Gamma Dog Maxi was built with basically the same 3D Printed housing that Charles designed, but extended to fit a large 63x63mm NaI(Tl) detector. It is much closer in size to my main Gamma Dog line with 4" diameter housing and since I was reusing the old Gen3 electronics, this unit received the electronics package with serial number "AS001"
Beyond the larger housing size and construction is identical to Gamma Dog Mini.
The unit is slightly shorter than my workhorse GD and lighter than the original GD series but still fairly heavy due to the weight of the detector.
I also made a strap with handle to hang from when scanning near ground level
The old end-cap, housing the electronics has an identical design to the new one but components are mounted with more exposed fasteners on the front face. I updated all 3 electronics packages with digital volume control and wired the charge-indicator / Squelch-Set LED in the Green button (previously unused in these units). The only thing missing when compared to Gen4 is the High-Voltage PMT Bias voltage-divider / voltmeter.
This is not a huge issue as the detector is fixed and sealed and there is no intention to make it field-swappable. The diagnostics routine automatically excludes the HV-Supply health-check at startup for these Gen3 boards.
Gamma Dog Maxi and Mini side-by-side.
One advantage or the red housing is that I dont have to look hard to find them when I leave them aside to dig.
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