Shortwave antenna question

[tilt404]

Hello,

I have a Par Electronics End Fedz Shortwave antenna that I used before on a Icom R75, but now I'm just using a Sony ICF-SW7600GR portable shortwave radio that has a headphone type of external antenna input. So my question is to find if its possible to buy any sort of adapter for the PL239 connector from the End Fedz to let it connect to the Sony?

Even any info on if this can be done through DIY effort would be helpful. Just not sure what parts would work best. It would be nice to be able to use that End Fedz again and put it outside. It worked well with my Icom R75 and I know the Sony isn't on the same level playing field as the Icom. The Sony came with a wind up wire antenna but I would like to save that for portable use, and keep the End Fedz at home permanently set up outside where I had it before.

 

[n9mxq]

Be easy enough to build your own..

Get a PL-259 and solder a wire into the center. That would go to the tip of the headphone connector.. another wire between ground (body of the PL-259 and the barrel of the headphone...

Barrel adapter between the antenna PL-259 and the adapter.

 

[SpectreOZ]

Pl259-to-3.5mm plug adapters are made by Calrad Electronics and are available from KRP Electronics's online store found HERE

Hope that helps...

 

[ka3jjz]

Or get one from Universal Radio...

S0239 PL259 Adapters

Fascinating find, nonetheless, Oz, I never thought they'd make an adapter like this...Mike

 

[RadioDaze]

Keep in mind that that is "a lot of antenna" for a portable radio. Some overload is possible. Be prepared to use the attenuator as needed.

 

[radiokatz]

I've been thinking of doing this very same thing - putting up a miulti-band dipole for my Grundig G6.

RadioDaze, what type of attenuator? The one in the radio or one inline with the antenna? Build your own or buy? I'm not real clear on this.

Thanks for any info you can give.

 

[RadioDaze]

Just start with the one on the side of the radio and see how it goes. It's adjustable, so it might do the trick at some setting.

 

[ka3jjz]

If you are on the East Coast chances are that you will overload the radio with a multi band dipole (signal levels tend to be higher here, on average). And depending on band conditions, even the attenuator might not be able to get it all down.

Mike

 

[SpectreOZ]

Fascinating find, nonetheless, Oz, I never thought they'd make an adapter like this...Mike

Thanks, they seem to make adapters for all sorts of RF connectors these days it was simply the result of a random search using my Google-Fu

I daresay it would be cheaper for us without access to the CONUS market to simply make one as the ones on Flea-bay are quite a bit more again...

 

[Boombox]

If your antenna happens to overload your radio, you can always indirectly couple the radio to the antenna, by running a wire from the feedline somewhere next to your Sony; placing the whip antenna of the radio near the feedline, or wrapping a turn or two of a wire feedline around the radio (I don't think this would work with coax, though).

I think it's called proximity effect. I used this method to connect a 100 ft wire to my DX370 and Panasonic portables a few years ago when I had local electrical QRM issues.

Placing the whip antennas of the radios near the antenna feedline boosted the signals, but somehow reduced the electrical buzz (probably because the signals were reduced -- including the QRM). By moving the whips closer or farther away from the bare feedline it was like operating an RF gain.

I didn't experience overload on my 370, and was able to hear a lot of SW stations using that method.