topic Re: Router 12v in Broadband

Router 12v

billynomates37 — Mon, 02 Jun 2025 11:47:05 GMT

Hello.

Im having my broadband installed tomorrow. The router cable will not be long enough to reach the power source.

Have seen extensions on Amazon. Anyone out there know what the male/female size is need.

It's the black router.

Re: Router 12v

JimM1 — Mon, 02 Jun 2025 12:18:12 GMT

@billynomates37 What are you having installed tomorrow that requires the change to the power source length for the low voltage cable.

You would be quicker to run a single socket mains extension than try to find a barrel adapter cable of BOTH correct sizes to fit, but looks like it is a 4mm x 1.7mm but do not hold me to that fact....

Re: Router 12v

billynomates37 — Mon, 02 Jun 2025 12:30:00 GMT

The router sits on a corner shelf above a power socket. I'm short by a few inches(story of my life).

Its either an extension lead or move the shelf down which will be added faff.

The supplied ethernet cable is also too short but I have a longer one I can use.

Re: Router 12v

JimM1 — Mon, 02 Jun 2025 12:55:21 GMT

@billynomates37 As i say do not hold me to the sizes but have a look, try and measure the plug for yourself....

4.0mm x 1.7mm Female to 4.0mmx1.7mm Male DC Power Plug Extension Cable DC Power Adapter Cord 5ft 1.5M 1.5 Meters long : Amazon.co.uk: Electronics & Photo

Re: Router 12v

billynomates37 — Mon, 02 Jun 2025 13:04:52 GMT

I've tried to measure but 2.1 and 2.5 look very close.

Will order one of each i can always return them.

Thanks for your help

Re: Router 12v

JimM1 — Mon, 02 Jun 2025 13:10:23 GMT

@billynomates37 Never even thought to ask, but i was looking at the adapter on the SR203 hub, just so you know. My bad....

Once you know the correct do post it up will take away any future guessing.

Re: Router 12v

billynomates37 — Mon, 02 Jun 2025 13:13:33 GMT

Will do

Re: Router 12v

Deb3000 — Mon, 02 Jun 2025 16:22:42 GMT

Old techy's tip. You can use metric drill bits as a gauge. If a 3.0 doesn't fit try a 2.5, if that doesn't fit it will be a 2.1. Simples!

Re: Router 12v

billynomates37 — Mon, 02 Jun 2025 16:28:59 GMT

Excellent tip.👍

Re: Router 12v

AlluZeff — Tue, 11 Nov 2025 23:03:35 GMT

So, was it 2.1 mm or 2.5 mm in the end?

Re: Router 12v

Kash15 — Thu, 22 Jan 2026 02:18:37 GMT

What size is it?

Re: Router 12v

Chrisee — Thu, 22 Jan 2026 08:11:19 GMT

@Kash15 different Sky hubs have had different power supplies while you maybe lucky there is no standard regarding barrel connectors. Using a mains extension is far safer. The white Sky hubs up until recently had a USB-C connection which can be used to provide power.

Re: Router 12v

Sue_Doe — Thu, 22 Jan 2026 14:09:42 GMT

If you do insist on a low voltage extension, the easiest way to size the plugs is to use a set of metric drill bits as gauges.

If a 3mm bit fits, it’s a 3.0mm plug. If not try a 2.5 bit. If that doesn’t fit, it’s almost certainly a 2.1mm plug.

Re: Router 12v

sparky+1001 — Thu, 02 Apr 2026 21:35:20 GMT

In case anyone else is still looking, my SR203 was delivered today and I had the same question. Yours of course may be different, but the power connector on mine is definitely 4.0 x 1.7mm.

Re: Router 12v

sparky+1001 — Sat, 11 Apr 2026 15:33:45 GMT

More info; The 4x1.7mm sockets I ordered to make up my extension cable arrived today. They don't fit. Turns out that while the socket on the router happily takes and reliably powers up on a 4x1.7mm plug, the plug on the Sky supplied power block actually measures 4.8x1.7 mm. As if there aren't already enough low power DC connector types.