Preamp 47K load. Cartridge needs 330 ohm


Experts!!!

Preamp is Conrad Johnson PV7.  Recently refurbished by Music Technology.

Cartridge is Miyabi Cello Chorale 0.35 mV and needs 330 ohm load.

How do I solve.  Preamp load not adjustable.  Any interface box like Puffin?

Or maybe a Andover SPINSTAGE PHONO PRE-AMP

Or a Lundahl or similar transformer?   I am not sure.

Thank you.

dcaudio

Showing 1 response by dcaudio

Thank you all for input.  Conrad-Johnson phono is 40 dB.  I have checked other preamps for moving coil, they would suggest 60 dB is a good target amplification.  So I need 20 to 24 dB.  The Chorale is rated at .35 MV.  I have feedback that suggests it is lower than that, maybe .25 or .15 mV.  Agree, don't need 330 ohm exactly.  Need to have a step up and be 100 ohm to 500 ohm.  My other pre-amp the Nagra PL-P is 58.7 dB gain and 330 ohm.  I feel that is a lowish and want a bit more output.

So what should I get.  I owned two Ortofon's in the past.  One called MCA-76.  The cleanest would be a transformer like Lundahl or Jensen.  Solder it inside the preamp and no need for interconnects.  I would like to stay under $ 1,000.  Happy with used step-up.