Headshell recommendations for AT33SA on SL1200G


Hello

I am planning to upgrade my cart to an AT33SA on my SL1200G, but I'm a little confused about whether this would require me to also change the headshell (low compliance cart, resonance frequency etc.).

Can I keep the standard headshell, or should I upgrade to something heavier? Can I go as heavy as an Audio-Technica LH/OCC AT-LH for example?

Many thanks!
diceman72

Showing 5 responses by chakster

@diceman72

You can read this artricle and calculate, anything within this range is fine.
But you have to know toneam effective mass before you will make any calculation, if it’s not given by the manufacturer your calculation can be wrong unless someone who own Hi-Fi Test LP can measure the actual resonance frequency. I have Technics turntables and i’m using Hi-Fi Test LP (highly recommended) to measure vertical/lateral resonance.

Using a test record you don’t have to know anything about cartridge compliance or tonearm effective mass. You will measure it with the record and you will see the result by your own eyes.  

How can you do that online if you’re not sure about tonearm effective mass ?

Or not sure about cartridge compliance, because you convert it from 100Hz to 10Hz first and it is not 100% accurate.

Technics headshell is fine, but you need Hi-Fi Test LP to measure (and you will see it) the resonance of your particular cartridge on your particular tonearm.

All online calculation is theory and can be wrong practically, if you want to make sure you have to measure your own cartridge/tonearm resonant frequency using HI-Fi TEST LP with recorded signal on it, you will see when your cartridge and tonearm will start shaking at certain frequency and the voice on the record counting resonance frequency. This is what you need.

This is what you get with Hi-Fi Test LP:

"Tracks 2 & 3: Cartridge & Arm, Lateral & Vertical Resonance Test
These two tracks are used to test the resonant frequency or your tonearm and cartridge combination in both the vertical and horizontal domains. These tracks offer both a visual and auditory indication of the resonant frequency; the stylus will “wobble” and the test tone will warble. A resonant frequency between 8 - 15Hz is ideal."

For different cartridges on your Technics tonearm you need different headshells, you can get lighter one and heavier one for use with different cartridges (if the compliance is different), then you are fine in any situation. But you have to check it (always) with Hi-Fi Test LP, not with online calculators.


Look for Ortofon LH-9000 Resonance Free headshell, i hope you can find used one for reasonable price, new one is expensive. It's heavier than stock Technics and it has azimuth adjustment. 
**Some if my favorite vintage headshells:

Grace HS-8 -metal 
Grace HS-6 -carbon fiber (another image)
AudioCraft  -this one is heavy for LOMC (another image)
another AudioCraft (also available in silver) 
Kenwood - basic, but very nice 
Stax -with overhang and azimuth adjustment 
Entre DAS-1 (also available in black) just basic headshell 
Fidelity-Research -nice one  

**And one more NEW (very expensive):

ZYX Live-18 (also available in silver). 



Dynamic compliance of the AT33SA is 10×10-6cm/dyne (100Hz)
It will be around 17cu @ 10Hz and this is a starting point for calculation.

AT33Sa weight is 6.9g

I think 12g headshell could be more optimal than stock Technics headshell which is also nice.

Anyway it's important to have different headshell in the arsenal, Technics is super lightweight and better for high-ish compliance, Ortofon LH-9000 is heavy one for low compliance. 

Maybe one more in the middle and you're done for mid compliance (for any cartridge). 







The AT33 carts are very short and you will need a headshell spacer.


In this situation thicker mat can be used instead of cartridge/headshell spacer, something like SAEC SS-300 or Micro CU-500  (best mats ever made in my opinion).