Re: [Utah-astronomy] Ealing - Astro-physics Model 8002 drive controller
Due to the non-digital, resistor-capacitor design of this old system, it requires adjustment to achieve a precise 60hz fequency. You turn the adjustment knob until the light stays on continuously (or is off continuously). You then supposedly have an accurrate 60 hz and precise sideral rate. It's worth checking periodically during the night to see if the frequency has changed due to a temperature change.
Thanks, Chuck! That explains my weird tracking error test result last night: http://gallery.utahastronomy.com/main.php?g2_itemId=11527 Have to try that one again and see if it improves things. That also may be a source for targeting error in the Skywizard.
until the light stays on continuously (or is off continuously).
No ambiguous signal there. -:) Which is it?
You'll have to ask Bruce or Patrick if SLAS still has the autoguider for the Ealing corrector.
Patrick, does SLAS have the autoguider? Thanks again, Kurt
It's been years since I"ve used it, but I think you adjust until the light goes out. It goes back on when you flip the switch over to a tracking rate. The idea is to bring the unit's crystal to a precise 60Hz. If you're not there, you should notice it immediately, tracking at high power. I'll dig one out of storage this weekend and fire it up. Then I can let you know for sure. I'm off to dinner now, then to a Bees game. Maybe when I get home later tonight. On Fri, Jun 13, 2008 at 3:38 PM, Canopus56 <canopus56@yahoo.com> wrote:
until the light stays on continuously (or is off continuously).
No ambiguous signal there. -:) Which is it?
participants (2)
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Canopus56 -
Chuck Hards