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AstroTrac TT-320X AG Tracker mount.
British made and a quality piece of engineering. This is the auto guide version.
Magnetic Illuminated Polar Scope
Mains power supply
Cigarette adaptor power cord
£325 + £10 P&P
Collection from Cheltenham available
PayPal or cash on collection
By David Holdaway
For those struggling to collimate there Astrotrac Polarscope (as I was), check the tube housed in the main body of the scope for flex and ensure it is the right way round.
today I removed the tube and swapped it around, this made ALL the difference, collimation was a breeze after this.
I have already swapped out the grub screws for thumb screws and remember to make tiny adjustments each time.
So this thread will cover in fact PoleMaster, Astrotrac and GiroMini because this is my setup.I bought the PM (PoleMaster) since the Astrotrac has a fail polar scope (no matter how you fiddle about it), and of course the dedicated adapter to mount PM on the AT (Astrotrac) arm.
PM is a real joy to use, but somehow I suspect the AT polar arm has some "issues", so I bought another PM adapter for AZEQ5 and mount it right on the GM (GiroMini).It was based on another suggestion I made to a fellow astronomer, but nobody did it.
Long story short, below the new adapter in place. I am certain this is as close to the rotation axis as it can be. The plan is to replace those M3 screws with M3 thumb screws in the future for easy setup and not to have the PM there when I don't use it.
I will post more pictures "in the wild" and on site results ,but now the clouds are here because my new ES 82° eyepieces also arrived
I'm off to Kelling Heath Star Party again in a few weeks and I'm having a sort out of stuff to sell at the event. I'll be on pitch 167 (the new area behind the loos on the yellow field) from Wednesday 20th September.
Amongst possibly a few other things, I'm planning to have the following items for sale
Astrotrac (Mk1) with custom polar scope and battery pack. This has given me years of faithful service, but I've realised that, taking only 5 minutes subs with a 50mm lens, I just don't need the accuracy this lovely bit of kit can deliver. I've downgraded to a secondhand iOptron Skytracker which can be mounted on my existing birdwatching/camera tripod and hence take up less room when we go away.
This is the early Mk1 version of the Astrotrac. I works really well and comes with a custom-made polar scope consisting of a EQ5 polar scope mounted in a custom adaptor. It also comes with a plastic box for housing 10 x 1.2v rechargeable AA batteries and the original power lead.
The latest version of the Astrotrac costs >£400 + >£100 for the polar scope. I'm asking £295.
Lunar and planetary webcam user guide - Martin Mobberley - £4
Norton Star Atlas (18th Edition) - Ian Ridpath - £4
A selection of Sky at Night and Astronomy Now magazines from the last two years - FREE to a good home