loading resistor question


I am considering changing the value of my turntable preamp loading resistor. It allows you to choose the value but I have to supply the resistor.

Are there audio grade resistors to use for this purpose? Are there any sound difference one can discern between different make resistors?
jazzgene

Showing 5 responses by jazzgene

After some research, I don't think loading resistor on a phono preamp will be too picky on the make of the resistor.

I am going to try 500 ohms with my cartridge. 1/4 watt. I might just try a few different makes, Vishay and Takman or so and see if there is any discernable difference.

The preamp is a Sutherland PhD.
I like 500 ohm the best so far. 1k ohm is a bit tippy bright. 200 ohm is a bit too dark.

The Sutherland PhD has a loading card which you fill with resistors of your choice. The cards have a limit on the size of the resistors. A standard axial 1/4 w resistor size would fit. Not shure Vishay TX2575's lead will fit the through hole on the card. These look like 1/2 watt resistors.
Thank you for all your responses. So it looks like the loading resistor in a phono preamp indeed does make a difference in the quality of the sound.

I'll investigate some more and get a decent pair of 500 ohm resistors. The Sutherland PhD load card allows you to load it with 4 different values and you can easily go from one value to another by rotating the card.
Just ordered Vishay tx2575 500ohms. Will update when I get them and hear them. Should be better than the RatShack metal films I have installed now. It better be at the price.
Just got my Vishay TX2575 pair. Installed them and they blew away my skepticism. They really do sound much better than the stock Sutherland resistors. I can't believe it but my ears tell me different.

The music has much more delicacy and you hear more nuances and there is a sense of the music floating with instruments more separated. What can I say... I might have to order some more in different ohm values and make a custom load card with these resistors.

Thanks to Doak for the recommendation.