group d amp help

deaglan169

hi i bought a group D i think it is amp for clermont rte if ITS not group D then its B all i know is its the right one covers CH48-68 i connected it up today place amp fairly close to antenna and put screw in combiner box for dc pass and measured 12v at amp but it has made my pictures worse

Finne1993

Clermont is in the C/D group, you probably don't need any amplification anyway, might be an attenuator you need, the power from Clermont is very strong. Are you far away from the transmitter?

deaglan169

im outside monaghan town signal is ok but could do with amplification just to sharpen picture, tv3 and tg4 are the waeker

peadar99

You should be able to receive a decent signal in Monaghan, I would have thought. There shouldn't be any problem with mountains or anything from that direction.
I'm about the same distance from it as you [down in Cavan, though], and it comes through fine here, with no mast amplification [including the DTT signal, for that matter].

A couple of things to check in case you hadn't already done it -
From Monaghan, you should be pointing the aerial a bit south of East.
Clermont Carn broadcasts with vertical polarity, so you need to have the aerial mounted with the tines pointing up and down rather than horizontal.
The channel numbers you've tuned should be as follows -
RTÉ1 - Ch52; RTÉ2 - Ch56; TV3 - Ch66; TG4 - Ch68;
[If you've an MPEG4 Digital tuner, the PSB Mux is on Ch53 as well]
If you're tuned into different channels, it's possibly a different mast you're getting a signal from, and it's unlikely to be as strong a signal at all.
If the aerial's not in the right direction, or if it's horizontal, you might be picking up a faint signal from another mast.

Cheers,
Peadar.