Sony CMT-ED1 Shelf System
Problem for Sony CMT-ED1 Shelf System

No FM reception on CMT-ED1 Sony shelf system




By fixya689 on May 27, 2009

" "
20 years in IT and I can't get any FM reception. AM is OK. I bought it for £5 supposedly in working order.


Best wishes,

Martin

http://www.martinhwatson.co.uk/puzzle_news.html

Martin H. Watson
Comments:

May 27, 2009

- Hello, I've got the AM antenna that was provided. There is a socket for an FM coax cable. Shouldn't I still be able to get FM without a dedicated aerial?

Thanks for your help.

Best wishes,

Martin

http://www.martinhwatson.co.uk/puzzle_news.html

Martin H. Watson

May 27, 2009

- I've taken one of those long plastic coated aerials off another system. It is like a 'T' with a very long leg. Strangely, it doesn't fit into the coax on the back of the Sony system. It's a gender problem I think, but it seems strange that the coax socket on the back of the Sony is different to the one on the back of the other system. The Sony socket doesn't have a rod or tube inside it.


Best wishes,

Martin

http://www.martinhwatson.co.uk/puzzle_news.html

Martin H. Watson

May 27, 2009

- Neither the end of the aerial, nor the Sony socket is threaded. Is there anything here that is suitable:

http://shop.ebay.co.uk/items/__75-coax_W0QQ_kwZ75QQ_kwZcoaxQQ_ckwZconverter?_trksid=p3286.m104.l1199

Martin

May 27, 2009

- Charlie, thanks for that. I've found similar from a UK radio shop, I'll try and get one tomorrow. I've never seen such a thing before. I'm puzzled why the aerial just doesn't plug in.

Thanks for your help, you've brightened up a wet and windy day in London!!


Best wishes,

Martin

http://www.martinhwatson.co.uk/puzzle_news.html

Martin H. Watson

Clarification Request

Posted by scspriggs on May 27, 2009

Are there FM antenna terminals/connectors on the back of the unit -- maybe marked 300 and 75 ohms?

Best Solution

posted on May 27, 2009
Very Helpful)

scspriggs

Rank: Guru 
Rating: 91%, 613 votes
There is hardly ever an internal FM antenna -- only AM. You'll need at least one of those twin-ax dipole antennas (there's one with every receiver bought).

You can test the concept just by putting a single piece of wire on each antenna terminal -- when you do this reception should improve immediately, but will not be as good as with the dipole antenna.
Comments:

May 27, 2009

- You need a 75 ohm coax to 300 ohm twin-ax converter. This will plug into the coax connector on the back and give you two screws to attach the 'T' antenna.

May 27, 2009

- Great!!

Last time I was in London the weather was wonderful and Concord Jets were flying overhead to/from Heathrow (or was it Gatwick?).

If you could rate my response as a "problem solved", I would greatly appreciate it -- I think you will see icons at the bottom of the screen. thanks

Good luck with the FM!

Charlie
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