What is the name used to order TV wall plates?

[ericmark]

the wall plate shown has decoupling capacitors, these are really good when connecting direct to aerial at stopping belts from static build up specially in high wind.

However are a real pain when supplying a mast head amplifier or taking TV to another room where a digieye is used.

So when ordering how do you know which you are getting? In the main I want plates without the decoupling, but on the odd time I want them. But can't find a name or BS or BS EN number which tells you which are which.

Sorry picture shows in edit but not after edit

 

[rsgaz]

In the past, I have just soldered a big blob of solder onto both of the legs of the capacitor. This way, you have the best of both worlds, it can be undone easily in the future if needed.

Most sellers (particularly on eBay,Amazon,etc) don't seem to bother stating whether they are or not, so you're having to rely on them showing an image of the rear and checking the PCB for yourself. e.g. coupled faceplate...

Gaz

 

[winston1]

Wallplates like the one shown anyway are crap anyway. Little point in getting the best WF100 cable then putting an unscreened wallplate on the end of it.

 

[aptsys]

the wall plate shown has decoupling capacitors, these are really good when connecting direct to aerial at stopping belts from static build up specially in high wind.

However are a real pain when supplying a mast head amplifier or taking TV to another room where a digieye is used.

So when ordering how do you know which you are getting? In the main I want plates without the decoupling, but on the odd time I want them. But can't find a name or BS or BS EN number which tells you which are which.

Sorry picture shows in edit but not after edit

They would normally be sold as isolated or non-isolated outlets. Decoupling capacitors are something else and not applicable.

 

[aptsys]

If MK Logic Plus outlets are suitable, K3520WHI is the non-isolated variant, and K3521WHI is the isolated one.

 

[DetlefSchmitz]

They would normally be sold as isolated or non-isolated outlets. Decoupling capacitors are something else and not applicable.

They sound like decoupling capacitors to me. Are you thinking of bypass capacitors, which often get called decoupling capacitors for some reason?

 

[ericmark]

If MK Logic Plus outlets are suitable, K3520WHI is the non-isolated variant, and K3521WHI is the isolated one.

Thanks, that at least answers part of the question, the BS 5733:2010 etc applies to both types, so it is simply the words non-isolated and isolated which separate the two types. Also it states:-
2. Non-isolated Outlets are intended direct connection to the Aerial download.
3. Isolated Outlet provide safety isolation to 2kV between the Aerial lead and coaxial socket. They are not suitable for use in systems where DC signals are passed through the socket (e.g. where masthead/ headend equipment is controlled by receiver/decoder equipment.

2kV would not stop a lighting strike, but would likely stop static build up from reaching the house holder. In both cases it is screened.

My personal view is the K3520WHI is the non-isolated variant is great for inter room links, and to connect to a mast head amplifier or loft mounted aerial, where if the aerial is mounted outside then the K3521WHI is the isolated one is more appropriate. However there does not seem to be any official direction as when to use the K3521WHI which is the isolated one, only clearly where DC power is required then the K3520WHI is the non-isolated variant has to be used.

I have also noted with some TV's using a switched mode power supply you can get a voltage from the aerial connection which although not dangerous as current is very limited, it could give anyone working on the aerial a shock which it turn could cause them to lose balance, it's not the high or falling which does the damage, it's the hitting of the ground.

 

[aptsys]

They sound like decoupling capacitors to me. Are you thinking of bypass capacitors, which often get called decoupling capacitors for some reason?

They're capacitors for AC coupling.

I have also noted with some TV's using a switched mode power supply you can get a voltage from the aerial connection which although not dangerous as current is very limited, it could give anyone working on the aerial a shock which it turn could cause them to lose balance, it's not the high or falling which does the damage, it's the hitting of the ground.

The current gets quite substantial if you have a fair amount of equipment attached. I've measured between 50 and 750uA on various devices, so the sum could be alarmingly high.