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Amp glow ?
I would have thought cooling it to -15* would take care of that.
I've built a sensor cooled 450D with full spectrum cut and that is pretty noiseless and without amp glow @ about 5*. I could get to about -10 quite easily but then dew\ice becomes a problem. Have to go with Glen's Argon modification I think.
Do you have any dew problems with the 174 ? I relaise it is sealed with silica internally but what about the front window external surface ?
Your Saxon compares well with my Lunt ED 102 F7 hence the question.
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