My HTPC came with dual digital TV tuners (two cards).
It works fine with just one connected but if I split the leads to connect
both with a normal splitter I lose most of the stations.

I had a new antenna fitted when I switched to freeview about five years ago.
I worked fine with the Freeview box 'most of the time' - in 'bad' weather I
do sometimes get freeze frames or pixilation.

I already have an 6db gain amplifier in the roof space to split the signal
into three rooms, though only one is actual used/connected.
Should Terminators be fitted to unused sockets - mine do not have them.
Does this make a big difference?

What are my best options?
A more powerful roof space Amp, a second amp splitter next to the PC, a
better antenna, or is there something else I could try

TIA
Slatts