Now replaced with GS_USB-PRO

The GS-1100-PRO was the second generation GS, it has been a great workhorse, with over 1000 units sold, but has now been superseded by the new GS-USB-PRO .

I still have parts left to make the GS-1100-PRO and I can still make these to order if anyone wants it,  but I strongly recommend potential buyer to consider the new model.

GS-1100-PRO Technical Specifications   
Input Power (USB) + 5V
Current Draw < 200 ma
Output Bias Voltage (smooth potentiometer) 0V to 1100V
Output Signal (Audio Line Level) + 0 - 2500mV
Pulse length 100 ┬Ás
Preamp Gain (adjustable trim pot on bord) set to ~10%
Ripple < 1 mV
Voltage Drift <1:1000V
High Voltage Connector BNC
Signal in Connector SMA
Audio Out Connector Mono jack


1 x USB Cable

1 x 3.5 mm mono jack cable

1 x SMA to BNC Cable

1 x Quick Setup Manual

Gamma spectacular outputs an audio signal proportional to the input pulse energy, and is designed to work with sound card spectroscopy software, utilizing the analog to digital capabilities of modern computers.

This unit does not come with a radiation detector. For basic radiation activity measurements, it will work with most GM tubes or pancake detectors, and for Gamma spectroscopy it will work best with NaI scintillation detectors coupled for positive voltage. Please feel free to send us the make and model number of your radiation detector, to confirm suitability.

Any computer with a sound card and mic/line in audio jack port will work. The recommended software is for PC, but it will work perfectly on Mac OS-X with Crossover by CodeWeavers

There are several great programs available for sound card spectrometry, and most of them are FREE, please see our software download section for the program that suits your need here.

Still have questions? .......... Contact us


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GS-1100-PRO (Discontinued)

  • Product Code: GS-1100-PRO
  • Availability: Pre-Order
  • USD $399.00

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Tags: gammaspectacular, GS-1100-PRO, multichannel analyser, MCA, USB MCA

Refund & Return Policy

We want you to be 100% happy with your Gammaspectacular product, and offer free after sales support to get you up and running.

If you for any reason you require a refund or replacement, please contact us within 30 days of purchase to arrange the return.
Return shipping cost and risk is the sole responsibility of the buyer.

Return shipping address: Bee Research, Po Box 6259, Alexandria, NSW 2020, Australia