Skyscout Battery Sleeves?
Posted 30 July 2009 - 09:48 PM
Long and the short of it is there were no "battery sleeves" in the battery compartment, just the compartment itself and cover. I assume these must be some kind of shielded tube to keep the batteries from leaking EM and messing up the digital compass? Any suggestions for a field retrofit?
Messing with the thing, it's about 5 degrees off on locating targets, yet on identify it's pretty much on the bright stuff, (it did miss Polaris by about 5 degrees though).
I bought it primarily for the audio portion for outreach. Still, I would like to try to get it working properly. Any suggestions on the sleeve issue?
Posted 31 July 2009 - 12:55 AM
Posted 31 July 2009 - 08:28 AM
Posted 31 July 2009 - 10:53 AM
Posted 31 July 2009 - 02:02 PM
I went to the hardware store and found some brass tubing that fits the bill, which nicely fits AA batteries. I'm also assuming that they may work better than the stock battery sleeves because they are thicker. The previous SS owner said he bent one of the sleeves by accident. The brass tubing is very rigid, so I assume a thicker wall which may help. If the material is correct, non farrus but conductive, then these should work better than the stock shields. I'm sure Celestron is trying to make stuff as cheap as possible, hence the thin aluminum tubes. If so, then the brass tube should work much better.... but I won't know until tonight.
I cut two lengths and installed them in the SS. I took it for a test run. I asked it to locate Polaris, which I know where it should be. It appeared to point more accurately than it did last night but I won't know until it is dark tonight.
I'll update what I find.
Posted 31 July 2009 - 04:00 PM
It looks to be a combination of nickel and iron, which would make it somewhat ferrous. If I recall, nickel is not ferrous, and this stuff is 84% nickel. Brass is not ferrous, but it is a conductor. Hmmmm, guess I'll just have to wait and see if it works tonight.
Thanks for the info.
Posted 01 August 2009 - 08:14 AM
Posted 01 August 2009 - 12:04 PM
Thanks for the update. I think it's just a matter of time before I loose my battery sleeves. Good to know there are other options.
Thanks! Steve S
Posted 01 August 2009 - 12:30 PM
Posted 25 August 2009 - 12:32 PM
Posted 09 September 2009 - 08:51 PM
I was wrong that the Skyscout worked fine with the sleeves off. The magnet icon quit nagging and precision was improved, but there was still significant error.
I'm now storing the sleeves without batteries installed. The batteries shouldn't produce a field unless they're providing current, but perhaps some battery casings become magnetized and that field is eventually picked up by the sleeves.
Posted 02 November 2009 - 12:21 PM
Posted 22 December 2009 - 02:00 AM
My GPS just malfunctioned! :john:
Posted 23 December 2009 - 10:42 AM
I wonder if you can make one out of cheap plastic...
What good would plastic do? How would it shield the SS from electromagnetic effects?
Posted 18 February 2010 - 01:32 AM
Posted 15 August 2010 - 10:57 PM
nickel-iron foil as a magnetic shield to protect electronic equipment from EMI/RFI interference