Today's Message Index:
----------------------
1. 06:30 AM - Re: APRS / ATRS (Dj Merrill)
2. 06:59 AM - Re: APRS / ATRS (Sean Stephens)
3. 08:32 AM - Re: Cross talk problem (jonlaury)
4. 11:28 AM - APRS / ATRS (Paul Millner)
5. 01:28 PM - King KR-86 Loop Cable (Hopperdhh@aol.com)
6. 03:55 PM - Red Dot Digital SWR Meter (Robert Borger)
7. 04:44 PM - Re: King KR-86 Loop Cable (Robert L. Nuckolls, III)
8. 05:20 PM - Re: Red Dot Digital SWR Meter (Robert L. Nuckolls, III)
9. 06:17 PM - Re: Red Dot Digital SWR Meter (Robert Borger)
10. 09:20 PM - For Sale: Two Cheltons, EI MVP-50, Pinpoint ADAHRS and Spare Smart Data Cards (Michael McMahon)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
On 02/07/2012 11:36 PM, Don wrote:
>
> APRS is only available to ham operators and uses a two meter packet radio.
> No text. No wifi.
Actually, you can send and receive text messages with APRS. In You'd
need to have the appropriate transmitter, receiver, display, and
keyboard in the plane to do so, but it is certainly possible.
-Dj
--
Dj Merrill - N1JOV
Sportsman 2+2 Builder #7118 N421DJ - http://deej.net/sportsman/
Glastar Flyer N866RH - http://deej.net/glastar/
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
On 2/7/12 11:28 PM, Daniel Hooper wrote:
> --> AeroElectric-List message posted by: Daniel Hooper<enginerdy@gmail.com>
>
> I think I read about someone experimenting with a MicroTrak4 in their airplane...
> http://www.byonics.com/mt-tt4
From a while ago, but great info...
http://home.hiwaay.net/~sbuc/journal/tracker.htm
Also, here's info on setting up your own APRS iGate...
http://www.vansairforce.com/community/showthread.php?t=30180
-Sean
Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Cross talk problem |
> I meant where the speaker line joins the light power wiring at the panel.
OK, I think I get the idea. The two cables are not co-located at the power end
(one comes out of the audio panel, one comes from the battery bus) so I'll try
putting a ferrite on the speaker cable at the point of convergence. I gather
that this is not an exact science, so I'll try the different locations that you
suggest.
Haven't had a chance to try with the com radio off. But the problem goes away
with the audio panel off, or (IIRC) with the speaker button deselected with the
AP on.
Right now I'm focused on getting my W&B done and anything else for my DAR appointment.
Thanks
John
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=365879#365879
Message 4
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
Hi Don,
I'm a ham; note that APRS began as a general text service. The geo
updating's become the killer app, but hardly the only... some folks use
it for remote weather stations, other things.
So it certainly supports text messages... I'm just looking for a low
barrier of entry approach to doing so airborne. Thanks for your
thought, incorrect though it may be! :-)
Paul
On 2/7/2012 8:36 PM, Don wrote:
> --> AeroElectric-List message posted by: "Don"<dsvs@ca.rr.com>
>
> APRS is only available to ham operators and uses a two meter packet radio.
> No text. No wifi.
>
Message 5
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | King KR-86 Loop Cable |
I have a KR-86 ADF receiver and KA42 loop antenna, but no cable. I'd like
to fabricate a cable.
Apparently the capacitance of the cable is critical. Can anyone tell me
what this capacitance should be and how to measure it? Also, is the cable 2
separately shielded twisted pairs, or can the twisted pairs both be in the
same shield, like telephone cable?
Thanks, Dan K9WEK
RV-7A 766DH flying since 2001
Message 6
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Red Dot Digital SWR Meter |
Bob,
The Red Dot Digital SWR Meter that I ordered last week has arrived from China.
Here's a picture of the front:
It appears very well built with a steel(?) case.
Here's a picture of the back:
Now for the best part. Here's a scan of the instructions, front and back:
Do we have a Chinese translator in the house?
It appears that it takes 3 AAA batteries. I'll have to remove the back and confirm
that it looks like the picture and put some batteries in it.
I think I'll wait until you have had the opportunity to test the one you have on
order before I go any further than that.
Blue skies & tailwinds,
Bob Borger
Europa XS Tri, Rotax 914, Airmaster C/S Prop.
Little Toot Sport Biplane, Lycoming Thunderbolt AEIO-320 EXP
3705 Lynchburg Dr.
Corinth, TX 76208-5331
Cel: 817-992-1117
rlborger@mac.com
Message 7
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: King KR-86 Loop Cable |
At 03:15 PM 2/8/2012, you wrote:
>
>I have a KR-86 ADF receiver and KA42 loop antenna, but no
>cable. I'd like to fabricate a cable.
>
>Apparently the capacitance of the cable is critical. Can anyone
>tell me what this capacitance should be and how to measure
>it? Also, is the cable 2 separately shielded twisted pairs, or can
>the twisted pairs both be in the same shield, like telephone cable?
Not sure without schematics and a service
manual. There have been numerous service bulletins
over the years that called for confirmation
of a sense or loop cable assembly's capacitance.
For many radios of the era, coax capacitance
was an integral component of resonant or reactive
circuits within the receiver.
I recall writing accessory kits for ADF installations
wherein the installer fabricated a sense antenna
coax from some weird coax with a very tiny center
conductor in a relatively large hollow insulator
sleeve. Car radios used to use the same stuff . . .
very LOW capacitance/foot was key. Here's a tid-bit
I found on the 'net about low cap receiving coax:
The real reason car radios used ~90 ohm coax is 90-95 ohms works out
to be the very highest impedance practical in a coaxial line having
minimum possible shunt capacitance and reasonable outer and workable
conductor size. This is entirely because of the short unloaded whip
antenna on the car, and the AM broadcast bands low frequency that
makes the antenna the tiniest fraction of a wave tall. The small car
antenna is a voltage probe on AM broadcast. The short car antenna is
an extremely high impedance source on the AM band. The AM receiver
has a very high input impedance, ideally hundreds or thousands of
ohms. Any shunt capacitance to ground in the connection between the
receiver and antenna forms the lower leg of a voltage divider that
reduces the RF voltage available at the AM radio input.
The car system is not operating in a normal transmission line mode.
This type of cable was also used for some old data lines, and it can
work as a transmission line, but generally it is pretty lossy
compared to other cables. After all, nearly all HF and VHF loss is
caused by conductor resistance and this cable has a pretty thin
center conductor.
As the article states, coax used in this application
is not behaving like a matched transmission line but
simply a shielded wire chosen to minimize the upset
for very high impedance receiver front ends.
RG62 is the only modern coax I can find with a low
capacitance (13.0 pf/ft). You could probably make
a new cable from this stuff if you knew what the total
allowable capacitance was . . . this sets cable
length.
These folks offer cables for KR-76 in various
lengths. Perhaps they fabricate them locally.
http://www.bennettavionics.com/kr86system.html
Bob . . .
Message 8
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Red Dot Digital SWR Meter |
At 05:43 PM 2/8/2012, you wrote:
>Bob,
>
>The Red Dot Digital SWR Meter that I ordered last week has arrived from China.
>Here's a picture of the front:
>
>It appears very well built with a steel(?) case.
>
>Here's a picture of the back:
>
>Now for the best part. Here's a scan of the instructions, front and back:
I think mine is here too. Need to get to the PO Box in
the morning. I've looked for an English instruction
manual but nothing turned up in the time I had.
I did find this narrative by a user:
Specifications:
MAX.POWER 120W
V.S.W.R 1.00~19.9
FREQUENCY RANGE VHF(145mhz) / UHF(45mhz)
COVER:100mhz~500mhz
ONSERTION LOSS < 0.15dB(VHF) , < 0.25dB(UHF)
TEMPERATURE 0?~70?
BATTERY
3 x AAA Type Battery or Rechargeable <2mA
(battery not included in this sale)
SZIE 66*68*37 (mm)
INTERFACE N(SL16)
WEIGHT 260g (without battery)
Instructions:
Battery installation: Remove 4 black round screws on the corner of
back cover and open it. Install 3 AAA batteries. BE CAUTIOUS to the
polarities. Put the cover on and fasten the screws. IMPROPER
INSTALLATION OF BACK COVER WILL CAUSE ERROR ON U-BAND MEASUREMENT!
Connect the Output of your transceiver to "TX" and Antenna or Load to
"ANT". NOTE: UV-Band meter utilize "N" type connectors; and"SL16"
connectors (normally named "M" connecter) for HF-Band. Proper
adaptor/cable is required if your device has different type of connectors.
Press the red button to power on. After 2 seconds of LCD self test,
it's ready for normal measurement.
UV-Band meter will display in sequence:"+ XXX P" (pass through
power),"- XXX P" (feed back power)," XXX G" (SWR value), 2 seconds
display for each mode. Press the red button will hold the current
display. Press it again to continue the display.
Under the environment of night or weak illumination, just press and
hold the red button for 1 second to turn the blue back light on.
Press and hold the red button for 1 second again to turn it off.
8 minutes after no power was measured, it will power off
automatically. Press and hold the red button for 2 seconds to turn
off manually.
Bob . . .
Message 9
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Red Dot Digital SWR Meter |
Bob,
Thanks for the quick reply. One last question. After you power up the SWR Meter,
do you transmit on the radio to get the readings or does it magically throw
electrons about to get the readings?
I'll take it to the hanger tomorrow and, with any luck, I'll be able to give it
a test.
Blue skies & tailwinds,
Bob Borger
Europa XS Tri, Rotax 914, Airmaster C/S Prop.
Little Toot Sport Biplane, Lycoming Thunderbolt AEIO-320 EXP
3705 Lynchburg Dr.
Corinth, TX 76208-5331
Cel: 817-992-1117
rlborger@mac.com
On Feb 8, 2012, at 7:07 PM, Robert L. Nuckolls, III wrote:
>
> At 05:43 PM 2/8/2012, you wrote:
>> Bob,
>>
>> The Red Dot Digital SWR Meter that I ordered last week has arrived from China.
>> Here's a picture of the front:
>>
>> It appears very well built with a steel(?) case.
>>
>> Here's a picture of the back:
>>
>> Now for the best part. Here's a scan of the instructions, front and back:
>
>
> I think mine is here too. Need to get to the PO Box in
> the morning. I've looked for an English instruction
> manual but nothing turned up in the time I had.
>
> I did find this narrative by a user:
>
> Specifications:
>
> MAX.POWER 120W
> V.S.W.R 1.00~19.9
> FREQUENCY RANGE VHF(145mhz) / UHF(45mhz)
> COVER:100mhz~500mhz
> ONSERTION LOSS < 0.15dB(VHF) , < 0.25dB(UHF)
> TEMPERATURE 0?~70?
> BATTERY
> 3 x AAA Type Battery or Rechargeable <2mA
>
> (battery not included in this sale)
>
> SZIE 66*68*37 (mm)
> INTERFACE N(SL16)
> WEIGHT 260g (without battery)
> Instructions:
>
> Battery installation: Remove 4 black round screws on the corner of back cover
and open it. Install 3 AAA batteries. BE CAUTIOUS to the polarities. Put the
cover on and fasten the screws. IMPROPER INSTALLATION OF BACK COVER WILL CAUSE
ERROR ON U-BAND MEASUREMENT!
>
> Connect the Output of your transceiver to "TX" and Antenna or Load to "ANT".
NOTE: UV-Band meter utilize "N" type connectors; and"SL16" connectors (normally
named "M" connecter) for HF-Band. Proper adaptor/cable is required if your device
has different type of connectors.
>
> Press the red button to power on. After 2 seconds of LCD self test, it's ready
for normal measurement.
>
> UV-Band meter will display in sequence:"+ XXX P" (pass through power),"- XXX
P" (feed back power)," XXX G" (SWR value), 2 seconds display for each mode. Press
the red button will hold the current display. Press it again to continue the
display.
>
> Under the environment of night or weak illumination, just press and hold the
red button for 1 second to turn the blue back light on. Press and hold the red
button for 1 second again to turn it off.
>
> 8 minutes after no power was measured, it will power off automatically. Press
and hold the red button for 2 seconds to turn off manually.
>
>
>
> Bob . . .
>
>
>
>
Message 10
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | For Sale: Two Cheltons, EI MVP-50, Pinpoint ADAHRS |
and Spare Smart Data Cards
For Sale:
* Dual screen Chelton with EIU and Pinpoint, brand new and unopened in the
box in which it was shipped to me from Lancair
* Single screen EFIS with Watson purchased from Greg Poe via eBay in 2004,
never touched since arrival
* Pinpoint ADAHRS (NO GPS) purchased from SteinAir
* Garmin GPS35 antenna to provide GPS signal to Pinpoint ADAHRS (other
antennae work, too)
* Electronics International MVP50 six cylinder with all sensors etc. still
in all the original plastic and bubble wrap
* Two extra Smart Data cards, unused
When there's money to buy avionics, there's no time to build. When there's
time to build, there's not enough money to justify hanging onto the
avionics!
Please contact me with any questions at afm528 (AT) gmail (DOT) com. I'm
motivated, make me a fair offer and it's yours. I'll be posting on a couple
other forums, then eBay if nobody from the forums is interested. Thank you
for looking.
Please forward to anyone you know who might be interested, I'd appreciate
it.
Thank you,
Mike
Lancair ES N9637M (in progress)
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Robert
Borger
Sent: Wednesday, February 08, 2012 6:03 PM
Subject: Re: AeroElectric-List: Red Dot Digital SWR Meter
--> <rlborger@mac.com>
Bob,
Thanks for the quick reply. One last question. After you power up the SWR
Meter, do you transmit on the radio to get the readings or does it magically
throw electrons about to get the readings?
I'll take it to the hanger tomorrow and, with any luck, I'll be able to give
it a test.
Blue skies & tailwinds,
Bob Borger
Europa XS Tri, Rotax 914, Airmaster C/S Prop.
Little Toot Sport Biplane, Lycoming Thunderbolt AEIO-320 EXP
3705 Lynchburg Dr.
Corinth, TX 76208-5331
Cel: 817-992-1117
rlborger@mac.com
On Feb 8, 2012, at 7:07 PM, Robert L. Nuckolls, III wrote:
> --> <nuckolls.bob@aeroelectric.com>
>
> At 05:43 PM 2/8/2012, you wrote:
>> Bob,
>>
>> The Red Dot Digital SWR Meter that I ordered last week has arrived from
China.
>> Here's a picture of the front:
>>
>> It appears very well built with a steel(?) case.
>>
>> Here's a picture of the back:
>>
>> Now for the best part. Here's a scan of the instructions, front and
back:
>
>
> I think mine is here too. Need to get to the PO Box in the morning.
> I've looked for an English instruction manual but nothing turned up
> in the time I had.
>
> I did find this narrative by a user:
>
> Specifications:
>
> MAX.POWER 120W
> V.S.W.R 1.00~19.9
> FREQUENCY RANGE VHF(145mhz) / UHF(45mhz) COVER:100mhz~500mhz ONSERTION
> LOSS < 0.15dB(VHF) , < 0.25dB(UHF) TEMPERATURE 0?~70?
> BATTERY
> 3 x AAA Type Battery or Rechargeable <2mA
>
> (battery not included in this sale)
>
> SZIE 66*68*37 (mm)
> INTERFACE N(SL16)
> WEIGHT 260g (without battery)
> Instructions:
>
> Battery installation: Remove 4 black round screws on the corner of back
cover and open it. Install 3 AAA batteries. BE CAUTIOUS to the polarities.
Put the cover on and fasten the screws. IMPROPER INSTALLATION OF BACK COVER
WILL CAUSE ERROR ON U-BAND MEASUREMENT!
>
> Connect the Output of your transceiver to "TX" and Antenna or Load to
"ANT". NOTE: UV-Band meter utilize "N" type connectors; and"SL16" connectors
(normally named "M" connecter) for HF-Band. Proper adaptor/cable is required
if your device has different type of connectors.
>
> Press the red button to power on. After 2 seconds of LCD self test, it's
ready for normal measurement.
>
> UV-Band meter will display in sequence:"+ XXX P" (pass through power),"-
XXX P" (feed back power)," XXX G" (SWR value), 2 seconds display for each
mode. Press the red button will hold the current display. Press it again to
continue the display.
>
> Under the environment of night or weak illumination, just press and hold
the red button for 1 second to turn the blue back light on. Press and hold
the red button for 1 second again to turn it off.
>
> 8 minutes after no power was measured, it will power off automatically.
Press and hold the red button for 2 seconds to turn off manually.
>
>
>
> Bob . . .
>
>
>
>
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|