"F"ing F-connectors

[nev]

The Scenario
Long story short
Ive got a 4way hills splitter under the house
Ive installed a Masthead amplifiers with the power injector inside the house
Now The splitter has nothing attached to it and it is screwed to the brickwork.
The power injector puts out 15VAC
Under the house I measure 15VAC between Dielectric(core wire) and the shield of the Coax coming from power injector.
When I just put the dielectric into the Splitter I measure the voltage at the antenna input i get 15VAC as it could be.
So the voltage is getting though to power the Mast head amp
So when I attach the shield (Do up the nut) the voltage drops to 1.3vac
So the masthead wont work
IT seems like something in the shield is dragging it down but I cannot see how??
Its got me??
And before someone says
yes both are connector to the power pass terminals of the splitter

[Chieflets]

Nev,

1. check for shorts in f connector
2. fualty spiltter


Chieflets

[nev]

Nev,

1. check for shorts in f connector
2. faulty splitter


Chieflets

Shorts-I checked thinking that when the Connected was screwed in there may be a strand of shield touching the dielectric but I couldn't see a problem

Faulty Splitter-Doesn't answer the fact that I am getting voltage until the shield is connected

[cwispy]

How about the centre core being too long out of the F connector and actually shorting something in the splitter? It should only be able 2mm past the F Type

[Micksxboxmods]

How about the centre core being too long out of the F connector and actually shorting something in the splitter? It should only be able 2mm past the F Type

yes this is right, the stinger should only be 2-3mm long past the end of the connector. Also check that no dielectric has been left on the stinger.
Mick

[porkop]

Spliters are made up of Inductors and capicators in various arrangments. It is possible that an inducter will appear across both the centre and earth of a cable. Remember you are dealing with RF in a splitter and having a "short" can mean nothing to it.

what you need is a splitter that allows DC to pass through one leg of it. normally called a power pass.

I put my money on the fact that your are loading down the DC side of things!

Another option would be to put teh power injector on the masthead antenna side of things inbetween the splitter and amp.

2c worth

[nev]

And before someone says
yes both are connector to the power pass terminals of the splitter

LOL theres always one
Thanks anyway

[porkop]

Damn speed reading course!!!!!!!!

[nev]

After numerous frustrating hours
And after bypassing the splitter (and getting no signal at all)

I emailed Hills Antenna and got a return call from a tech person at hills who was very helpful

He suggested that there may be a short in the F-Connector (As someone had suggested)at the injection end (TV end) so that when the Shield of the coax touched the chassis of the splitter it created a loop and reduced the voltage at the input (Antenna port)of the splitter

So I pulled the wall plate off and carefully re terminated the F-Connector checking for shorts stray wires etc.

Put it all back together and same problem when I attached the shield to the splitter(Do up the nut) the voltage drops to 1.3vac

Now I remember on the back of the wall plate connector there was a capacitor
I assume it was a between shield a core as some sort of RF filter

Am I right to think this is my problem and should be it should be removed

[Lungy]

Am I right to think this is my problem and should be it should be removed

Could not be much else left to try

ps have you got the cable from the splitter to amp connected to the output from the amp not to the antenna input(just checking have done this myself and I`m a experienced installer)

[grunter375]

try using a splitter that has no caps in it e.g. IKUSI they are a direct connection

[pieces]

[QUOTE=nev;7450]The Scenario

" So the voltage is getting though to power the Mast head amp
So when I attach the shield (Do up the nut) the voltage drops to 1.3vac "

" Now I remember on the back of the wall plate connector there was a capacitor
I assume it was a between shield a core as some sort of RF filter "

1, If this capacitor is in series (used for DC isolation no use here ) with the core to the injector this would give you a voltage until a load was applied by the Head.Try a normal plate with just the connector.
2 , Check you are connecting to the correct socket on the masthead amp.
3 , Or a high resistance somewhere same result voltage ok till a load is applied check all connectors .
3 , The Head is faulty maybe .

To make it easier prove remove the the components and knock it up on a table using short cables.

Good luck

[Philquad]

its the wall plate
bypass it,bet it works

[astro_boy]

That or please don't tell me your using screw on f connectors...