What value load resistor for Denon 103? - World-Designs-Forum

buddam · #1 15th February 2007, 12:19 AM

Doing some tests with a 103 and need to change phono II load resistor. to get me started in right ball-park, I wondered what value 103 users have found best. I've read anywhere between c.10K and 25K (using 1:10 step ups).

Thanks

Adrian

Gerry · #2 15th February 2007, 12:32 AM

Adrian
Try 10K to start. This is what I'm using with my 103R...but is does appear to have a different load to the regular 103 so you may end up going higher.
47K is a little to high.

Regards

Wieslaw Lipowski · #3 15th February 2007, 01:31 AM

As I recall it Denon 103 needs 40-100R of load. I used to own one back in 70's.

W.L.

Richard · #4 15th February 2007, 09:12 AM

The impedance ratio for a 1:10 tx will be 1:100 so if you wish to try loadings of 47R to 100R at the cartridge use 4k7 to 10k at R13/14.

Generally, you may find a brighter tone with higher impedance loading and a duller sound if the load is lower.

prince of darkness · #5 15th February 2007, 09:32 AM

This thread may be of interest to anyone wanting to get the best out of a 103.

http://www.world-designs.co.uk/forum...ighlight=denon

It suggests that the ideal load should be >100R. I have had great results with a load of about 500R. If you try <100R I think you might find yourself agreeing with David Price!

buddam · #6 15th February 2007, 10:24 AM

Thanks all. So it's a range from 4K7 to 50K!

Any favoured brands - Vishay, Roderstein, Kiwame, etc?

Wieslaw Lipowski · #7 15th February 2007, 12:25 PM

Richard:

You have a PM.
Wieslaw

Richard Higgins · #8 15th February 2007, 09:31 PM

Neal G of this BB wrote an excellent 3 page article in the Nov issue of HiFi World, which would be a good place to start.
In it he writes that he eventually settled on a 280 ohm load for a 103 and a 47 ohm load for a 103R, so for a 10:1 step up thats 28k or 4.7k.

Regards Richard Higgins