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nuckolls.bob(at)aeroelect
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 Posted: Thu Jan 26, 2017 12:24 pm Post subject: iCom Antenna Switchbox effect on Com Radio |
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At 11:54 AM 1/26/2017, you wrote:
| Quote: | --> AeroElectric-List message posted by: Alec Myers <alec(at)alecmyers.com>
A transponder SWR meter would be great, but how are you going to get the output stage to transmit a carrier for long enough to measure anything with basic equipment? |
Excellent point . . . I should have amplified
my wish with the phrase "self excited".
Such a device is not so much an SWR meter as
it is an antenna analyzer . . . the next
step up in RF measurement.
I have an MFJ-259 that's getting rather
long in the tooth. Got mine back when they
were $170!
This critter, and it's relatives have built in
variable frequency excitation sources. Of
course, the ship's transponder would not be
a useful energy source for analyzing the
antenna's performance.
Bob . . .
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alec(at)alecmyers.com
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| Posted: Thu Jan 26, 2017 12:32 pm Post subject: iCom Antenna Switchbox effect on Com Radio |
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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.
On 26Jan2017, at 9:19 PM, Robert L. Nuckolls, III <nuckolls.bob(at)aeroelectric.com> wrote:
At 11:54 AM 1/26/2017, you wrote:
| Quote: |
A transponder SWR meter would be great, but how are you going to get the output stage to transmit a carrier for long enough to measure anything with basic equipment?
|
Excellent point . . . I should have amplified
my wish with the phrase "self excited".
Such a device is not so much an SWR meter as
it is an antenna analyzer . . . the next
step up in RF measurement.
I have an MFJ-259 that's getting rather
long in the tooth. Got mine back when they
were $170!
This critter, and it's relatives have built in
variable frequency excitation sources. Of
course, the ship's transponder would not be
a useful energy source for analyzing the
antenna's performance.
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 |
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n233ee(at)gmail.com
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| Posted: Thu Jan 26, 2017 1:36 pm Post subject: iCom Antenna Switchbox effect on Com Radio |
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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.
On Jan 26, 2017, at 14:19, Robert L. Nuckolls, III <nuckolls.bob(at)aeroelectric.com (nuckolls.bob(at)aeroelectric.com)> wrote:
| Quote: | At 11:54 AM 1/26/2017, you wrote:
| Quote: | --> AeroElectric-List message posted by: Alec Myers <alec(at)alecmyers.com (alec(at)alecmyers.com)>
A transponder SWR meter would be great, but how are you going to get the output stage to transmit a carrier for long enough to measure anything with basic equipment? |
Excellent point . . . I should have amplified
my wish with the phrase "self excited".
Such a device is not so much an SWR meter as
it is an antenna analyzer . . . the next
step up in RF measurement.
I have an MFJ-259 that's getting rather
long in the tooth. Got mine back when they
were $170!
This critter, and it's relatives have built in
variable frequency excitation sources. Of
course, the ship's transponder would not be
a useful energy source for analyzing the
antenna's performance.
Bob . . .
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