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Vintage Pioneer tuner FM aerial socket 75Ω UNBAL

supersiv8

New member
Dec 27, 2015
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Does anyone know what type of connection this tuner has as 75Ω input?

http://i.ebayimg.com/00/s/MTA3MVgxNjAw/z/gCQAAOSw-0xYaojq/$_3.JPG

Tuner is a Pioneer TX-520L. I cannot find this information anywhere online...

I would like to connect a cable from the FM socket in the wall into the tuner to try to improve the reception.

(Am currently using the FM300Ω BAL connection but I'm hoping there is an aerial installed on the roof I could make use of through the wall socket.)

<img src=""http://i.ebayimg.com/00/s/MTA3MVgxNjAw/z/gCQAAOSw-0xYaojq/$_3.JPG"" width="700
px" alt="Back of Pioneer TX 520L">
 

Gray

Well-known member
Nov 27, 2015
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I haven't found a picture of the back.

Can you see it? Is it not a (male or female) Belling-Lee type connector?

How does it compare with your wall socket, for example?
 

jimmy1

New member
Nov 5, 2013
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I think its the same as the one on the back of a tele (if they still even have them)
 

supersiv8

New member
Dec 27, 2015
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The socket is slightly too small for a normal coaxial lead.

Does the link to the picture not work?
 

supersiv8

New member
Dec 27, 2015
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The socket is female but slightly too small for a normal coaxial lead.

Does the link to the picture not work?
 

abacus

Well-known member
Sep 24, 2008
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173
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Are you using an aerial lead with a plug at each end and not a pass through aerial lead that has a socket at one end? The socket in the picture looks like a standard aerial socket. (The outer ring also looks like it will expand)

Bill
 

Gray

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Nov 27, 2015
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supersiv8

New member
Dec 27, 2015
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I don't have a cable from before and haven't purchased one since I thought to check exactly what I need.

I have tried with this cable: https://www.ebay.com/itm/FM-75Ohm-UNBAL-Dipole-Indoor-Antenna-F-Type-Male-Connector-Y-Tuner-for-YAMAHA-/332339432688

And this does not fit, no matter if I press it really hard.

Surely it's a different type of socket...?
 

supersiv8

New member
Dec 27, 2015
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I tested with this one: https://www.ebay.com/itm/FM-75Ohm-UNBAL-Dipole-Indoor-Antenna-F-Type-Male-Connector-Y-Tuner-for-YAMAHA-/332339432688

Would not go in even though I pushed it with quite a bit of force... it really seems to be a different type of connection to me...
 

Gray

Well-known member
Nov 27, 2015
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It is just possible that the previous owner of the tuner clamped down the outer ring of the socket in order to make it grip his plug more, thereby making it too tight for you now.

The outside of your plug's body should fit inside the ring of the socket.

Here's what I would do:

First I'd get a medium sized flat-bladed screwdriver in the gap at the bottom of the ring and expand it.

If that didn't do the trick, with the tuner isolated from mains power, I'd take off the hardboard back panel and remove the socket (by removing the 2 black screws either side of it) then fit one of these chassis sockets:

http://cpc.farnell.com/pro-signal/psg01950/tv-coax-socket-chassis/dp/AV15498

(If it didn't fit in the plastic hole where the old one was, you could make a hole for it in the hardboard)

Or, as an alternative, take the plug-to-plug lead, bare one end and solder it directly onto the circuit board.

(If you can get it to South East Essex, l'll do it for you)
 

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