Need help

[2KW]

Hi all,

I need some help in changing some values in a tone control circuit. I've tried contacting the author, but with no luck. I wish to use the circuit in a stereo preamp but cannot get 500k dual lin pots. so wish to substitute 100k pots. What specific value changes do I need to make to allow this.

The circuit can be found here: http://www.dogstar.dantimax.dk/tubestuf/graphics/toneampm.gif


Thanks.

 

[richwalters]

500K dual inline pots........oh yes you can. Try www.Mouser.com
part/stock numbers eg, 313-1250-500k
or my favourite 31VW505.

If you changed to 100K the loading may upset and create more thd.

Hope this helps

richj

 

[Geek]

Hi,

I've tried contacting the author, but with no luck.

Fred is RIP

I wish to use the circuit in a stereo preamp but cannot get 500k dual lin pots. so wish to substitute 100k pots. What specific value changes do I need to make to allow this.

In the tone circuit? You can also try 1M. Then halve the cap values.

Cheers!

 

[2KW]

Fred is RIP ? Sorry to hear that.

I have ordered some from Mouser. Thanks Rich. And thanks Geek.

Paul.