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CX2SA > SATDIG 20.07.17 22:50l 985 Lines 31769 Bytes #999 (0) @ WW
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From: CX2SA@CX2SA.SAL.URY.SOAM
To : SATDIG@WW
Today's Topics:
1. Re: Elevation meter Rotor YAESU G-5500 stopped working (Robert)
2. Re: Russian Thing (Simon Brown)
3. Re: Elevation meter Rotor YAESU G-5500 stopped working
(GEO Badger)
4. Possible FM13 grid square activation July 22nd or 23rd
(John Brier)
5. Re: Russian Thing (mvivona@xxxxx.xxxx
6. Re: Elevation meter Rotor YAESU G-5500 stopped working
(Albert van Deursen)
7. Re: Elevation meter Rotor YAESU G-5500 stopped working
(Albert van Deursen)
8. WD9EWK @ DM35/45, Thursday (20 July) afternoon
(Patrick STODDARD (WD9EWK/VA7EWK))
9. Grid JO76 (Sweden) tomorrow 21 July SO-50 / FOX 1A
(Felix Paez EA4GQS)
10. NJ7H/retired (Gabriel Zeifman)
----------------------------------------------------------------------
Message: 1
Date: Wed, 19 Jul 2017 12:40:52 -0400
From: Robert <robert@xxxxx.xxx>
To: Norm n3ykf <normanlizeth@xxxxx.xxx>, Albert van Deursen
<avdeur@xxxx.xx>
Cc: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] Elevation meter Rotor YAESU G-5500 stopped
working
Message-ID: <c2870795-3d39-4e0b-cfbe-b69535012157@xxxxx.xxx>
Content-Type: text/plain; charset=utf-8; format=flowed
Albert,
I had the same kind of failure...in my case it was the LM/MC 7806C
voltage regulator. At Mouser in the USA, it is a $0.62 part.
https://www.fairchildsemi.com/datasheets/LM/LM7806.pdf
Your problem may be something different...but wanted to give you one
more place to investigate.
73 de Robert K3RRR
------
73 de Robert K3RRR
K3RRR.com
@xxxxxxxxx
YouTube.com/user/K3RRR
On 7/18/2017 7:47 PM, Norm n3ykf 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
------------------------------
Message: 2
Date: Wed, 19 Jul 2017 19:06:35 +0100
From: "Simon Brown" <simon@xxxxxxxxx.xxx>
To: "'Robert Bruninga'" <bruninga@xxxx.xxx>, <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] Russian Thing
Message-ID: <012b01d300b9$c25ab2b0$47101810$@xxxxxxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"
Bob,
You'll also see reflections from aeroplanes.
Simon Brown, G4ELI
www.sdr-radio.com
-----Original Message-----
From: AMSAT-BB [mailto:amsat-bb-bounces@xxxxx.xxxx On Behalf Of Robert
Bruninga
Sent: 19 July 2017 13:27
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] Russian Thing
Easy to test. Just pick a UHF TV station that is hudreds of miles ffrom you
and wait for the ISS to fly through the path between you.
BUT! I don't have a clue how you can see the effect with Digital TV???
With analog, the flutter was instantaneous and a direct correspondence to
signal strength even if only milliseconds came through. On digital TV, you
don't get nuttin until you have had SOLID seconds of unflutter digital
signal.
So I guess that old technique is simply dead.
Maybe do it with FM radio? They have a multi thousand watt transmitter
aimed at their horizon. Just choose a station that is 500 miles away...
Better yet, simply tune to a totally clear FM channel in your rural area (if
there is one) and wait. If the ISS flies through the path of any station
anywhere on that channel, you should hear something?
Bob
------------------------------
Message: 3
Date: Wed, 19 Jul 2017 18:38:07 +0000 (UTC)
From: GEO Badger <w3ab@xxxxx.xxx>
To: "robert@xxxxx.xxxx <robert@xxxxx.xxx>, Norm n3ykf
<normanlizeth@xxxxx.xxx>, Albert van Deursen <avdeur@xxxx.xx>
Cc: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] Elevation meter Rotor YAESU G-5500 stopped
working
Message-ID: <1430627811.771126.1500489487811@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
My elevation stopped working a while after I installed the LVB tracker. I
disconnected the tracker, no joy. Checked the controller, it's putting out
the right voltages on pins 4 & 5 relative to pin 6. My outer cover of the
cabling to the rotor has disintegrated and I'm sure some of the wires have
failed. I hope so. I'm going to try to replace the cable today.
BTW, I'm controlling a G-450 AZ and G-500 EL rotor with a G-5500 controller.
I had to install a motor cap in the EL circuitry since the G-500 doesn't
have one in the rotor like the later EL rotors do. I did this so I wouldn't
have to mod the original controllers to use the tracker. I wanted PLUG &
PLAY capability.?---?
Ciao baby, catch you on the flip side. ??
GEO ???
http://www.w3ab.org
Time flies like an arrow, fruit flies like a banana.
From: Robert <robert@xxxxx.xxx>
To: Norm n3ykf <normanlizeth@xxxxx.xxx>; Albert van Deursen <avdeur@xxxx.xx>
Cc: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Sent: Wednesday, July 19, 2017 10:55 AM
Subject: Re: [amsat-bb] Elevation meter Rotor YAESU G-5500 stopped working
Albert,
I had the same kind of failure...in my case it was the LM/MC 7806C
voltage regulator. At Mouser in the USA, it is a $0.62 part.
https://www.fairchildsemi.com/datasheets/LM/LM7806.pdf
Your problem may be something different...but wanted to give you one
more place to investigate.
73 de Robert K3RRR
------
73 de Robert K3RRR
K3RRR.com
@xxxxxxxxx
YouTube.com/user/K3RRR
On 7/18/2017 7:47 PM, Norm n3ykf 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: Wed, 19 Jul 2017 15:52:14 -0400
From: John Brier <johnbrier@xxxxx.xxx>
To: AMSAT BB <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Possible FM13 grid square activation July 22nd or
23rd
Message-ID:
<CALn0fKOkHywwk0recfgTVNZ=F6i5+w4-1t-TBR4wXsPka9x==Q@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset="UTF-8"
I'm heading to my parent's house in FM14 for my Dad's Bday this
weekend and I'm considering activating nearby FM13 while I'm there.
This grid only has a tiny bit of land in it, so it's relatively rare.
If I end up doing it I'll announce on Twitter @xxxxxxxxx [1] for sure.
It will be one of the FM satellites, either SO-50 or AO-85.
73, John Brier KG4AKV
1) https://twitter.com/johnbrier
P.S. Good luck receiving ISS SSTV everyone!
------------------------------
Message: 5
Date: Wed, 19 Jul 2017 21:35:46 +0000 (UTC)
From: "mvivona@xxxxx.xxxx <mvivona@xxxxx.xxx>
To: Simon Brown <simon@xxxxxxxxx.xxx>, 'Robert Bruninga'
<bruninga@xxxx.xxx>, "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] Russian Thing
Message-ID: <315395492.765489.1500500146376@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
You are correct Simon,
Digital TV uses 8VSB coding which?does not allow the signal from either side
to be moving more that a few miles per hour. So, there is no way to have a
Digital TV?receiver?lock on to a reflection from ISS. ?Michael KC4ZVA
From: Simon Brown <simon@xxxxxxxxx.xxx>
To: 'Robert Bruninga' <bruninga@xxxx.xxx>; amsat-bb@xxxxx.xxx
Sent: Wednesday, July 19, 2017 2:10 PM
Subject: Re: [amsat-bb] Russian Thing
Bob,
You'll also see reflections from aeroplanes.
Simon Brown, G4ELI
www.sdr-radio.com
-----Original Message-----
From: AMSAT-BB [mailto:amsat-bb-bounces@xxxxx.xxxx On Behalf Of Robert
Bruninga
Sent: 19 July 2017 13:27
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] Russian Thing
Easy to test.? Just pick a UHF TV station that is hudreds of miles ffrom you
and wait for the ISS to fly through the path between you.
BUT!? I don't have a clue how you can see the effect with Digital TV???
With analog, the flutter was instantaneous and a direct correspondence to
signal strength even if only milliseconds came through.? On digital TV, you
don't get nuttin until you have had SOLID seconds of unflutter digital
signal.
So I guess that old technique is simply dead.
Maybe do it with FM radio?? They have a multi thousand watt transmitter
aimed at their horizon.? Just choose a station that is 500 miles away...
Better yet, simply tune to a totally clear FM channel in your rural area (if
there is one) and wait.? If the ISS flies through the path of any station
anywhere on that channel, you should hear something?
Bob
_______________________________________________
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: Thu, 20 Jul 2017 00:41:58 +0200
From: "Albert van Deursen" <avdeur@xxxx.xx>
To: "'GEO Badger'" <w3ab@xxxxx.xxx>, <robert@xxxxx.xxx>, "'Norm
n3ykf'" <normanlizeth@xxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] Elevation meter Rotor YAESU G-5500 stopped
working
Message-ID: <003401d300e0$3b3d6530$b1b82f90$@xx>
Content-Type: text/plain; charset="UTF-8"
Hi GEO,
Thanks feedback.!
With the advices I got from all of you I hasten to do some controller unit
research by tomorrow.
Let you know once more info available. Thanks so far !
Best regards and 73 from The Netherlands
Albert
PD0OOXW
From: GEO Badger [mailto:w3ab@xxxxx.xxxx
Sent: 19 July 2017 20:38
To: robert@xxxxx.xxxx Norm n3ykf; Albert van Deursen
Cc: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] Elevation meter Rotor YAESU G-5500 stopped working
My elevation stopped working a while after I installed the LVB tracker. I
disconnected the tracker, no joy. Checked the controller, it's putting out
the right voltages on pins 4 & 5 relative to pin 6. My outer cover of the
cabling to the rotor has disintegrated and I'm sure some of the wires have
failed. I hope so. I'm going to try to replace the cable today.
BTW, I'm controlling a G-450 AZ and G-500 EL rotor with a G-5500 controller.
I had to install a motor cap in the EL circuitry since the G-500 doesn't
have one in the rotor like the later EL rotors do. I did this so I wouldn't
have to mod the original controllers to use the tracker. I wanted PLUG &
PLAY capability.
---
Ciao baby, catch you on the flip side.
GEO
http://www.w3ab.org
Time flies like an arrow, fruit flies like a banana.
_____
From: Robert <robert@xxxxx.xxx>
To: Norm n3ykf <normanlizeth@xxxxx.xxx>; Albert van Deursen <avdeur@xxxx.xx>
Cc: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Sent: Wednesday, July 19, 2017 10:55 AM
Subject: Re: [amsat-bb] Elevation meter Rotor YAESU G-5500 stopped working
Albert,
I had the same kind of failure...in my case it was the LM/MC 7806C
voltage regulator. At Mouser in the USA, it is a $0.62 part.
https://www.fairchildsemi.com/datasheets/LM/LM7806.pdf
Your problem may be something different...but wanted to give you one
more place to investigate.
73 de Robert K3RRR
------
73 de Robert K3RRR
K3RRR.com
@xxxxxxxxx
YouTube.com/user/K3RRR
On 7/18/2017 7:47 PM, Norm n3ykf 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: 7
Date: Thu, 20 Jul 2017 01:10:53 +0200
From: "Albert van Deursen" <avdeur@xxxx.xx>
To: "'Norm n3ykf'" <normanlizeth@xxxxx.xxx>, "'W3AB/GEO'"
<w3ab@xxxxx.xxx>, "'Robert'" <robert@xxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] Elevation meter Rotor YAESU G-5500 stopped
working
Message-ID: <00dd01d300e4$4583b7c0$d08b2740$@xx>
Content-Type: text/plain; charset="UTF-8"
Dear OM's !
First of all thanks yr appreciated feedback. Yes rotors work perfectly so
failure must be in the control unit.
Will follow yr hints and revert ASAP. Time to grab the meter (Volt) and
start another kind of "tracking" !
73
Albert
PD0OXW
-----Original Message-----
From: Norm n3ykf [mailto:normanlizeth@xxxxx.xxxx
Sent: 19 July 2017 02:11
To: W3AB/GEO
Cc: Albert van Deursen; <,amsat-bb@xxxxx.xxxxxxx
Subject: Re: [amsat-bb] Elevation meter Rotor YAESU G-5500 stopped working
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, sta 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: 8
Date: Thu, 20 Jul 2017 04:04:46 +0000
From: "Patrick STODDARD (WD9EWK/VA7EWK)" <amsat-bb@xxxxxx.xxx>
To: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] WD9EWK @ DM35/45, Thursday (20 July) afternoon
Message-ID:
<CAN6TEUeo35o8kQuFfE+Cek51jn1eNhrNpr4+FUErtcwaSvVrWw@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset="UTF-8"
Hi!
Weather permitting, I'm planning a quick road trip to northern
Arizona tomorrow (Thursday, 20 July) to work a few passes in
the afternoon. My plan is to park on the DM35/DM45 grid boundary
west of Flagstaff and work passes starting with the shallow
AO-85 pass at high noon (1900 UTC). If the weather holds out,
I'll stay up there through the SO-50 pass at 2339 UTC before
returning home, and I also plan on trying the NO-84 digipeater
if it is active. I won't be on the SSB birds from up there, just
those two FM satellites and (if active) NO-84.
Mobile phone coverage is sketchy in that area, but I will try
to send updates during the day through my @xxxxxx Twitter
account. If you don't use Twitter, you can see these updates
at:
http://twitter.com/WD9EWK
While on the road, I will use APRS to show my loc (based on LoTW):
278 QSOs
149 grids worked, 111 confirmed
26 DXCCs worked, 17 confirmed
34 states worked, 30 confirmed
I think not so bad for a single operator QRP in four days while doing other
stuff as well! Location, location, location...
It was very cool being able to work so much on individual passes, even with
lower birds like SO-50. Being so high on the earth, many of the satellites
would pass over me and allow most of North America and Europe to be worked
on a single pass. It was very cool! Although it could be eerie being alone
for much of the pass as the satellites traversed the oceans with no one
else in the footprint... It was fun to play around in this time
experimenting with things like 50mW on SO-50. Made contacts through out
North and Central America, the Caribbean, Europe, Africa, and Asia!
Dave KG5CCI and I were also able to break the distance record on XW-2D,
which is now the furthest contact on any of the XW-2 satellites! The
operating locations in OX and TF were awesome and usually allowed me to
operate to the horizon and often below in the direction of North America.
It was great to activate ten grids throughout the trip, including some
ultra rare ones (and unheard before). HP74 had only a sliver of land and
the grid corner of HP93/94/IP03/04 were fun grid adventures. In the Faroe
Islands I had a much more difficult horizon, only allowing me to operate to
as low as 3?-7? depending on the direction. The trade off was that I was
able to walk to and operate from the IP61/62 line for nearly every pass!
I am now back in the US (New York City to be exact). Tomorrow I head to
Florida for a few days. Friday night and Saturday I will be driving from
North Florida to Miami. I am hoping to score some new /r grids along the
way, so give me a shout if you need EL95-EM90. EL95-97 will be new /r grids
for me, so those are my focus. I'll be on Twitter like usual, @xxxxxxxxxxx
so that's the best way to get in touch with me. I'll be spending more time
in EM90 and EL99, as opposed to the other ones that I'm just passing
through.
On the 25th I head back to Oklahoma City to begin my training to be an air
traffic controller! With that, I see very little opportunity for me to do
much roving until around late October when I complete that initial training
(I'll still get on on weekends and do some local roving). Which comes to
NJ7H/retired... I am volunteering for Alaska, and I am told that if I
volunteer for Alaska, the FAA will likely gladly place me there (my buddy
just got assigned to West Virginia and he was expecting Wisconsin, so who
knows). Assuming I pass the academy (which I sure hope and will be doing my
damnedest to), I will be finished on October 23rd. If I get Alaska, I am
hoping to make a little detour on the way to attend the AMSAT-NA Symposium
in Reno! The time seems to work just about perfectly for that (assuming I
pass and I get assigned to Alaska). If I do indeed get Alaska, this trip
will have been the last use of NJ7H while abroad as I'll get an Alaskan
call upon crossing the border into Canada on the drive (NJ7H/7 will be
around until the cross into Canada, then VE6NJH until Alaska).
73 and mind your ERP,
Gabe
NJ7H/retired
------------------------------
Subject: Digest Footer
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End of AMSAT-BB Digest, Vol 12, Issue 179
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