How to wire Hirschmann FESA 817N37 Aerial

galait

Plan to use this in Cavan to pick up Freeview from Brougher Mountain , The cable connection is PCB and Plastic , Does anyone know how to cut cable for it

http://www.vanjak.com/index.php?dispatch=products.view&product_id=29921

12 element

I'm assuming what you're describing is this type of connection, this is the best picture I could find to show how it should look.
Peel back the outer layer to expose the braid in the coax and fold that back and this is clamped in contact with the clamp at the bottom part. you also have to remove some of the inner insulator to revel the centre conductor be careful not to 'nick' the centre conductor when doing this. this is then screwed in place using the little screw at the top part.

Hope that this makes sense!

galait

Thanks but its is nothing like that , The Thumb screws are even plastic , The inner core is simply trapped by a small block of plastic which holds the cable against the PCB.

Tom Slick

A picture's worth 1000 words . . .

mullingar

Post a picture of the PCB!

galait

With recent developments going to give this another go

Peter Rhea

I've never seen one of these 'in the flesh', but it just looks like the braid goes in one of the metal clamps or 'grooves' & the inner in the other & the prongs on the red plastic part hold them in place.

Maybe it's the 'symmetrical' connection referred to in the Hirschmann literature, in which case I suppose you would separate the braid & inner to each side, by making a 'pigtail' of the braid.

Where is the cable entry point?

galait

Peter Rhea wrote: »

I've never seen one of these 'in the flesh', but it just looks like the braid goes in one of the metal clamps or 'grooves' & the inner in the other & the prongs on the red plastic part hold them in place.

Maybe it's the 'symmetrical' connection referred to in the Hirschmann literature, in which case I suppose you would separate the braid & inner to each side, by making a 'pigtail' of the braid.

Where is the cable entry point?

Thanks , It says Koax Symm so must be symmetrical ! on the PCB , If you look at the photo.jpg from my 1st post the cable enters from the right , Do you think the red clamp is for trapping both the inner core and the braid onto the silver plate side by side but not touching ?

sorry for the double post

Peter Rhea

I'm just guessing, but it looks like one side of the red clamp would hold the dielectric in place, with only the end part in the 'groove' being stripped & the other would hold the braid.

galait

Peter Rhea wrote: »

I'm just guessing, but it looks like one side of the red clamp would hold the dielectric in place, with only the end part in the 'groove' being stripped & the other would hold the braid.

Makes sense , I will give it a go later and let you know ,

byte

Peter Rhea wrote: »

I'm just guessing, but it looks like one side of the red clamp would hold the dielectric in place, with only the end part in the 'groove' being stripped & the other would hold the braid.

That is correct.

Looking at the first picture, the stepped part visible is what clamps the braid, the dielectric goes over the wee plastic bridge and is secured by the front part of that red clamp thingy!

Just be careful reassembling then, as the cable has to be forced down a bit as you reattach it to the housing on the dipole.

I've also used long cable ties to "hold up" the dipoles as they're stupidly weak (long plastic cable ties from edge of dipole to one of the rails of the reflectors), and birds liek nothing more than perching on them and bending them downwards!

If you're in a more rural area, this might be less a problem...