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I’d also be interested to hear from anyone who’s getting good meteor captures with the Watec 902H.
If I recall correctly, the AGC only has low and high settings. As Callum says, the low setting is very dim, so you only record fireballs. The high setting is very noisy. If you stack the frames for 30 seconds you can get some nice deep images, but for meteor searching it’s not great, because the meteors are lost in the noise.
My solution was to upgrade to a Watec 902H2 Ultimate, which has an AGC knob, so I could tune the gain to a happy medium. But I do gather others are getting on OK with the 902H. I was wondering whether some kind a pre-amp between the camera and the digitiser would help, but Callum tells me he’s tried that and it hasn’t helped!