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Mobile Antenna with a Handheld (1 reply and 1 comment)

M7TJF
1 month ago
M7TJF 1 month ago

Hi everyone,

Was doing some range testing with both my Yaesu handheld on stock antenna and also via adaptor to one of these (on a mag mount in the centre of the car roof) on 144.700;

https://www.diamondantenna.net/pdfdocs/SG7500A%20&%20NMO%20Instructions.pdf

I was expecting the mobile antenna to work much better but it was terrible by comparison.

Is this normal or does it point towards a faulty antenna/connection somewhere? 

 

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Peter M0PWX (2E0PWX)
1 month ago

i would start with the adapter, check connections both sides are tight, if you have something like a nanoVNA check the antenna with that with the adapter inline

i assume the HH is a sma connector and the antenna PL239, if so i have had issues with a similar adapter on my baofeng (1 out of a pack of 4 was bad for me), if you have another adapter try it

M7TJF
1 month ago

I think it's either the adaptor or the connection on the radio (rx was on a Baofeng) - as I also tried a tactical whip on the Baofeng yesterday and that also had zero performance next to the stock antenna.

I also had the SG7500A working great connected into the back of my new RT-95 mobile unit and picked my little Yaesu FT-4XE up from 10 miles away through the Kent countryside.

Yaesu FT-4XE was just placed on the window sill of the 4th floor sending out some SSTV on demand via mic input from my laptop via VNC

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