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Today's Topics:
1. Re: Elevation meter Rotor YAESU G-5500 stopped working
(Norm n3ykf)
2. Re: Elevation meter Rotor YAESU G-5500 stopped working (W3AB/GEO)
3. Re: Elevation meter Rotor YAESU G-5500 stopped working
(Norm n3ykf)
4. Re: Elevation meter Rotor YAESU G-5500 stopped working (W3AB/GEO)
5. Re: Elevation meter Rotor YAESU G-5500 stopped working
(Norm n3ykf)
6. SatGate Antenna (Andrew Northam)
7. Request for Respondents - Emergency Responder Applications of
Geosynchronous Amateur Radio Satellites (David Swanson)
8. Using KX3-2M and PX3 as a Mode B receiver (Ryan Noguchi)
9. Re: SatGate Antenna (Scott)
----------------------------------------------------------------------
Message: 1
Date: Tue, 18 Jul 2017 19:47:41 -0400
From: Norm n3ykf <normanlizeth@xxxxx.xxx>
To: Albert van Deursen <avdeur@xxxx.xx>
Cc: "<,amsat-bb@xxxxx.xxxxxxxx <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] Elevation meter Rotor YAESU G-5500 stopped
working
Message-ID:
<CAJUhCTPyZB+rQhsvbthexgUnMBt=zD+TL6wucKWfpsz_TBYwqw@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset="UTF-8"
Albert,
Take EXTREME CARE working on equipment that has power applied.
You'll need a copy of the schematic. Preferably the one that came with
the controller/rotator. There are at least two different power op-amp
power supply layouts. One with a pass transistor and zener diodes, the
other a 75L10 regulator.
Unplug the control box.
Remove the top cover. Remove the front two screws from the bottom
cover. This will let the face (meters, circuit board and switches)
free. (still wired to the rest)
Get two books. Turn the front face down on top of the books, switches
between the books. (to allow the assembly to sit level and not
press/break the switches)
MAKE SURE THE UNIT IS UNPLUGGED!!!!!!!!!!!!!!!!!
Q4 is one half of a 4558 op amp pair(two on one chip, the other runs
AZ output for the aux jack).
Find Q4.
You're mission is to check the various components making up the drive
circuit for the EL meter for trouble.
Could be:
Shorted capacitor
Open diode
Short or open via other means.
MAKE SURE THIS IS UNPLUGGED!!!!!!!!!!!!!!!!!
Use an Ohmmeter to look for capacitors that aren't open (Should look
close to it, at least the values in the circut. Electrolytics are a
different story...) Look for open diodes. Meter anything reasonably
accessable, starting from the wiper on VR2 on the back panel. Some
things are best looked at with respect to ground, others point to
point reading the components in between.
DANGER!!! DANGER!!!! DANGER!!!
This part of the test requires making power on voltage measurements.
Here be dragons, or a trip to your eternal reward!!!
Locate L2 and L4. Those components (each in their seperate circuit)
form the power supplies (rails) for the EL op amp. See C1 (the voltage
output) next to L2? C2 likewise next to L4?
Check the pins 8(C1) with respect to ground and 4(C2) of Q4. These are
the power supply rails (should be +/- 12 volts or so).
Before plugging it in to test, make sure no bare wires are touching
things they should not be.
Plug it in (you did leave the power switch on, didn't you??). Test
away. UNPLUG IT AS SOON AS YOU'RE DONE!!!!
Have fun and don't break anything. A fire here is a failure.
Norm n3ykf
On Tue, Jul 18, 2017 at 5:56 PM, Albert van Deursen <avdeur@xxxx.xx> wrote:
> Hi all,
>
>
>
> All of a sudden the elevation meter stopped working of my Yaesu G-5500 rotor
> controller unit .
>
> No issue with the AZ meter. Rotor itself keeps on steering / working
> without any problem in EL &AZ (via interface EA4TX ARS-USB) so all still
> working fine (fortunately !) for satellite work.
>
> Looks like a component failure in the controller unit or the meter itself ?
>
>
>
>
> A physical check (opening the controller unit) didn't show any anomaly.
> Being a not too tech ham was wondering if any of you Yaesu rotor users had
> seen this problem before / around ?
>
>
>
> Possibly anyone to hint/ indicate at a quick check in the schematic wire
> diagram to where to start looking for this failure ?
>
>
>
>
>
> Thanks beforehand for yr appreciated advice
>
> 73
>
> Albert
>
> PD0OXW
>
>
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
expressed
> are solely those of the author, and do not reflect the official views of
AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 2
Date: Tue, 18 Jul 2017 17:01:06 -0700
From: W3AB/GEO <w3ab@xxxxx.xxx>
To: Norm n3ykf <normanlizeth@xxxxx.xxx>
Cc: amsat-bb@xxxxx.xxxx Albert van Deursen <avdeur@xxxx.xx>
Subject: Re: [amsat-bb] Elevation meter Rotor YAESU G-5500 stopped
working
Message-ID: <4aa9b311-114d-4326-9474-fb9eb2ba2d34@xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Norm,
He should make sure it is not an external issue before he dives into the
internal circuitry.
He should also check that the controller is operating before opening the
controller.
Albert, take a VOM, set it on AC and the 50V range if it isn't autoranging.
Turn on the controller. Put 1 lead on pin 6 of the terminal strip, the other
lead on pin 4 and operate the up/down switch. Do the same for pin 5. If the
controller is operating correctly you should measure ~30V. If not, you have
an internal failure and follow Norm's advice.
?___
Sent from my two way wrist watch
73 de W3AB/GEO?
On Jul 18, 2017, 16:50, at 16:50, Norm n3ykf <normanlizeth@xxxxx.xxx> wrote:
>Albert,
>
>Take EXTREME CARE working on equipment that has power applied.
>
>You'll need a copy of the schematic. Preferably the one that came with
>the controller/rotator. There are at least two different power op-amp
>power supply layouts. One with a pass transistor and zener diodes, the
>other a 75L10 regulator.
>
>Unplug the control box.
>
>Remove the top cover. Remove the front two screws from the bottom
>cover. This will let the face (meters, circuit board and switches)
>free. (still wired to the rest)
>
>Get two books. Turn the front face down on top of the books, switches
>between the books. (to allow the assembly to sit level and not
>press/break the switches)
>
>
>MAKE SURE THE UNIT IS UNPLUGGED!!!!!!!!!!!!!!!!!
>
>
>Q4 is one half of a 4558 op amp pair(two on one chip, the other runs
>AZ output for the aux jack).
>
>Find Q4.
>
>You're mission is to check the various components making up the drive
>circuit for the EL meter for trouble.
>
>Could be:
>
>Shorted capacitor
>
>Open diode
>
>Short or open via other means.
>
>MAKE SURE THIS IS UNPLUGGED!!!!!!!!!!!!!!!!!
>
>Use an Ohmmeter to look for capacitors that aren't open (Should look
>close to it, at least the values in the circut. Electrolytics are a
>different story...) Look for open diodes. Meter anything reasonably
>accessable, starting from the wiper on VR2 on the back panel. Some
>things are best looked at with respect to ground, others point to
>point reading the components in between.
>
>DANGER!!! DANGER!!!! DANGER!!!
>
>This part of the test requires making power on voltage measurements.
>Here be dragons, or a trip to your eternal reward!!!
>
> Locate L2 and L4. Those components (each in their seperate circuit)
>form the power supplies (rails) for the EL op amp. See C1 (the voltage
>output) next to L2? C2 likewise next to L4?
>
>Check the pins 8(C1) with respect to ground and 4(C2) of Q4. These are
>the power supply rails (should be +/- 12 volts or so).
>
>Before plugging it in to test, make sure no bare wires are touching
>things they should not be.
>
>Plug it in (you did leave the power switch on, didn't you??). Test
>away. UNPLUG IT AS SOON AS YOU'RE DONE!!!!
>
>Have fun and don't break anything. A fire here is a failure.
>
>Norm n3ykf
>
>On Tue, Jul 18, 2017 at 5:56 PM, Albert van Deursen <avdeur@xxxx.xx>
>wrote:
>> Hi all,
>>
>>
>>
>> All of a sudden the elevation meter stopped working of my Yaesu
>G-5500 rotor
>> controller unit .
>>
>> No issue with the AZ meter. Rotor itself keeps on steering / working
>> without any problem in EL &AZ (via interface EA4TX ARS-USB) so all
>still
>> working fine (fortunately !)? for satellite work.
>>
>> Looks like a component failure in the controller unit? or the meter
>itself ?
>>
>>
>>
>>
>> A physical check (opening the controller unit) didn't show any
>anomaly.
>> Being a not too tech ham was wondering if any of you Yaesu rotor
>users had
>> seen this problem before / around ?
>>
>>
>>
>> Possibly anyone to hint/ indicate at a quick check in the schematic
>wire
>> diagram to where to start looking for this failure ?
>>
>>
>>
>>
>>
>> Thanks beforehand for yr appreciated advice
>>
>> 73
>>
>> Albert
>>
>> PD0OXW
>>
>>
>>
>> _______________________________________________
>> Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
>> to all interested persons worldwide without requiring membership.
>Opinions expressed
>> are solely those of the author, and do not reflect the official views
>of AMSAT-NA.
>> Not an AMSAT-NA member? Join now to support the amateur satellite
>program!
>> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>_______________________________________________
>Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
>to all interested persons worldwide without requiring membership.
>Opinions expressed
>are solely those of the author, and do not reflect the official views
>of AMSAT-NA.
>Not an AMSAT-NA member? Join now to support the amateur satellite
>program!
>Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 3
Date: Tue, 18 Jul 2017 20:04:01 -0400
From: Norm n3ykf <normanlizeth@xxxxx.xxx>
To: "W3AB/GEO" <w3ab@xxxxx.xxx>
Cc: "<, amsat-bb@xxxxx.xxxxxxx " <amsat-bb@xxxxx.xxx>, Albert van
Deursen <avdeur@xxxx.xx>
Subject: Re: [amsat-bb] Elevation meter Rotor YAESU G-5500 stopped
working
Message-ID:
<CAJUhCTMBZkd=HQENmnZN1QNKGMC2YR+ifm4avws8o6cwZ1c3Gg@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset="UTF-8"
If the box is driving the tracker (that's what he says), it's not
external. Time to get the screwdriver.
On Tue, Jul 18, 2017 at 8:01 PM, W3AB/GEO <w3ab@xxxxx.xxx> wrote:
> Norm,
>
> He should make sure it is not an external issue before he dives into the
> internal circuitry.
>
> He should also check that the controller is operating before opening the
> controller.
>
> Albert, take a VOM, set it on AC and the 50V range if it isn't autoranging.
> Turn on the controller. Put 1 lead on pin 6 of the terminal strip, the other
> lead on pin 4 and operate the up/down switch. Do the same for pin 5. If the
> controller is operating correctly you should measure ~30V. If not, you have
> an internal failure and follow Norm's advice.
> ___
> Sent from my two way wrist watch
> 73 de W3AB/GEO
>
> On Jul 18, 2017, 16:50, at 16:50, Norm n3ykf <normanlizeth@xxxxx.xxx> wrote:
>>Albert,
>>
>>Take EXTREME CARE working on equipment that has power applied.
>>
>>You'll need a copy of the schematic. Preferably the one that came with
>>the controller/rotator. There are at least two different power op-amp
>>power supply layouts. One with a pass transistor and zener diodes, the
>>other a 75L10 regulator.
>>
>>Unplug the control box.
>>
>>Remove the top cover. Remove the front two screws from the bottom
>>cover. This will let the face (meters, circuit board and switches)
>>free. (still wired to the rest)
>>
>>Get two books. Turn the front face down on top of the books, switches
>>between the books. (to allow the assembly to sit level and not
>>press/break the switches)
>>
>>
>>MAKE SURE THE UNIT IS UNPLUGGED!!!!!!!!!!!!!!!!!
>>
>>
>>Q4 is one half of a 4558 op amp pair(two on one chip, the other runs
>>AZ output for the aux jack).
>>
>>Find Q4.
>>
>>You're mission is to check the various components making up the drive
>>circuit for the EL meter for trouble.
>>
>>Could be:
>>
>>Shorted capacitor
>>
>>Open diode
>>
>>Short or open via other means.
>>
>>MAKE SURE THIS IS UNPLUGGED!!!!!!!!!!!!!!!!!
>>
>>Use an Ohmmeter to look for capacitors that aren't open (Should look
>>close to it, at least the values in the circut. Electrolytics are a
>>different story...) Look for open diodes. Meter anything reasonably
>>accessable, starting from the wiper on VR2 on the back panel. Some
>>things are best looked at with respect to ground, others point to
>>point reading the components in between.
>>
>>DANGER!!! DANGER!!!! DANGER!!!
>>
>>This part of the test requires making power on voltage measurements.
>>Here be dragons, or a trip to your eternal reward!!!
>>
>> Locate L2 and L4. Those components (each in their seperate circuit)
>>form the power supplies (rails) for the EL op amp. See C1 (the voltage
>>output) next to L2? C2 likewise next to L4?
>>
>>Check the pins 8(C1) with respect to ground and 4(C2) of Q4. These are
>>the power supply rails (should be +/- 12 volts or so).
>>
>>Before plugging it in to test, make sure no bare wires are touching
>>things they should not be.
>>
>>Plug it in (you did leave the power switch on, didn't you??). Test
>>away. UNPLUG IT AS SOON AS YOU'RE DONE!!!!
>>
>>Have fun and don't break anything. A fire here is a failure.
>>
>>Norm n3ykf
>>
>>On Tue, Jul 18, 2017 at 5:56 PM, Albert van Deursen <avdeur@xxxx.xx>
>>wrote:
>>> Hi all,
>>>
>>>
>>>
>>> All of a sudden the elevation meter stopped working of my Yaesu
>>G-5500 rotor
>>> controller unit .
>>>
>>> No issue with the AZ meter. Rotor itself keeps on steering / working
>>> without any problem in EL &AZ (via interface EA4TX ARS-USB) so all
>>still
>>> working fine (fortunately !) for satellite work.
>>>
>>> Looks like a component failure in the controller unit or the meter
>>itself ?
>>>
>>>
>>>
>>>
>>> A physical check (opening the controller unit) didn't show any
>>anomaly.
>>> Being a not too tech ham was wondering if any of you Yaesu rotor
>>users had
>>> seen this problem before / around ?
>>>
>>>
>>>
>>> Possibly anyone to hint/ indicate at a quick check in the schematic
>>wire
>>> diagram to where to start looking for this failure ?
>>>
>>>
>>>
>>>
>>>
>>> Thanks beforehand for yr appreciated advice
>>>
>>> 73
>>>
>>> Albert
>>>
>>> PD0OXW
>>>
>>>
>>>
>>> _______________________________________________
>>> Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
>>> to all interested persons worldwide without requiring membership.
>>Opinions expressed
>>> are solely those of the author, and do not reflect the official views
>>of AMSAT-NA.
>>> Not an AMSAT-NA member? Join now to support the amateur satellite
>>program!
>>> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>>_______________________________________________
>>Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
>>to all interested persons worldwide without requiring membership.
>>Opinions expressed
>>are solely those of the author, and do not reflect the official views
>>of AMSAT-NA.
>>Not an AMSAT-NA member? Join now to support the amateur satellite
>>program!
>>Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 4
Date: Tue, 18 Jul 2017 17:06:25 -0700
From: W3AB/GEO <w3ab@xxxxx.xxx>
To: Norm n3ykf <normanlizeth@xxxxx.xxx>
Cc: amsat-bb@xxxxx.xxxx Albert van Deursen <avdeur@xxxx.xx>
Subject: Re: [amsat-bb] Elevation meter Rotor YAESU G-5500 stopped
working
Message-ID: <ba5c12d5-8a55-4a6a-8eb7-d21e0020e066@xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Didn't catch that he was using a tracker. Did he bypass it?
?___
Sent from my two way wrist watch
73 de W3AB/GEO?
On Jul 18, 2017, 17:04, at 17:04, Norm n3ykf <normanlizeth@xxxxx.xxx> wrote:
>If the box is driving the tracker (that's what he says), it's not
>external. Time to get the screwdriver.
>
>
>
>
>
>On Tue, Jul 18, 2017 at 8:01 PM, W3AB/GEO <w3ab@xxxxx.xxx> wrote:
>> Norm,
>>
>> He should make sure it is not an external issue before he dives into
>the
>> internal circuitry.
>>
>> He should also check that the controller is operating before opening
>the
>> controller.
>>
>> Albert, take a VOM, set it on AC and the 50V range if it isn't
>autoranging.
>> Turn on the controller. Put 1 lead on pin 6 of the terminal strip,
>the other
>> lead on pin 4 and operate the up/down switch. Do the same for pin 5.
>If the
>> controller is operating correctly you should measure ~30V. If not,
>you have
>> an internal failure and follow Norm's advice.
>> ___
>> Sent from my two way wrist watch
>> 73 de W3AB/GEO
>>
>> On Jul 18, 2017, 16:50, at 16:50, Norm n3ykf <normanlizeth@xxxxx.xxx>
>wrote:
>>>Albert,
>>>
>>>Take EXTREME CARE working on equipment that has power applied.
>>>
>>>You'll need a copy of the schematic. Preferably the one that came
>with
>>>the controller/rotator. There are at least two different power op-amp
>>>power supply layouts. One with a pass transistor and zener diodes,
>the
>>>other a 75L10 regulator.
>>>
>>>Unplug the control box.
>>>
>>>Remove the top cover. Remove the front two screws from the bottom
>>>cover. This will let the face (meters, circuit board and switches)
>>>free. (still wired to the rest)
>>>
>>>Get two books. Turn the front face down on top of the books, switches
>>>between the books. (to allow the assembly to sit level and not
>>>press/break the switches)
>>>
>>>
>>>MAKE SURE THE UNIT IS UNPLUGGED!!!!!!!!!!!!!!!!!
>>>
>>>
>>>Q4 is one half of a 4558 op amp pair(two on one chip, the other runs
>>>AZ output for the aux jack).
>>>
>>>Find Q4.
>>>
>>>You're mission is to check the various components making up the drive
>>>circuit for the EL meter for trouble.
>>>
>>>Could be:
>>>
>>>Shorted capacitor
>>>
>>>Open diode
>>>
>>>Short or open via other means.
>>>
>>>MAKE SURE THIS IS UNPLUGGED!!!!!!!!!!!!!!!!!
>>>
>>>Use an Ohmmeter to look for capacitors that aren't open (Should look
>>>close to it, at least the values in the circut. Electrolytics are a
>>>different story...) Look for open diodes. Meter anything reasonably
>>>accessable, starting from the wiper on VR2 on the back panel. Some
>>>things are best looked at with respect to ground, others point to
>>>point reading the components in between.
>>>
>>>DANGER!!! DANGER!!!! DANGER!!!
>>>
>>>This part of the test requires making power on voltage measurements.
>>>Here be dragons, or a trip to your eternal reward!!!
>>>
>>> Locate L2 and L4. Those components (each in their seperate circuit)
>>>form the power supplies (rails) for the EL op amp. See C1 (the
>voltage
>>>output) next to L2? C2 likewise next to L4?
>>>
>>>Check the pins 8(C1) with respect to ground and 4(C2) of Q4. These
>are
>>>the power supply rails (should be +/- 12 volts or so).
>>>
>>>Before plugging it in to test, make sure no bare wires are touching
>>>things they should not be.
>>>
>>>Plug it in (you did leave the power switch on, didn't you??). Test
>>>away. UNPLUG IT AS SOON AS YOU'RE DONE!!!!
>>>
>>>Have fun and don't break anything. A fire here is a failure.
>>>
>>>Norm n3ykf
>>>
>>>On Tue, Jul 18, 2017 at 5:56 PM, Albert van Deursen <avdeur@xxxx.xx>
>>>wrote:
>>>> Hi all,
>>>>
>>>>
>>>>
>>>> All of a sudden the elevation meter stopped working of my Yaesu
>>>G-5500 rotor
>>>> controller unit .
>>>>
>>>> No issue with the AZ meter. Rotor itself keeps on steering /
>working
>>>> without any problem in EL &AZ (via interface EA4TX ARS-USB) so all
>>>still
>>>> working fine (fortunately !)? for satellite work.
>>>>
>>>> Looks like a component failure in the controller unit? or the meter
>>>itself ?
>>>>
>>>>
>>>>
>>>>
>>>> A physical check (opening the controller unit) didn't show any
>>>anomaly.
>>>> Being a not too tech ham was wondering if any of you Yaesu rotor
>>>users had
>>>> seen this problem before / around ?
>>>>
>>>>
>>>>
>>>> Possibly anyone to hint/ indicate at a quick check in the schematic
>>>wire
>>>> diagram to where to start looking for this failure ?
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> Thanks beforehand for yr appreciated advice
>>>>
>>>> 73
>>>>
>>>> Albert
>>>>
>>>> PD0OXW
>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>> Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum
>available
>>>> to all interested persons worldwide without requiring membership.
>>>Opinions expressed
>>>> are solely those of the author, and do not reflect the official
>views
>>>of AMSAT-NA.
>>>> Not an AMSAT-NA member? Join now to support the amateur satellite
>>>program!
>>>> Subscription settings:
>http://www.amsat.org/mailman/listinfo/amsat-bb
>>>_______________________________________________
>>>Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
>>>to all interested persons worldwide without requiring membership.
>>>Opinions expressed
>>>are solely those of the author, and do not reflect the official views
>>>of AMSAT-NA.
>>>Not an AMSAT-NA member? Join now to support the amateur satellite
>>>program!
>>>Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 5
Date: Tue, 18 Jul 2017 20:11:17 -0400
From: Norm n3ykf <normanlizeth@xxxxx.xxx>
To: "W3AB/GEO" <w3ab@xxxxx.xxx>
Cc: "<, amsat-bb@xxxxx.xxxxxxx " <amsat-bb@xxxxx.xxx>, Albert van
Deursen <avdeur@xxxx.xx>
Subject: Re: [amsat-bb] Elevation meter Rotor YAESU G-5500 stopped
working
Message-ID:
<CAJUhCTOcue-i9GAtP+FxWeYYXd8ER=hXZ0PxHu9yuiqaDgUx_g@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset="UTF-8"
Sez he's using a tracker (ea3tx), it's rotating the rotator just fine.
EL meter on the G-5500 does not work (only symptom). The schematic
shows the segmentation of the drive circuitry. If the tracker is being
driven (ADC from terminal two repeated on the aux jack), should be
internal problem.
Triage is critical for this stuff. I have lost weekends
This problem is just an annoyance for now.
On Tue, Jul 18, 2017 at 8:06 PM, W3AB/GEO <w3ab@xxxxx.xxx> wrote:
> Didn't catch that he was using a tracker. Did he bypass it?
>
> ___
> Sent from my two way wrist watch
> 73 de W3AB/GEO
>
> On Jul 18, 2017, 17:04, at 17:04, Norm n3ykf <normanlizeth@xxxxx.xxx> wrote:
>>If the box is driving the tracker (that's what he says), it's not
>>external. Time to get the screwdriver.
>>
>>
>>
>>
>>
>>On Tue, Jul 18, 2017 at 8:01 PM, W3AB/GEO <w3ab@xxxxx.xxx> wrote:
>>> Norm,
>>>
>>> He should make sure it is not an external issue before he dives into
>>the
>>> internal circuitry.
>>>
>>> He should also check that the controller is operating before opening
>>the
>>> controller.
>>>
>>> Albert, take a VOM, set it on AC and the 50V range if it isn't
>>autoranging.
>>> Turn on the controller. Put 1 lead on pin 6 of the terminal strip,
>>the other
>>> lead on pin 4 and operate the up/down switch. Do the same for pin 5.
>>If the
>>> controller is operating correctly you should measure ~30V. If not,
>>you have
>>> an internal failure and follow Norm's advice.
>>> ___
>>> Sent from my two way wrist watch
>>> 73 de W3AB/GEO
>>>
>>> On Jul 18, 2017, 16:50, at 16:50, Norm n3ykf <normanlizeth@xxxxx.xxx>
>>wrote:
>>>>Albert,
>>>>
>>>>Take EXTREME CARE working on equipment that has power applied.
>>>>
>>>>You'll need a copy of the schematic. Preferably the one that came
>>with
>>>>the controller/rotator. There are at least two different power op-amp
>>>>power supply layouts. One with a pass transistor and zener diodes,
>>the
>>>>other a 75L10 regulator.
>>>>
>>>>Unplug the control box.
>>>>
>>>>Remove the top cover. Remove the front two screws from the bottom
>>>>cover. This will let the face (meters, circuit board and switches)
>>>>free. (still wired to the rest)
>>>>
>>>>Get two books. Turn the front face down on top of the books, switches
>>>>between the books. (to allow the assembly to sit level and not
>>>>press/break the switches)
>>>>
>>>>
>>>>MAKE SURE THE UNIT IS UNPLUGGED!!!!!!!!!!!!!!!!!
>>>>
>>>>
>>>>Q4 is one half of a 4558 op amp pair(two on one chip, the other runs
>>>>AZ output for the aux jack).
>>>>
>>>>Find Q4.
>>>>
>>>>You're mission is to check the various components making up the drive
>>>>circuit for the EL meter for trouble.
>>>>
>>>>Could be:
>>>>
>>>>Shorted capacitor
>>>>
>>>>Open diode
>>>>
>>>>Short or open via other means.
>>>>
>>>>MAKE SURE THIS IS UNPLUGGED!!!!!!!!!!!!!!!!!
>>>>
>>>>Use an Ohmmeter to look for capacitors that aren't open (Should look
>>>>close to it, at least the values in the circut. Electrolytics are a
>>>>different story...) Look for open diodes. Meter anything reasonably
>>>>accessable, starting from the wiper on VR2 on the back panel. Some
>>>>things are best looked at with respect to ground, others point to
>>>>point reading the components in between.
>>>>
>>>>DANGER!!! DANGER!!!! DANGER!!!
>>>>
>>>>This part of the test requires making power on voltage measurements.
>>>>Here be dragons, or a trip to your eternal reward!!!
>>>>
>>>> Locate L2 and L4. Those components (each in their seperate circuit)
>>>>form the power supplies (rails) for the EL op amp. See C1 (the
>>voltage
>>>>output) next to L2? C2 likewise next to L4?
>>>>
>>>>Check the pins 8(C1) with respect to ground and 4(C2) of Q4. These
>>are
>>>>the power supply rails (should be +/- 12 volts or so).
>>>>
>>>>Before plugging it in to test, make sure no bare wires are touching
>>>>things they should not be.
>>>>
>>>>Plug it in (you did leave the power switch on, didn't you??). Test
>>>>away. UNPLUG IT AS SOON AS YOU'RE DONE!!!!
>>>>
>>>>Have fun and don't break anything. A fire here is a failure.
>>>>
>>>>Norm n3ykf
>>>>
>>>>On Tue, Jul 18, 2017 at 5:56 PM, Albert van Deursen <avdeur@xxxx.xx>
>>>>wrote:
>>>>> Hi all,
>>>>>
>>>>>
>>>>>
>>>>> All of a sudden the elevation meter stopped working of my Yaesu
>>>>G-5500 rotor
>>>>> controller unit .
>>>>>
>>>>> No issue with the AZ meter. Rotor itself keeps on steering /
>>working
>>>>> without any problem in EL &AZ (via interface EA4TX ARS-USB) so all
>>>>still
>>>>> working fine (fortunately !) for satellite work.
>>>>>
>>>>> Looks like a component failure in the controller unit or the meter
>>>>itself ?
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> A physical check (opening the controller unit) didn't show any
>>>>anomaly.
>>>>> Being a not too tech ham was wondering if any of you Yaesu rotor
>>>>users had
>>>>> seen this problem before / around ?
>>>>>
>>>>>
>>>>>
>>>>> Possibly anyone to hint/ indicate at a quick check in the schematic
>>>>wire
>>>>> diagram to where to start looking for this failure ?
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> Thanks beforehand for yr appreciated advice
>>>>>
>>>>> 73
>>>>>
>>>>> Albert
>>>>>
>>>>> PD0OXW
>>>>>
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum
>>available
>>>>> to all interested persons worldwide without requiring membership.
>>>>Opinions expressed
>>>>> are solely those of the author, and do not reflect the official
>>views
>>>>of AMSAT-NA.
>>>>> Not an AMSAT-NA member? Join now to support the amateur satellite
>>>>program!
>>>>> Subscription settings:
>>http://www.amsat.org/mailman/listinfo/amsat-bb
>>>>_______________________________________________
>>>>Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
>>>>to all interested persons worldwide without requiring membership.
>>>>Opinions expressed
>>>>are solely those of the author, and do not reflect the official views
>>>>of AMSAT-NA.
>>>>Not an AMSAT-NA member? Join now to support the amateur satellite
>>>>program!
>>>>Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 6
Date: Tue, 18 Jul 2017 16:50:13 -0400
From: Andrew Northam <andrewbnortham@xxxxx.xxx>
To: AMSAT-BB@xxxxx.xxx
Subject: [amsat-bb] SatGate Antenna
Message-ID:
<CAOeHS4e16nBVJ8c=zUACPhuMVzMg0cWYuiNZis4Xk1-LGY4UpQ@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset="UTF-8"
I would like to setup an SatGate, I have been running an iGate for a little
while, and already have the Pi, TNC, Radio, LMR400...I have read the page (
http://aprs.org/aprs-satellite-igate-antennas.html) about antennas, and
they all recommend a large ground plane, however I have a ranch style
house, and would like to put the antenna on the peak of my roof on a small
mast.
What kind of antenna would be best for on the peak of a roof? Would a 3/4
wave monopole work? Or should I look for something with radiators?
I have a great view to the North, East and South, but trees to the west
from Michigan (EN72ef)
Thanks for your help!
Andrew/KE8FZT
------------------------------
Message: 7
Date: Tue, 18 Jul 2017 23:07:44 -0500
From: David Swanson <david.swanson@xxxxx.xxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Request for Respondents - Emergency Responder
Applications of Geosynchronous Amateur Radio Satellites
Message-ID:
<CABuuUTUR_K_FKTJJJfeFBgO29tNhFfnG5dfQiEotVMvyJmbCQA@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset="UTF-8"
Satellite Friends and Colleagues,
The vast majority of you know me as Dave, KG5CCI, a guy that climbs
mountains with his Arrow to make long distance contacts on the birds. Many
of you don?t know me though as Dave Swanson, Graduate Student, in the
Disaster Preparedness and Emergency Management (DPEM) program at Arkansas
State University. Today, the student version of myself is coming to you
with a request for assistance.
With the promise of one or more Phase IV geosynchronous satellite launches
in the coming years, and the obvious applications of such missions to the
DPEM community, I am conducting research to determine how many ground
operators have the required skills, equipment, and experience to utilize
such satellites. I am also working to answer several questions surrounding
the use of these satellites in the different environments that might be
experienced by amateurs serving in an emergency communications role, and
how such operations might work in conjunction with similar governmental,
non-government, and commercial missions.
I would appreciate anyone on this list, who has an interest in the Phase IV
launches, an interest in emergency communications, or just an interest in
helping a fellow ham finish his Master?s degree to click on the link below
and spend a few minutes answering some questions. If you also happen to be
part of the emergency management community, as well as an AMSAT ham, I
would ask that you forward this link to any of your colleagues outside of
AMSAT-BB who might be interested as well.
If you have any questions please feel free to reach out to me or my
adviser, via our contact information on the first page of the survey.
Go to this link to take the Survey:
https://www.surveymonkey.com/r/Z3RBGGH
Thanks, and 73.
Dave Swanson, KG5CCI
Arkansas State University
------------------------------
Message: 8
Date: Wed, 19 Jul 2017 05:14:46 +0000 (UTC)
From: Ryan Noguchi <ai6do@xxxxx.xxx>
To: AMSAT BB <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Using KX3-2M and PX3 as a Mode B receiver
Message-ID: <1342385379.209973.1500441286437@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
I'm thinking about getting the KX3-2M transverter module to allow a KX3 to
serve as a more sensitive receiver for working the Mode B linear satellites
than the TH-F6A I'm currently using.?
I'm hoping to use the PX3 panadapter to provide situational awareness of
activity across the entire transponder. Does anyone have any experience
using the PX3 with the KX3-2M, particularly for satellite operation??
An SDR and tablet/laptop solution is much less desirable since I prefer to
operate entirely pedestrian-mobile.?
Thanks and 73, Ryan AI6DO
------------------------------
Message: 9
Date: Wed, 19 Jul 2017 01:46:45 -0400
From: Scott <scott23192@xxxxx.xxx>
To: AMSAT-BB@xxxxx.xxx
Subject: Re: [amsat-bb] SatGate Antenna
Message-ID:
<CAJCSnOagNe0DPEga53+yHT_1u0TNm3EN-dLxSQ4-zpdpW7TJcg@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset="UTF-8"
Hi Andrew!
I could have written your email... I think I match everything you listed
including the ranch style house.
I have also been searching for an antenna upgrade in hopes of improving my
145.825 iGate situation. Since the ISS returned to 2-meters, my iGate went
from a good contributor to absolute zero.
It worked great and covered a lot of territory when the ISS digipeater was
on 70cm, but now it's rare that I receive a packet from the ISS on VHF.
Works fine if I switch to 144.39 APRS, but it's ineffective with the ISS.
So, one obvious thing to optimize is the antenna. While I believe it's
better for horizontal distance (than in the upwards direction), I recently
spotted a 5/8 wave 2m/70cm mag mount antenna sitting around the house that
was not being used. So, I mounted that on an old DirecTV bracket at the
edge of the roof. However, since that antenna works best on a flat ground
plane, it didn't do all that well with my 144.39 APRS benchmark. Feel free
to laugh but I put a pizza pan under it and left the Pi monitoring the
local APRS digipeater on 144.39 this evening and the packets rolled in
nicely. So, I'm going to leave that on 145.825 for several days to see if
I have any luck.
FYI, previously I had tried an Arrow dual-band J-pole and my 137 MHz QFH.
Both were ok for 144.39 APRS but heard nothing from the ISS. Should anyone
wonder, I'm not judging that by what appears on ariss.net; I could always
be sending duplicates. But rather, I'm basing my evaluation on the
direwolf logs on the Pi that show all received packets.
Finally, I can't dedicate my 2m X-Quad on an AZ-only rotator to the iGate,
but when I have used it on selected ISS passes, I can often pick up some
packets with the huge increase in antenna gain. No LNA on the 2m beam
(SP-70 is on the 70cm X-Quad), but even without a 2m pre-amp, it does a
pretty good job for ISS packet, 2m uplink to sats, and 2m downlink from
various cubesats.
So, I don't have any grand recommendation for you but just wanted to share
my progress since it sounds like we're in the same boat.
-Scott, K4KDR
=====================================================================
On Tue, Jul 18, 2017 at 4:50 PM, Andrew Northam <andrewbnortham@xxxxx.xxx>
wrote:
> I would like to setup an SatGate, I have been running an iGate for a little
> while, and already have the Pi, TNC, Radio, LMR400...I have read the page (
> http://aprs.org/aprs-satellite-igate-antennas.html) about antennas, and
> they all recommend a large ground plane, however I have a ranch style
> house, and would like to put the antenna on the peak of my roof on a small
> mast.
>
> What kind of antenna would be best for on the peak of a roof? Would a 3/4
> wave monopole work? Or should I look for something with radiators?
>
> I have a great view to the North, East and South, but trees to the west
> from Michigan (EN72ef)
>
> Thanks for your help!
>
> Andrew/KE8FZT
------------------------------
Subject: Digest Footer
_______________________________________________
Sent via amsat-bb@xxxxx.xxx.
AMSAT-NA makes this open forum available to all interested persons worldwide
without requiring membership. Opinions expressed
are solely those of the author, and do not reflect the official views of
AMSAT-NA.
Not an AMSAT member? Join now to support the amateur satellite program!
http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
End of AMSAT-BB Digest, Vol 12, Issue 178
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