Dynatron Ether Stereo - connecting an aerial - UK Vintage Radio Repair and Restoration Discussion Forum

w0lfman · 1st Aug 2009, 1:34 pm

Hello there,

I've just got my hands on a massive Dynatron hi-fi set, and I was wondering whether you fellows could give me a hand with finding out how I can attach a radio aerial. I've attached two pictures:

- an interesting looking knob on the bottom with a fibrous uninsulated wire attached (this may be the aerial attachment I'm looking for)
- the sockets on the back of the hi-fi... I'd appreciate any help with what the two white mouldings do.

Thanks,
Rhodri

Alan Stepney · 1st Aug 2009, 2:32 pm

The two white mouldings are indeed aerial sockets, one for FM the other AM.

It would be quite common to have an FM aerial made from a piece of 300ohm ribbon, split and splayed out horizontally.
For AM, often a single wire was used, and it is possible that the wire in your first picture, was a "pseudo frame aerial" that would have been pluged into the AM socket.

Someone who knows that partcular model may be able to give more information.

'LIVEWIRE?' · 3rd Aug 2009, 7:46 pm

Those sockets are, as Alan says, FM & AM Aerial sockets. Standard(IEC?)Plugs, obtainable from Maplin, etc. fit them. The FM one is designed to match a 300 Ohm balanced feeder(i.e. a 'ribbon' connector) so if a UK standard aerial with a coaxial cable is to be used a 'balun' will be needed. BTW that wire underneath is an earthing link.

Herald1360 · 3rd Aug 2009, 7:57 pm

If you're in a strong signal area, you can probably get away with one of the simple folded dipoles made out of 300ohm feeder type of indoor aerial (or make up your own).

These consist of one length of feeder about 5' long with each end shorted plus another piece any length you like connected between the aerial socket on the tuner and a break at the centre of one side of the 5' piece so that one side of the set feeder connects to one side of the break and the other to t'other. This will not need any balun as it's 300ohm balanced to start with. Commercial ones have nice little bits of plastic to tidy up all the joints and provide convenient mounting points but it'll work just as well without and a couple of drawing pins to attach it to the wall or similar

Chris

Nickthedentist · 4th Aug 2009, 5:33 pm

Quote:

Originally Posted by 'LIVEWIRE?'

Those sockets are, as Alan says, FM & AM Aerial sockets. Standard(IEC?)Plugs, obtainable from Maplin, etc. fit them.

I think they're DIN plugs rather than IEC. They haven't been used for ages, and are a bit hard to track down nowadays.

You can always poke a bit of stiffish wire into one of the holes in an "emergency" though.

N.

georgesgiralt · 8th Aug 2009, 5:16 pm

Hi !
I'm late on this one, but..;
These connectors were used in Germany designed sets. Of course they disappeared.
I had luck using banana jacks into them. Instead of trying to insert the 4mm kind, get a couple of miniature 2mm one. They fit nicely ;-)

1st Aug 2009, 1:34 pm	#1
w0lfman Retired Dormant Member Join Date: Aug 2009 Location: Cambridge Posts: 1	Dynatron Ether Stereo - connecting an aerial Hello there, I've just got my hands on a massive Dynatron hi-fi set, and I was wondering whether you fellows could give me a hand with finding out how I can attach a radio aerial. I've attached two pictures: - an interesting looking knob on the bottom with a fibrous uninsulated wire attached (this may be the aerial attachment I'm looking for) - the sockets on the back of the hi-fi... I'd appreciate any help with what the two white mouldings do. Thanks, Rhodri Attached Thumbnails

1st Aug 2009, 2:32 pm	#2
Alan Stepney Rest in Peace Join Date: Feb 2008 Location: Dorset, UK. Posts: 947	Re: Dynatron Ether Stereo - connecting an aerial The two white mouldings are indeed aerial sockets, one for FM the other AM. It would be quite common to have an FM aerial made from a piece of 300ohm ribbon, split and splayed out horizontally. For AM, often a single wire was used, and it is possible that the wire in your first picture, was a "pseudo frame aerial" that would have been pluged into the AM socket. Someone who knows that partcular model may be able to give more information.

3rd Aug 2009, 7:46 pm	#3
'LIVEWIRE?' Rest in Peace Join Date: Mar 2006 Location: N.W. Oxfordshire(Chipping Norton) Posts: 7,306	Re: Dynatron Ether Stereo - connecting an aerial Those sockets are, as Alan says, FM & AM Aerial sockets. Standard(IEC?)Plugs, obtainable from Maplin, etc. fit them. The FM one is designed to match a 300 Ohm balanced feeder(i.e. a 'ribbon' connector) so if a UK standard aerial with a coaxial cable is to be used a 'balun' will be needed. BTW that wire underneath is an earthing link.

3rd Aug 2009, 7:57 pm	#4
Herald1360 Dekatron Join Date: Feb 2007 Location: Leominster, Herefordshire, UK. Posts: 16,536	Re: Dynatron Ether Stereo - connecting an aerial If you're in a strong signal area, you can probably get away with one of the simple folded dipoles made out of 300ohm feeder type of indoor aerial (or make up your own). These consist of one length of feeder about 5' long with each end shorted plus another piece any length you like connected between the aerial socket on the tuner and a break at the centre of one side of the 5' piece so that one side of the set feeder connects to one side of the break and the other to t'other. This will not need any balun as it's 300ohm balanced to start with. Commercial ones have nice little bits of plastic to tidy up all the joints and provide convenient mounting points but it'll work just as well without and a couple of drawing pins to attach it to the wall or similar Chris

8th Aug 2009, 5:16 pm	#6
georgesgiralt Hexode Join Date: Jul 2008 Location: Toulouse, France Posts: 406	Re: Dynatron Ether Stereo - connecting an aerial Hi ! I'm late on this one, but..; These connectors were used in Germany designed sets. Of course they disappeared. I had luck using banana jacks into them. Instead of trying to insert the 4mm kind, get a couple of miniature 2mm one. They fit nicely ;-)