Technical, Techniques, Hints, and Tips > Radio Equipment

Mini Screened Aerial connection

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HS93 (RIP):
Is there a reason why you want a screened aerial plug as reciver ant are not screened ? have you seen the type that hunter sell gold plated single pin,,you may find the type you need below

Peter

http://www.connectorco.co.uk/catalogue/coaxial.htm

MMCX FEMALE CRIMP

BarryM:
Thanks for your help and I'm sure I can find something among the suggestions.

As for why I was looking for a screened plug, I can only refer to the original MM article noted above of which I quote an extract:-

"The routing of the aerial is important and at times difficult to keep clear of motor feed cables.One solution is to route it into the superstructure using part of the funnel/mast assembly as part of the aerial system. To do this you need to terminate the aerial close to the Rx and substitute a plug and socket connection for parting the superstructure and hull. Thi is OK but what is not generally appreciated is the any old plug and socket will not do when dealing with radio frequencies if you are to maintain maximum efficiency of the receiving system. If, for instance, you use a 4mm banana plug plug and socket there will be significant signal loss at that point. Far better to use a connector designed for RF connections."

Bet that sparks off another argument!   :)

Thanks again

Barry M

HS93 (RIP):
I don't know who the article was by but he does not know about RF ,as you are not using screened cable an RF plug is of no use.a simple Gold plated plug and socket will do .most RF plugs are just cheep plated unless you use GREENPAR. witch are silver plated but tarnish. you could simple coil your antenna wire away from motors esc and fit a gold plated simple plug.and then attach yourextra wire. the de tuning will be neglegable,Just do a range test,it also should not  effect the sensitivity of the receiver .

Peter

G0PAH

Doc:
If you were talking about a transmitting antenna/aerial then a coaxial type plug/jack would certainly make sense.  But for a receiving antenna/aerial, don't bother.  As long as the plug/jack thingy makes fairly good mechanical and electrical connection, it ought to work just fine.  Since most boats are not made of metal, a simple hole through the non-metalic structure, filled with the conductor and glue (for sealing/mechanical strength) also works just fine.  Got some metal foil?  Glue it on the mast, paint over it, at the bottom end make connection to the antenna/aerial.  (Have I tried it?  Not lately, ran out of the @#$ foil.)  You guys still have any of the metal tape that used to be used in putting burglar alarm thingys on windows?  Paint with lots of metal content can work too.  Sort of difficult to solder too, but...
 - 'Doc

BarryM:
One upon a time you could buy metallic paint to repair stick-on rear heated windows for cars. (I think I've still got some!)  Liquid aerial?

Barry M

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