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Found 2 results

  1. As I shall be off work for just over a week during Christmas I thought I should find myself a little project to stop me from going stir crazy! I have been having a little trouble with my jump starter power pack recently and have been thinking about making a mains power adaptor. Therefore I thought this would be the perfect opportunity to build one. At the moment I am only worried about powering my CG5-GT mount and an anti-dew heater band, but I am including another two power outputs for future purchases! Each output will be independently fused in addition to a main case fuse. This will all run through an RCD. I am hopefully going to be getting all the parts from my local Maplins store on Saturday so that I can be sure to have them for the holiday. My parts list consists of: 1x ABS Box MB4 (LH23A) 2x Panel Mount Power Socket 2.1mm (JK09K) 1x Switched IEC Chassis Socket (N94CZ) 2x Panel Fuseholder (GU73Q) 1x LED Toggle Switch Red (N26BJ) 1x Euro 3Pin Lead 5m Black (QZ82D) 1x CCTV 12Vdc Regulated 5 amp Switch-mode Power Supply (N63JN) Plus 3 amp wire in red and black. I'm going to add a 12v fan to draw out any heat that may build up in the case and put a couple of filters at the opposite side of the case to allow for air ingress. I will probably also add some feet to the bottom of the case just to keep it off of the floor & reduce any possible vibration noise from the fan. Not including the wire it comes to £53.53. I could probably source some of the parts cheaper elsewhere, but I wanted all the bits ready for the holiday and I didn't want to have to rely on the post getting through in time. If anyone sees any glaring problems or ommisions then please let me know. I am intending on taking pictures during the build which I will post here for your delight and edification!
  2. I have a SkyWatcher Quattro telescope with 2" focuser (and also a 1.25" adaptor) and am looking for a barlow. With a short tube (800 f/4) I feel like I need more than a 2x barlow for imaging planets, but the problem is that 2" barlows aren't cheap. I wonder, is it possible to use a 2" barlow AND a 1.25" barlow for photographic uses (say, two inch 2x barlow plus one and a quarter inch 2x barlow)? On the end of the second barlow I would screw a 1.25" -> T2 adaptor and then the DSLR. Technically it all makes sense but would there be any vignetting or some other optical issues? Here's an illustration of what I mean.
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