Jump to content

Banner.jpg.39bf5bb2e6bf87794d3e2a4b88f26f1b.jpg

Thruxton

New Members
  • Posts

    16
  • Joined

  • Last visited

Everything posted by Thruxton

  1. Hi, I recently bought a new Nexstar handset ver. Gem 4.16 to use with my AS-GT mount. The original handset was too old to be re-flashed. The latest version is 4.19 and I want to install this. This handset is connected to my laptop's USB port with a USB-serial adapter and a home-made serial-to-RJ11 (?) connector which plugs in the bottom of the handset. I presume all connections are OK because it is in exactly this configuration that I have successfully re-flashed the firmware for both the mount's motors using MCupdate. However, when using HCupdate ver. 1.1.14 I get nowhere. I can put the handset in programming mode (Transmit Data) by switching on wiith INFO/UNDO pressed, but when I click on 'NEXT' in HCupdate it tells me nothing is on the port COM1 - despite the fact that there was a mount there a few minutes ago! I have tried several times, always with the same result (or lack of) Can anybody suggest how I proceed from here? TIA Thruxton:icon_scratch:
  2. Thanks, Spaceboy. It was very tight but has yielded to persuasion. Knowing what to twist was a great help. Thanks Richard
  3. Hi, In a previous thread I mentioned the idea of extending the metal bar on which the large counterwight is mounted. This is because I have a big and heavy OTA and wish to use a lighter counterweight mounted further from the fulcrum. It is not immediately apparent how this bar can be removed, and I don't want to go at it with Stillsons and a big hammer. Is it threaded, clamped, do other components need to be removed to get at it, or what? Any advice would be appreciated. Once it is off, I can turn up a handsome stainless replacement: but I can do nothing until I find out how it comes apart. TIA Richard
  4. Thanks for the McWiki reference, Steve. I'll have a look at it. BTW, the 'yoke' I'm referring to is not the dovetail, it is the big clamp which goes round the OTA. In my case it is a solidly-made wooden design, and moving it up and down the OTA to balance it will require a few mods. Nothing too difficult. I'll just refer to it in future as a clamp and hope others understand which bit I'm going on about. BW Richard
  5. Can't give a manufacturer's name because the telescope was made by the guy I bought it from. I've emailed him for advice but as yet no reply, and anyway extra opinions are always valuable. I'm very much a beginner with 'proper' scopes, after putting up with some pretty awful optics on a cheap one I used to have. I must confess (holds head in shame) to having tried this one out indoors just to see how it works - looking at Saturn through tree branches and double glazing. Hardly ideal but a far better image than I had previously obtained!! Obviously some potential here. My other 'bright' idea is to use a smaller counterweight on a longer bar in an attempt to reduce the overall wight the mount has to cope with. Before I rush off to the workshop, is this a reasonable idea? I suppose it might foul tripod legs, or just get tripped over in the dark.
  6. Can't give a manufacturer's name because the telescope was made by the guy I bought it from. I've emailed him for advice but as yet no reply, and anyway extra opinions are always valuable. I'm very much a beginner with 'proper' scopes, after putting up with some pretty awful optics on a cheap one I used to have. I must confess (holds head in shame) to having tried this one out indoors just to see how it works - looking at Saturn through tree branches and double glazing. Hardly ideal but a far better image than I had previously obtained!! Obviously some potential here. My other 'bright' idea is to use a smaller counterweight on a longer bar in an attempt to reduce the overall wight the mount has to cope with. Before I rush off to the workshop, is this a reasonable idea? I suppose it might foul tripod legs, or just get tripped over in the dark.
  7. At the moment my OTA is held in a yoke/clamp/(what's the correct term? ) which is roughly halfway along the tube (Newtonian) but I wonder if I ought to move it. In its current configuration, the OTA is bottom-heavy and the previous owner had fastened a weight to the top of the tube to balance it. It occurred to me that it might be better with the yoke (etc. . .) closer to the mirror so the top weight could be done away with or reduced in size. Am I failing to realise something blindingly obvious? I can't see any reason to hang extra weights all over the place, and the only side-effect I can anticipate if I move the yoke is that the eyepiece will be just that little bit further off the ground. I am as yet making no allowance for the weight of any eyepiece, and anyway the ones I have are not particularly heavy.
  8. Thanks everybody. Lots of useful info.
  9. Who suggested wives might have a say? OK, it's pretty clear from the replies so far that the EQ5 isn't ideal but it will physically hold it. Therefore I don't think I have a cat in hell's chance of persuading SWMBO to let me spend what I call big money on an EQ6, at least not in the foreseeable. So come what may, this scope is going to sit on the poor overloaded EQ5 for the present. I suppose the main point I wished to clarify wasn't expressed very well. Given that this mount is undersized, will a goto system be unable to function (ie. are the stepper motors physically capable of shifting this monster)? From what you are telling me, I ought to go for a bigger mount but the consequence of this would be a lot of expenditure for a lovely manual mount which will not give me GOTO . Very nice, I expect I'll do it in the longer term, but too much for now without getting a goto capability. What I was thinking was, IF I can get away with adding a synscan to this size of mount, I could at a later date use it with a smaller second scope, get an EQ6 or similar, and then SWMBO and I could each have kit to look through. So, what do you all think? Can I get away with it as a stopgap, or will it just not work?
  10. Good grief, what a welcome! Thanks everybody.
  11. Tne telescope I recently acquired is a 250mm newtonian weighing inat around 16kg, on an EQ5 mount. The previous owner was clearly happy with this setup and it doesn't seem to have fallen over, so as a beginner I can only assume the mount is capble of holding the thing up OK. However, I look forward to adding a goto system (synscsan?). I know it is possible to obtain an add-on synscan for this mount, but am concerned that it might not like all this weight. I have been offered a different EQ5 with synscan already fitted (believed to be originally for a CG5?) and what looks like a half-decent field pier, at a price only a little more than a synscan addon kit. However, the seller won't wait for ever and I need to know (please) if this mount might be suitable or is a complete no-no. Advice would be appreciated, asap pretty please.
  12. Hi, just a quick note to say hello and introduce myself. My 'real' name is Richard and as far as astronomy is concerned I have little experience. Ok, I've looked about the sky with small / cheap telescopes, but now I've acquired a 250mm reflector s/h and want to see what's up there before I get too old. I'm looking forward to lots of free advice from all those who have experience I can benefit from.
  13. I've had a small scope for a while but have just purchased a 250mm f5 Newtonian on an EQ5 mount. This is my first foray into the world of 'proper' mounts, compared to the cheapos I had previously. Anyway, apologies if I'm jumping on board someone else's thread, but I could do with some advice asap about an item I have been offered: and this thread is as close as I can see to what I need to ask . . . . . I would like to add a goto system. I've been offered a synscan fitted to a CG5 mount, at a reasonable price, but am concerned about the capacity of the mount which I believe is 'similar' to the EQ5. Although my 250mm is already on an EG5, I've discovered that the main tube weighs in at about 16kg. Clearly it has worked OK like this because the friend I bought it from never had any problems, BUT if I motorize it, is all this weight going to prevent the synscan working properly? Advice, please?
×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. By using this site, you agree to our Terms of Use.