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Old 8th June 2010, 12:05 PM   #3851
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Quote:
Originally Posted by RCruz View Post
Fs ?
Frequency resonance, so is the frequency in Hz that cart with arm resounds, when you use a test record you see how the cart moves laterally.
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Old 8th June 2010, 12:06 PM   #3852
RCruz is online now RCruz  Switzerland
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So maybe that will be my next choice.

What load are you using ?
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Old 8th June 2010, 01:25 PM   #3853
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Like Salas load 150R for mine DL103R.

Ricardo tell me your cart & your arm so I will tell you the right FS for your combo.
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Old 8th June 2010, 01:56 PM   #3854
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Well actually I have a RB300 with a DL160.

I am planning to upgrade the TT and the cart but I do not have enough € for the tonearm so I will keep the BR300.
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Old 8th June 2010, 02:58 PM   #3855
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Denon DL160
Type high output moving coil
Output Voltage 1.6mV
Frequency Response 20Hz - 50kHz
Tracking Force 1.6 +/- 0.3g
Mass 4.8g
Channel Separation > 28db
Channel Balance < 1db
Load Impedance 47k ohms
Output Impedance 160 ohms
Styus Tip 0.07 x 0.14mm special elliptical
Cantilever aluminium tapered pipe
Dynamic Compliance 10x10-6cm/Dyne
Notes
*Denon publishes their dynamic compliance specifications relative to 100Hz . The actual compliance at 10Hz will be higher. Mine 5 at 100Hz, real at 10Hz 17.5

Rega RB300
Eff length 237
O/H 15
O/S 21.63
Pivot to spindle 222
Cartridge weight 4-11
Arm mass 11.5
VTA n
MP 23
HS fix
Null Points 60.0 / 114.7

Effective length : distance from stylus tip to pivot point (mm)
O/H (overhang): distance from stylus tip to spindle centre (mm)
O/S (offset): offset angle (degrees)
Pivot to spindle : distance from pivot point to spindle centre (mm) this is normally the same as mounting distance
Cartridge weight : cartridge weight range (g)
Arm mass : arm effective mass (g)
VTA : verticle tracking angle adjustment (yes/no)
MP (mounting): mounting pattern for arm base (mm dia or type)
HS (headshell) fix - fixed headshell
rem - removeable headshell
sme - sme type removeable headshell
arm - removeable arm
Null points : calculated from effective length / overhang / offset (mm)

Tonearm Effective Mass 11.5
Cartridge mass 4.8
Mounting hardware 0.5
FS between 8-9Hz will be optimum
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Old 8th June 2010, 03:06 PM   #3856
RCruz is online now RCruz  Switzerland
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Thank you so much Merlin !!!

Using your data, I tryed to calc optimum FS in here: http://www.vinylengine.com/cartridge...&search=search

I deduced 13Hz (BAD)

But if compliance is higher than 10, maybe it is ok. For 15 compliance I calculated 10Hz.... Yes I also made a calculator for this Resƒ = 1000 /2Pi (Sqrt(Compliance x Total Mass)

I tryed some bluetack in the headshell but I needed to unscrew the counterweight to compensate and it sounded worst.

Last edited by RCruz; 8th June 2010 at 03:24 PM.
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Old 8th June 2010, 03:15 PM   #3857
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Don't forget the alignement Protractor for your Rega:

Click the image to open in full size.

Please be sure to print with the same distances in mm
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Old 8th June 2010, 03:21 PM   #3858
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Denon carts give misleading compliance. I have measured 8.5Hz with the 103R on my Mission 774. Its a low mass arm and would be a no no If I haven't read that the 774 was a favorite combination with the normal 103 in the old days. So I proceeded, got the cart, and the ancients were proven right. Not bouncy at all on the sprung sub chassis of my Walker CJ58 that I salvaged and fixed just before it hit the trash bin at a friend's.
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Old 8th June 2010, 03:41 PM   #3859
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I already knew about FS but I usually call it RF (Resonant Freq) I own a RD80 for more than 30 years now so I am quite at ease with the calculations but know that subjective opinions are very important.

It is strange but the DL160 sings with the very low mass SME3009. With the Rega it sounds light.

I already have the protractor from Manu
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Old 8th June 2010, 05:55 PM   #3860
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Quote:
Originally Posted by RCruz View Post
Thank you so much Merlin !!!

Using your data, I tryed to calc optimum FS in here: Cartridge Resonance Evaluator

I deduced 13Hz (BAD)

But if compliance is higher than 10, maybe it is ok. For 15 compliance I calculated 10Hz.... Yes I also made a calculator for this Resƒ = 1000 /2Pi (Sqrt(Compliance x Total Mass)

I tryed some bluetack in the headshell but I needed to unscrew the counterweight to compensate and it sounded worst.
@Rcruz
The vinylengine calculator is only for compliances 10Hz, so it's bad as I said before: *Denon publishes their dynamic compliance specifications relative to 100Hz . The actual compliance at 10Hz will be higher.

@Salas
Mine DL103R the database compliance said 5 at 100Hz when in the real world at 10Hz is 17.5 so becarefor with Denon compliances aren't rate at 10Hz always are rated at 100Hz.
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