Quote:
Originally Posted by bob katz  A very pretty thing you have built!
But why 1.5 dB steps? Why not 1 dB steps? 1.5 is fine for the casual user, but not the professional, in my opinion.
What are the internal impedances? How much does the last step vary when feeding amps of different impedance?
BK |
Thanks!
Right now i have chosen for 1.5db per step because it's a 24 steps switch and i wanted all steps to be equal and so it's from -33 > 0 right now.
I was also thinking of doing something like the first 8 steps in 3 to 6 db steps and the middle section (let's say, step 9 to 18) in 1db per step and the last section (to 0db) in bigger steps again.
In this way the middle section will be more precise the the rest, do you think this is a good idea or should i maybe just use the first steps in bigger steps and from, let's say step 9 to 24 in 1db steps?
Right now the attenuator is set to 10k in total, what do you mean with the last to vary the impendance? The resistance of the output stays at 10k all the time.
I think 10k is ok or do you think i should go for a different value?
The attenuator is a tricky thing i allready found out, the steps are to big or to small and stuff like that, i'm still searching for the perfect steps.
The thing is that a mastering engineer probably needs more precise steps then a mixing engineer who is switching to different levels (really loud to really soft) more and i'll try to make the box work for both mastering and mixing engineers which makes it extra hard i think.
Do you think the box should be balanced or will unbalanced do fine as well? I'm still a fan of balanced but what i understand from your book and comments from other people that unbalanced is better/cleaner.
For the box unbalanced will also be easier and cheaper to build, just a 2pole att switch instead of 4pole (just the 4pole elma was about €90 which is cheap BTW), a lot less relays, a lot less wires etc.