Have just started using Freesat via my Sky dish and LNB. Am thinking of getting a recording unit for Freesat. I take it I will need at least a dual lnb, for what reason would any-one need a quad lnb which I see is available.

my lnb has 6 ports on it,
2 needed downstairs on main tv hd plus(sky)
2 needed in my bedroom plus
and 1 each to the other 2 bedrooms for normal sky.

If its a standard Sky dish they don't make a dual LNB only a quad or octo. Advantage of the quad is two spare ports for either two single tuner boxes in other rooms or an extra twin tuner box.

It's a dish and lnb I bought online for DIY installation and free Sky reception.
I've just purchased a freesat box and have disconnected the dish from the sky box and connected it to the Freesat box. Was thinking of a recorder for Freesat in future, am I right in assuming a quad lnb will give me facilities to eventually run Freesat and Sky (free) side by side, both with recording facilities (with the proper boxes of course) Do I need an adapter to fit a quad lnb to the present holder on the Sky type dish.
Many thanks.

Depends on the type of SKy dish and the LNB you have bought, the latest LNBs for the current MK4 minidish need a what's called a legacy adaptor to fit the older type dishes. Not many quads will fit the original 1998 channel master MK1 minidish.

A picture of the dish would be good.

Fitting the quad would allow a freesat plus and SKy plus box to work from the same dish two outputs to each recording box.

Thanks, I've since measured the section that the lnb fits into @ 20x30mm.
Seems to me as though it's a Mk3 ??

See the info. here: http://www.satcure.co.uk/accs/quad_sky_lnb.htm
You should be able to determine what you have from that.

(The only difference between MK2 & MK3 was that one used a separate plastic "pin" and one used plastic "tags" to secure the LNB holder in the arm.)