Hi Bob,

The main problem with VDSL, and before that ADSL in the UK, is that the Telecom provider only really ad responsibility up to the wall plate, the rest was self installed.

The best you could hope for was that the Teelcoms company would turn up and replace the existing wall plate with a correctly filtered version, but more often that not, you would simply receive a modem in the post along with some line filters, that were supposed to be fitted between the phones in use and the modem itself.

The problem with this is that very often people had installed additional phone sockets, and either didn't bother fitting the filters, or fitted them in the wrong places, so they didn't do what they were supposed to.

UK phone sockets also had a third wire which separates out the bell circuit. This was a legacy of the older phones with rotary pulse dialling, which used to cause the bell to ring when a number was dialled. This wire was often referred to as the 'anti tinkle circuit', and it has the effect of unbalancing the otherwise balanced pair used for the modem and speech circuits.

One final issue is that, unlike in some other countries, there was no notching of the Amateur bands, even though the equipment had the capability, it was never implemented.

Fortunately there is a big push to move everyone across to fibre to the home by 2025, so hopefully the DSL problems will simply go away.

Ethernet mains adaptors are a separate issue. Modern home routers and mesh connected nodes are a lot better at providing whole house coverage than original wireless routers used to be. But I think folks who did once require them, and may no longer need them at all, are still leaving them running because they don't realise that they are no longer doing anything other than adding to the electricity bill. Fortunately the majority of these are notched, so the problem is a lot less worse than it could have been, and I guess that a lot of them will soon be reaching the end of their life and simply pack up.

Even the other bane of interference, switched mode supplies and 'wall wart' chargers, actually seem to be getting better, and some I've acquired recently, that were supplied with various new products, have been pretty tame, especially in comparison to some older models that? were also made in China.

Interference hunting and 'killing' can be a hobby in its own right.

Regards,

Martin

1. I have got a TinySA initially for building a HF receiver.? I thought it can be used for sniffing the IF oscillators and crystals with the probes for RF and possibly tells what the frequency is and what sort of output power is oscillating from them.

2. Sometimes, I try to check RF sources in the house for detecting any stray or mysterious RFs floating around.? So far my TinySA detected 1x RF source at 225 Mhz, and it seems coming from the outside across the main road, in some garage, or next door neighbors house.

3. And I used the TinySA as a signal generator, and seen the sine waves in my handheld oscilloscope.

So what do you yours for most, and what other purposes? And how do you feel about the device? Is it still a good device good value for money in your opinion?

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