Jump to content

Stargazers Lounge Uses Cookies

Like most websites, SGL uses cookies in order to deliver a secure, personalised service, to provide social media functions and to analyse our traffic. Continued use of SGL indicates your acceptance of our cookie policy.

jambouk

Celestron advanced GT handset lead

Recommended Posts

Is it possible to get an extension lead for the handset of the Celestron Advanced GT mount? 

Thanks

James

 

F65439AF-40E0-40D3-B25F-0C8FEDC1033E.jpeg

Share this post


Link to post
Share on other sites

Try "RJ12 extension cable" in a search engine. I added an RJ12 coupler adaptor block and 1m long cable to the handset on my Skyprodigy without any problems. Just make sure that you get the "6P6C" versions, as there are also similar RJ11 adaptors/leads, (often labelled "6P4C") but with only connections on 4 of the 6 possible positions.

Share this post


Link to post
Share on other sites

Thanks. Just ordered one. Will see if it does the trick!

cheers.

james

 

Share this post


Link to post
Share on other sites

I ordered a 10m handset extension cable from Astronomiser but sadly it only worked intermittently, from what I can gather it is more likely to work in shorter lengths. However the same cable works fine on my Skyprodigy Mount! How long is your cable? 

Share this post


Link to post
Share on other sites

I’ve ordered a 3m one. It was only £3 so not great loss if it doesn’t work, but I’m hopeful. It’s not my mount so trying to help a friend.

Share this post


Link to post
Share on other sites

That’s a more sensible length than 10m! ? Fingers crossed. 

Share this post


Link to post
Share on other sites

From my understanding of the handset/mount interface, the circuitry is designed round 3.3V TTL and not the sort of robust, balanced, Ethernet-style interface. The longer the cable, the more the transmitted pulse shape and amplitude will be degraded, to the point that the receiver will not change state, and this is most likely to show up as intermittent operation. Additionally, you are less likely to trip over a short cable in the dark.

Geoff

  • Like 1

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Recently Browsing   0 members

    No registered users viewing this page.

  • Similar Content

    • By Gryffster
      Hi - I'm a relative newcomer to telescopes with goto - still trying to figure them out.
      I have a problem with Goto on the 8SE.
      Alignment usually works (Not always, but usually)

      I believe my set up is correct - time and date, DST and UTC (It's currently BST in the UK)

      I usually use 2-star alignment (Currently, most convenient for me are Sirius and Procyon)
      Alignment usually succeeds, but goto just doesn't. The scope slews away, sometimes even to a completely different part of the sky from the selected object (I'm familiar enough with
      the sky to be able to identify several bright stars without assistance)
      Bizarrely, this happens even if the goto object is one of the alignment stars - how could it possibly not be able to find a star when you've explicitly told it where it is?
      I've read that goto sometimes doesn't work well on battery power, so I've aquired a mains adapter. No change.
      I haven't yet updated the handset firmware (I'm waiting for a serial-usb adapter.)
      Any help would be appreciated.
      Thanks
    • By The-MathMog
      Because of the current situation, I have, as many of you guys probably have too, spend a lot more time under the stars when possible.

      It has literally been over a year since last I was out doing some astrophotography because of work.

      So here is my second take after the long break, NGC 3344 (The Sliced Onion Galaxy).
      Initially I thought it would be a lot fainter than it was, so it was basically a shot in the dark, of just trying to get back at doing this.
      But the final image actually showed a lot more detail than I would've hoped for!
      Spring lent a lot of clear night, but those seems to be gone already. I would've hoped for a few more hours to add some more luminance data to it, as I did have to push it quite a bit.
      I am not too happy with the shape of the stars either. Guiding was not very stable through the night, even though balance and polar alignment seemed to be good. Might need to update my Celestron PEC data? 

      Any advice or feedback is very welcome! 🤩
      NGC 3344 (Sliced Onion Galaxy)
      _______________________
      Image:
      Luminance - 13x16 min
      RGB - 2x16 min each
      Flat and Dark calibrated
      Gain 111
      Offset 40
      Total Integration - 5 Hours 4 minutes  (LRGB)
      _____________________
      Gear Used:
      Skywatcher 150PDS
      Celestron AVX Mount
      ZWO ASI 183MM-Pro
      Baader 2'' Neodymium Filter
      Baader 1,25'' RGB Filters
      ZWO Mini EFW
      Explore Scientific Coma Corrector
      ToupTek Camera G-1200-KMB Mono Guider
      Orion Mini 50mm Guidescope
      ______________________
      Software:
      Sharpcap
      PHD 2
      Photoshop CS2
      Deep Sky Stacker
      Stellarium/Stellarium Scope
      Astrotortilla

    • By Geordie mc
      Hi. Just starting to use autofocus with the Celestron motor focus and SGP. Can anyone give me some starting points for step size, backlash etc. I’m getting there but wasting a lot of imaging time just trying to get this to work accurately. I’m currently trying a step size of 75 and a backlash of 50. Any tips most appreciated.
    • By Tugboat
      I'm having a bit of a clearout to make way for a new project.  For sale here are a couple of items that have seen very litle use:
      1) Celestron Omni CG-4 GEM Mount + Tripod - £125 *** SOLD ***
      This is in generally very good condition.  There are a few marks, and scuffs consistent with normal use.  There are also a couple of minor (small) patches of surface rust on a few of the bolts and steel legs.  It has seen very litle use, and has been in storage for the past few years so it is time to find it a good home.  The small rubber tips that go on the very end of the feet have perished, so these won't be included.
      It includes tubular steel tripod, 2 counterweights, built in polar scope, built in bubble level and slow motion controls.
      Due to size and weight, collection would be preferred from the RG27 area.  If you are reasonably local, I would also consider delivering.
      Price: £125, but I am open to offers.  Payment can be made via Bank Transfer (preferred), Paypal or cash on collection
      2) ***SOLD*** Celestron Omni XLT 127mm Telescope ***SOLD ***
      Again this is in very good condition, and has been in storage for the past few years and has had very little overall use.  A few marks on the dovetail as is to be expected.
      It includes a small finderscope, diagonal and a 25mm eyepiece
      Can be collected from the RG27 area, I could deliver if you are reasonably local, or can be posted for an additional £8.
      Price: £110, but am open to offers.  Payment can be made via Bank Transfer (preferred), Paypal or cash on collection *** NOW SOLD ***
      Any questions please do let me know.










    • By Gregely
      Hi SGL
      I popped this topic on CN too but noone seems to know anything.

      I came by an old Celestron Ultima 8 pre-PEC. I really like the scope and the mount it may be that I have read too much of Uncle Rod's and other's praise that I feel this scope has some intangible personality and charm.
      Anyway...
      Circuitry in the base seems to work fine even though the batteries don't hold charge but drive the Ra axis . I have 2 replacement on its way to me.
      Now my issue: It didn't come with a hand controller. I know it is not needed for tracking, and I don't have a Dec motor but I find it would be useful for centering in RA and D.A.R.V. method drift alignment.
      I was on the verge of making a crude controller out of veroboard and 4 momentary switches that I thought to be correct from the info on various sites, but then I came across an Ultima 8 project that clearly showed the hand controller for my scope.
      The pic attached is the one.
       
      I am looking for help on how the dial and buttons are wired in and/or photos of the innards of the hand controller or if anyone knows what else is inside the handbox.
      The sources I was going on so far is a combination of the following 3 links:
      https://www.cloudyni...ding/?p=8015749
      https://onstep.group...in/message/6300
      https://github.com/garlick/ultima8/blob/master/base/README.md
       
      These of course don't include drive rate rotary switch in the middle and if I could I would really like to to restore the full ability of this mount without spending too much  on electronics. Plus I don't want to spend time and effort on wiring something that doesn't work.
       
      Oh and lastly I have no background  or experience in electronics just own a soldering station and a whole lot of determination.
       
      Thanks in advance
      Greg

×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.