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Author Topic: Differences Between Factory Antennas  (Read 3634 times)
AE7NM
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Posts: 1




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« on: September 07, 2017, 10:04:35 PM »

I have several Alinco HTs. I use aftermarket antennas with them. My problem is that I put all of the factory antennas in a box, and now I can't tell which one goes with which radio. This is a problem because I have a DJ-G29 (dual band 222MHz and 902MHz), DJ-G7 (tri band 2 m, 73 cm, 1.2 GHz) and some regular VHF/UHF dual bands like the DJ-V57. I think I can figure out the regular dual band antennas. Can anyone help?
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WZ7U
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Posts: 573




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« Reply #1 on: September 07, 2017, 10:42:19 PM »

Well, this is a novel problem.  Huh

Aside from the obviously needed marking scheme, like perhaps different colored paint pens/fingernail polish/whatever dots on the radio and antenna for reference, do you have the ability to make up the appropriately terminated connectors to make a test patch cord to a suitable swr meter? Perhaps that way you could determine resonance vs radios. Otherwise, you may be having to test each possibility against an outside receiver for relative signal strength; the stronger the signal strength theoretically the properly matched antenna.

Also, it's remotely possible you could look up your affected radios at RigPix and perhaps identify the proper antenna visually. Here at http://www.rigpix.com/

I really don't have much more than the pedestrian response to your query and I am sorry for that. Hopefully someone else has a more definitive response. Good luck!

Oh, love the RC car you're sporting there on your zed bio. I hope to work you /M someday soon. 73, eric
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WZ7U ~ originating from CN86jc +/-

Yet another imperfect being created by THE perfect God. Thank you Jesus!
KC8KTN
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Posts: 1382


WWW

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« Reply #2 on: September 08, 2017, 07:33:23 AM »

Wow i was just thinking about this two days ago...I put a label on antenna,s  from which  radio it came from and instructions on how to attach it.. Hope  this helps. Have a Joyous Day. Be Safe.Trying to make ham radio a sharing and caring hobby.73zzzz
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KB2WIG
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Posts: 358




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« Reply #3 on: September 08, 2017, 08:20:23 AM »



What does Alinco say?


http://www.alinco.com/parts/

klc
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KC4ZGP
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Posts: 1637




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« Reply #4 on: September 12, 2017, 06:51:54 PM »


You have too many radios man. One is all you need.

Why did you switch antennas?

I own an Alinco SR-8T. Top of line rig I say. It's the model for other transceivers. Did you
know Alinco devised single sideband? You didn't know that did you?

Kraus
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WZ7U
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Posts: 573




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« Reply #5 on: September 12, 2017, 07:28:37 PM »


 Did you know Alinco devised single sideband? You didn't know that did you?

Kraus

Wait, what?
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WZ7U ~ originating from CN86jc +/-

Yet another imperfect being created by THE perfect God. Thank you Jesus!
KC4ZGP
Member

Posts: 1637




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« Reply #6 on: September 13, 2017, 09:56:26 AM »


Herr ZU,

Yup.

You don't know your distorted history very well do you?

Kraus
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W3WN
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Posts: 754




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« Reply #7 on: September 13, 2017, 12:42:14 PM »

< snip >
Did you know Alinco devised single sideband? You didn't know that did you?

Kraus
Alinco was founded by John Renshaw Carson?  Who knew?

( For those who don't know, he patented the concept of SSB in 1923.  See:  https://en.wikipedia.org/wiki/John_Renshaw_Carson )
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N9AOP
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Posts: 641




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« Reply #8 on: September 13, 2017, 12:49:48 PM »

Just be glad you don't have to figure out which day of the week each antenna was made.  Monday antennas usually fare better than the Friday ones.
Art
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N0MKC
Member

Posts: 83




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« Reply #9 on: September 13, 2017, 02:29:26 PM »

How about putting each one on an antenna analyzer to see where it is resonant or shows a low SWR?

Granted, with "rubber ducky" antennas (which often are little better than a leaky flexible dummy load) you may find some which are universally inefficient across a wide frequency range...
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WZ7U
Member

Posts: 573




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« Reply #10 on: September 13, 2017, 08:12:27 PM »


Herr ZU,

Yup.

You don't know your distorted history very well do you?

Kraus

Nope, I didn't know that. Fascinating. Thanks for causing me to learn something today, even if I was trying so hard not to.

Oh, it's Mr 7U to you  Grin Wink
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================================================
WZ7U ~ originating from CN86jc +/-

Yet another imperfect being created by THE perfect God. Thank you Jesus!
KC4ZGP
Member

Posts: 1637




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« Reply #11 on: September 14, 2017, 12:03:41 PM »


Ooops!

I best some glasses for these glasses Mr. 7U.

W3WN,

Really!? I was just joking. No I wasn't. I knew that.

Kraus. Please go home.



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W3WN
Member

Posts: 754




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« Reply #12 on: September 14, 2017, 12:33:36 PM »


Ooops!

I best some glasses for these glasses Mr. 7U.

W3WN,

Really!? I was just joking. No I wasn't. I knew that.

Kraus. Please go home.
Sorry, the correct answer to "Who knew?" is "Who is on First!" 
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KC4ZGP
Member

Posts: 1637




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« Reply #13 on: September 14, 2017, 01:18:54 PM »


And on payday Who's wife get the check?

Yes.

I just learned something about ufer ground via concrete. Neat.

Kraus

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K9MHZ
Member

Posts: 1439




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« Reply #14 on: September 15, 2017, 05:13:23 AM »

Granted, with "rubber ducky" antennas (which often are little better than a leaky flexible dummy load) you may find some which are universally inefficient across a wide frequency range...

NM.... I had that HT at one time, as well as their 2m/440 HT.  The supplied flexible antennas were indistinguishable, so much so that I thought they were the same.  Put both on a spectrum analyzer with TG, and got results that showed they didn't do much of anything well, anywhere.  Bought a nice 2m/440 dual band from AES (longer, definitely purpose-built I think by Diamond or Larsen).  For 33cm I bought a commercial biz band radio end-fed half wave, or maybe even vertical dipole (can't remember).  Both produced much, much better results, but did require SMA to BNC adapters.  I think on the radio end, the adapters that I found that worked the best were actually from Wouxun (AES store).

Anyway the point is, I think those supplied HT antennas are like trying to distinguish crap from garbage, and might even be the same generic antenna.

Good luck.
  
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