DIY HF SSB Receiver 20M with AD9850 DDS tune option and Active Hula Loop Antenna

http://www.rhelectronics.net/store/diy-hf-ssb-receiver-dds-active-hula-loop-antenna

The receiver is a simple syperheterodyne type with quartz crystal filter. The circuit is based on two NE612 mixer IC’s and one audio amplifier LM386. 

Gamma Spectrometry Detector Driver DIY Kit High Voltage Power Supply 700V-1000V with Pulse Pre-Amplifier

Gamma Spectroscopy Driver DIY Kitinclude low ripple Adjustable Power Supply Unit 700v-1000v with MetalEnclosure and Transimpedance pre-Amplifier module. This kit can be used as Spectrometry Driver for your own DIY PMT probe. The amplifier output is compatible with freeware PRA Pulse Height Analysis software. Power supply unit and pre-amplifier are sold fully soldered. HV unit installed into separated metal enclosure.

Technical Specifications:

• Positive High Voltage stabilized output: 700V-1000V
• Compatible with DIY Scintillation Probes
• Compatible with freeware PRA Software
• Battery DC voltage: 4.8V-5.5V
• Battery current with 100M load at 1000V: 6mA
• Battery quiescent current at 1000V: 3mA
• Pulse length: 250uS
• Full start time: app. 15 seconds with 100M probe load
• Recommended load of the PMT probe divider: 80-100 Mega ohm
• HV Power Supply dimensions: 115x60x30 mm
• Pre-AMP PCB dimensions: 33x40 mm
• Shipping Weight: 500gr
• UPC Number: 635292807404
• SKU: RH-K-PMT-2

You can order the spectroscopy driver kit by following this link:
http://www.rhelectronics.net/store/gamma-specrometry-detector-diy-kit-high-voltage-power-supply-700v-1000v-1kv-with-spectrometry-pre-amplifier.html

PMT Photomultiplier / Geiger Tube High Voltage Power Supply DIY Kit 700v - 1000v

Simple DIY kit for 1KV positive output power supply. Can be used for Scintillation probes or for rare high voltage Geiger tubes. This kit is recommended only for experienced hobbyist who know how to use high voltage devices safely read more...