Hagerman cartridge loading calculator

0 Members and 1 Guest are viewing this topic. Read 3339 times.

cyto

  • Jr. Member
  • Posts: 36
Hagerman cartridge loading calculator
« on: 4 Oct 2013, 11:48 pm »
Just asking for opinions:

Using 40pf for my Cornet 2 and 35pf measured for my tonearm and cable (1/2M Emotiva X series at 56pf/M + tonearm) I got a total of 75pf. My cart is an AT120e/t wich likes 100-200pf and has 490mh inductance. I pluged in the numbers and got a resonance frequency of 26.3kH, ok so far.

The "optimal" resistance load, according to the calculator is 80.8K. I built the Cornet with 47K.

Should I try 80K and see what it sounds like? It is not overly bright as I suspect changing the load to 80k would make it brighter.

BTW I am still diggin' the 6n2P-EV in the V200 spot.

Thanks

David

hagtech

Re: Hagerman cartridge loading calculator
« Reply #1 on: 5 Oct 2013, 10:15 pm »
How do you know that cart likes 100pF to 200pF? 

jh

cyto

  • Jr. Member
  • Posts: 36
Re: Hagerman cartridge loading calculator
« Reply #2 on: 6 Oct 2013, 06:13 pm »
How do you know that cart likes 100pF to 200pF? 

jh

It is in the owners manual.

WireNut

Re: Hagerman cartridge loading calculator
« Reply #3 on: 6 Oct 2013, 06:29 pm »
Cyto,

Thank you for that, I have the 120E, I over looked the 47k spec  :duh:

 

hagtech

Re: Hagerman cartridge loading calculator
« Reply #4 on: 9 Oct 2013, 04:46 am »
Forget the spec.  Trust your ears.  Build it with minimal capacitive loading.

jh

cyto

  • Jr. Member
  • Posts: 36
Re: Hagerman cartridge loading calculator
« Reply #5 on: 9 Oct 2013, 11:08 am »
Forget the spec.  Trust your ears.  Build it with minimal capacitive loading.

jh
I agree

I usually mod my phono stages to have adjustable input impedance. I think I will do the same to my Cornet 2 with (47k, 82.5k, 120k, 150k) resistors and a DIP switch on a small perf board, one for each channel. With the parallel combinations I will have a wide choice of impedance settings.