regularjohn
Well-known member
Ok...I'm trying to figure out every option possible for a GSSL meter...and math was never my best subject. So I might need some help here.
According to Jakob, with a 2K meter resistor, 50uA is equal to 1dB GR on a 20dB scale for a 1mA meter. For 10dB scale on a 1mA meter it's 100uA per dB with a 1K resistor.
But, if I wanted to use a 2mA meter, with a 20dB scale, it's 100uA per dB for a 20dB scale with a 1K resistor, right? But a 10dB scale on a 2mA meter would require 200uA per dB, so you'd need a 500 ohm resistor...is that correct?
And mathematically, you could use a 20mA meter. It would be 1mA per dB of gain reduction for a 20dB scale, and you'd need a 100 ohm resistor. Right?
Is my math ok, or there something I'm missing with these dB to GR to FS deflection ratios?
According to Jakob, with a 2K meter resistor, 50uA is equal to 1dB GR on a 20dB scale for a 1mA meter. For 10dB scale on a 1mA meter it's 100uA per dB with a 1K resistor.
But, if I wanted to use a 2mA meter, with a 20dB scale, it's 100uA per dB for a 20dB scale with a 1K resistor, right? But a 10dB scale on a 2mA meter would require 200uA per dB, so you'd need a 500 ohm resistor...is that correct?
And mathematically, you could use a 20mA meter. It would be 1mA per dB of gain reduction for a 20dB scale, and you'd need a 100 ohm resistor. Right?
Is my math ok, or there something I'm missing with these dB to GR to FS deflection ratios?