"Jim Lesurf" wrote

big snip

Yes, and has little or nothing to do with either of the other two
resonances I am talking about. :-) You are correct. Low compliance MC
designs can give more problems with vibrations into the arm. But that is
another story to the two resonances we have been discussing.


OK, seems I'm barking up the wrong tree here - thanks for taking the trouble
to explain!

(Phil's right, I didn't exactly read that article to death - only quickly
scanned it, as I usually do these days! :-)

Anyway, rightly or wrongly (and never having had a *low mass* tonearm to
worry about), I have always been under the impression that the (medium-high
mass) tonearm will usually take care of unwanted 'resonances' and that the
headshell (with or without a blob of Blu Tack and a handful of pound coins)
will take care of any (HF?) misbehaviour from within the cartridge itself??

Esoteric extremes aside, the reality is that most current carts seem to run
just fine on most current tonearms - according to recent posts, you have a
V15 on a (presumably) Technic S-shaped tonearm, Don runs an AT09 on an
SME3009 and I have a V15/III on a simple Lenco (tube and cube) tonearm as
well as an AT05 (I believe it is) on another Technics tonearm - all running
quite happily, I surmise?


Yes, I do have the impression that some MC designers may well have
'stopped
worrying about it'. :-) Alas, that may then cause their designs to have
resonances at HF which they haven't 'worried about' - or maybe noticed.


Maybe they are operating (as I do) under the banner 'if you can't really
hear it, it don't really matter'...??



As Phil has said, these can occur in the 10's of kHz region. A problem
with
MC designs is that the coils may contribute quite a large effective
intertia so far as the HF resonance is concerned.


'10's of kHz' definitely qualify as above - is there any 'side effect' that
I should know about?


But I am less confident about some modern carts which we are told were
designed 'by ear'. The best the user can do is hope to mitigate this by
playing with electronic loading. Or by using a differerent cartridge.


See above also, I'm fairly sure (another pun) that manufacturers
deliberately follow a 'one size fits most' path these days....



Maybe I should move up my 'to do list' writing about this.It seems to be
another aspect of LP engineering that has largely been forgotten since the
main engineering was done some decades ago.


Would it be worth your time an effort, given the ever-shrinking 'vinyl
user-base'..??