Strange Aerial connection
 

I've got an old Aiwa Reciever, probably dates back to the 70s or early 80s -
massive heavy aluminium front, needle tuner etc. Anyway, it's got a rather
strange connector on the back for the antenna - 3 holes in a row marked "FM
Aerial". Any ideas on what I should be hooking up to it?

Strange Aerial connection
 

On Wed, 9 May 2007 15:16:42 +0100, "Doki" wrote:

I've got an old Aiwa Reciever, probably dates back to the 70s or early 80s -
massive heavy aluminium front, needle tuner etc. Anyway, it's got a rather
strange connector on the back for the antenna - 3 holes in a row marked "FM
Aerial". Any ideas on what I should be hooking up to it?

A FM aerial? :-)

I suppose it might be a combined 75 ohm/300 ohm connector. Try your
FM downlead into any pair of holes, see which work best! I suppose
it might be worth looking for a voltage on any of the holes first,
just in case it's some special arrangement for e.g. powering a
mast-head amplifier.

Strange Aerial connection
 

"Laurence Payne" lpayne1NOSPAM@dslDOTpipexDOTcom wrote in message
...
On Wed, 9 May 2007 15:16:42 +0100, "Doki" wrote:

I've got an old Aiwa Reciever, probably dates back to the 70s or early
80s -
massive heavy aluminium front, needle tuner etc. Anyway, it's got a rather
strange connector on the back for the antenna - 3 holes in a row marked
"FM
Aerial". Any ideas on what I should be hooking up to it?

A FM aerial? :-)

I suppose it might be a combined 75 ohm/300 ohm connector. Try your
FM downlead into any pair of holes, see which work best! I suppose
it might be worth looking for a voltage on any of the holes first,
just in case it's some special arrangement for e.g. powering a
mast-head amplifier.

I've only got the boggo bit of wire with a connector on the end as supplied
with cheap mini systems and a proper RF connector aerial. Nothing that'll go
in the holes provided.

Strange Aerial connection
 

Laurence Payne wrote:
On Wed, 9 May 2007 15:16:42 +0100, "Doki" wrote:

I've got an old Aiwa Reciever, probably dates back to the 70s or early 80s -
massive heavy aluminium front, needle tuner etc. Anyway, it's got a rather
strange connector on the back for the antenna - 3 holes in a row marked "FM
Aerial". Any ideas on what I should be hooking up to it?

A FM aerial? :-)

I suppose it might be a combined 75 ohm/300 ohm connector. Try your
FM downlead into any pair of holes, see which work best! I suppose
it might be worth looking for a voltage on any of the holes first,
just in case it's some special arrangement for e.g. powering a
mast-head amplifier.

My guess is that the outer two are for a 300 ohm balanced downlead with
the centre pin being ground. If so, then either connect a balanced lead
to the outer two pins, or a coaxial cable to either one (not both) and
the centre pin. It would be as well to check for volts as Lawrence has
suggested.

S.

--
http://audiopages.googlepages.com

Strange Aerial connection
 

On Wed, 9 May 2007 15:45:21 +0100, "Doki" wrote:

I suppose it might be a combined 75 ohm/300 ohm connector. Try your
FM downlead into any pair of holes, see which work best! I suppose
it might be worth looking for a voltage on any of the holes first,
just in case it's some special arrangement for e.g. powering a
mast-head amplifier.

I've only got the boggo bit of wire with a connector on the end as supplied
with cheap mini systems and a proper RF connector aerial. Nothing that'll go
in the holes provided.

Oh, don't be so helpless! Bodge it! :-)

Strange Aerial connection
 

"Doki" wrote in message
...

"Laurence Payne" lpayne1NOSPAM@dslDOTpipexDOTcom wrote in message
...
On Wed, 9 May 2007 15:16:42 +0100, "Doki" wrote:

I've got an old Aiwa Reciever, probably dates back to the 70s or early
80s -
massive heavy aluminium front, needle tuner etc. Anyway, it's got a
rather
strange connector on the back for the antenna - 3 holes in a row marked
"FM
Aerial". Any ideas on what I should be hooking up to it?

A FM aerial? :-)

I suppose it might be a combined 75 ohm/300 ohm connector. Try your
FM downlead into any pair of holes, see which work best! I suppose
it might be worth looking for a voltage on any of the holes first,
just in case it's some special arrangement for e.g. powering a
mast-head amplifier.

I've only got the boggo bit of wire with a connector on the end as
supplied with cheap mini systems and a proper RF connector aerial. Nothing
that'll go in the holes provided.

Do it the professional way, stick the wires in with matchsticks.
Regards Mike.

Strange Aerial connection
 

"Serge Auckland" wrote in message
...
Laurence Payne wrote:
On Wed, 9 May 2007 15:16:42 +0100, "Doki" wrote:

I've got an old Aiwa Reciever, probably dates back to the 70s or early
80s - massive heavy aluminium front, needle tuner etc. Anyway, it's got
a rather strange connector on the back for the antenna - 3 holes in a
row marked "FM Aerial". Any ideas on what I should be hooking up to it?

A FM aerial? :-)

I suppose it might be a combined 75 ohm/300 ohm connector. Try your
FM downlead into any pair of holes, see which work best! I suppose
it might be worth looking for a voltage on any of the holes first,
just in case it's some special arrangement for e.g. powering a
mast-head amplifier.

My guess is that the outer two are for a 300 ohm balanced downlead with
the centre pin being ground. If so, then either connect a balanced lead to
the outer two pins, or a coaxial cable to either one (not both) and the
centre pin. It would be as well to check for volts as Lawrence has
suggested.

What's one of them then?

Strange Aerial connection
 

On May 9, 3:16 pm, "Doki" wrote:
I've got an old Aiwa Reciever, probably dates back to the 70s or early 80s -
massive heavy aluminium front, needle tuner etc. Anyway, it's got a rather
strange connector on the back for the antenna - 3 holes in a row marked "FM
Aerial". Any ideas on what I should be hooking up to it?

Oh come on you lot, where have you been these last 30 years.

Its one of those plastic connections that come on the end of the pink
aerials we are so fond of. The outer two are for the signal and the
centre is just a plastic locating pin.
The AM version is the same with one of the outers at an angle. Can't
you still buy these ????

I would just stick two long wires in the outer two and hang them
decorously over the picture frame. If you don't have a picture frame
find a friend to hold it up.....

Strange Aerial connection
 

Doki wrote:

"Serge Auckland" wrote in message
...
Laurence Payne wrote:
On Wed, 9 May 2007 15:16:42 +0100, "Doki" wrote:

I've got an old Aiwa Reciever, probably dates back to the 70s or
early 80s - massive heavy aluminium front, needle tuner etc. Anyway,
it's got a rather strange connector on the back for the antenna - 3
holes in a row marked "FM Aerial". Any ideas on what I should be
hooking up to it?

A FM aerial? :-)

I suppose it might be a combined 75 ohm/300 ohm connector. Try your
FM downlead into any pair of holes, see which work best! I suppose
it might be worth looking for a voltage on any of the holes first,
just in case it's some special arrangement for e.g. powering a
mast-head amplifier.

My guess is that the outer two are for a 300 ohm balanced downlead
with the centre pin being ground. If so, then either connect a
balanced lead to the outer two pins, or a coaxial cable to either one
(not both) and the centre pin. It would be as well to check for volts
as Lawrence has suggested.

What's one of them then?
What's one of what?

S.

--
http://audiopages.googlepages.com

Strange Aerial connection
 

"Serge Auckland" wrote in message
...
Doki wrote:

"Serge Auckland" wrote in message
...
Laurence Payne wrote:
On Wed, 9 May 2007 15:16:42 +0100, "Doki" wrote:

I've got an old Aiwa Reciever, probably dates back to the 70s or early
80s - massive heavy aluminium front, needle tuner etc. Anyway, it's
got a rather strange connector on the back for the antenna - 3 holes
in a row marked "FM Aerial". Any ideas on what I should be hooking up
to it?

A FM aerial? :-)

I suppose it might be a combined 75 ohm/300 ohm connector. Try your
FM downlead into any pair of holes, see which work best! I suppose
it might be worth looking for a voltage on any of the holes first,
just in case it's some special arrangement for e.g. powering a
mast-head amplifier.

My guess is that the outer two are for a 300 ohm balanced downlead with
the centre pin being ground. If so, then either connect a balanced lead
to the outer two pins, or a coaxial cable to either one (not both) and
the centre pin. It would be as well to check for volts as Lawrence has
suggested.

What's one of them then?
What's one of what?

A 300 ohm balanced downlead.

Strange Aerial connection
 

On Wed, 9 May 2007 15:16:42 +0100, "Doki" wrote:

I've got an old Aiwa Reciever, probably dates back to the 70s or early 80s -
massive heavy aluminium front, needle tuner etc. Anyway, it's got a rather
strange connector on the back for the antenna - 3 holes in a row marked "FM
Aerial". Any ideas on what I should be hooking up to it?


This might be it

http://www.donberg.ie/descript/a/antenna_1.htm

Send them an email with a photo and they may be able to help you.

d

--
Pearce Consulting
http://www.pearce.uk.com

--
Posted via a free Usenet account from http://www.teranews.com

Strange Aerial connection
 

In article ,
Doki wrote:
I've got an old Aiwa Reciever, probably dates back to the 70s or early
80s - massive heavy aluminium front, needle tuner etc. Anyway, it's got
a rather strange connector on the back for the antenna - 3 holes in a
row marked "FM Aerial". Any ideas on what I should be hooking up to it?

Guess it's a 300 ohm balanced (ribbon) input with the centre being ground.
For 75 ohms co-ax use ground for screen and one of the other connections -
it will be near enough a match.

--
*I'm planning to be spontaneous tomorrow *

Dave Plowman London SW
To e-mail, change noise into sound.

Strange Aerial connection
 

Doki wrote:

"Serge Auckland" wrote in message
...
Doki wrote:

"Serge Auckland" wrote in message
...
Laurence Payne wrote:
On Wed, 9 May 2007 15:16:42 +0100, "Doki" wrote:

I've got an old Aiwa Reciever, probably dates back to the 70s or
early 80s - massive heavy aluminium front, needle tuner etc.
Anyway, it's got a rather strange connector on the back for the
antenna - 3 holes in a row marked "FM Aerial". Any ideas on what I
should be hooking up to it?

A FM aerial? :-)

I suppose it might be a combined 75 ohm/300 ohm connector. Try your
FM downlead into any pair of holes, see which work best! I suppose
it might be worth looking for a voltage on any of the holes first,
just in case it's some special arrangement for e.g. powering a
mast-head amplifier.

My guess is that the outer two are for a 300 ohm balanced downlead
with the centre pin being ground. If so, then either connect a
balanced lead to the outer two pins, or a coaxial cable to either
one (not both) and the centre pin. It would be as well to check for
volts as Lawrence has suggested.

What's one of them then?
What's one of what?

A 300 ohm balanced downlead.

This is a cable which has two parallel conductors spaced about 2 cm
apart. Unlike Coax, it doesn't have a screen. It is used mostly in
continental Europe. It has a characteristic impedance of 300ohms, and
having two identical connectors, is balanced, hence 300 ohm balanced
downlead.

It's not something you can buy easily in the UK, and indeed, coax is
preferable, as 300ohm cable is susceptible to interference.

I would use coax, and connect it to one outer terminal and a ground
point, typically the chassis of the receiver, or the centre pin of your
socket if that is ground connected.

Hope this helps

S.

--
http://audiopages.googlepages.com