be a natural progression. However I suppose it could also be an option for the customer who needs to tame their systems tendency towards brightness. At least that wa an early finding I had with some different components. Thanks
However I suppose it could also be an option for the customer who needs to tame their systems tendency towards brightness. At least that was an early finding I had with some different components. Thanks
Its not always an option to seek out a phono section that doesn't have this problem! So loading will probably be a thing for the foreseeable future.


For me the big thing is ticks and pops. I don't like them. A phono section that doesn't require loading at the input is also far less likely to generate ticks and pops on its own, caused by a poor high frequency overload margin at the input of the circuit.