ef37a wrote:Arpangel wrote:Hugh! That's fine, I can make up a lead, but can I be a pain and ask you the value of the resistors I would need?
Phoarrr! How long is a piece of string, or wire in this case! Not knowing the actual output level of the kbd and the input sensitivity of the amp? Pretty d difficult. But...
Ten k Ohms (10,000) in the hot wire and 1k2 (1200 Ohms) from the junction of the hot pin and 10k to earth, jack sleeve will give just under 20dB of attenuation, i.e. a reduction of about 10 times. Making both resistors 10k will halve the signal, -6dB.
Ideally the resistors should be at the destination plug not the source but if the cables are short, under 3m not really a problem.
N very B. If you make the attenuator up as a jack to jack cable LABEL it! Otherwise in a years time you will pull it out the bag and wonder WTF's gone wrong with sommat!
Thanks a lot Dave, Ok, a 10k in-line to the hot pin, and a 1/2k plus a 10k from hot to the screen terminal? I've looked for a circuit diagram for this but can't find one..?