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iCom Antenna Switchbox effect on Com Radio

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nuckolls.bob(at)aeroelect
Guest

Posted: Wed Jan 25, 2017 10:17 am Post subject: iCom Antenna Switchbox effect on Com Radio

At 11:37 AM 1/25/2017, you wrote:

  	  Quote: 	
		   Bob,



 Thanks for discussing this subject.

 I'm having trouble with my SL30 not receiving and transmitting and had assumed the problem to be with the radio.  After your discussion I remembered I wired in one of the iCom boxes and it well could be the problem. 	


 It certainly warrants investigation. Do

 you have a BNC barrel adapter . . . or perhaps

 a BNC-Tee? You can pull the coaxes off the

 back of the Icom-Box and bypass it with

 the connectors.



 Let us know what you discover.



 An SWR check at the radio end of the feed

 line would be equally useful. These things

 are coming down in price . . . and this offering

 even ships from US.



  http://tinyurl.com/j7muztq



 You'll need a pair of BNC(F)->N(M) adapters



  http://tinyurl.com/h3666vz



 



 

 

   Bob . . .

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hlbartel(at)pld.com
Guest

Posted: Wed Jan 25, 2017 11:20 am Post subject: iCom Antenna Switchbox effect on Com Radio

Bob,

 

I need an education.  The SWR meter referenced here shows;     Frequency Range: HF 1.6MHZ~60MHZ.  How important are the range markings?

 

 

Thanks,

Harry

 

From: owner-aeroelectric-list-server(at)matronics.com [mailto:owner-aeroelectric-list-server(at)matronics.com] On Behalf Of Robert L. Nuckolls, III

Sent: Wednesday, January 25, 2017 12:12 PM

To: aeroelectric-list(at)matronics.com

Subject: Re: Re: iCom Antenna Switchbox effect on Com Radio

 

At 11:37 AM 1/25/2017, you wrote:

Bob,



Thanks for discussing this subject.

I'm having trouble with my SL30 not receiving and transmitting and had assumed the problem to be with the radio.  After your discussion I remembered I wired in one of the iCom boxes and it well could be the problem.



It certainly warrants investigation. Do

you have a BNC barrel adapter . . . or perhaps

a BNC-Tee? You can pull the coaxes off the

back of the Icom-Box and bypass it with

the connectors.



Let us know what you discover.



An SWR check at the radio end of the feed

line would be equally useful. These things

are coming down in price . . . and this offering

even ships from US.



http://tinyurl.com/j7muztq



You'll need a pair of BNC(F)->N(M) adapters



http://tinyurl.com/h3666vz

  Bob . . .

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

nuckolls.bob(at)aeroelect
Guest

Posted: Wed Jan 25, 2017 5:21 pm Post subject: iCom Antenna Switchbox effect on Com Radio

At 11:37 AM 1/25/2017, you wrote:

  	  Quote: 	
		   Bob,



 Thanks for discussing this subject.

 I'm having trouble with my SL30 not receiving and transmitting and had assumed the problem to be with the radio.  After your discussion I remembered I wired in one of the iCom boxes and it well could be the problem. 	


 It certainly warrants investigation. Do

 you have a BNC barrel adapter . . . or perhaps

 a BNC-Tee? You can pull the coaxes off the

 back of the Icom-Box and bypass it with

 the connectors.



 Let us know what you discover.



 An SWR check at the radio end of the feed

 line would be equally useful. These things

 are coming down in price . . . and this offering

 even ships from US.



  http://tinyurl.com/j7muztq



 You'll need a pair of BNC(F)->N(M) adapters



  http://tinyurl.com/h3666vz



 



 

 

   Bob . . .

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

alec(at)alecmyers.com
Guest

Posted: Thu Jan 26, 2017 5:06 am Post subject: iCom Antenna Switchbox effect on Com Radio

Is there any significant benefit of a digital meter over an analogue one? Ive never trusted the fake precision of cheap digital meters.



On Jan 25, 2017, at 14:41, Robert L. Nuckolls, III <nuckolls.bob(at)aeroelectric.com (nuckolls.bob(at)aeroelectric.com)> wrote:

  At 11:37 AM 1/25/2017, you wrote:

  	  Quote: 	
		   Bob,



 Thanks for discussing this subject.

 I'm having trouble with my SL30 not receiving and transmitting and had assumed the problem to be with the radio.  After your discussion I remembered I wired in one of the iCom boxes and it well could be the problem. 	


 It certainly warrants investigation. Do

 you have a BNC barrel adapter . . . or perhaps

 a BNC-Tee? You can pull the coaxes off the

 back of the Icom-Box and bypass it with

 the connectors.



 Let us know what you discover.



 An SWR check at the radio end of the feed

 line would be equally useful. These things

 are coming down in price . . . and this offering

 even ships from US.



  http://tinyurl.com/j7muztq



 You'll need a pair of BNC(F)->N(M) adapters



  http://tinyurl.com/h3666vz



 



 

 

   Bob . . .

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

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nuckolls.bob(at)aeroelect
Guest

Posted: Thu Jan 26, 2017 12:07 pm Post subject: iCom Antenna Switchbox effect on Com Radio

 	  Quote: 	
		   But this unit always did show 1.02 when trying to calibrate with 1W and even with other power settings he never did see a VSWR which was to expect and tells the unit is useless for measuring VSWR. 	


  I'm surprised at this . . . I'm wondering if

  the device under test was broke.  I'm ensnarled

  in some house-projects right now . . . I'll

  dig out my red-dot and run the same tests

  on it in the next day or so.



 

  	  Quote: 	
		  So I probably should go better with a standard box like DAIWA CN-102 L? 	


  Without digging into the internals and/or

  doing bench testing, I can offer no

  additional insight.  The red-dot series

  has been out there for several years.

  I searched a bit for technical reviews but

  couldn't come up with anything in the time

  I had to look.



  If anyone out there can find a published

  narrative on a technical bench test of the

  red-dot (or any similar instrument) it would

  be a useful addition to the archives.



 

   Bob . . .

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nuckolls.bob(at)aeroelect
Guest

Posted: Fri Jan 27, 2017 9:50 am Post subject: iCom Antenna Switchbox effect on Com Radio

At 03:59 PM 1/26/2017, you wrote:



  	  Quote: 	
		   I would imagine the MFJ-259 would be of limited application when testing at the transponder frequency, given it's normal application doesn't extend above VHF? I have the later MFJ-269, that does reach up into the lower part of UHF but only gives SWR results at that frequency. 	


   Correct . . . I mentioned the MFJ259 as an

   EXAMPLE of self excited network analyzer (read

   SWR meter). At the same time, I was agreeing with

   the comment that while the bare-foot VHF/UHF

   analyzers can use the host comm transceiver as

   a constant excitation source, a transponder offers

   no such capability.



 

 

   Bob . . .

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

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