pultec high cut values

Hi


how did the lads from pulse tec work out the frequency to cut at, which resistors did they use  from the circuit to enable them to pick the capacitor value

cheers

skal1

i think the pultec was designed for telephone conversations,

frequencies listed on the front plate are anything but exact,

but you do not want to print  5.427 kc on the panel,

a bell shaped curve is pretty loose anyway, Q is fairly wide compared to RF stuff,

there is no perfect equalizer, each recording is different,

you could pick cap values for a certain recording,

then you could change them a bit for the next recording,

but that is not going to happen, so any equalizer is a compromise,

now you do want to keep reactance the same for each band, so you compute your value of C for each band to give you say, 5,000 ohms at 3 kc, 4kc, 5 kc, etc.