Date   

Re: Any feedback signal from a CP4 to APCC ?

Ray Gralak
 

Hi Joe,

The mount could have stopped tracking if you had disconnected APCC from the mount for a while, then reconnected. The mount will stop tracking after the safety park timer expires unless you turn off Safety-Park in APCC. Reconnecting to the mount will then show the mount in the parked and "tracking off" state.

And you would have seen warning errors in APCC if it could not communicate with the mount. To see that behavior, try pulling the serial, USB, or Ethernet cable while APCC is running, assuming you are not using WiFi.

-Ray Gralak
Author of PEMPro
Author of APCC (Astro-Physics Command Center): https://www.astro-physics.com/apcc-pro
Author of Astro-Physics V2 ASCOM Driver: https://www.siriusimaging.com/apdriver

-----Original Message-----
From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of Joe Zeglinski
Sent: Monday, September 7, 2020 3:03 PM
To: ap-gto.groups.io
Subject: [ap-gto] Any feedback signal from a CP4 to APCC ?

Hi Ray,

Last night, for the first time, I found myself with my AP-1200 “Emergency Parked” while I was using SKY
CHARTS to position the mount for a photo. When I happened to glance at the bottom of the APCC window, I
noticed that Tracking was turned OFF. It must have been sitting at its last work position for quite a while. My first
thought was that I had photographed streaks from one of Elon Musks swarms in orbit. I assume it was the result
of “Loss of comms” CP4 time-out, with APCC – so the CP4 safely shut down the mount where it was. There was
nothing actually wrong with the CP4, and Unparking it let me retake the shot, and run the rest of the night problem
& error free..

We have been advised in the past, that the Handpad is a plain “send-only” comms terminal device, and doesn’t
receive data from the controller. However, I wonder if there is any other ( perhaps indirect) way of the APCC
realizing that it wasn’t being heard any longer by a CPx controller, so that the control program could flash up a
User Emergency Warning of this state. Perhaps a CPx “mount not-ready” signal. That would save a long night of
futile imaging, when nothing is permanently wrong.

Joe Z.


Re: GTOCP3 and serial

michaeljhanson@...
 

Hi Gert,

Since a PC is the "terminal", so the CPx is the data communications equipment, DCE.  A standard straight-through RS-232 cable is used from a computer or USB-to-serial-converter, to the unit.

We use dumb data terminal programs like TeraTerm and HyperTerm *ALL* the time, in exactly the manner you describe.  The command set has it's origins in the old LX200 textual command set, so it is easy to issue them manually for diagnostic purposes.  The command set is published on the AP web-site.  However, examples of commands I use regularly to determine if a unit is alive, "reachable", and that I am even using the correct comm port in the computer, include "read version"  :V# (three characters), and "read local time"  :GL# (4 characters).  You'll want the terminal emulator "local echo" enabled as the CPx does not "echo".

The moment you power up the unit, it will transmit a single character, "1".  That way you know the unit is powered and the embedded software is actually trying to doing something.  This may be the single most powerful diagnostic feature. The serial communication parameters are also published on the AP website.  But to summarize here for ease in setting up the terminal emulator:
9600 baud, No Parity, 8 bits, 1 stop bit, No handshake.  Occasionally, folks "complain" about the lack of parity, but the serial interface remains the most reliable by far.

Happy Hacking!

Regards,
Mike Hanson


Any feedback signal from a CP4 to APCC ?

Joe Zeglinski
 

Hi Ray,
 
    Last night, for the first time, I found myself with my AP-1200 “Emergency Parked” while I was using SKY CHARTS to position the mount for a photo. When I happened to glance at the bottom of the APCC window, I noticed that Tracking was turned OFF. It must have been sitting at its last work position for quite a while. My first thought was that I had photographed streaks from one of Elon Musks swarms in orbit.  I assume it was the result of “Loss of comms” CP4 time-out,  with APCC – so the CP4 safely shut down the mount where it was. There was nothing actually wrong with the CP4, and Unparking it let me retake the shot, and run the rest of the night problem & error free..
 
    We have been advised in the past, that the Handpad is a plain “send-only” comms terminal device, and doesn’t receive data from the controller. However, I wonder if there is any other ( perhaps indirect) way of the APCC realizing that it wasn’t being heard any longer by a CPx controller, so that the control program could flash up a User Emergency Warning of this state. Perhaps a CPx “mount not-ready” signal. That would save a long night of futile imaging, when nothing is permanently wrong.
 
Joe Z.


Re: GTOCP3 and serial

drgert1
 

Hi Woody,

Thank you for the kind feedback. My own experience is that these things don't work for me 'out of the box' so I have to travel the path of step by step debug / understanding / fixing / deployment. To me that also let's me understand why something works, and what I did to make it work. I'll keep looking for a way to establish a known-good terminal to GTOCP3 communication by existing cable and then step by step deploy the BT.

Thanks & Clear Skies,
Gert


Re: GTOCP3 and serial

Woody Schlom
 

Gert,

 

I don’t know if this helps, but when I use my RN-270 (or SkyBT) serial to BT devices with my Mach1-GTO w/ CP3 controller, I don’t change ANY of the DIP switches on the serial to BT device – I leave them all in their default positions.

 

And in that configuration, I can use either SkySafari running on an Android phone or tablet, or TheSkyX running on my laptop along with COM2TCP.

 

I never needed to change a single setting.  And that’s a good thing for me.

 

Woody

 

From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of drgert1 via groups.io
Sent: Monday, September 07, 2020 2:20 PM
To: main@ap-gto.groups.io
Subject: [ap-gto] GTOCP3 and serial

 

Hello All,

I am in a mighty struggle with serial protocol. Esp. how many configurations there are that will make it not work.

Ultimate plan is to use a serial Bluetooth dongle at the mount (AP1200 with GTOCP3 V2 chip).

But for now I just want to see that a text terminal program on the PC can talk to the PC can talk to the GTOCP3 and get ASCII answers. And that's just my question. If I hook up the laptop to the GTOCP3 (the way I up to now always do) via serial cable and serial-to-USB adapter, is there a simple 'Hello' -> 'OK' conversation that I can have with the controller? Just so that I can see that communication is established. Something like an 'AT' ->'OK'. In plain ASCII. Using 'PuTTY' on the laptop. What's the procedure? I understand that the AP driver sends tons of data between the laptop and the mount. I don't even want to include the driver here. Just type on the keyboard, see the echo, hit a command + enter, and see the answer from the controller. (preferably a non-destructive command)

BTW, the BT adapter wants to know if the port is DCE or DTE. Can someone answer for the GTOCP3 ??

Thanks,
Gert


Re: Dec drive problem

Christopher Erickson
 

Over the years I have developed a habit of putting big fuzzy car washing mitts or neoprene camera pouches over protruding counterweight shafts and such.

I also use glow-in-the-dark tape on all kinds of things in an observatory. Scopestuff.com sells a good GITD tape. You can find various GITD tapes on Amazon too. I use it to trim and define the edges of things. Especially important on steps.

I also prefer to paint observatory floors glossy white, which is a lot safer than flat black. Walls and dome interiors I prefer to make flat black if there is any light pollution in your area.

On Sun, Sep 6, 2020, 3:02 AM thefamily90 Phillips <thefamily90@...> wrote:
Yeow!

Can’t tell you how many times I have walked into the counterweight shaft in the dark. I was knocked to the ground one time, but, my hard head saved me.😜

Jim


From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Ben Lutch <procyon@...>
Sent: Saturday, September 5, 2020 9:23:33 PM
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: Re: [ap-gto] Dec drive problem
 

I got a few stitches in my head about a year ago from taking the counterweight off a mount that I thought had the clutches secure.  Counterweight shaft got me right above the left eyebrow.  Oops.
b

On Fri, Sep 4, 2020 at 10:15 AM thefamily90 Phillips <thefamily90@...> wrote:
Spoke directly with George and we tested the motor different ways. He told me to be careful as an out of balanced scope will spin when I remove everything. He is getting a work order (?) for me and I will be shipping it in next week.

Thanks everyone!

Jim

From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of uncarollo2 <chris1011@...> via groups.io <chris1011=aol.com@groups.io>
Sent: Friday, September 4, 2020 10:05 AM
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: Re: [ap-gto] Dec drive problem
 
Hi Jim,

Remove these 5 screws to remove the gearbox from the mounting plate:





-----Original Message-----
From: thefamily90 Phillips <thefamily90@...>
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Sent: Fri, Sep 4, 2020 10:02 am
Subject: [ap-gto] Dec drive problem


Subject: Dec drive problem
 
One of my older AP 1200 go to mounts has a problem. The deck drive does not work properly. When I use the keypad to move the mount north or south there is just a jerky movement or, the telescope starts going around in a circle nonstop. This happened to a previous mount of mine years ago and George at AP was able to fix/replace it. I cannot recall which screws/bolts to remove to remove the drive. I will also have to get a work order number as well. Here is a pic. Thanks for any help.
The mount is at my farm and I will only be here until Monday so I need to get the drive off so I can ship it when I get back home.

Thanks,

Jim


-Christopher Erickson
Observatory engineer
Waikoloa, HI 96738
www.summitkinetics.com
   


GTOCP3 and serial

drgert1
 

Hello All,

I am in a mighty struggle with serial protocol. Esp. how many configurations there are that will make it not work.

Ultimate plan is to use a serial Bluetooth dongle at the mount (AP1200 with GTOCP3 V2 chip).

But for now I just want to see that a text terminal program on the PC can talk to the PC can talk to the GTOCP3 and get ASCII answers. And that's just my question. If I hook up the laptop to the GTOCP3 (the way I up to now always do) via serial cable and serial-to-USB adapter, is there a simple 'Hello' -> 'OK' conversation that I can have with the controller? Just so that I can see that communication is established. Something like an 'AT' ->'OK'. In plain ASCII. Using 'PuTTY' on the laptop. What's the procedure? I understand that the AP driver sends tons of data between the laptop and the mount. I don't even want to include the driver here. Just type on the keyboard, see the echo, hit a command + enter, and see the answer from the controller. (preferably a non-destructive command)

BTW, the BT adapter wants to know if the port is DCE or DTE. Can someone answer for the GTOCP3 ??

Thanks,
Gert


Re: PEMPro vs PHD2 #Guiding

CurtisC
 

On Mon, Sep 7, 2020 at 03:38 PM, Ray Gralak wrote:
Probably not. The worm would not vary between worm cycles.
Most of the time it doesn't.  That was unusual.  I haven't been able to repeat the low number or the spread between runs.  Remeshing the gears hasn't made much difference.  I've considered swapping the DEC and RA drives.  Several weeks ago, while I was cleaning and relubing the drives, George warned me that the RA drive has the better worm and that I should be careful not to mix up the parts.  But surely the DEC worm is better than what I'm getting.


Re: PEMPro vs PHD2 #Guiding

Ray Gralak
 

Please affirm: PEMPro, while it's doing a PE run,
knows the exact rotational position of the worm any moment,
Yes.

It is my belief that the worm is simply worn out
Probably not. The worm would not vary between worm cycles. More likely it is a gear mesh and/or differences between worm wheel teeth. If there is dirt, grit, etc., on some teeth that could also cause variations between worm cycles.

-Ray Gralak
Author of PEMPro
Author of APCC (Astro-Physics Command Center): https://www.astro-physics.com/apcc-pro
Author of Astro-Physics V2 ASCOM Driver: https://www.siriusimaging.com/apdriver


-----Original Message-----
From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of CurtisC via groups.io
Sent: Monday, September 7, 2020 12:59 PM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] PEMPro vs PHD2 #Guiding

[Edited Message Follows]

Ray: Thank you for looking at my data.

During the afternoon of Sep 2, prior to the runs I sent to you, I removed the RA box. I thought maybe there was
"gunk" deep in the teeth of the worm. Maybe that was the cause of my bad numbers. So I made a special point of
cleaning out the teeth in the center part of the worm with a toothbrush and paper towels pressed over a fingernail.
I'd already cleaned out the teeth a month ago, but this was a special effort to get to the bottom of it, so to speak. I
then put more lube on the worm and reassembled the motor to the mount. Since I'd spun the worm several times, I
had no choice but to do a PEMPro run. That produced the 6-something curve. I reran the curve late in the
evening, hoping I'd see evidence of a consistent improvement. I don't want to rely on an anomalous one-off curve
to program the mount. The second run gave me the 11-something result. I attribute the "good" curve to new
grease in the teeth of the worm, grease that was redistributed during subsequent imaging with the mount and then
the late PEMPro run (was there more than one? I forget.) Since the evening of Sep 2-3, subsequent remeshings
and PEMPro runs have produced p-to-p in the area of 18 and 19. The curves are smooth. Last night I had 19 p-
to-p. But, with PEC on, the corrected curve was 0.87, which I thought was pretty good. All of this is with
fundamentals 1, 2, and 3 checked.

Thank you again, Ray.

Please affirm: PEMPro, while it's doing a PE run, knows the exact rotational position of the worm any moment,
does it not? When the dots start appearing on the graph, the starting location isn't random. The starting location
and subsequent dots correspond to real, definable positions on the worm. Sometime during the recent weeks, a
consistent broad hump in the middle of the curve was replaced by a consistent broad trough. I attribute this to my
fiddling with the worm.

To continue, during these recent weeks, I've spent a lot of time in the message archives of this forum, looking at
any discussions about Mach1 PE, worms, motor boxes, PEMPro, etc. Naturally, I've paid special attention to any
comments from you and Roland, and the rare comment from George and Howard. I ran into some of my own
posts from 2014, where I was reporting consistent PE of 11-something. That is, the curves produced by this worm
now are worse than they were 6+ years ago.

It is my belief that the worm is simply worn out. Perhaps all of those years between its manufacture and my
relubing the mount took a toll. That is, I'm confident that the worm was spectacular when it left the factory in Mar
2010. The poor results I've been getting since then are due to my own negligence.

I have some outstanding messages to two members of the A-P staff, and one A-P staffer requested some PEMPro
data, which I sent to him. I haven't heard back. But it's vacation time, and now we have the Labor Day weekend.
In the meantime, I decided that as long as the curves are smooth, I'll live with the native PE -- that is, unless
someone can identify a specific, correctable error that I'm making in my procedures. I put my name on the "notify
me" list for the Mach2. When (if!) I get a Mach2, I'll probably send my Mach1 to A-P for refurbishment. That, way,
when I offer it for sale, I can confidently say that it's up-to-spec and has been blessed by A-P.


Re: PEMPro vs PHD2 #Guiding

CurtisC
 
Edited

Ray: Thank you for looking at my data.

During the afternoon of Sep 2, prior to the runs I sent to you, I removed the RA box.  I thought maybe there was "gunk" deep in the teeth of the worm.  Maybe that was the cause of my bad numbers.  So I made a special point of cleaning out the teeth in the center part of the worm with a toothbrush and paper towels pressed over a fingernail.  I'd already cleaned out the teeth a month ago, but this was a special effort to get to the bottom of it, so to speak.  I then put more lube on the worm and reassembled the motor to the mount.  Since I'd spun the worm several times, I had no choice but to do a PEMPro run.  That produced the 6-something curve.  I reran the curve late in the evening, hoping I'd see evidence of a consistent improvement.  I don't want to rely on an anomalous one-off curve to program the mount.  The second run gave me the 11-something result.  I attribute the "good" curve to new grease in the teeth of the worm, grease that was redistributed during subsequent imaging with the mount and then the late PEMPro run (was there more than one?  I forget.)  Since the evening of Sep 2-3, subsequent remeshings and PEMPro runs have produced p-to-p in the area of 18 and 19.  The curves are smooth.  Last night I had 19 p-to-p.  But, with PEC on, the corrected curve was 0.87, which I thought was pretty good.  All of this is with fundamentals 1, 2, and 3 checked.

Thank you again, Ray.

Please affirm: PEMPro, while it's doing a PE run, knows the exact rotational position of the worm any moment, does it not? When the dots start appearing on the graph, the starting location isn't random.  The starting location and subsequent dots correspond to real, definable positions on the worm.  Sometime during the recent weeks, a consistent broad hump in the middle of the curve was replaced by a consistent broad trough.  I attribute this to my fiddling with the worm.  

To continue, during these recent weeks, I've spent a lot of time in the message archives of this forum, looking at any discussions about Mach1 PE, worms, motor boxes, PEMPro, etc.  Naturally, I've paid special attention to any comments from you and Roland, and the rare comment from George and Howard.  I ran into some of my own posts from 2014, where I was reporting consistent PE of 11-something.  That is, the curves produced by this worm now are worse than they were 6+ years ago. 

It is my belief that the worm is simply worn out.  Perhaps all of those years between its manufacture and my relubing the mount took a toll.  That is, I'm confident that the worm was spectacular when it left the factory in Mar 2010.  The poor results I've been getting since then are due to my own negligence.  

I have some outstanding messages to two members of the A-P staff, and one A-P staffer requested some PEMPro data, which I sent to him.  I haven't heard back.  But it's vacation time, and now we have the Labor Day weekend.  In the meantime, I decided that as long as the curves are smooth, I'll live with the native PE -- that is, unless someone can identify a specific, correctable error that I'm making in my procedures.  I put my name on the "notify me" list for the Mach2.  When (if!) I get a Mach2, I'll probably send my Mach1 to A-P for refurbishment.  That, way, when I offer it for sale, I can confidently say that it's up-to-spec and has been blessed by A-P.

Thank you again, Ray.


Dec motor removal

thefamily90 Phillips
 

Looks like it will have to wait until I come back to my farm in a couple weeks to get the motor off. The button bolt between the two regular hex bolts on the right was so tight I could not get it loosened. It uses a 1/8 Allen wrench correct? Hopefully not, but I may have to drill that screw out to get it removed.
 
Best,
 
Jim


Re: Mach2 Keypad

Roland Christen
 

The new keypad will require a new version of the CP5 software. Updating the CP5 is super easy and takes about 15 seconds.

Rolando



-----Original Message-----
From: Dean Jacobsen <deanjacobsen@...>
To: main@ap-gto.groups.io
Sent: Mon, Sep 7, 2020 9:03 am
Subject: Re: [ap-gto] Mach2 Keypad

On Sat, Sep 5, 2020 at 01:35 PM, Marj Christen wrote:
I am doing some final edits to the keypad manual right now.  We plan to be shipping the keypad with the new v5 to all Mach2 owners that ordered one next week. We will send an email with additional information.
Marj,

Is the new keypad with the new software "plug and play" for current Mach2 owners or do they also have to update their CP5 as well?
 
--
Dean Jacobsen
http://astrophoto.net/wp/
Image Gallery - http://astrophoto.net/wp/image-gallery/
Astrobin Image Gallery - https://www.astrobin.com/users/deanjacobsen/ 
Amateur Radio Call Sign - W6DBJ


Re: PEMPro vs PHD2 #Guiding

Ray Gralak
 

Curtis,

I looked at your logs, and unless the image scale had changed, I do not have a definitive explanation for the dramatic change in periodic error. It may be due to the RA gear mesh needing adjustment. You may want to contact A-P for help on this.

-Ray Gralak
Author of PEMPro
Author of APCC (Astro-Physics Command Center): https://www.astro-physics.com/apcc-pro
Author of Astro-Physics V2 ASCOM Driver: https://www.siriusimaging.com/apdriver

-----Original Message-----
From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of CurtisC via groups.io
Sent: Sunday, September 6, 2020 7:26 AM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] PEMPro vs PHD2 #Guiding

Ray Gralak: I replaced the entire folder in Files.


Re: PEMPro vs PHD2 #Guiding

Ray Gralak
 

Hi Ajay,

This is a hypothesis. I think the reason CCD Ware was suspected by Google
and other malware detection
Nice hypothesis, but that had nothing to do with this.

Best regards,

-Ray Gralak
Author of PEMPro
Author of APCC (Astro-Physics Command Center): https://www.astro-physics.com/apcc-pro
Author of Astro-Physics V2 ASCOM Driver: https://www.siriusimaging.com/apdriver

-----Original Message-----
From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of Ajay Narayanan
Sent: Monday, September 7, 2020 10:25 AM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] PEMPro vs PHD2 #Guiding

This is a hypothesis. I think the reason CCD Ware was suspected by Google and other malware detection
programs is because of "Ware" in the name. Warez is a term used by software pirates to describe the goods
(software) they peddle across the internet. Often these sites seed all malware by enticing people with cheap or free
software. See this link but be aware that there are not safe for work pictures related other articles about the dark
web: https://darkwebjournal.com/warez-sites/

Ajay


Re: Re greasing an old ap 9 gto

Mike Dodd
 

On 9/7/2020 12:43 PM, vincent.visonneau wrote:
Hi
I would like to replace the old grease of my 900gto.
I think i must buy few lithium 3-1 grease, is there some tips to not
damage my mount..
A-P sells a re-greasing kit that contains two types of grease, a brush, and instructions. Contact A-P directly; I don't think it's on the website (but I could be wrong).

--- Mike


Re: Re greasing an old ap 9 gto

Michael Hambrick <mike.hambrick@...>
 

Hi Vincent

There have been several discussion threads on the forum concerning the type of grease to be used (search for messages about "grease"). One of the recommended types is Aeroshell 33, but Rather than risk giving you the wrong specification for the grease, it would be better for you to call Astro-Physics directly because I think their greases are custom blended. They sell mount re-greasing kits with the two different types of grease needed to re-grease the mount. If the shipping overseas takes too long they can probably tell you what king of grease to look for locally.

I do remember one forum thread where Roland recommended to avoid greases containing sulfur (e.g. Aeroshell 33MS) because it will damage brass and bronze gears.


Best Regards

Michael Hambrick
ARLANXEO
TSR Global Manufacturing Support
PO Box 2000
Orange, TX 77631-2000
Phone: +1 (409) 882-2799
email: mike.hambrick@...


Re: Re greasing an old ap 9 gto

Steven Panish
 

Vincent,
AP sells a grease kit which has separate types of grease for the worm and spur gears.  It is pretty expensive and would be more so if it had to ship to France.  Maybe your distributor has it.  The kit has good instructions plus you need the gear mesh instructions from the AP website.  If it isn't practical to get the kit I can scan the instructions for you.  AP can likely tell you what kinds of grease would be best.

Steve

On Mon, Sep 7, 2020 at 12:44 PM vincent.visonneau <v.visonneau@...> wrote:
Hi
I would like to replace the old grease of my 900gto.
I think i must buy few lithium 3-1 grease, is there some tips to not damage my mount..
Regards
Vincent from France


Re: PEMPro vs PHD2 #Guiding

Ajay Narayanan
 
Edited

This is a hypothesis. I think the reason CCD Ware was suspected by Google and other malware detection programs is because of "Ware" in the name. Warez is a term used by software pirates to describe the goods (software) they peddle across the internet. Often these sites seed malware by enticing people with cheap or free software. See this link but be aware that there are not safe for work pictures related to other articles about the dark web:  https://darkwebjournal.com/warez-sites/

Ajay


Re greasing an old ap 9 gto

vincent.visonneau
 

Hi
I would like to replace the old grease of my 900gto.
I think i must buy few lithium 3-1 grease, is there some tips to not damage my mount..
Regards
Vincent from France


Re: Mach2 Keypad

Wayne Hixson
 

Great to hear Marj! Although I could “get along” without it, I miss my keypad! Like an old friend for quick go-to’s and positioning. Thanks for all the hard work. 

Wayne


On Sep 7, 2020, at 7:03 AM, Dean Jacobsen <deanjacobsen@...> wrote:

On Sat, Sep 5, 2020 at 01:35 PM, Marj Christen wrote:
I am doing some final edits to the keypad manual right now.  We plan to be shipping the keypad with the new v5 to all Mach2 owners that ordered one next week. We will send an email with additional information.
Marj,

Is the new keypad with the new software "plug and play" for current Mach2 owners or do they also have to update their CP5 as well?
 
--
Dean Jacobsen
http://astrophoto.net/wp/
Image Gallery - http://astrophoto.net/wp/image-gallery/
Astrobin Image Gallery - https://www.astrobin.com/users/deanjacobsen/ 
Amateur Radio Call Sign - W6DBJ

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