advice about radio interference please

i am sorry lin i dont understand your reply

lin q
Installing solar does take some time but isn't complicated.

pepper2.
Possibly the switching of the MPPT is what is causing the interference on AM band.
The system may benefit from having a DC line filter added either before, or after, or both both sides of the MPPT.
It would have to be heavy wiring conductor so no resistance to the dc flow is seem by either the MPPT or the battery.

One of the forum members is a radio repair tech and may have some options.

Cheers
Ross M

I have used them on LED trailer lights with no success!

Havent thought of a farradays cage might try it.thankyou.

Isn't the AM band being switched off like the analogue TV?
Won't be able to listen to it!

bill

Am also interested. I thought that they didn't know what to do in remote areas. May still need the HF AM band. VHF and UHF for general population coverage is fine in populated areas. But not in the bush. Interesting. Hmmm

Mainly posted to watch this topic.

Phil

I got my answer. What we commonly refer to at the moment as "AM" will be switched off. However the content or broadcasters will still be transmitting their programs. The transmission will use a new mode either, DRM or DRM+. It will still be in the MF band and still available "in the bush". We will need a new radio to receive and convert the DRM modulation to audio.

From a paper at ACMA: ACMA - Digital Radio

Digital Radio Mondiale (DRM) is another digital radio standard that is gaining international support and may be seen as complementary to DAB+. DRM was initially developed to operate in broadcasting bands below 30 MHz, including the current medium frequency (531-1602 kHz) AM broadcast band. The latest version, often referred to as DRM+, operates in the bands below 30 MHz as well as in VHF frequencies up to 108 MHz. Australia currently uses these VHF frequencies for analog FM radio broadcasts.


Phil

Does anyone know what DRM's susceptibility to interference is like?

Phil

Jim,

Was getting a bit worried with all this talk of AM being switched off, so checked the ABC's site. No planned "turn-off" date at this stage, and "upgrading of transmitters would depend on funding" unquote. So no doubt remote areas will have analogue AM/FM for some years to come.

Also said that "digital radio offers interference free, digital quality sound" unquote.

Can imagine they would be keen to remove/upgrade many of the isolated transmitters, that are pumping out 10kW every day. Must be some cost savings with digital radio technology?

http://www.abc.net.au/reception/radio/digitalradio.htm

Also mention of DAB upgrade for current AM/FM car radios. Imagine JB Hi-Fi & other outlets would be rubbing their hands together if we all had to fork out for new in car entertainment!!!

Bob.

I wouldn't race out and get a DRM receiver just yet. There are no, zero, nilch plans to switch off AM and FM for at least 35 years.

DRM is primarily aimed at Short Wave at the moment.

With the huge take up success of DAB ( not), the broadcasters will have a riot if the government even hints at an earlier date.

DAB, and I suspect DRM are technologies with no need and little market and DRM is not compatible with low volume, low density markets like Australia.

Neither would I. It also covers the broadcast band from 531-1602 kHz.

They may never do it. That's a lot of area and cost for such a small return. Especially if Aunty if was privatised.

I was looking at getting one of those PK Loop antennas. Simple question: Do they work?

I would expect that they work with the car AM and any external radio antenna. Do they?

Phil

Phil I have a similar Chinese loop Antenna from Tecsun.

Tecsun loop antenna

Basically the same thing but production built and about $30 delivered.

Does it work, you bet it does. You will not believe how good it is. I have a few radios and just sit them inside the loop.

You can tune into a station and get nothing other than noise. Put the radio in this loop, tune the antenna and you will get a great full strength signal. If your radio takes external antenna that works too. I promise you won't believe how good it is. No batteries either. I have used it in the outback, in the high country and in NSW. I would not go camping without it.

It is directional so you have to turn it around for best signal, but it can also eliminate other noise like a fridge or Solar charger.