Tweedledee Posted March 31, 2013 Share Posted March 31, 2013 (edited) What do you do on Easter Sunday? Edited July 10, 2015 by Tweedledee Link to comment Share on other sites More sharing options...
oldfruit Posted March 31, 2013 Share Posted March 31, 2013 I made one of these last week for my telrad as it always dewed up really quickly. It really does work well and the couple of times i have had the scope out it has not dewed up at all. Picked the foam up off ebay for about £1.50 for 2 x A4 sheets. Link to comment Share on other sites More sharing options...
Guest Wayne Posted March 31, 2013 Share Posted March 31, 2013 Funky foam- its the future :-) Link to comment Share on other sites More sharing options...
Tweedledee Posted March 31, 2013 Author Share Posted March 31, 2013 Reckon you got the same foam as me then Mark. Glad I had two sheets, 'cos I ballsed up the first sheet with a cut in the wrong place, even though I was being very careful . Link to comment Share on other sites More sharing options...
Tweedledee Posted March 31, 2013 Author Share Posted March 31, 2013 Wayne, I'd never heard of Funky foam till Cazz mentioned it . Link to comment Share on other sites More sharing options...
oldfruit Posted March 31, 2013 Share Posted March 31, 2013 Easy done Pete. Glad i have a spare one though, for myself or anyone else that need one in future. Also i was able to make a small dew shield for my 8x50 finder with the cut off so very little waste. Link to comment Share on other sites More sharing options...
Tweedledee Posted March 31, 2013 Author Share Posted March 31, 2013 Brilliant idea Mark. My messed up sheet will still be plenty big enough for a finder dew shield, glad I didn't chuck it in the bin now. Link to comment Share on other sites More sharing options...
Guest Wayne Posted March 31, 2013 Share Posted March 31, 2013 I think that she's got shares in it. :-) Link to comment Share on other sites More sharing options...
angusw2 Posted March 31, 2013 Share Posted March 31, 2013 Oooooh this looks like a good idea. I was frozen out last night. My Telrad window looked like frosted glass by pack up time! Angus Link to comment Share on other sites More sharing options...
Tweedledee Posted March 31, 2013 Author Share Posted March 31, 2013 Please feel free to copy the design and dimensions on my drawing or modify in any way. I might be looking to collect some royalties at some stage, such as a peek through a 12" dob, cheers. Link to comment Share on other sites More sharing options...
T A WOW Posted April 2, 2013 Share Posted April 2, 2013 Thats looks good. Link to comment Share on other sites More sharing options...
Cazz Posted April 2, 2013 Share Posted April 2, 2013 I'm pleased my skills and knowledge have come in handy some where. ;-) Your drawings are very precise, very useful, thank you Encyclopeteia :-) Link to comment Share on other sites More sharing options...
Teslar Posted April 2, 2013 Share Posted April 2, 2013 I have one of those but sorry to tell you it had little effect on my dew problems. So I've now done the 3W resistor mod Link to comment Share on other sites More sharing options...
Tweedledee Posted April 2, 2013 Author Share Posted April 2, 2013 I have one of those but sorry to tell you it had little effect on my dew problems. So I've now done the 3W resistor mod I've also heard various mixed reports. I'm sure dew forming conditions vary greatly in different areas with different set ups. I have read reports that some people only manage to successfully stave off dew using combination of both electrical and shielding methods. But I'm sure that dewing something is better than dewing nothing, Sorry . Link to comment Share on other sites More sharing options...
Tweedledee Posted April 2, 2013 Author Share Posted April 2, 2013 I'm pleased my skills and knowledge have come in handy some where. ;-) Your drawings are very precise, very useful, thank you Encyclopeteia :-) Cheers Cazz. You've certainly been an inspiration . Link to comment Share on other sites More sharing options...
Tweedledee Posted April 2, 2013 Author Share Posted April 2, 2013 Here's some info worth reading about dew and its control... http://www.astro-tom.com/tips_and_advice/dewing.htm Sometimes simple things work. As mentioned in the above article, if you have a large tree close behind you whilst observing, the tree is likely to collect most of the dew in preference to your optics. Obviously you will only be able to observe the part of the sky not obscured by the tree, but nothings ever perfect . Link to comment Share on other sites More sharing options...
Teslar Posted April 2, 2013 Share Posted April 2, 2013 Well I do live further north than most of you so perhaps my dew problems are worse however I found the resistor mod really helpful for the telrad. If the dew shield alone does it for you then your luckier than me in the dew stakes Link to comment Share on other sites More sharing options...
Tweedledee Posted April 2, 2013 Author Share Posted April 2, 2013 I will report back when I have got some use out of it Tom. Is your resistor mod the one that runs direct from the Telrad batteries? Link to comment Share on other sites More sharing options...
Teslar Posted April 2, 2013 Share Posted April 2, 2013 No I power it from a spare port on my dew heater control box. That gives me variable control Link to comment Share on other sites More sharing options...
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