does any one know if it´s possible to build (or buy) a "losless" dc-blocking filter for an antenna kabel (for a tuner).
I bought a standard item but it seems to dampen the signal as I can´t receive as many radio channels as before.
<a href="http://www.epanorama.net/circuits/antenna_isolator.html">Isolation between antenna network and TV/radio equipment</a> shows how to make both transformer and cap isolators, but no mention of loss.
Mondial designs makes the <a href="http://www.klipsch.com/mondial/index2.asp?path=/products/mondial/index.asp?frame=y&id=&line=&1">Magic Box</a> and <a href="http://www.klipsch.com/mondial/index2.asp?path=/products/mondial/index.asp?frame=y&id=&line=&1">Magic Splitter</a> still no mention of loss.
You may need an antenna amplifier or a higher gain antenna to overcome the loss of the DC filter
Solved: my "ground-breaker" are two coupling capacitors of 1 nF soldered into the antenna plug, one for the shield and one for the hot wire. The mean thing is: yanevano which lead to dc-interrupt: shiled or hot wire. So i have both decoupled .
I used silver mica caps, no problem with sonic deterioation, no problems with loss. I have very tricky UHF receiving condition here (i want to get Austria 1 classic radio and the roof antenna is not adjusted for it; i get it as well with as without the coupling caps).
for now I think I´ve solved the problem by raising the ground with a 5 Ohm resistor (Naim power supply) When this doesn´t work I´ll try your method although it´s not so easy to get the silver mica caps.