---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Fri 01/27/17: 5 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 09:46 AM - Re: Re: iCom Antenna Switchbox effect on Com Radio (Robert L. Nuckolls, III) 2. 09:50 AM - Re: Re: iCom Antenna Switchbox effect on Com Radio (Robert L. Nuckolls, III) 3. 10:03 AM - Re: Re: iCom Antenna Switchbox effect on Com Radio (don van santen) 4. 10:09 AM - Re: Re: iCom Antenna Switchbox effect on Com Radio (Robert L. Nuckolls, III) 5. 12:27 PM - Earth-X bench battery (Robert L. Nuckolls, III) ________________________________ Message 1 _____________________________________ Time: 09:46:10 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Re: iCom Antenna Switchbox effect on Com Radio At 03:32 PM 1/26/2017, you wrote: >Some time ago when the MFJ-259 was mentioned in a post, I was >wishing you had made a 'comic book' about it's proper use associated >with aircraft testing. You were otherwise occupied at the time but >thought it was a good idea to put on your to-do list. I would still >appreciate your guidance since the included manual mentions several >things NOT to do. Knowing how to do nondestructive testing would >help. Thanks. Good idea . . . I'll put it in the 'bucket' of topics. Bob . . . ________________________________ Message 2 _____________________________________ Time: 09:50:18 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Re: iCom Antenna Switchbox effect on Com Radio At 03:59 PM 1/26/2017, you wrote: >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 . . . ________________________________ Message 3 _____________________________________ Time: 10:03:42 AM PST US From: don van santen Subject: Re: AeroElectric-List: Re: iCom Antenna Switchbox effect on Com Radio Please include nav antennas if possible. Thanks On Jan 27, 2017 09:52, "Robert L. Nuckolls, III" < nuckolls.bob@aeroelectric.com> wrote: > At 03:32 PM 1/26/2017, you wrote: > > Some time ago when the MFJ-259 was mentioned in a post, I was wishing you > had made a 'comic book' about it's proper use associated with aircraft > testing. You were otherwise occupied at the time but thought it was a good > idea to put on your to-do list. I would still appreciate your guidance > since the included manual mentions several things NOT to do. Knowing how > to do nondestructive testing would help. Thanks. > > > Good idea . . . > > I'll put it in the 'bucket' of topics. > > > Bob . . . > ________________________________ Message 4 _____________________________________ Time: 10:09:54 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Re: iCom Antenna Switchbox effect on Com Radio At 02:27 PM 1/26/2017, you wrote: > >I bought a lovely Agilent 8664A 100Mhz-3GHz signal generator on eBay >a while back for about $800 - that would do the trick. Unfortunately >it weighs 50lbs and getting down the stairs from the attic and out >to the airport ramp would just about kill me. Yeah, I own one of the 'cousins' Emacs! Got it off eBay about 12 years ago . . . it's still working. I'm considering adding an external, GPS disciplined reference oscillator. Those are available now for under $200. Not that it will add much . . . last time I checked it against WWV it was still within 2 ppm after a 2 hour warm up. But with the commercial two-way tolerances getting ever tighter, being able to improve accuracy by several orders of magnitude could be handy. I'm amazed at how good many of the jelly-bean transceivers out of China are. I've helped my fellow EMT crew acquire low cost (read disposable) monitor radios. Out of 7 or 8 radios purchased so far, only one was more than 300 Hz off frequency at 453 Mhz. Bob . . . ________________________________ Message 5 _____________________________________ Time: 12:27:27 PM PST US From: "Robert L. Nuckolls, III" Subject: AeroElectric-List: Earth-X bench battery About a year ago, Earht-X provided me a sample ETX36 li-ion battery for evaluation. Over that time I've had it installed in a couple of system emulations . . . I've also cranked a few cars with it. Cap-Checking batteries and evaluating performance of various battery maintenance tools can be about as exciting as watching paint dry . . . so I keep a rudimentary set of battery-tools on a table in my office. Just for grins, I decided to cap-check the sample ETX36. I've conducted a couple of charge/discharge cycles on the battery . . . want to do a couple more yet. I'll share results when all the data is gathered. A couple of recharge cycles were conducted with a Battery Tender 'wall wart' maintainer . . . a tool that's been in my stable for at least 10 years. After each B-T recharge, the cap-check said the test article was good for about 10.5 Ah. As I recall, tests on the as-received sample produced 11.5 Ah cap-checks. Here's the recharge plot on a Battery Tender. Emacs! 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