Phono Preamp Specs …

Discussion in 'Audio Hardware' started by TheDailyBuzzherd, Sep 9, 2021.

  1. TheDailyBuzzherd

    TheDailyBuzzherd Forum Resident Thread Starter

    Location:
    Northeast USA
    Match a cartridge to these specs:

    Minimum Performance Specifications:

    Sensitivity: 3.5 mV
    Rated Output: 300 mV
    RIAA Deviation, 20 - 25 kHz: +/- 1/8 dB
    [​IMG]
    Bass Turnover: 500 Hz (RIAA), 300 Hz, 0 Hz
    Treble Rolloff: 0 dB (78), -13.7db (RIAA)
    Sub-Sonic Filter: 7 Hz
    THD: 0.015%
    Signal/Noise: 80 dBA minimum
    Input Impedance: 47 kOhms, and 220 pF
    Output Impedance: 600 Ohms
    Overload: 60 mV
    Maximum Output: 5.0 Volts
    Crosstalk: 45 dB at any frequency between 20 - 20 kHz
    Power Requirement: 100-240 VAC, 50/60 Hz, (automatic)
    Dimensions: 6- 3/4" X 3-1/8" X 1-5/8"
    Shipping weight: 2 Lbs



    Perty please? Me no klew. I’m thinking of a ML stylus now.

    :D
     
  2. Davey

    Davey NP: Merope ~ Salos

    Location:
    SF Bay Area, USA
    Must be a REK-O-KUT Ultra. Not really much to match beyond the sensitivity (gain) and input capacitance. In this case, pretty standard, gain is about 38dB, capacitance a little high for the popular AT line of carts, but still useable with very low capacitance cables. The 60mV overload is a good value, means you can even handle some of the higher output cartridges without much worry, so makes it more flexible.

    There aren't really that many MM carts with the ML stylus, so that narrows it down to just a handful, and mostly Audio Technica.
     
    TheDailyBuzzherd likes this.
  3. Ingenieur

    Ingenieur Going with the flow...

    Location:
    PA
    imo one primary criteria is the C of 220 pF
    With cables and tonearm you need a cartridge that likes 300 pF

    What are you feeding it to?
    This McIntosh MC2505
    Input sensitivity is 500 mV
    You may want a cartridge closer to 5 mV

    Ortofon
    5 and 5.5 mV
    Up to 300 pF
    https://www.ortofon.com/media/150415/2m-series-brochure_2019.pdf
     
    Last edited: Sep 9, 2021
    TheDailyBuzzherd likes this.
  4. TheDailyBuzzherd

    TheDailyBuzzherd Forum Resident Thread Starter

    Location:
    Northeast USA

    ‘tis!

    Audio Technica, not too shabby!




    Yes, piping this into the 2505.

    I’ve been looking into Ortofons as well.

    Thanks guys for narrowing down my wants!
     
  5. Davey

    Davey NP: Merope ~ Salos

    Location:
    SF Bay Area, USA
    Ortofon doesn't have anything with the ML (MicroLine/MicroRidge) tip that you wanted, but they have the FineLine on the Bronze and OM 30, and Shibata on the Black, and Fritz Gyger on the OM 40.
     
    TheDailyBuzzherd likes this.
  6. TheDailyBuzzherd

    TheDailyBuzzherd Forum Resident Thread Starter

    Location:
    Northeast USA

    Thanks, Davey!
     
  7. TheDailyBuzzherd

    TheDailyBuzzherd Forum Resident Thread Starter

    Location:
    Northeast USA
    [QUOTE="Ingenieur, post: 27747665, member: 70731"
    With cables and tonearm you need a cartridge that likes 300 pF

    [/QUOTE]


    Tonearm Specs:

    *Type: 14.5 inch (total length), static balance, tubular, S-shaped
    *Effective Length: 12.01 inches
    *Effective Mass: 11 Grams
    *Resonance: 11 Hz
    *Spindle to Pivot Distance: 11.42 inches (290mm)
    *Overhang: 0.59 inches (15 mm)
    *Offset Angle: 19 degrees
    *Tracking Error: +1.42/ -0.97 degrees
    *Bearings: Steel ball bearings
    *Material: Aluminum, Magnesium
    *Dampening: Rubber
    *Finish: Matte Black
    *Horizontal and Vertical Sensitivity: 20 mg
    *Height Adjustment: 1.5 to 2.4 inches (38 - 60 mm)
    *Tracking Force Calibration Range: 0 to 3 gm (for more force, turn weight past "0")
    *Counterweight: 165 gms
    *Anti Skating Range: 0 to 3 gm
    *Mounting Hole: 1-3/16 inches
    *Cartridge Weight Range: 4.0 to 15.0 gms, expandable to 24 gms
    *Headshell: Magnesium with oxygen-free copper Litz wire, adjustable azimuth
    *Standard Cable included
    *Cable Capacitance: 225 pF
    *Cable Harness Length: 48 inches
     
  8. Davey

    Davey NP: Merope ~ Salos

    Location:
    SF Bay Area, USA
    Yea, the standard DIN cable they provide is pretty high capacitance, so you'll be nearing 500pF with the phono preamp, may want to consider high output MC cart, or maybe one of the moving iron types that is less sensitive to load capacitance. Or get a lower capacitance cable. Or just not worry about it. Not really quite sure what your goals are or how much you may want to spend.
     
    TheDailyBuzzherd likes this.
  9. Ingenieur

    Ingenieur Going with the flow...

    Location:
    PA
    so the phono preamp is 220
    And cable is 225
    ~ 450 pF, pretty high
    Is the cable detachable?
    How long does it need to be?
    Blue Jeans LC1 4' is 50 pF
     
    TheDailyBuzzherd likes this.
  10. Ingenieur

    Ingenieur Going with the flow...

    Location:
    PA
    TheDailyBuzzherd likes this.
  11. Mike70

    Mike70 Forum Resident

    JICO SaS is the same as the ML
     
    TheDailyBuzzherd likes this.
  12. TheDailyBuzzherd

    TheDailyBuzzherd Forum Resident Thread Starter

    Location:
    Northeast USA

    WELL one thing I WON’T be doing is spending $1500 on a cartridge
    now that I saw that vid of companies shipping their wares out of spec.

    Classify me as one of those casual+ listeners who is looking to upgrade
    from old used TTs to a nice reliable reproducer of sound. I’m aleady up
    to ≈3k on a TT + accessories and that’s about the limit and then I’m good.

    I think you’re 100% correct on that cable; I’m getting low C cables to
    minimize funk. I prefer funk in the music itself. Also getting a protractor
    ( tho there are freebies online ) and a tracking gauge. Peanuts compared
    to everything else in the steadily growing list.

    :laugh:
     
  13. TheDailyBuzzherd

    TheDailyBuzzherd Forum Resident Thread Starter

    Location:
    Northeast USA
     
  14. TheDailyBuzzherd

    TheDailyBuzzherd Forum Resident Thread Starter

    Location:
    Northeast USA
    … and GOOD LUCK auditioning cartridges around here …
    no such brick and mortar exists any longer.

    UGH
     

Share This Page

molar-endocrine