old grumpy – 1 hour ago »
Thanks again for the help.As a matter of interest i did an auto retune and achieved practically the same results ,ie no signal on 55. I have 2 other tvs , on a different aerial, still pointing the same way, and have perfect reception on all hd channels including 55.Suggests that the problem is the humax machine.
The fact that you have a second aerial does not mean that they will both perform the same, one may have a different frequency response to the other. Also if they are mounted close together, one may be adversely affecting the other.