Location: Shenfield
Posts: 573
I'm Slav.
cool,thats for clearing that up,just knocking off 10% is maths i can understand lol
My System
John Wood KT88 Amp.
Paradise Phono Stage
Sony TTS-8000 Turntable.
PMAT-1010 MK6 Tonearm.
Ortofon Cadenza Bronze
Sony X555ES Cd Player
Yamaha NS1000m Speakers
Location: Shenfield
Posts: 573
I'm Slav.
10% is correct with your 300ohm and nearby but simple calculator like this:
https://www.allaboutcircuits.com/too...ce-calculator/
should give more accurate value
Back calculating, with a 270R loading resistor, karma67 said he gets an effective value of 243R, so the intrinsic input impedance of the Paradise works out to be 2k43.
If it is 2k8 as quoted, with a loading resistor of 270R, the apparent load, as seen by the cartridge, will be 246R. That is, "about the value of the resistor minus 10%".
The exact value of loading resistors is not really that important (anything greater than 10x the cartridge coil impedance will do, allowing the transmission loss to be less than 1dB). The important thing is that the loading resistors for each channel ought to be with 5% of one another, so the channel balance is within 0.1dB.
Barry
Location: Shenfield
Posts: 573
I'm Slav.
Just to say I can clearly hear a difference between using a 270 loading resistor and a 249 but that may be down to the quality of the resistor
My System
John Wood KT88 Amp.
Paradise Phono Stage
Sony TTS-8000 Turntable.
PMAT-1010 MK6 Tonearm.
Ortofon Cadenza Bronze
Sony X555ES Cd Player
Yamaha NS1000m Speakers
My System
John Wood KT88 Amp.
Paradise Phono Stage
Sony TTS-8000 Turntable.
PMAT-1010 MK6 Tonearm.
Ortofon Cadenza Bronze
Sony X555ES Cd Player
Yamaha NS1000m Speakers
the 270 is a charcroft naked foil,the other is a vishay so yes it could be down to resistor spec rather than loading.
its not perceived either by the way
My System
John Wood KT88 Amp.
Paradise Phono Stage
Sony TTS-8000 Turntable.
PMAT-1010 MK6 Tonearm.
Ortofon Cadenza Bronze
Sony X555ES Cd Player
Yamaha NS1000m Speakers