progress?


I know this subject has been visited and revisited. I'd like to approach it from a slightly different perspective. This is regarding the infamous Telarc 1812 overture with the digital cannons. In 1979, I purchased the recording and played it entirely satisfactorily with my Technics SLD2 or Sony PSX7 and Shure cartridges: M95e, V15III, etc. My AudioTechnica 12XE and 12 SA played it as well ,also MicroAcoustics, Acutex, and ADC cartridges without problems. Skip to 1984 or so; with the CD age, you could buy at thrift shops many by then older turntables: Onkyo, Pioneer, Sansui, Kenwood, Technics, Yamaha, etc. Well, those sometimes $10 or less turntables could also play the cannons without problems with the aforemention cart's without bouncing out of the groove. Ortofons or Stantons, even the 681EEE, could not do so unless you brought in a turntable with a servotracer arm [JVC, Denon, Sony, etc.] Keep in mind the total cost at thrift stores would be less than $50, whereas brand new equipment might have run as much as $200. OK; Look at today; I have had turntables from VPI, Project, Music Hall, Rega (3) priced from $1000 to $3000 which look silly when trying to play the 1812 Telarc cannons! This is progress?, I would like some input, and I'm fully aware of phono cartrige compliance assues,and tonearm weight, ec..
boofer

Showing 5 responses by tonywinsc

I bought this record in 1980/81. I think it was close to $20 back then. I bought it because I thought digital records were the best. I don't think that today, although the Telarc records were exceptionally quiet back then, more so than most labels. I also bought it simply for the challenge because of all of the warning labels on the jacket. Telarc was daring me to buy it and play it. I was young and bold back then. I actually enjoyed the piece and played it often back then for people. I also remember smirking a few times in the 80s when someone's high end tt would jump the tracks during the canon fire- usually it was a salesman at a stereo shop. I have never had an issue playing it with my gear. I used MM or High Output MC cartridges up through 2002 when I traded my old faithful ARC SP-6b for my current preamp that can play low output MC cartridges. Never a problem with MC cartridges. I think it is all about set-up, cartridge/tonearm matching and proper isolation. This is a low frequency tracking problem. If your analog rig can't track canon fire, then how do you know the bass is all it can be otherwise?
Not surprising that the cartridge could track low freq better with a system natural at 5Hz; because that is further away from the 20Hz+ musical frequencies. It could be ideal if not for the other parameters that must be addressed, ie. warps in records, runout, external vibrations such as foot falls and rumble. The author of that article looked only at one parameter. I also think that stylus design/shape is a factor too for both low and high frequency tracking. Some stylus shapes definately work better than others.
"I own several very high compliance cartridges that I mounted in heavy mass tonearms and performs very well."

Hi Raul, I believe that is possible if your turntable is very well isolated, has low rumble and has a way to keep the record perfectly flat. The danger is if the record has any warp then it is possible to drive the cantilever suspension to its hard stops. At that point, there could be risk of damage to the cartridge and/or record groove. The high compliance cartridge sees the high mass tonearm as an immovable object. So even a record with high runnout, ie. eccentric hole might stress the high compliance suspension in the lateral direction. The grooves are moving back and forth but the tonearm stays steady and the high compliance suspension must absorb all of the motion.
To summarize; that magic number for the correct compliance/effective mass yields a system (tone arm and cartridge) natural frequency around 10 Hz.
Actually, the accelerations at the stylus would need to be the same in order to generate the same frequencies and amplitudes. So the grooves would just be elongated and not quite as pronounced on a 45rpm version. Also, you would have to flip the record halfway through the song; but then side 2 of the Telarc disc is not nearly as exciting anyway.