DC Blocker Specification down to 1kHz
We allready use a quite big capacitor (470nF) so the DC blocker will work even at quite low frequencies but at 1kHz you will have a very high loss. I have some data at higher frequency points which i can give you:
23MHz = 0,1dB
10MHz = 0,5dB
4MHz = 3dB
As you can see you would have a very high loss at 1kHz.