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Posted

Microavionics MM050 Metal Whip Antenna

can anyone tell me if i can cut and join this antenna lead without losing performance or causing some other issue.

Posted

Yes, providing you can make a reliable new connection with a 50 Ohm connector , the coax length on these bought antenna isnt tuned in any way its just sold with a usable length

but lengthening it a lot will  reduce the signal/noise ratio a bit

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Posted
23 minutes ago, Underwood said:

Yes, providing you can make a reliable new connection with a 50 Ohm connector , the coax length on these bought antenna isnt tuned in any way its just sold with a usable length

but lengthening it a lot will  reduce the signal/noise ratio a bit

Thank you. 

I don't want to lengthen it. Just want to cut and join to the old lead because it is a pain to remove from the AC.

Posted

I always replace the whole coax length even if the work takes significant time.

 

20 years of corrossion but leaving the last 10% does not make a lot of sense to me.

 

 

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Posted
5 hours ago, BurnieM said:

I always replace the whole coax length even if the work takes significant time.

 

20 years of corrossion but leaving the last 10% does not make a lot of sense to me.

 

 

I agree with you - don't skimp, replace the lot.

 

However if you insisted on cutting & splicing/joining;

  • Cut  so as to have about 20 mm extra length
  • Slid a suitable piece of shrink tube onto one end
  • (Both cut ends)
  • Peel back the insulation & remove
  • Peel back the wire shielding & retain
  • Strip the insulation of the inner wire
  • Twist the inner wires together, to make a neat mechanical join (solder if available) OR join with small tubular crimp joiner
  • Tape to insulate
  • Restore wire shielding as best as you can - wrap with aluminium foil, to make good shielding
  • Slip heat shrink over join and shrink in place

Job done!😈

 

 

 

 

Posted

Wouldn't it be simpler to put a male end onto one piece,  then a female end onto the other. .

The  joining parts are readily available from ' Jaycar ' or your nearest amateur radio group .

spacesailor

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Posted
16 minutes ago, spacesailor said:

Wouldn't it be simpler to put a male end onto one piece,  then a female end onto the other. .

The  joining parts are readily available from ' Jaycar ' or your nearest amateur radio group .

spacesailor

Yes , a 50 ohm connector as advised by underwood. It's not very old so corrosion is not a problem. I leaned on the antenna by mistake when I was fitting aileron cables and it snapped off. 

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